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WO2017035690A1 - Particulate matter concentration sensor and mobile terminal - Google Patents

Particulate matter concentration sensor and mobile terminal Download PDF

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Publication number
WO2017035690A1
WO2017035690A1 PCT/CN2015/088359 CN2015088359W WO2017035690A1 WO 2017035690 A1 WO2017035690 A1 WO 2017035690A1 CN 2015088359 W CN2015088359 W CN 2015088359W WO 2017035690 A1 WO2017035690 A1 WO 2017035690A1
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WO
WIPO (PCT)
Prior art keywords
light
particulate matter
unit
electrical signal
concentration sensor
Prior art date
Application number
PCT/CN2015/088359
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French (fr)
Chinese (zh)
Inventor
侯婷婷
Original Assignee
侯婷婷
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Publication date
Application filed by 侯婷婷 filed Critical 侯婷婷
Priority to PCT/CN2015/088359 priority Critical patent/WO2017035690A1/en
Publication of WO2017035690A1 publication Critical patent/WO2017035690A1/en

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
    • G01N15/02—Investigating particle size or size distribution
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
    • G01N21/47—Scattering, i.e. diffuse reflection
    • G01N21/49—Scattering, i.e. diffuse reflection within a body or fluid

Definitions

  • the invention relates to the technical field of environmental safety detection, in particular to a particle concentration sensor and a mobile terminal.
  • particulate matter pollution in the atmosphere is one of the most common environmental pollution. Excessive particulate matter can cause various lung diseases after entering the lungs, such as silicosis, asbestosis, pneumoconiosis, etc., if the particles contain toxic properties. The metal will also damage the human brain, nerves, kidneys, etc., and it will directly cause death.
  • the prior art methods for detecting the concentration of particulate matter include weighing method, oscillating balance method, light scattering method, etc., and light scattering method is the most common method for measuring the concentration of particulate matter, specifically: inhaling air containing particulate matter into the darkroom to the darkroom When the particles in the light illuminate the light, scattering occurs. Under the condition that the physical properties of the particles are certain, the scattered light intensity of the particles is linear to the mass concentration of the particles, and the scattered light intensity of the particles is converted into a pulse count or the intensity of the scattered light is converted.
  • the electrical mass signal can measure the relative mass concentration of the particulate matter, and then through the preset conversion coefficient, the mass concentration of the particulate matter can be directly obtained.
  • sensors that use light scattering to detect the concentration of particulate matter generally need to include a darkroom, a light unit, a photoelectric converter, a processing unit, a draft unit, and an optical trap unit.
  • the dark room is provided with an air inlet and an air outlet, and the air blowing unit is connected to the air outlet. After the air blowing unit is started, the air in the dark room is extracted, and the air inlet of the dark room draws in air from the atmosphere.
  • the light emitting unit, the photoelectric converter, the processing unit and the light trap unit are all disposed in the dark room, the light emitting unit emits light, illuminates the dark indoor air, and generates scattered light, the photoelectric converter receives the scattered light, and converts the scattered light into an electrical signal, and processes The unit calculates the particle concentration based on the electrical signal.
  • Light The trap unit emits light that is emitted by the light emitting unit and that does not generate scattering.
  • a sensor for detecting the concentration of particulate matter by a light scattering method generally needs to include a dark room, a draft unit, a light trap unit, and the like, and the dark room and the exhaust unit, the light trap unit usually need to occupy a certain volume, so that the volume of the sensor is excessive. Large, inconvenient to carry, unfavorable promotion and application.
  • the present invention proposes a particle concentration sensor capable of greatly reducing the volume occupied by the particle concentration sensor.
  • a technical solution adopted by the present invention is to provide a particle concentration sensor, comprising a light emitting unit and a light processing unit;
  • the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter; the light emitting unit emits light of a predetermined wavelength into a particle-containing environment, wherein the predetermined wavelength of light meets Scattering occurs to the particulate matter to generate scattered light; the light processing unit is disposed within a range covered by the scattered light, wherein the filter layer transparently transmits the scattered light to the photoelectric converter, and filters the Light other than scattered light; the photoelectric converter is configured to convert the scattered light into an electrical signal and transmit the electrical signal to the computing unit.
  • the particulate matter concentration sensor further comprises a calculating unit, configured to calculate a concentration of the particulate matter in the particulate matter-containing environment according to the electrical signal.
  • the wavelength of the scattered light is the predetermined wavelength; and the filtering layer is configured to filter light of other wavelengths other than the predetermined wavelength.
  • the angle between the optical axis center line of the light emitted by the light emitting unit and the optical axis center line of the light received by the light processing unit is not equal to 180 degrees.
  • the particulate matter concentration sensor further includes a baffle; the baffle plate is disposed between the light emitting unit and the light processing unit, wherein the baffle plate is used to block the light emitted by the light emitting unit directly Transfer to the light processing unit.
  • the particle concentration sensor further comprises a housing; the light emitting unit, the light processing unit, The computing unit and the baffle are disposed in the outer casing; the outer casing is provided with a symmetric first through hole and a second through hole; the light emitted by the light emitting unit enters the particulate matter environment through the first through hole; The scattered light enters the light processing unit through the second through hole.
  • the computing unit includes a receiving module, an obtaining module, and a computing module;
  • the particulate matter concentration sensor further includes a storage module, a control module, and an input and output module;
  • the receiving module is configured to receive an electrical signal sent by the photoelectric converter;
  • the obtaining module is configured to obtain, from the storage unit, a conversion coefficient between the preset electrical signal and the particle concentration, and the initial electrical signal, wherein the initial electrical signal is when the light emitting unit does not emit light of a predetermined wavelength,
  • the filter layer receives light having the same wavelength as the predetermined wavelength in a particulate-containing environment, and transmits the light to the photoelectric converter, the photoelectric converter converts the obtained electrical signal according to the light, and the electric
  • the signal is stored in the storage unit;
  • the calculation module is configured to calculate the concentration of the particulate matter in the particulate matter environment according to the received electrical signal, the initial electrical signal, and the conversion coefficient;
  • the control module is configured to control the illumination of the illumination unit;
  • the particle concentration sensor further includes a collecting lens; the collecting lens is disposed on the light emitting unit.
  • another technical solution adopted by the present invention is to provide a mobile terminal including the above-mentioned particulate matter concentration sensor.
  • a mobile terminal including a particulate matter concentration sensor and a computing unit;
  • the particulate matter concentration sensor includes a light emitting unit and a light processing unit; and the light emitting unit is in a particulate matter environment Transmitting light of a predetermined wavelength, wherein the predetermined wavelength of light encounters particles, scattering occurs to generate scattered light;
  • the light processing unit includes a photoelectric converter and a filter layer, and the filter layer is disposed on the photoelectric converter The light processing unit is disposed within a range covered by the scattered light, wherein the filter layer transparently transmits the scattered light to the photoelectric converter, and filters light other than the scattered light;
  • a photoelectric converter is configured to convert the scattered light into an electrical signal and transmit the electrical signal to the computing unit;
  • the computing unit is configured to calculate a concentration of particulate matter in the particulate-containing environment based on the electrical signal.
  • the wavelength of the scattered light is the predetermined wavelength; the filtering layer is configured to filter light of other wavelengths other than the predetermined wavelength; the optical axis center line of the light emitted by the light emitting unit and the light processing The angle between the centerlines of the optical axes of the light received by the unit is not equal to 180 degrees.
  • the particulate matter concentration sensor further includes a baffle; the baffle plate is disposed between the light emitting unit and the light processing unit, wherein the baffle plate is used to block the light emitted by the light emitting unit directly The transmission reaches the optical processing unit and the filter layer.
  • the particle concentration sensor further comprises a casing; the lighting unit, the light processing unit, the calculating unit and the baffle are disposed in the casing; the casing is provided with a symmetric first through hole and a second through hole The light emitted by the light emitting unit enters the particle-containing environment through the first through hole; the scattered light enters the light processing unit through the second through hole.
  • the computing unit includes a receiving module, an obtaining module, and a computing module; the mobile terminal further includes a storage unit; the receiving module is configured to receive an electrical signal sent by the photoelectric converter; and the acquiring module is configured to use the storage unit Obtaining a conversion coefficient between the preset electrical signal and the particle concentration, and the initial electrical signal, wherein the initial electrical signal is in a environment containing the particulate matter when the light emitting unit does not emit light of a predetermined wavelength Light having the same wavelength as the predetermined wavelength and transmitting the light to the photoelectric converter, the photoelectric converter converting an electric signal obtained according to the light, and storing the electrical signal in a storage unit;
  • the calculation module is configured to calculate a particulate matter concentration of the environment based on the received electrical signal, the initial electrical signal, and the conversion coefficient.
  • the mobile terminal further includes a determining unit, an alarm unit, and a display unit; the determining unit determines whether the calculated dust concentration is greater than a predetermined alarm concentration; and if the predetermined alarm concentration is greater than the predetermined alarm concentration, the alarm unit generates an alarm a signal; the display unit is configured to display the concentration of the particulate matter.
  • the light processing unit can receive the light of the predetermined wavelength and encounter the particulate matter in the environment containing the particulate matter.
  • the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter, and the filter layer filters the light other than the scattered light, so that the photoelectric converter receives only the scattered light and receives the scattering according to the Light generates an electrical signal, which in turn can Calculating the concentration of the particulate matter based on the electrical signal, it can be seen that the particulate matter concentration sensor of the present invention does not require a power device, a matting chamber, or a dark chamber, and greatly reduces the volume of the particulate matter concentration sensor, making the particulate matter concentration sensor more portable and also saving particulate matter concentration. The cost of the sensor is conducive to the popularization and application of the particle concentration sensor.
  • FIG. 1 is a schematic structural view of a first embodiment of a particulate matter concentration sensor of the present invention
  • FIG. 2 is a schematic view showing an angle between an optical axis center line of light received by the light processing unit and a center line of an optical axis of light emitted from the light emitting unit in the first embodiment of the particle concentration sensor of the present invention, which is not equal to 180 degrees.
  • Figure 3 is a schematic view showing the structure of a second embodiment of the particle concentration sensor of the present invention.
  • FIG. 4 is a schematic structural view of a third embodiment of the particulate matter concentration sensor of the present invention.
  • FIG. 5 is a schematic structural diagram of a first embodiment of a mobile terminal according to the present invention.
  • FIG. 6 is a schematic structural diagram of a second embodiment of a mobile terminal according to the present invention.
  • the particulate matter concentration sensor includes a light emitting unit 11 and a light processing unit 12.
  • the optical processing unit 12 includes a filter layer 121 and a photoelectric converter 122.
  • the filter layer 121 is disposed on the photoelectric converter 122, and the filter layer 121 filters and filters the light.
  • the light emitting unit 11 emits light of a predetermined wavelength into a particulate-containing environment, wherein light of a predetermined wavelength encounters the particles, scattering occurs, and scattered light is generated.
  • the particles are irradiated with light, scattering occurs, and the intensity of the scattered light is linear to the concentration of the particles. Therefore, the concentration of the particles can be calculated from the intensity of the scattered light.
  • the particle-containing environment contains two meaning environments, one environment containing particles, such as: atmospheric environment, underground mining environment, etc.; another environment without any particulate matter, if there is no particulate matter in the environment Then, the particle concentration value detected by the particle concentration sensor is zero.
  • the light processing unit 12 is disposed within a range covered by the scattered light, wherein the filter layer 121 transparently transmits the scattered light to the photoelectric converter 122 and filters the light other than the scattered light.
  • the filter layer 121 covers the light receiving port (not shown) of the photoelectric converter 122, so that all the light entering the photoelectric converter 122 needs to be filtered by the filter layer 121.
  • the layer 121 allows only light having a wavelength of a predetermined wavelength to pass through the filter layer 121, and filters light of other wavelengths other than the predetermined wavelength, so that light of other wavelengths other than the predetermined wavelength cannot enter the photoelectric converter 122 through the filter layer 121, thereby making the photoelectric
  • the converter 122 can only receive light of a predetermined wavelength.
  • Filtering layer 121 filters out other light in the particle-containing environment, allowing only light of a predetermined wavelength to pass, preventing the photoelectric converter 122 from receiving light of other wavelengths, affecting subsequent calculation results.
  • the positions of the light emitting unit 11 and the light processing unit 12 may be set such that the angle between the optical axis center line of the light emitted by the light emitting unit 11 and the optical axis center line of the light received by the light processing unit 12 is not equal to 180 degrees, as shown in FIG. 2, the angle between the optical axis center line of the light emitted by the light emitting unit 11 and the optical axis center line of the light received by the light processing unit 12 is ⁇ ⁇ 180 degrees, wherein the optical axis center The angle between the lines is ⁇ 180 degrees to prevent the light processing unit 12 from receiving the scattered light.
  • the particulate sensor also includes a computing unit 13.
  • the photoelectric converter 12 converts the scattered light into an electrical signal and transmits an electrical signal to the computing unit 13.
  • the calculation unit 13 is configured to calculate the concentration of the particulate matter in the environment containing the particulate matter based on the electrical signal. Since the intensity of the scattered light is linear with the concentration of the particles, the scattered light can be converted into an electrical signal, and the concentration of the particles is calculated based on the electrical signal.
  • the light-receiving device 12 of the present invention receives only part of the scattered light, when calculating the concentration of the particulate matter based on the scattered light, the conversion coefficient between the electrical signal and the concentration of the particulate matter can be preset and adjusted by the conversion coefficient.
  • the particulate-containing environment it is also possible to include light of a predetermined wavelength. If the particle-containing environment contains light having a wavelength of a predetermined wavelength, and light having a wavelength of a predetermined wavelength in the particulate-containing environment enters the light processing unit 12, the particulate matter is detected. When the concentration of the particles in the environment is different, the filter layer 121 cannot filter the light having a wavelength of a predetermined wavelength in the environment containing the particles, and the light having a wavelength of a predetermined wavelength in the environment containing the particles affects the calculation result. Therefore, it is necessary to calculate the concentration of the particles.
  • the calculation unit 13 includes a receiving module 131, an obtaining module 132, and a calculating module 133.
  • the particulate sensor further includes a storage unit 14
  • the receiving module 131 receives the electrical signal transmitted by the photoelectric converter.
  • the obtaining module 132 acquires a conversion coefficient between the preset electrical signal and the particle concentration and the initial electrical signal from the storage unit 14, wherein the initial electrical signal is that the filter layer 121 receives the particulate matter when the light emitting unit 11 does not emit light of a predetermined wavelength.
  • the light having the same wavelength as the predetermined wavelength of the environment transmits light to the photoelectric converter 122, and the photoelectric converter 122 converts the obtained electric signal according to the light.
  • the light emitting unit 11 may not be turned on first, and the light processing unit 12 first receives the light having the same wavelength as the predetermined wavelength in the environment containing the particulate matter, and generates an initial electrical signal. And storing the initial electrical signal in the storage unit 14.
  • the light-emitting unit 11 is turned on again, and the light processing unit 12 receives the light containing the particle reflection and the same wavelength in the environment as the predetermined wavelength, and generates a received electrical signal stored in the storage unit 14.
  • the calculation module 133 is configured to calculate the particulate matter concentration of the environment according to the received electrical signal, the initial electrical signal, and the conversion coefficient.
  • the conversion factor can be preset based on historical statistics.
  • the sensor also includes a baffle 15, a housing 16, an input and output unit 17, and a control unit 18.
  • the baffle 15 is disposed between the light emitting unit 11 and the light processing unit 12, wherein the baffle 15 is used to block the light of the predetermined wavelength emitted by the light emitting unit 11 from being directly transmitted to the light processing unit 12, in short, in the light emitting
  • a baffle 15 is disposed between the unit 11 and the light processing unit 12, and the baffle 15 blocks the light emitted by the light emitting unit 11 and directly diffused toward the light processing unit 12, and the baffle 15 restricts the light emitting unit 11 from directly to the light processing unit. 12 emits light.
  • the filter layer 121 filters only light of a wavelength other than the predetermined wavelength, the wavelength of the light emitted by the scattered light and the light-emitting unit 11 is a predetermined wavelength. If the light emitted by the light-emitting unit 11 reaches the filter layer 121 directly, the filter layer 121 This light cannot be filtered out, which in turn affects subsequent calculations. Of course, in other alternative embodiments, the baffle 15 may not be provided.
  • the light emitted by the light emitting unit 11 cannot be directly transmitted to the light processing unit 12, for example:
  • the light emitting unit 11 and the light processing unit 12 are disposed at the same horizontal plane.
  • the particulate matter concentration sensor further includes a collecting lens 23, and the collecting lens 23 is disposed on the light emitting unit. 21, the collecting lens 23 controls the propagation direction of the light emitted by the light emitting unit 21, wherein the collecting lens 23 can collect the light emitted by the light emitting unit 21, or control the light emitted by the light emitting unit 21 to spread the balance thereof.
  • a condensing lens (not shown) may be disposed on the filter layer 221 according to actual conditions, which is not specifically limited herein.
  • the light emitting unit 11, the light processing unit 12, the calculating unit 13, the storage unit 14, the baffle 15, the input and output unit 17, and the control unit 18 are all disposed in the outer casing 16 to protect the light emitting unit 11 and the light processing unit 12 through the outer casing 16.
  • the outer casing 16 is provided with a symmetrical first through hole 161 and a second through hole 162.
  • the first through hole 161 corresponds to the light emitting unit 11
  • the light emitted by the light emitting unit 11 enters the particle containing environment through the first through hole 161
  • the second through hole 162 corresponds to the light processing unit 12
  • the scattered light enters through the second through hole 162 .
  • a symmetrical first groove 361 and second groove 362 may also be disposed on the outer casing 36.
  • the light emitting unit 31 is disposed in the first recess 361
  • the light processing unit 32 is disposed in the second recess 362.
  • the first groove 361 can also serve to define the propagation direction of the light emitted by the light emitting unit 31. Therefore, in the embodiment of the present invention, the baffle can also be directly the outer casing 36.
  • the photoelectric converter 322 is disposed at the bottom of the second recess 362, the filter layer 321 is disposed at an upper portion of the second recess 362, and the filter layer 321 fills the upper space of the second recess 362, so that the filter layer 321 The upper surface is flush with the upper surface of the outer casing 36.
  • the light-emitting unit 31 is disposed at the bottom of the first recess 361.
  • a light-passing layer 311 may also be disposed.
  • the light-passing layer 311 allows light of a predetermined wavelength to pass through, and the light-passing layer 311 fills the first layer.
  • An upper space of a groove 361, and an upper surface of the light-passing layer 311 is flush with an upper surface of the outer casing 36.
  • the control unit 18 is connected to the light emitting unit 11 and the calculating unit 143 for controlling the turning on or off of the light emitting unit 11 and the calculating unit 143, thereby controlling the lighting unit 11 to emit light or the calculating unit to perform processing.
  • the input/output unit 17 is configured to receive the input conversion coefficient and convert the conversion coefficient Stored in the storage unit 14, or the particle concentration output calculated by the calculation module 133, other devices (not shown) may be connected to the input input and output unit 17, and the concentration of the particulate matter outputted by the input and output unit 17 is received, and according to the concentration of the particulate matter. Subsequent processing, for example: display of particulate matter concentration, alarm based on particle concentration, and the like.
  • the light processing unit when the positions of the light emitting unit and the light processing unit are set such that the light emitting unit directly emits light of a predetermined wavelength into the particulate-containing environment, the light processing unit can receive the light of the predetermined wavelength and encounter the particulate matter in the environment containing the particulate matter.
  • the generated scattered light in addition, the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter, and the filter layer filters the light other than the scattered light, so that the photoelectric converter receives only the scattered light and receives the scattering according to the The light generates an electrical signal, and the particle concentration can be calculated according to the electrical signal.
  • the particle concentration sensor of the present invention does not need a power device, a matting chamber, or a dark room, and greatly reduces the volume of the particle concentration sensor, so that the particle concentration sensor It is more portable and saves the cost of the particle concentration sensor, which is beneficial to the popularization and application of the particle concentration sensor.
  • FIG. 5 is a schematic structural diagram of a first embodiment of a mobile terminal according to the present invention.
  • the mobile terminal 40 includes a particulate matter concentration sensor 401.
  • the particle concentration sensor 401 please refer to the above embodiment of the particle concentration sensor, which will not be repeated here.
  • the mobile terminal further includes a receiving processing module (not shown), the receiving processing module is connected to an input and output unit (not shown) in the particulate matter concentration sensor 401, and the receiving processing module receives the concentration of the particulate matter output by the input and output unit, and is performed according to the concentration of the particulate matter.
  • the treatment for example, shows the concentration of the particulate matter, alarms according to the concentration of the particulate matter, and the like.
  • FIG. 6 is a schematic structural diagram of a second embodiment of a mobile terminal according to the present invention.
  • the second embodiment of the mobile terminal is different from the first embodiment of the mobile terminal in that the calculation unit 502, the input and output unit 503, and the storage unit 504 are not disposed in the particulate matter concentration sensor 501, but are disposed in the mobile terminal 50, and the concentration of the particulate matter is
  • the sensor 501 includes only a light emitting unit (not shown) and a light processing unit (not shown), and the calculating unit 502 and the light processing unit in the particulate matter concentration sensor 501 (Fig.
  • the input and output unit 503 and the storage unit 504 please refer to the particle concentration sensor embodiment, which will not be further described herein.
  • other structures of the particle concentration sensor 501 Please also refer to the particle concentration sensor implementation, which will not be repeated here.
  • the mobile terminal 50 further includes a display unit 505, a determining unit 506, and an alarm unit 507.
  • the display unit 505 displays the concentration of the particulate matter calculated by the calculation unit 502.
  • the judging unit 506 judges whether the calculated particulate matter concentration is greater than a predetermined alarm concentration.
  • the alarm unit 507 generates an alarm signal, wherein the alarm signal may be an audible alarm signal, for example, an alarm sound or a text or graphic alarm signal.
  • the display unit 15 can also display an alarm signal, for example, display "particles exceeding the standard, please note", or display a triangle icon and flash a prompt.
  • a three-level alarm may be set, and different alarm signals are generated at different levels, and the difference between the calculated particle concentration and the predetermined alarm concentration is obtained, if the difference is between the first predetermined value and the second predetermined value, or the difference And equal to the first predetermined value, generating a first alarm signal, where the difference is between the second predetermined value and the third predetermined value, or the difference is equal to the second predetermined value, generating a second alarm signal, if the difference is greater than or equal to The third predetermined value generates a third alarm signal.
  • the display unit 505, the determining unit 506, and the alarm unit 507 in the embodiment of the present invention correspond to the receiving processing module in the first embodiment of the mobile terminal.
  • the light processing unit when the positions of the light emitting unit and the light processing unit are set such that the light emitting unit directly emits light of a predetermined wavelength into the particulate-containing environment, the light processing unit can receive the light of the predetermined wavelength and encounter the particulate matter in the environment containing the particulate matter.
  • the generated scattered light in addition, the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter, and the filter layer filters the light other than the scattered light, so that the photoelectric converter receives only the scattered light and receives the scattering according to the The light generates an electrical signal, and the particle concentration can be calculated according to the electrical signal.
  • the particle concentration sensor of the present invention does not need a power device, a matting chamber, or a dark room, and greatly reduces the volume of the particle concentration sensor, so that the particle concentration sensor More portable, also saves the cost of the particle concentration sensor, which is beneficial to particulate matter The promotion and application of concentration sensors.

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Abstract

A particulate matter concentration sensor and mobile terminal are provided. The particulate matter concentration sensor comprises a light emitting unit (11) and an optical processing unit (12) which comprises an optical electrical converter (122) and a filtering layer (121) provided on the optical electrical converter (122). The light emitting unit (11) emits the light with predetermined wavelength into the environment comprising particle matter. The scatter light is generated when the light with predetermined wavelength meets the particle matter and is scattered. The optical processing unit (12) is provided within the range of the scatter light. The scatter light, therein, is transmitted through the filtering layer (121),which filters the light except the scatter light,to the optical electrical converter (122). The optical electrical converter is used to convert the scatter light signal into the electric signal. The size of the particulate matter concentration sensor is greatly reduced by the mentioned structure.

Description

一种颗粒物浓度传感器及移动终端Particle concentration sensor and mobile terminal 【技术领域】[Technical Field]
本发明涉及环境安全检测技术领域，特别涉及一种颗粒物浓度传感器及移动终端。The invention relates to the technical field of environmental safety detection, in particular to a particle concentration sensor and a mobile terminal.
【背景技术】【Background technique】
随着社会的快速发展，环境污染问题越来越严重，若人们长期生活在受污染的环境中，会对人们的身体健康构成严重危害。其中，大气中的颗粒物污染是最常见环境污染之一，过多的颗粒物进行入体的肺部后，会引起各种肺病，例如：矽肺、石棉肺、尘肺等等，若颗粒物中包含有毒属性的金属，还会损害人的大脑、神经、肾脏等等，严重的会直接致人死亡。With the rapid development of society, the problem of environmental pollution is becoming more and more serious. If people live in a polluted environment for a long time, it will seriously harm people's health. Among them, particulate matter pollution in the atmosphere is one of the most common environmental pollution. Excessive particulate matter can cause various lung diseases after entering the lungs, such as silicosis, asbestosis, pneumoconiosis, etc., if the particles contain toxic properties. The metal will also damage the human brain, nerves, kidneys, etc., and it will directly cause death.
空气中颗粒物的浓度越大，人越容易吸入过多颗粒物，对人体的伤害也就越大。为了确保环境中的颗粒物含量不会对人体造成危害，需要对大气中的颗粒物浓度进行检测。The greater the concentration of particulate matter in the air, the easier it is for people to inhale too much particulate matter and the greater the damage to the human body. In order to ensure that the particulate matter content in the environment does not cause harm to the human body, it is necessary to detect the concentration of particulate matter in the atmosphere.
现有技术的颗粒物浓度检测方法包括称重法、震荡天平法、光散射法等等，光散射法又是最常见的测量颗粒物浓度的方法，具体为：将含颗粒物的空气吸入暗室，给暗室里的颗粒物照射光时，产生散射，在颗粒物的物理性质一定的条件下，颗粒物的散射光强度线性于颗粒物的质量浓度，将逐个颗粒物散射光强度转换成脉冲计数或将整块散射光强度转换成电信号即可测出颗粒物的相对质量浓度，再通过预置转换系数，便可直接得到颗粒物质量浓度。The prior art methods for detecting the concentration of particulate matter include weighing method, oscillating balance method, light scattering method, etc., and light scattering method is the most common method for measuring the concentration of particulate matter, specifically: inhaling air containing particulate matter into the darkroom to the darkroom When the particles in the light illuminate the light, scattering occurs. Under the condition that the physical properties of the particles are certain, the scattered light intensity of the particles is linear to the mass concentration of the particles, and the scattered light intensity of the particles is converted into a pulse count or the intensity of the scattered light is converted. The electrical mass signal can measure the relative mass concentration of the particulate matter, and then through the preset conversion coefficient, the mass concentration of the particulate matter can be directly obtained.
目前利用光散射法检测颗粒物浓度的传感器通常需要包括暗室、发光单元、光电转换器、处理单元、抽风单元和光陷阱单元。暗室设置有进气口和出气口，抽风单元与出气口相连，抽风单元启动后，抽出暗室内空气，则暗室的进气口从大气中吸入空气。发光单元、光电转换器、处理单元和光陷阱单元均设置于暗室内，发光单元发射光，照射暗室内空气，并产生散射光，光电转换器接收散射光，并将散射光转换为电信号，处理单元根据电信号计算颗粒物浓度。光 陷阱单元将发光单元发射并且没有产生散射的光消掉。Currently, sensors that use light scattering to detect the concentration of particulate matter generally need to include a darkroom, a light unit, a photoelectric converter, a processing unit, a draft unit, and an optical trap unit. The dark room is provided with an air inlet and an air outlet, and the air blowing unit is connected to the air outlet. After the air blowing unit is started, the air in the dark room is extracted, and the air inlet of the dark room draws in air from the atmosphere. The light emitting unit, the photoelectric converter, the processing unit and the light trap unit are all disposed in the dark room, the light emitting unit emits light, illuminates the dark indoor air, and generates scattered light, the photoelectric converter receives the scattered light, and converts the scattered light into an electrical signal, and processes The unit calculates the particle concentration based on the electrical signal. Light The trap unit emits light that is emitted by the light emitting unit and that does not generate scattering.
综上所述，可知，通过光散射法检测颗粒物浓度的传感器通常需要包括有暗室、抽风单元、光陷阱单元等，而暗室和抽风单元、光陷阱单元通常需要占据一定体积，使得传感器的体积过大，不方便携带，不利推广应用。In summary, it can be seen that a sensor for detecting the concentration of particulate matter by a light scattering method generally needs to include a dark room, a draft unit, a light trap unit, and the like, and the dark room and the exhaust unit, the light trap unit usually need to occupy a certain volume, so that the volume of the sensor is excessive. Large, inconvenient to carry, unfavorable promotion and application.
【发明内容】[Summary of the Invention]
为了至少部分解决以上问题，本发明提出了一种颗粒物浓度传感器，能够大大地缩小颗粒物浓度传感器所占体积。In order to at least partially solve the above problems, the present invention proposes a particle concentration sensor capable of greatly reducing the volume occupied by the particle concentration sensor.
为解决上述技术问题，本发明采用的一个技术方案是：提供一种颗粒物浓度传感器，包括发光单元和光处理单元；In order to solve the above technical problem, a technical solution adopted by the present invention is to provide a particle concentration sensor, comprising a light emitting unit and a light processing unit;
所述光处理单元包括光电转换器和滤波层，所述滤波层设置于所述光电转换器上；所述发光单元向含颗粒物环境中发射预定波长的光，其中，所述预定波长的光遇到颗粒物，发生散射，产生散射光；所述光处理单元设置于所述散射光所覆盖的范围内，其中，所述滤波层向所述光电转换器透传所述散射光，并过滤所述散射光以外的光；所述光电转换器用于将所述散射光转化为电信号，并向所述计算单元发送所述电信号。The light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter; the light emitting unit emits light of a predetermined wavelength into a particle-containing environment, wherein the predetermined wavelength of light meets Scattering occurs to the particulate matter to generate scattered light; the light processing unit is disposed within a range covered by the scattered light, wherein the filter layer transparently transmits the scattered light to the photoelectric converter, and filters the Light other than scattered light; the photoelectric converter is configured to convert the scattered light into an electrical signal and transmit the electrical signal to the computing unit.
其中，所述颗粒物浓度传感器还包括计算单元，所述计算单元用于根据所述电信号，计算所述含颗粒物环境中的颗粒物浓度。Wherein, the particulate matter concentration sensor further comprises a calculating unit, configured to calculate a concentration of the particulate matter in the particulate matter-containing environment according to the electrical signal.
其中，所述散射光的波长为所述预定波长；所述滤波层用于过滤所述预定波长以外的其他波长的光。Wherein the wavelength of the scattered light is the predetermined wavelength; and the filtering layer is configured to filter light of other wavelengths other than the predetermined wavelength.
其中，所述发光单元所发射的光的光轴中心线与所述光处理单元所接收的光的光轴中心线之间的夹角不等于180度。The angle between the optical axis center line of the light emitted by the light emitting unit and the optical axis center line of the light received by the light processing unit is not equal to 180 degrees.
其中，所述颗粒物浓度传感器还包括档板；所述档板设置于所述发光单元与所述光处理单元之间，其中，所述档板用于阻档所述发光单元所发射的光直接传输到所述光处理单元。Wherein, the particulate matter concentration sensor further includes a baffle; the baffle plate is disposed between the light emitting unit and the light processing unit, wherein the baffle plate is used to block the light emitted by the light emitting unit directly Transfer to the light processing unit.
其中，所述颗粒物浓度传感器还包括外壳；所述发光单元、光处理单元、 计算单元和档板均设置于所述外壳内；所述外壳上设置有对称的第一通孔和第二通孔；所述发光单元所发射的光通过第一通孔进入含颗粒物环境；所述散射光通过所述第二通孔进入所述光处理单元。Wherein the particle concentration sensor further comprises a housing; the light emitting unit, the light processing unit, The computing unit and the baffle are disposed in the outer casing; the outer casing is provided with a symmetric first through hole and a second through hole; the light emitted by the light emitting unit enters the particulate matter environment through the first through hole; The scattered light enters the light processing unit through the second through hole.
其中，所述计算单元包括接收模块、获取模块和计算模块；所述颗粒物浓度传感器还包括存储模块、控制模块和输入输出模块；所述接收模块用于接收光电转换器所发送的电信号；所述获取模块用于从存储单元获取预设的电信号与颗粒物浓度之间的转换系数和初始电信号，其中，所述初始电信号为在所述发光单元没有发射预定波长的光时，所述滤波层接收含颗粒物环境中的波长与所述预定波长相同的光，并向所述光电转换器发送所述光，所述光电转换器根据所述光转换得到的电信号，并将所述电信号存储于存储单元；所述计算模块用于根据接收的电信号、初始电信号和转换系数，计算所述含颗粒物环境的颗粒物浓度；所述的控制模块用来控制发光单元发光；所述的输入输出模块用来将转换系数预设于存储单元中，并将计算后颗粒物浓度值输出。The computing unit includes a receiving module, an obtaining module, and a computing module; the particulate matter concentration sensor further includes a storage module, a control module, and an input and output module; the receiving module is configured to receive an electrical signal sent by the photoelectric converter; The obtaining module is configured to obtain, from the storage unit, a conversion coefficient between the preset electrical signal and the particle concentration, and the initial electrical signal, wherein the initial electrical signal is when the light emitting unit does not emit light of a predetermined wavelength, The filter layer receives light having the same wavelength as the predetermined wavelength in a particulate-containing environment, and transmits the light to the photoelectric converter, the photoelectric converter converts the obtained electrical signal according to the light, and the electric The signal is stored in the storage unit; the calculation module is configured to calculate the concentration of the particulate matter in the particulate matter environment according to the received electrical signal, the initial electrical signal, and the conversion coefficient; the control module is configured to control the illumination of the illumination unit; The input/output module is configured to preset the conversion coefficient in the storage unit and output the calculated particle concentration value.
其中，所述颗粒物浓度传感器还包括聚光透镜；所述聚光透镜设置于所述发光单元上。The particle concentration sensor further includes a collecting lens; the collecting lens is disposed on the light emitting unit.
为解决上述技术问题，本发明采用的另一个技术方案是：提供一种移动终端，移动终端包括上述颗粒物浓度传感器。In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a mobile terminal including the above-mentioned particulate matter concentration sensor.
为解决上述技术问题，本发明采用的又一个技术方案是：提供一种移动终端，包括颗粒物浓度传感器和计算单元；所述颗粒物浓度传感器包括发光单元和光处理单元；所述发光单元向含颗粒物环境中发射预定波长的光，其中，所述预定波长的光遇到颗粒物，发生散射，产生散射光；所述光处理单元包括光电转换器和滤波层，所述滤波层设置于所述光电转换器上；所述光处理单元设置于所述散射光所覆盖的范围内，其中，所述滤波层向所述光电转换器透传所述散射光，并过滤所述散射光以外的光；所述光电转换器用于将所述散射光转化为电信号，并向所述计算单元发送所述电信号；所述计算单元用于根据所述电信号，计算所述含颗粒物环境中的颗粒物浓度。 In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a mobile terminal including a particulate matter concentration sensor and a computing unit; the particulate matter concentration sensor includes a light emitting unit and a light processing unit; and the light emitting unit is in a particulate matter environment Transmitting light of a predetermined wavelength, wherein the predetermined wavelength of light encounters particles, scattering occurs to generate scattered light; the light processing unit includes a photoelectric converter and a filter layer, and the filter layer is disposed on the photoelectric converter The light processing unit is disposed within a range covered by the scattered light, wherein the filter layer transparently transmits the scattered light to the photoelectric converter, and filters light other than the scattered light; A photoelectric converter is configured to convert the scattered light into an electrical signal and transmit the electrical signal to the computing unit; the computing unit is configured to calculate a concentration of particulate matter in the particulate-containing environment based on the electrical signal.
其中，所述散射光的波长为所述预定波长；所述滤波层用于过滤所述预定波长以外的其他波长的光；所述发光单元所发射的光的光轴中心线与所述光处理单元所接收的光的光轴中心线之间的夹角不等于180度。Wherein the wavelength of the scattered light is the predetermined wavelength; the filtering layer is configured to filter light of other wavelengths other than the predetermined wavelength; the optical axis center line of the light emitted by the light emitting unit and the light processing The angle between the centerlines of the optical axes of the light received by the unit is not equal to 180 degrees.
其中，所述颗粒物浓度传感器还包括档板；所述档板设置于所述发光单元与所述光处理单元之间，其中，所述档板用于阻档所述发光单元所发射的光直接传输达到所述光处理单元和滤波层。Wherein, the particulate matter concentration sensor further includes a baffle; the baffle plate is disposed between the light emitting unit and the light processing unit, wherein the baffle plate is used to block the light emitted by the light emitting unit directly The transmission reaches the optical processing unit and the filter layer.
其中，所述颗粒物浓度传感器还包括外壳；所述发光单元、光处理单元、计算单元和档板均设置于所述外壳内；所述外壳上设置有对称的第一通孔和第二通孔；所述发光单元所发射的光通过第一通孔进入含颗粒物环境；所述散射光通过所述第二通孔进入所述光处理单元。Wherein the particle concentration sensor further comprises a casing; the lighting unit, the light processing unit, the calculating unit and the baffle are disposed in the casing; the casing is provided with a symmetric first through hole and a second through hole The light emitted by the light emitting unit enters the particle-containing environment through the first through hole; the scattered light enters the light processing unit through the second through hole.
其中，所述计算单元包括接收模块、获取模块和计算模块；所述移动终端还包括存储单元；所述接收模块用于接收光电转换器所发送的电信号；所述获取模块用于从存储单元获取预设的电信号与颗粒物浓度之间的转换系数和初始电信号，其中，所述初始电信号为在所述发光单元没有发射预定波长的光时，所述滤波层接收含颗粒物环境中的波长与所述预定波长相同的光，并向所述光电转换器发送所述光，所述光电转换器根据所述光转换得到的电信号，并将所述电信号存储于存储单元；所述计算模块用于根据接收的电信号、初始电信号和转换系数，计算所述环境的颗粒物浓度。The computing unit includes a receiving module, an obtaining module, and a computing module; the mobile terminal further includes a storage unit; the receiving module is configured to receive an electrical signal sent by the photoelectric converter; and the acquiring module is configured to use the storage unit Obtaining a conversion coefficient between the preset electrical signal and the particle concentration, and the initial electrical signal, wherein the initial electrical signal is in a environment containing the particulate matter when the light emitting unit does not emit light of a predetermined wavelength Light having the same wavelength as the predetermined wavelength and transmitting the light to the photoelectric converter, the photoelectric converter converting an electric signal obtained according to the light, and storing the electrical signal in a storage unit; The calculation module is configured to calculate a particulate matter concentration of the environment based on the received electrical signal, the initial electrical signal, and the conversion coefficient.
其中，所述移动终端还包括判断单元、报警单元和显示单元；所述判断单元判断所述计算得到的粉尘浓度是否大于预定报警浓度；若大于所述预定报警浓度，则所述报警单元生成报警信号；所述显示单元用于显示所述颗粒物浓度。The mobile terminal further includes a determining unit, an alarm unit, and a display unit; the determining unit determines whether the calculated dust concentration is greater than a predetermined alarm concentration; and if the predetermined alarm concentration is greater than the predetermined alarm concentration, the alarm unit generates an alarm a signal; the display unit is configured to display the concentration of the particulate matter.
在本发明实施方式中，设置发光单元和光处理单元的位置，使得发光单元直接向含颗粒物环境中发射预定波长的光时，光处理单元能够接收预定波长的光遇到含颗粒物环境中的颗粒物所产生的散射光，另外，光处理单元包括光电转换器和滤波层，滤波层设置于光电转换器上，滤波层过滤散射光以外的光，从而使得光电转换器仅接收散射光，并根据接收散射光生成电信号，进而可以 根据电信号计算颗粒物浓度，由此可知，本发明的颗粒物浓度传感器并不需要动力装置、消光室，也无需要暗室，大大缩小颗粒物浓度传感器的体积，使得颗粒物浓度传感器更加便携，也节省颗粒物浓度传感器的成本，有利于颗粒物浓度传感器的推广应用。In an embodiment of the present invention, when the positions of the light emitting unit and the light processing unit are set such that the light emitting unit directly emits light of a predetermined wavelength into the particulate-containing environment, the light processing unit can receive the light of the predetermined wavelength and encounter the particulate matter in the environment containing the particulate matter. The generated scattered light, in addition, the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter, and the filter layer filters the light other than the scattered light, so that the photoelectric converter receives only the scattered light and receives the scattering according to the Light generates an electrical signal, which in turn can Calculating the concentration of the particulate matter based on the electrical signal, it can be seen that the particulate matter concentration sensor of the present invention does not require a power device, a matting chamber, or a dark chamber, and greatly reduces the volume of the particulate matter concentration sensor, making the particulate matter concentration sensor more portable and also saving particulate matter concentration. The cost of the sensor is conducive to the popularization and application of the particle concentration sensor.
【附图说明】[Description of the Drawings]
图1是本发明颗粒物浓度传感器第一实施方式的结构示意图；1 is a schematic structural view of a first embodiment of a particulate matter concentration sensor of the present invention;
图2是本发明颗粒物浓度传感器第一实施方式中光处理单元所接收的光的光轴中心线与发光单元所发射的光的光轴的中心线之间的夹角不等于180度的示意图。2 is a schematic view showing an angle between an optical axis center line of light received by the light processing unit and a center line of an optical axis of light emitted from the light emitting unit in the first embodiment of the particle concentration sensor of the present invention, which is not equal to 180 degrees.
图3是本发明颗粒物浓度传感器第二实施方式的结构示意图；Figure 3 is a schematic view showing the structure of a second embodiment of the particle concentration sensor of the present invention;
图4是本发明颗粒物浓度传感器第三实施方式的结构示意图；4 is a schematic structural view of a third embodiment of the particulate matter concentration sensor of the present invention;
图5是本发明移动终端第一实施方式的结构示意图；5 is a schematic structural diagram of a first embodiment of a mobile terminal according to the present invention;
图6是本发明移动终端第二实施方式的结构示意图。FIG. 6 is a schematic structural diagram of a second embodiment of a mobile terminal according to the present invention.
【具体实施方式】【detailed description】
下面结合附图和实施方式对本发明进行详细说明。The invention will now be described in detail in conjunction with the drawings and embodiments.
请参阅图1，颗粒物浓度传感器包括发光单元11和光处理单元12。光处理单元12包括滤波层121和光电转换器122，其中，滤波层121设置在光电转换器122上，滤波层121对光进行过滤、筛选。Referring to FIG. 1, the particulate matter concentration sensor includes a light emitting unit 11 and a light processing unit 12. The optical processing unit 12 includes a filter layer 121 and a photoelectric converter 122. The filter layer 121 is disposed on the photoelectric converter 122, and the filter layer 121 filters and filters the light.
发光单元11向含颗粒物环境中发射预定波长的光，其中，预定波长的光遇到颗粒物，发生散射，产生散射光。向颗粒物照射光时，会产生散射，散射光强度线性于颗粒物的浓度，因此，可以根据散射光强度计算颗粒物的浓度。需要说明的是：含颗粒物环境包含两种意义环境，一种真实含有颗粒物的环境，例如：大气环境、地下矿区环境等等；另一种没有包含任何颗粒物的环境，若环境中没有任何颗粒物时，则颗粒物浓度传感器检测得到的颗粒物浓度值为零。 The light emitting unit 11 emits light of a predetermined wavelength into a particulate-containing environment, wherein light of a predetermined wavelength encounters the particles, scattering occurs, and scattered light is generated. When the particles are irradiated with light, scattering occurs, and the intensity of the scattered light is linear to the concentration of the particles. Therefore, the concentration of the particles can be calculated from the intensity of the scattered light. It should be noted that the particle-containing environment contains two meaning environments, one environment containing particles, such as: atmospheric environment, underground mining environment, etc.; another environment without any particulate matter, if there is no particulate matter in the environment Then, the particle concentration value detected by the particle concentration sensor is zero.
光处理单元12设置于散射光所覆盖范围内，其中，滤波层121向光电转换器122透传散射光，并过滤散射光以外的光。具体的，滤波层121覆盖光电转换器122的光接收口(图未示)，使所有进入光电转换器122的光均需要经过滤波层121进行过滤。发光单元11发射的光遇到颗粒物时，会产生散射，变成散射光，其中，散射光的波长与发光单元11发射的光的波长相同，因此，散射光的波长也为预设波长，滤波层121仅允许波长为预定波长的光通过滤波层121，并且过滤预定波长以外的其他波长的光，使得预定波长以外的其他波长的光不能够通过滤波层121进入光电转换器122，从而使得光电转换器122只能接收预定波长的光。通过滤波层121过滤掉含颗粒物环境中其他光，仅允许波长为预定波长的光通过，避免光电转换器122接收到其他波长的光，影响后续的计算结果。The light processing unit 12 is disposed within a range covered by the scattered light, wherein the filter layer 121 transparently transmits the scattered light to the photoelectric converter 122 and filters the light other than the scattered light. Specifically, the filter layer 121 covers the light receiving port (not shown) of the photoelectric converter 122, so that all the light entering the photoelectric converter 122 needs to be filtered by the filter layer 121. When the light emitted by the light-emitting unit 11 encounters the particulate matter, scattering occurs and becomes scattered light, wherein the wavelength of the scattered light is the same as the wavelength of the light emitted by the light-emitting unit 11, and therefore, the wavelength of the scattered light is also a preset wavelength, and filtering The layer 121 allows only light having a wavelength of a predetermined wavelength to pass through the filter layer 121, and filters light of other wavelengths other than the predetermined wavelength, so that light of other wavelengths other than the predetermined wavelength cannot enter the photoelectric converter 122 through the filter layer 121, thereby making the photoelectric The converter 122 can only receive light of a predetermined wavelength. Filtering layer 121 filters out other light in the particle-containing environment, allowing only light of a predetermined wavelength to pass, preventing the photoelectric converter 122 from receiving light of other wavelengths, affecting subsequent calculation results.
进一步的，还可设置发光单元11和光处理单元12的位置，使得发光单元11所发射的光的光轴中心线与光处理单元12所接收的光的光轴中心线之间的夹角不等于180度，如图2所示，发光单元11所发射的光的光轴中心线与光处理单元12所接收的光的光轴中心线之间的夹角β≠180度，其中，光轴中心线之间的夹角β≠180度，避免光处理单元12接收不到散射光的情况。Further, the positions of the light emitting unit 11 and the light processing unit 12 may be set such that the angle between the optical axis center line of the light emitted by the light emitting unit 11 and the optical axis center line of the light received by the light processing unit 12 is not equal to 180 degrees, as shown in FIG. 2, the angle between the optical axis center line of the light emitted by the light emitting unit 11 and the optical axis center line of the light received by the light processing unit 12 is β ≠ 180 degrees, wherein the optical axis center The angle between the lines is β≠180 degrees to prevent the light processing unit 12 from receiving the scattered light.
颗粒物传感器还包括计算单元13。光电转换器12将散射光转化为电信号，并向计算单元13发送电信号。计算单元13用于根据电信号，计算含颗粒物环境中的颗粒物浓度。由于散射光的强度与颗粒物浓度成线性，因此，可以将散射光转换为电信号，再根据电信号计算颗粒物浓度。The particulate sensor also includes a computing unit 13. The photoelectric converter 12 converts the scattered light into an electrical signal and transmits an electrical signal to the computing unit 13. The calculation unit 13 is configured to calculate the concentration of the particulate matter in the environment containing the particulate matter based on the electrical signal. Since the intensity of the scattered light is linear with the concentration of the particles, the scattered light can be converted into an electrical signal, and the concentration of the particles is calculated based on the electrical signal.
另外，由于本发明的光接收装置12只是接收到部份散射光，在根据散射光计算颗粒物的浓度时，可以预设电信号与颗粒物浓度之间的转换系数，通过转换系数进行调节。Further, since the light-receiving device 12 of the present invention receives only part of the scattered light, when calculating the concentration of the particulate matter based on the scattered light, the conversion coefficient between the electrical signal and the concentration of the particulate matter can be preset and adjusted by the conversion coefficient.
进一步的，含颗粒物环境中也有可能包含预定波长的光，若含颗粒物环境中含有波长为预定波长的光，并且含颗粒物环境中波长为预定波长的光进入光处理单元12，则在检测含颗粒物环境中颗粒物浓度时，而滤波层121无法过滤含颗粒物环境中的波长为预定波长的光，含颗粒物环境中的波长为预定波长的光会对计算结果产生影响，因此，在计算颗粒物浓度还需要去掉含颗粒物环境 中的波长为预定波长的光所造成的影响，则计算单元13包括接收模块131、获取模块132和计算模块133。颗粒物传感器还包括存储单元14Further, in the particulate-containing environment, it is also possible to include light of a predetermined wavelength. If the particle-containing environment contains light having a wavelength of a predetermined wavelength, and light having a wavelength of a predetermined wavelength in the particulate-containing environment enters the light processing unit 12, the particulate matter is detected. When the concentration of the particles in the environment is different, the filter layer 121 cannot filter the light having a wavelength of a predetermined wavelength in the environment containing the particles, and the light having a wavelength of a predetermined wavelength in the environment containing the particles affects the calculation result. Therefore, it is necessary to calculate the concentration of the particles. Remove the particulate matter environment The calculation unit 13 includes a receiving module 131, an obtaining module 132, and a calculating module 133. The particulate sensor further includes a storage unit 14
接收模块131接收光电转换器所发送的电信号。获取模块132从存储单元14获取预设的电信号与颗粒物浓度之间的转换系数和初始电信号，其中，初始电信号为在发光单元11没有发射预定波长的光时，滤波层121接收含颗粒物环境的波长与预定波长相同的光，并向光电转换器122发送光，光电转换器122根据光转换得到的电信号。具体而言，在需要检测某一含颗粒物环境中的颗粒物浓度时，可以先不开启发光单元11，先使光处理单元12接收含颗粒物环境中波长与预定波长相同的光，并生成初始电信号，以及将初始电信号存储于存储单元14，。再开启发光单元11，使光处理单元12接收含颗粒物反射及环境中波长与预定波长相同的光，并生成接收电信号存储于存储单元14。The receiving module 131 receives the electrical signal transmitted by the photoelectric converter. The obtaining module 132 acquires a conversion coefficient between the preset electrical signal and the particle concentration and the initial electrical signal from the storage unit 14, wherein the initial electrical signal is that the filter layer 121 receives the particulate matter when the light emitting unit 11 does not emit light of a predetermined wavelength. The light having the same wavelength as the predetermined wavelength of the environment transmits light to the photoelectric converter 122, and the photoelectric converter 122 converts the obtained electric signal according to the light. Specifically, when it is required to detect the concentration of the particulate matter in a certain particulate matter environment, the light emitting unit 11 may not be turned on first, and the light processing unit 12 first receives the light having the same wavelength as the predetermined wavelength in the environment containing the particulate matter, and generates an initial electrical signal. And storing the initial electrical signal in the storage unit 14. The light-emitting unit 11 is turned on again, and the light processing unit 12 receives the light containing the particle reflection and the same wavelength in the environment as the predetermined wavelength, and generates a received electrical signal stored in the storage unit 14.
计算模块133用于根据接收的电信号、初始电信号和转换系数，计算环境的颗粒物浓度。转换系数可以根据历史统计数据预先设定。其中，根据电信号计算颗粒物浓度的公式如下：(接收电信号－初始电信号)×转换系数＝颗粒物浓度The calculation module 133 is configured to calculate the particulate matter concentration of the environment according to the received electrical signal, the initial electrical signal, and the conversion coefficient. The conversion factor can be preset based on historical statistics. Wherein, the formula for calculating the concentration of the particulate matter based on the electrical signal is as follows: (received electrical signal - initial electrical signal) × conversion coefficient = particle concentration
传感器还包括档板15、外壳16、、输入输出单元17和控制单元18。档板15设置于发光单元11与光处理单元12之间，其中，档板15用于阻档发光单元11所发射的预定波长的光直接传输到光处理单元12，简而言之，在发光单元11和光处理单元12之间设置档板15，档板15遮档发光单元11所发射的并且直接向光处理单元12扩散的光，相当于，档板15限制发光单元11直接向光处理单元12发射光。由于，滤波层121仅过滤预定波长以外波长的光，散射光和发光单元11所发射的光的波长均为预定波长，若发光单元11所发射的光直接到达到滤波层121，则滤波层121无法把该光过滤掉，进而影响到后续的计算结果。当然，在其他替代实施方式中，也可不设置档板15，通过适当设置发光单元11和光处理单元12的相对位置，进而使得发光单元11所发射的光无法直接传输到达光处理单元12，例如：将发光单元11和光处理单元12设置在同一水平面， 发光单元11所发射的光垂直于该水平面；又或者，限定发光单元11所发射的光的方向，如图3所示，颗粒物浓度传感器还包括聚光透镜23，聚光透镜23设置于发光单元21上，聚光透镜23控制发光单元21所发射的光的传播方向，其中，聚光透镜23可聚集发光单元21所发射的光，或者，控制发光单元21所发射的光，以其平衡传播，当然，也可根据实际情况，在滤波层221上设置聚光透镜(图未示)，此处不再具体限定。The sensor also includes a baffle 15, a housing 16, an input and output unit 17, and a control unit 18. The baffle 15 is disposed between the light emitting unit 11 and the light processing unit 12, wherein the baffle 15 is used to block the light of the predetermined wavelength emitted by the light emitting unit 11 from being directly transmitted to the light processing unit 12, in short, in the light emitting A baffle 15 is disposed between the unit 11 and the light processing unit 12, and the baffle 15 blocks the light emitted by the light emitting unit 11 and directly diffused toward the light processing unit 12, and the baffle 15 restricts the light emitting unit 11 from directly to the light processing unit. 12 emits light. Since the filter layer 121 filters only light of a wavelength other than the predetermined wavelength, the wavelength of the light emitted by the scattered light and the light-emitting unit 11 is a predetermined wavelength. If the light emitted by the light-emitting unit 11 reaches the filter layer 121 directly, the filter layer 121 This light cannot be filtered out, which in turn affects subsequent calculations. Of course, in other alternative embodiments, the baffle 15 may not be provided. By appropriately setting the relative positions of the light emitting unit 11 and the light processing unit 12, the light emitted by the light emitting unit 11 cannot be directly transmitted to the light processing unit 12, for example: The light emitting unit 11 and the light processing unit 12 are disposed at the same horizontal plane. The light emitted by the light emitting unit 11 is perpendicular to the horizontal plane; or alternatively, the direction of the light emitted by the light emitting unit 11 is defined. As shown in FIG. 3, the particulate matter concentration sensor further includes a collecting lens 23, and the collecting lens 23 is disposed on the light emitting unit. 21, the collecting lens 23 controls the propagation direction of the light emitted by the light emitting unit 21, wherein the collecting lens 23 can collect the light emitted by the light emitting unit 21, or control the light emitted by the light emitting unit 21 to spread the balance thereof. Of course, a condensing lens (not shown) may be disposed on the filter layer 221 according to actual conditions, which is not specifically limited herein.
发光单元11、光处理单元12、计算单元13、存储单元14、档板15、输入输出单元17和控制单元18均设置于外壳16内，以通过外壳16保护发光单元11、光处理单元12、计算单元13、存储单元14、档板15、输入输出单元17和控制单元18。外壳16设置有对称的第一通孔161和第二通孔162。第一通孔161与发光单元11对应，发光单元11所发射的光通过第一通孔161进入含颗粒物环境，第二通孔162与光处理单元12对应，散射光通过第二通孔162进入光处理单元12。The light emitting unit 11, the light processing unit 12, the calculating unit 13, the storage unit 14, the baffle 15, the input and output unit 17, and the control unit 18 are all disposed in the outer casing 16 to protect the light emitting unit 11 and the light processing unit 12 through the outer casing 16. The calculation unit 13, the storage unit 14, the shutter 15, the input and output unit 17, and the control unit 18. The outer casing 16 is provided with a symmetrical first through hole 161 and a second through hole 162. The first through hole 161 corresponds to the light emitting unit 11 , the light emitted by the light emitting unit 11 enters the particle containing environment through the first through hole 161 , the second through hole 162 corresponds to the light processing unit 12 , and the scattered light enters through the second through hole 162 . Light processing unit 12.
在其他替代实施方式中，如图4所示，外壳36上也可以设置相对称的第一凹槽361和第二凹槽362。发光单元31设置在第一凹槽361内，光处理单元32设置在第二凹槽362内。其中，第一凹槽361也能够起到限定发光单元31所发射的光的传播方向，因此，在本发明实施方式中，档板也可以直接为外壳36。其中，光电转换器322设置于第二凹槽362内的底部，滤波层321设置于第二凹槽362内的上部，并且滤波层321填充第二凹槽362的上部空间，使得滤波层321的上表面与外壳36的上表面齐平。发光单元31设置于第一凹槽361的底部，在第一凹槽361的上部空间，也可设置通光层311，其中，通光层311允许预定波长的光通过，通光层311填充第一凹槽361的上部空间，并且通光层311的上表面与外壳36的上表面齐平。In other alternative embodiments, as shown in FIG. 4, a symmetrical first groove 361 and second groove 362 may also be disposed on the outer casing 36. The light emitting unit 31 is disposed in the first recess 361, and the light processing unit 32 is disposed in the second recess 362. The first groove 361 can also serve to define the propagation direction of the light emitted by the light emitting unit 31. Therefore, in the embodiment of the present invention, the baffle can also be directly the outer casing 36. The photoelectric converter 322 is disposed at the bottom of the second recess 362, the filter layer 321 is disposed at an upper portion of the second recess 362, and the filter layer 321 fills the upper space of the second recess 362, so that the filter layer 321 The upper surface is flush with the upper surface of the outer casing 36. The light-emitting unit 31 is disposed at the bottom of the first recess 361. In the upper space of the first recess 361, a light-passing layer 311 may also be disposed. The light-passing layer 311 allows light of a predetermined wavelength to pass through, and the light-passing layer 311 fills the first layer. An upper space of a groove 361, and an upper surface of the light-passing layer 311 is flush with an upper surface of the outer casing 36.
控制单元18连接发光单元11和计算单元143，控制单元18用于控制发光单元11和计算单元143的开启或者关闭，从而控制发光单元11发光或者计算单元进行处理。输入输入输出单元17用来接收输入的转换系数，并将转换系数 存储于存储单元14，或者，将计算模块133计算得到的颗粒物浓度输出，其他设备(图未示)可以连接输入输入输出单元17，并通过接收输入输出单元17输出的颗粒物浓度，以及根据颗粒物浓度进行后续处理，例如：显示颗粒物浓度、根据颗粒物浓度进行报警等等。The control unit 18 is connected to the light emitting unit 11 and the calculating unit 143 for controlling the turning on or off of the light emitting unit 11 and the calculating unit 143, thereby controlling the lighting unit 11 to emit light or the calculating unit to perform processing. The input/output unit 17 is configured to receive the input conversion coefficient and convert the conversion coefficient Stored in the storage unit 14, or the particle concentration output calculated by the calculation module 133, other devices (not shown) may be connected to the input input and output unit 17, and the concentration of the particulate matter outputted by the input and output unit 17 is received, and according to the concentration of the particulate matter. Subsequent processing, for example: display of particulate matter concentration, alarm based on particle concentration, and the like.
在本发明实施方式中，设置发光单元和光处理单元的位置，使得发光单元直接向含颗粒物环境中发射预定波长的光时，光处理单元能够接收预定波长的光遇到含颗粒物环境中的颗粒物所产生的散射光，另外，光处理单元包括光电转换器和滤波层，滤波层设置于光电转换器上，滤波层过滤散射光以外的光，从而使得光电转换器仅接收散射光，并根据接收散射光生成电信号，进而可以根据电信号计算颗粒物浓度，由此可知，本发明的颗粒物浓度传感器并不需要动力装置、消光室，也无需要暗室，大大缩小颗粒物浓度传感器的体积，使得颗粒物浓度传感器更加便携，也节省颗粒物浓度传感器的成本，有利于颗粒物浓度传感器的推广应用。In an embodiment of the present invention, when the positions of the light emitting unit and the light processing unit are set such that the light emitting unit directly emits light of a predetermined wavelength into the particulate-containing environment, the light processing unit can receive the light of the predetermined wavelength and encounter the particulate matter in the environment containing the particulate matter. The generated scattered light, in addition, the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter, and the filter layer filters the light other than the scattered light, so that the photoelectric converter receives only the scattered light and receives the scattering according to the The light generates an electrical signal, and the particle concentration can be calculated according to the electrical signal. Therefore, the particle concentration sensor of the present invention does not need a power device, a matting chamber, or a dark room, and greatly reduces the volume of the particle concentration sensor, so that the particle concentration sensor It is more portable and saves the cost of the particle concentration sensor, which is beneficial to the popularization and application of the particle concentration sensor.
本发明还提供移动终端实施方式。请参阅图5，图5是本发明移动终端第一实施方式的结构示意图。移动终端40包括颗粒物浓度传感器401。其中，颗粒物浓度传感器401的具体结构，请参阅图上述颗粒物浓度传感器实施方式，此处不再一一赘述。The present invention also provides a mobile terminal implementation. Please refer to FIG. 5. FIG. 5 is a schematic structural diagram of a first embodiment of a mobile terminal according to the present invention. The mobile terminal 40 includes a particulate matter concentration sensor 401. For the specific structure of the particle concentration sensor 401, please refer to the above embodiment of the particle concentration sensor, which will not be repeated here.
移动终端还包括接收处理模块(图未示)，接收处理模块连接颗粒物浓度传感器401中的输入输出单元(图未示)，接收处理模块接收输入输出单元所输出的颗粒物浓度，并根据颗粒物浓度进行处理，例如：显示颗粒物浓度、根据颗粒物浓度进行报警等等。The mobile terminal further includes a receiving processing module (not shown), the receiving processing module is connected to an input and output unit (not shown) in the particulate matter concentration sensor 401, and the receiving processing module receives the concentration of the particulate matter output by the input and output unit, and is performed according to the concentration of the particulate matter. The treatment, for example, shows the concentration of the particulate matter, alarms according to the concentration of the particulate matter, and the like.
请参阅图6，图6是本发明移动终端的第二实施方式的结构示意图。移动终端的第二实施方式与移动终端第一实施方式不同之处在于：计算单元502、输入输出单元503和存储单元504不是设置于颗粒物浓度传感器501内，而是设置移动终端50内，颗粒物浓度传感器501仅包括光发射单元(图未示)和光处理单元(图未示)，计算单元502与颗粒物浓度传感器501内的光处理单元(图未 示)连接，而计算单元502、输入输出单元503和存储单元504所执行的操作和具体结构，请参阅颗粒物浓度传感器实施方式，此处不再一一赘述，另外，颗粒物浓度传感器501的其他结构，也请参阅颗粒物浓度传感器实施方式，此处不再一一赘述。Please refer to FIG. 6. FIG. 6 is a schematic structural diagram of a second embodiment of a mobile terminal according to the present invention. The second embodiment of the mobile terminal is different from the first embodiment of the mobile terminal in that the calculation unit 502, the input and output unit 503, and the storage unit 504 are not disposed in the particulate matter concentration sensor 501, but are disposed in the mobile terminal 50, and the concentration of the particulate matter is The sensor 501 includes only a light emitting unit (not shown) and a light processing unit (not shown), and the calculating unit 502 and the light processing unit in the particulate matter concentration sensor 501 (Fig. For the operation and specific structure of the calculation unit 502, the input and output unit 503 and the storage unit 504, please refer to the particle concentration sensor embodiment, which will not be further described herein. In addition, other structures of the particle concentration sensor 501 Please also refer to the particle concentration sensor implementation, which will not be repeated here.
进一步的，移动终端50还包括显示单元505、判断单元506和报警单元507。显示单元505显示计算单元502计算得到的颗粒物浓度。判断单元506判断计算得到的颗粒物浓度是否大于预定报警浓度。在判断单元506判断到计算得到的颗粒物浓度大于预定报警浓度时，报警单元507生成报警信号，其中，报警信号可为声音报警信号，例如：发出警报声，也可以为文字或者图形报警信号，则显示单元15还可以显示报警信号，例如：显示“颗粒物超标，请注意”，或者显示三角形的图标，并进行闪烁提示。进一步的，还可设置三级报警，不同级别生成不同报警信号，则获取计算得到的颗粒物浓度与预定报警浓度之差，若差值位于第一预定值与第二预定值之间，或者差值等于第一预定值，则生成第一报警信号，差值位于第二预定值与第三预定值之间，或者差值等于第二预定值，则生成第二报警信号，若差值大于或者等于第三预定值，则生成第三报警信号。Further, the mobile terminal 50 further includes a display unit 505, a determining unit 506, and an alarm unit 507. The display unit 505 displays the concentration of the particulate matter calculated by the calculation unit 502. The judging unit 506 judges whether the calculated particulate matter concentration is greater than a predetermined alarm concentration. When the determining unit 506 determines that the calculated particulate matter concentration is greater than the predetermined alarm concentration, the alarm unit 507 generates an alarm signal, wherein the alarm signal may be an audible alarm signal, for example, an alarm sound or a text or graphic alarm signal. The display unit 15 can also display an alarm signal, for example, display "particles exceeding the standard, please note", or display a triangle icon and flash a prompt. Further, a three-level alarm may be set, and different alarm signals are generated at different levels, and the difference between the calculated particle concentration and the predetermined alarm concentration is obtained, if the difference is between the first predetermined value and the second predetermined value, or the difference And equal to the first predetermined value, generating a first alarm signal, where the difference is between the second predetermined value and the third predetermined value, or the difference is equal to the second predetermined value, generating a second alarm signal, if the difference is greater than or equal to The third predetermined value generates a third alarm signal.
需要说明的是：本发明实施方式中的显示单元505、判断单元506和报警单元507相当于移动终端第一实施方式中接收处理模块。It should be noted that the display unit 505, the determining unit 506, and the alarm unit 507 in the embodiment of the present invention correspond to the receiving processing module in the first embodiment of the mobile terminal.
在本发明实施方式中，设置发光单元和光处理单元的位置，使得发光单元直接向含颗粒物环境中发射预定波长的光时，光处理单元能够接收预定波长的光遇到含颗粒物环境中的颗粒物所产生的散射光，另外，光处理单元包括光电转换器和滤波层，滤波层设置于光电转换器上，滤波层过滤散射光以外的光，从而使得光电转换器仅接收散射光，并根据接收散射光生成电信号，进而可以根据电信号计算颗粒物浓度，由此可知，本发明的颗粒物浓度传感器并不需要动力装置、消光室，也无需要暗室，大大缩小颗粒物浓度传感器的体积，使得颗粒物浓度传感器更加便携，也节省颗粒物浓度传感器的成本，有利于颗粒物 浓度传感器的推广应用。In an embodiment of the present invention, when the positions of the light emitting unit and the light processing unit are set such that the light emitting unit directly emits light of a predetermined wavelength into the particulate-containing environment, the light processing unit can receive the light of the predetermined wavelength and encounter the particulate matter in the environment containing the particulate matter. The generated scattered light, in addition, the light processing unit includes a photoelectric converter and a filter layer, the filter layer is disposed on the photoelectric converter, and the filter layer filters the light other than the scattered light, so that the photoelectric converter receives only the scattered light and receives the scattering according to the The light generates an electrical signal, and the particle concentration can be calculated according to the electrical signal. Therefore, the particle concentration sensor of the present invention does not need a power device, a matting chamber, or a dark room, and greatly reduces the volume of the particle concentration sensor, so that the particle concentration sensor More portable, also saves the cost of the particle concentration sensor, which is beneficial to particulate matter The promotion and application of concentration sensors.
以上所述仅为本发明的实施方式，并非因此限制本发明的专利范围，凡是利用本发明说明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。 The above is only the embodiment of the present invention, and is not intended to limit the scope of the invention, and the equivalent structure or equivalent process transformations made by the description of the invention and the drawings are directly or indirectly applied to other related technologies. The fields are all included in the scope of patent protection of the present invention.

Claims (15)

  1. 一种颗粒物浓度传感器，其特征在于，包括发光单元和光处理单元；A particle concentration sensor, comprising: a light emitting unit and a light processing unit;
    所述光处理单元包括光电转换器和滤波层，所述滤波层设置于所述光电转换器上；The light processing unit includes a photoelectric converter and a filter layer, and the filter layer is disposed on the photoelectric converter;
    所述发光单元向含颗粒物环境中发射预定波长的光，其中，所述预定波长的光遇到颗粒物，发生散射，产生散射光；The light emitting unit emits light of a predetermined wavelength into a particle-containing environment, wherein the predetermined wavelength of light encounters particles, scattering occurs, and generating scattered light;
    所述光处理单元设置于所述散射光所覆盖的范围内，其中，所述滤波层向所述光电转换器透传所述散射光，并过滤所述散射光以外的光；The light processing unit is disposed within a range covered by the scattered light, wherein the filter layer transparently transmits the scattered light to the photoelectric converter, and filters light other than the scattered light;
    所述光电转换器用于将所述散射光转化为电信号，并向所述计算单元发送所述电信号。The photoelectric converter is configured to convert the scattered light into an electrical signal and transmit the electrical signal to the computing unit.
  2. 根据权利要求1所述的颗粒物浓度传感器，其特征在于，所述传感器还包括计算单元，所述计算单元用于根据所述电信号，计算所述含颗粒物环境中的颗粒物浓度。The particulate matter concentration sensor according to claim 1, wherein the sensor further comprises a calculation unit for calculating a concentration of the particulate matter in the particulate matter-containing environment based on the electrical signal.
  3. 根据权利要求2所述的颗粒物浓度传感器，其特征在于，The particulate matter concentration sensor according to claim 2, wherein
    所述散射光的波长为所述预定波长；The wavelength of the scattered light is the predetermined wavelength;
    所述滤波层用于过滤所述预定波长以外的其他波长的光。The filter layer is configured to filter light of other wavelengths than the predetermined wavelength.
  4. 根据权利要求2所述的颗粒物浓度传感器，其特征在于，The particulate matter concentration sensor according to claim 2, wherein
    所述发光单元所发射的光的光轴中心线与所述光处理单元所接收的光的光轴中心线之间的夹角不等于180度。The angle between the optical axis center line of the light emitted by the light emitting unit and the optical axis center line of the light received by the light processing unit is not equal to 180 degrees.
  5. 根据权利要求2～4中任意一项所述的颗粒物浓度传感器，其特征在于，The particulate matter concentration sensor according to any one of claims 2 to 4, wherein
    所述颗粒物浓度传感器还包括档板；The particulate matter concentration sensor further includes a baffle;
    所述档板设置于所述发光单元与所述光处理单元之间，其中，所述档板用于阻档所述发光单元所发射的光直接传输到所光处理单元。The baffle is disposed between the light emitting unit and the light processing unit, wherein the baffle is configured to block light emitted by the light emitting unit from being directly transmitted to the light processing unit.
  6. 根据权利要求5所述的颗粒物浓度传感器，其特征在于，所述颗粒物浓度传感器还包括外壳； The particulate matter concentration sensor according to claim 5, wherein the particulate matter concentration sensor further comprises a casing;
    所述发光单元、光处理单元、计算单元和档板均设置于所述外壳内；The light emitting unit, the light processing unit, the calculating unit and the baffle are all disposed in the outer casing;
    所述外壳上设置有对称的第一通孔和第二通孔；a symmetric first through hole and a second through hole are disposed on the outer casing;
    所述发光单元所发射的光通过第一通孔进入含颗粒物环境；The light emitted by the light emitting unit enters the particulate matter environment through the first through hole;
    所述散射光通过所述第二通孔进入所述光处理单元。The scattered light enters the light processing unit through the second through hole.
  7. 根据权利要求2～6中任意一项所述的颗粒物浓度传感器，其特征在于，所述计算单元包括接收模块、获取模块和计算模块；The particle concentration sensor according to any one of claims 2 to 6, wherein the calculation unit comprises a receiving module, an obtaining module and a calculating module;
    所述颗粒物浓度传感器还包括存储单元；The particulate matter concentration sensor further includes a storage unit;
    所述接收模块用于接收光电转换器所发送的电信号；The receiving module is configured to receive an electrical signal sent by the photoelectric converter;
    所述获取模块用于从存储单元获取预设的电信号与颗粒物浓度之间的转换系数和初始电信号，其中，所述初始电信号为在所述发光单元没有发射预定波长的光时，所述滤波层接收含颗粒物环境中的波长与所述预定波长相同的光，并向所述光电转换器发送所述光，所述光电转换器根据所述光转换得到的电信号，并将所述电信号存储于存储单元；The obtaining module is configured to obtain, from a storage unit, a conversion coefficient between a preset electrical signal and a particle concentration, and an initial electrical signal, wherein the initial electrical signal is when the light emitting unit does not emit light of a predetermined wavelength. The filter layer receives light having the same wavelength as the predetermined wavelength in a particulate-containing environment, and transmits the light to the photoelectric converter, the photoelectric converter converts the obtained electrical signal according to the light, and the The electrical signal is stored in the storage unit;
    所述计算模块用于根据接收的电信号、初始电信号和转换系数，计算所述含颗粒物环境的颗粒物浓度。The calculation module is configured to calculate a concentration of the particulate matter in the particulate matter environment according to the received electrical signal, the initial electrical signal, and the conversion coefficient.
  8. 根据权利要求1所述的颗粒物浓度传感器，其特征在于，所述传感器还包括聚光透镜；The particulate matter concentration sensor according to claim 1, wherein the sensor further comprises a collecting lens;
    所述聚光透镜设置于所述发光单元上。The concentrating lens is disposed on the light emitting unit.
  9. 一种移动终端，其特征在于，所述移动终端包括权利要求1～8中任意一项所述颗粒物浓度传感器。A mobile terminal, comprising the particulate matter concentration sensor according to any one of claims 1 to 8.
  10. 一种移动终端，其特征在于，包括颗粒物浓度传感器和计算单元；A mobile terminal, comprising: a particle concentration sensor and a calculation unit;
    所述颗粒物浓度传感器包括发光单元和光处理单元；The particulate matter concentration sensor includes a light emitting unit and a light processing unit;
    所述发光单元向含颗粒物环境中发射预定波长的光，其中，所述预定波长的光遇到颗粒物，发生散射，产生散射光；The light emitting unit emits light of a predetermined wavelength into a particle-containing environment, wherein the predetermined wavelength of light encounters particles, scattering occurs, and generating scattered light;
    所述光处理单元包括光电转换器和滤波层，所述滤波层设置于所述光电转换器上； The light processing unit includes a photoelectric converter and a filter layer, and the filter layer is disposed on the photoelectric converter;
    所述光处理单元设置于所述散射光所覆盖的范围内，其中，所述滤波层向所述光电转换器透传所述散射光，并过滤所述散射光以外的光；The light processing unit is disposed within a range covered by the scattered light, wherein the filter layer transparently transmits the scattered light to the photoelectric converter, and filters light other than the scattered light;
    所述光电转换器用于将所述散射光转化为电信号，并向所述计算单元发送所述电信号；The photoelectric converter is configured to convert the scattered light into an electrical signal and transmit the electrical signal to the computing unit;
    所述计算单元用于根据所述电信号，计算所述含颗粒物环境中的颗粒物浓度。The calculating unit is configured to calculate a concentration of the particulate matter in the particulate matter-containing environment according to the electrical signal.
  11. 根据权利要求10所述的移动终端，其特征在于，A mobile terminal according to claim 10, characterized in that
    所述散射光的波长为所述预定波长；The wavelength of the scattered light is the predetermined wavelength;
    所述滤波层用于过滤所述预定波长以外的其他波长的光；The filter layer is configured to filter light of other wavelengths other than the predetermined wavelength;
    所述发光单元所发射的光的光轴中心线与所述光处理单元所接收的光的光轴中心线之间的夹角不等于180度。The angle between the optical axis center line of the light emitted by the light emitting unit and the optical axis center line of the light received by the light processing unit is not equal to 180 degrees.
  12. 根据权利要求11所述的移动终端，其特征在于，所述颗粒物浓度传感器还包括档板；The mobile terminal according to claim 11, wherein the particulate matter concentration sensor further comprises a baffle;
    所述档板设置于所述发光单元与所述光处理单元之间，其中，所述档板用于阻档所述发光单元所发射的光直接传输到所述光处理单元。The baffle is disposed between the light emitting unit and the light processing unit, wherein the baffle is configured to block light emitted by the light emitting unit from being directly transmitted to the light processing unit.
  13. 根据权利要求12所述的移动终端，其特征在于，所述颗粒物浓度传感器还包括外壳；The mobile terminal of claim 12, wherein the particulate matter concentration sensor further comprises a housing;
    所述发光单元、光处理单元、计算单元和档板均设置于所述外壳内；The light emitting unit, the light processing unit, the calculating unit and the baffle are all disposed in the outer casing;
    所述外壳上设置有对称的第一通孔和第二通孔；a symmetric first through hole and a second through hole are disposed on the outer casing;
    所述发光单元所发射的光通过第一通孔进入含颗粒物环境；The light emitted by the light emitting unit enters the particulate matter environment through the first through hole;
    所述散射光通过所述第二通孔进入所述光处理单元。The scattered light enters the light processing unit through the second through hole.
  14. 根据权利要求13所述移动终端，其特征在于，所述计算单元包括接收模块、获取模块和计算模块；The mobile terminal according to claim 13, wherein the computing unit comprises a receiving module, an obtaining module and a calculating module;
    所述移动终端还包括存储单元；The mobile terminal further includes a storage unit;
    所述接收模块用于接收光电转换器所发送的电信号；The receiving module is configured to receive an electrical signal sent by the photoelectric converter;
    所述获取模块用于从存储单元获取预设的电信号与颗粒物浓度之间的转换 系数和初始电信号，其中，所述初始电信号为在所述发光单元没有发射预定波长的光时，所述滤波层接收含颗粒物环境中的波长与所述预定波长相同的光，并向所述光电转换器发送所述光，所述光电转换器根据所述光转换得到的电信号，并将所述电信号存储于存储单元；The obtaining module is configured to obtain a conversion between a preset electrical signal and a particle concentration from the storage unit a coefficient and an initial electrical signal, wherein the initial electrical signal is when the light emitting unit does not emit light of a predetermined wavelength, the filter layer receives light having the same wavelength as the predetermined wavelength in a particle-containing environment, and The photoelectric converter transmits the light, the photoelectric converter converts the obtained electrical signal according to the light, and stores the electrical signal in a storage unit;
    所述计算模块用于根据接收的电信号、初始电信号和转换系数，计算所述含颗粒物环境的颗粒物浓度。The calculation module is configured to calculate a concentration of the particulate matter in the particulate matter environment according to the received electrical signal, the initial electrical signal, and the conversion coefficient.
  15. 根据权利要求10～14中任意一项所述的移动终端，其特征在于，所述移动终端还包括判断单元、报警单元和显示单元；The mobile terminal according to any one of claims 10 to 14, wherein the mobile terminal further comprises a determining unit, an alarm unit and a display unit;
    所述判断单元判断所述计算得到的颗粒物浓度是否大于预定报警浓度；The determining unit determines whether the calculated concentration of the particulate matter is greater than a predetermined alarm concentration;
    若大于所述预定报警浓度，则所述报警单元生成报警信号；If the predetermined alarm concentration is greater than, the alarm unit generates an alarm signal;
    所述显示单元用于显示所述颗粒物浓度。 The display unit is configured to display the particulate matter concentration.
PCT/CN2015/088359 2015-08-28 2015-08-28 Particulate matter concentration sensor and mobile terminal WO2017035690A1 (en)

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