CN202648801U - Passive infrared detector - Google Patents
Passive infrared detector Download PDFInfo
- Publication number
- CN202648801U CN202648801U CN 201220111672 CN201220111672U CN202648801U CN 202648801 U CN202648801 U CN 202648801U CN 201220111672 CN201220111672 CN 201220111672 CN 201220111672 U CN201220111672 U CN 201220111672U CN 202648801 U CN202648801 U CN 202648801U
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Abstract
The utility model discloses a passive infrared detector. The detector comprises a Fresnel lens, an infrared sensor and a wireless transmitting circuit. The infrared sensor is connected with an operational amplifier circuit. The operational amplifier circuit is connected with a microprocessor through a temperature-compensation circuit. The microprocessor is connected with a wireless transmitting module used to transmit data in the microprocessor. The temperature-compensation circuit and the microprocessor are connected with an environmental temperature sensing circuit used to collect ambient temperatures. The microprocessor controls the wireless transmitting module through carrying out operation comparison of a change frequency and an electric signal amplitude value on a thermal infrared characteristic electric signal transmitted by the temperature-compensation circuit. By using the detector of the utility model, there are the following advantages that an environmental adaptive capacity, an anti-interference capability and a detection distance of the passive infrared detector are increased; the detector is safe and reliable.
Description
Technical field
The utility model relates to a kind of sniffer in the electronic technology field, particularly a kind of passive type infrared eye.
Background technology
The principle of passive infrared detector is that human body temperature and ambient temperature exist difference, pass through Fresnel Lenses, produce the thermal pulse signal when utilizing human motion, the generation of sort signal can detect by infrared sensor with variation, namely can realize after treatment the human body signal detection.For above-mentioned process, the detector of simple application is a lot of at present, but generally all exist in ambient temperature during near human body temperature (environment about 30 ℃～36 ℃), infrared detecting distance sharply shortens, be exactly to produce " near body temperature effect ", coverage at some detector under this kind environment shortens to about 2 meters, and some detector even detection are less than any human body signal.This defective of this traditional passive infrared detector, can cause detector seasonal detection in use to occur lost efficacy, thereby limited the using value in the security protection place, allowed the pilferage behavior that chance has been arranged, allowed the people's property and life security can not get ensureing.
The utility model content
For the defective of existing traditional passive infrared detector, the utility model provides a kind of passive type infrared eye.
To achieve these goals, the utility model institute Adopts measure is:
A kind of passive type infrared eye, comprise Fresnel Lenses, infrared sensor and radio transmitter, the Fresnel Lenses that the Continuous Heat radiation signal that produces during with human motion is divided into the pulsed thermal radiation signal links to each other with the infrared sensor of surveying processing thermal infrared characteristic signal, realization is to being radiated thermal infrared characteristic signal in the sensor window to the conversion of ultra-weak electronic signal, infrared sensor links to each other with operational amplification circuit, the high magnification of realizing ultra-weak electronic signal that infrared sensor is obtained by operational amplification circuit amplifies, operational amplification circuit links to each other with microprocessor through temperature-compensation circuit, be connected with the wireless transmitter module of data in the emission microprocessor on the microprocessor, temperature-compensation circuit all links to each other with the environment temperature sensing circuit that gathers environment temperature with microprocessor, realize that temperature-compensation circuit and microprocessor are to the collection of environment temperature, temperature-compensation circuit is realized temperature compensation to the electric signal that amplifies by the environment temperature obtained, microprocessor compares by the computing that the thermal infrared feature electric signal that temperature-compensation circuit is transmitted carries out change frequency and electrical signal amplitude value, realization is to the control of wireless transmitter module, when reaching desired frequency range and electrical signal amplitude value, trigger wireless transmitter module, wireless transmitter module is launched the serial data that sends from microprocessor with wireless system.
The beneficial effects of the utility model: by the Real-Time Monitoring to current environmental temperature, with automatic adjustment amplifier enlargement ratio, and the basic basis when providing simultaneously temperature data as microprocessor signal to be processed, thereby adaptive capacity to environment, antijamming capability and the detection range of passive type infrared eye have been improved, more safe and reliable, even ℃～36 ℃ rugged surrounding temperature under, detection range also can guarantee about 7 meters.
Description of drawings
Fig. 1, connection side's block diagram of the present utility model.
Embodiment
A kind of passive type infrared eye, comprise Fresnel Lenses, infrared sensor and radio transmitter, the Fresnel Lenses that the Continuous Heat radiation signal that produces during with human motion is divided into the pulsed thermal radiation signal links to each other with the infrared sensor of surveying processing thermal infrared characteristic signal, realization is to being radiated thermal infrared characteristic signal in the sensor window to the conversion of ultra-weak electronic signal, infrared sensor links to each other with operational amplification circuit, the high magnification of realizing ultra-weak electronic signal that infrared sensor is obtained by operational amplification circuit amplifies, operational amplification circuit links to each other with microprocessor through temperature-compensation circuit, be connected with the wireless transmitter module of data in the emission microprocessor on the microprocessor, temperature-compensation circuit all links to each other with the environment temperature sensing circuit that gathers environment temperature with microprocessor, realize that temperature-compensation circuit and microprocessor are to the collection of environment temperature, temperature-compensation circuit is realized temperature compensation to the electric signal that amplifies by the environment temperature obtained, microprocessor compares by the computing that the thermal infrared feature electric signal that temperature-compensation circuit is transmitted carries out change frequency and electrical signal amplitude value, realization is to the control of wireless transmitter module, when reaching desired frequency range and electrical signal amplitude value, trigger wireless transmitter module, wireless transmitter module is launched the serial data that sends from microprocessor with wireless system.
Principle of work of the present utility model: temperature-compensation circuit automatically adjusts to thermal infrared feature electric signal enlargement factor according to the environment temperature of obtaining, send the current environmental temperature value to microprocessor with electrical signal form simultaneously, allow microprocessor realize different algorithm process to thermal infrared feature change in electric frequency from thermal infrared feature electrical signal amplitude according to the current environmental temperature value; Microprocessor is realized thermal infrared feature change in electric frequency and electrical signal amplitude value are carried out the computing comparison of special algorithm.Detector is made different gains by the real-time sampling to environment temperature to infrared electric signal, offers simultaneously reference signal of carrying out the signal processing according to real time environment of microprocessor.
The beneficial effects of the utility model: by the Real-Time Monitoring to current environmental temperature, with automatic adjustment amplifier enlargement ratio, and the basic basis when providing simultaneously temperature data as microprocessor signal to be processed, thereby adaptive capacity to environment, antijamming capability and the detection range of passive type infrared eye have been improved, more safe and reliable, even ℃～36 ℃ rugged surrounding temperature under, detection range also can guarantee about 7 meters.
Those skilled in the art's simple change and replacement all are within the protection domain of the present utility model in this area.
Claims (1)
1. passive type infrared eye, comprise Fresnel Lenses, infrared sensor and radio transmitter, the Fresnel Lenses that the Continuous Heat radiation signal that produces during with human motion is divided into the pulsed thermal radiation signal links to each other with the infrared sensor of surveying processing thermal infrared characteristic signal, realization is to being radiated thermal infrared characteristic signal in the sensor window to the conversion of ultra-weak electronic signal, it is characterized in that: infrared sensor links to each other with operational amplification circuit, the high magnification of realizing ultra-weak electronic signal that infrared sensor is obtained by operational amplification circuit amplifies, operational amplification circuit links to each other with microprocessor through temperature-compensation circuit, be connected with the wireless transmitter module of data in the emission microprocessor on the microprocessor, temperature-compensation circuit all links to each other with the environment temperature sensing circuit that gathers environment temperature with microprocessor, realize that temperature-compensation circuit and microprocessor are to the collection of environment temperature, temperature-compensation circuit is realized temperature compensation to the electric signal that amplifies by the environment temperature obtained, microprocessor compares by the computing that the thermal infrared feature electric signal that temperature-compensation circuit is transmitted carries out change frequency and electrical signal amplitude value, realizes the control to wireless transmitter module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220111672 CN202648801U (en) | 2012-03-16 | 2012-03-16 | Passive infrared detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220111672 CN202648801U (en) | 2012-03-16 | 2012-03-16 | Passive infrared detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202648801U true CN202648801U (en) | 2013-01-02 |
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ID=47417896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220111672 Expired - Fee Related CN202648801U (en) | 2012-03-16 | 2012-03-16 | Passive infrared detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202648801U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141775A (en) * | 2015-09-14 | 2015-12-09 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal, and control method and system for screen brightness of mobile terminal |
| CN108594108A (en) * | 2018-04-11 | 2018-09-28 | 合肥恩锐科技有限公司 | A kind of electrical equipment online monitoring system |
| CN110915301A (en) * | 2017-07-27 | 2020-03-24 | 昕诺飞控股有限公司 | System, method and apparatus for compensating analog signal data from a luminaire using ambient temperature estimates |
| CN112074051A (en) * | 2020-08-26 | 2020-12-11 | 安徽亮亮电子科技有限公司 | Intelligent night lamp control circuit with temperature compensation function and control method |
| CN112097915A (en) * | 2020-09-10 | 2020-12-18 | 江西省桑格尔电子有限公司 | Face recognition temperature measurement method and device |
-
2012
- 2012-03-16 CN CN 201220111672 patent/CN202648801U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105141775A (en) * | 2015-09-14 | 2015-12-09 | Tcl移动通信科技（宁波）有限公司 | Mobile terminal, and control method and system for screen brightness of mobile terminal |
| CN110915301A (en) * | 2017-07-27 | 2020-03-24 | 昕诺飞控股有限公司 | System, method and apparatus for compensating analog signal data from a luminaire using ambient temperature estimates |
| CN110915301B (en) * | 2017-07-27 | 2022-05-31 | 昕诺飞控股有限公司 | System, method and apparatus for compensating analog signal data using ambient temperature estimates |
| CN108594108A (en) * | 2018-04-11 | 2018-09-28 | 合肥恩锐科技有限公司 | A kind of electrical equipment online monitoring system |
| CN112074051A (en) * | 2020-08-26 | 2020-12-11 | 安徽亮亮电子科技有限公司 | Intelligent night lamp control circuit with temperature compensation function and control method |
| CN112074051B (en) * | 2020-08-26 | 2021-07-13 | 安徽亮亮电子科技有限公司 | Intelligent night lamp control circuit with temperature compensation function and control method |
| CN112097915A (en) * | 2020-09-10 | 2020-12-18 | 江西省桑格尔电子有限公司 | Face recognition temperature measurement method and device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130102 Termination date: 20160316 |