CN112460040A - Pump sound wave monitoring system and method - Google Patents
Pump sound wave monitoring system and method Download PDFInfo
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- CN112460040A CN112460040A CN202011323837.1A CN202011323837A CN112460040A CN 112460040 A CN112460040 A CN 112460040A CN 202011323837 A CN202011323837 A CN 202011323837A CN 112460040 A CN112460040 A CN 112460040A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
- F04D15/0088—Testing machines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H11/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties
- G01H11/06—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means
- G01H11/08—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by detecting changes in electric or magnetic properties by electric means using piezoelectric devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H9/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means
- G01H9/004—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves by using radiation-sensitive means, e.g. optical means using fibre optic sensors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Non-Positive-Displacement Pumps (AREA)
Abstract
本发明公开了一种泵声波监测系统和方法，所述系统包括声波传感器、声波信号传输线缆及网络、声波数据分析平台及声波监测系统平台；所述声波传感器安装在被监测的泵上，用于实时采集泵声波信号，并将采集到的泵的声波信号传输至声波数据分析平台和声波监测系统平台；所述声波传感器外设置有局部隔音组件；所述声波数据分析平台用于滤波、提取特征参数，并将滤波后的声波信号特提取的特征参数发送至声波检测平台；所述声波监测系统平台用于根据泵的声波信号，分析出泵的工作状态，是否发生泄漏或内漏或分析泵的声波信号与泵转速的对应关系。通过相对便宜的声波传感器，实现实时的连续的泵的运行状态在线监测，不但成本低，故障率低而且检出率高。
The invention discloses a pump sound wave monitoring system and method. The system includes a sound wave sensor, a sound wave signal transmission cable and a network, a sound wave data analysis platform and a sound wave monitoring system platform; the sound wave sensor is installed on the pump to be monitored, It is used to collect pump sound wave signals in real time, and transmit the collected sound wave signals of the pump to the sound wave data analysis platform and the sound wave monitoring system platform; the sound wave sensor is provided with a local sound insulation component; the sound wave data analysis platform is used for filtering, Extract the characteristic parameters, and send the characteristic parameters extracted from the filtered acoustic wave signal to the acoustic wave detection platform; the acoustic wave monitoring system platform is used to analyze the working state of the pump according to the acoustic wave signal of the pump, whether leakage or internal leakage occurs or not. Analyze the corresponding relationship between the acoustic signal of the pump and the pump speed. Real-time continuous on-line monitoring of the running state of the pump is realized through relatively inexpensive acoustic wave sensors, which not only has low cost, low failure rate and high detection rate.
Description
Technical Field
The invention belongs to the technical field of pump monitoring, and particularly relates to a pump sound wave monitoring system and method.
Background
The pump is widely applied to production devices in the industries of petrifaction, medicine, food and the like, plays an important role in the devices, and is a power source for producing logistics in factories. In petroleum, petrochemical industry, natural gas device, the use amount of centrifugal pump accounts for 70 ~ 80% of pump total amount, and as a fluid power equipment, the stable safe operation of pump is producing safety and benefit, has also appeared more and more monitoring pump safe operation's correlation technique in the market.
With the development of the internet of things and sensing technology, the remote online monitoring technology is widely applied to industries such as smart homes and automobiles, but the application of the remote online monitoring technology to a water pump system in the field of industrial production is relatively less. With the development of energy-saving services of the water pump system, especially energy-saving projects operated in a contract energy management energy-saving profit sharing mode, because the project period is long, the energy consumption, the operation condition and the water pump operation condition of the water pump system need to be known accurately in real time. However, the application of the existing internet of things and sensing technology in the aspect of the water pump industry mainly adopts the monitoring of signals such as the pump rotating speed, the pressure before and after the pump, the temperature and the like, and the monitoring of the sound of the water pump which generally occurs at present is the noise level of the water pump. The water pump inevitably generates flow phenomena such as pressure fluctuation, fluid instability and the like, such as vortex, backflow, deswirl and cavitation when in operation, imbalance of a water hammer and a rotating part caused by opening and closing of a valve, eccentric rotation caused by mounting defects, improper bearing play and the like. These phenomena all produce vibration and noise, and thus noise monitoring has been a major concern in the past with respect to acoustic signals. However, the water pump still can generate the change of the sound wave signal along with the change of the rotating speed under the low noise level, only the noise level of the water pump is monitored, and the running state of the water pump cannot be monitored more comprehensively.
Disclosure of Invention
The invention provides a pump sound wave monitoring system and a pump sound wave monitoring method, which can realize real-time and continuous online monitoring of the running state of a pump.
In order to achieve the above purpose, the pump sound wave monitoring system of the present invention comprises a sound wave sensor, a sound wave data analysis platform and a sound wave monitoring system platform;
the sound wave sensor is arranged on the pump to be monitored and used for acquiring a sound wave signal of the pump in real time and transmitting the acquired sound wave signal of the pump to the sound wave data analysis platform and the sound wave monitoring system platform, and a local sound insulation component is arranged outside the sound wave sensor;
the sound wave data analysis platform is used for filtering and extracting characteristic parameters, and sending the filtered sound wave signals and the extracted characteristic parameters to the sound wave detection platform;
the sound wave monitoring system platform is used for analyzing the working state of the pump, whether leakage or internal leakage occurs or not or analyzing the corresponding relation between the sound wave signal of the pump and the rotating speed of the pump according to the sound wave signal and the characteristic parameters of the pump.
Further, the acoustic wave sensor is arranged at any position of any one, two or three of the pump motor (1), the pump body (3) and the pump base (8).
Further, the local sound insulation component comprises any one or combination of a sound insulation felt (11), sound insulation cotton (12) and a sound insulation component shell (13).
Further, the sound wave sensor is any one or combination of a listening device, a pickup, a micro-displacement electric signal sound sensor, a surface sound wave sensor, a dynamic pressure sensor, a sound wave frequency sensor, a sound wave sound pressure sensor, a sound wave sound intensity sensor or a sound wave sound power sensor.
Further, the surface acoustic wave sensor is specifically any one or a combination of a rayleigh wave sensor, an optical fiber sensor, a piezoelectric array sensor, a tangential horizontal plate mode sensor, a lamb wave sensor or a love wave sensor.
Furthermore, the acoustic wave sensor is arranged in the pump body (3) or outside the pump body (3) and is closest to the center of the pump.
Further, the acoustic wave sensor is provided with an ID code, and the ID code corresponds to a geographic information code of the geographic position where the acoustic wave sensor is located; and geographic information coding information and model information of the corresponding pump are added when the sound wave sensor transmits the collected sound wave signals.
Further, the acoustic wave sensor is provided with an amplifier.
A pump acoustic monitoring method of a pump acoustic monitoring system, comprising the steps of:
s1: selecting an acoustic wave sensor according to the type of the pipeline and the type of the pump, and installing the acoustic wave sensor on the pump to be monitored;
s2: encoding geographical information of each pump device provided with the acoustic wave sensor;
s3: transmitting the sound wave signals collected by the sound wave sensor to a sound wave monitoring and analyzing platform through a signal transmission line and a network, and analyzing the sound wave monitoring and analyzing platform according to the received sound wave signals;
s4: outputting the analysis result of the sound wave monitoring and analyzing platform to a computer simulation model of a pipeline or a pipe network with geographic information data, and visually displaying the sound wave monitoring result of the pump in a pipe network simulation graph mode;
s5: and the sound wave monitoring and analyzing platform analyzes whether the pump in the pipe network is in fault and the running state of the pump according to the sound wave signals.
A pump flow monitoring method, comprising the steps of:
s11: selecting an acoustic wave sensor according to the type of the pump and installing the acoustic wave sensor on the pump to be monitored;
s12: mounting a pump and an acoustic wave sensor on a flow calibration experiment platform;
s13: debugging a data acquisition system of a pump, an acoustic wave sensor and a flow calibration experiment platform to meet calibration requirements;
s14: debugging a pressure sensor in front of a pump and a flow sensor of a calibration experiment platform to meet calibration requirements;
s15: collecting sound wave signals of a sound wave sensor under the conditions of different pump front pressures, different speed-regulating pump rotating speeds or lifts and different speed-regulating pump flow rates; the sound wave signal comprises sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power;
s17: performing correlation analysis on the data: correlating the pump flow under different pump front pressure conditions with the sound wave signal of the pump to obtain a fitting curve and a fitting formula;
s18: and (3) repeating the steps S11-S17 by using another pump with the same model under the same experimental calibration condition, and performing a check experiment on the obtained fitting curve and the fitting formula: if the check is passed, calculating the pump flow by using a fitting formula and the sound wave signal; if the check is not passed, the process is repeated until the check is passed.
Compared with the prior art, the invention has at least the following beneficial technical effects:
1) the sound wave signal can reflect the signal of the operation condition of other equipment except the noise of the water pump, and the sound wave signal except the noise signal is monitored to monitor the safe operation of the pump. The running state of the pump can be continuously monitored on line in real time through the relatively cheap sound wave sensor, and the method is low in cost, low in failure rate and high in detection rate. And arrange local noise insulation subassembly outside the acoustic wave sensor mounted position, local noise insulation subassembly can cover every acoustic wave sensor, avoids motor noise or other noises to the interference of acoustic wave sensor.
2) According to the structural characteristics of the pump, the acoustic wave sensor is directly additionally arranged in the structure of the pump, so that the real-time and low-cost online monitoring of the pump equipment is realized.
3) The sound wave sensor not only realizes the monitoring of the pump leakage, but also can realize the real-time monitoring of the states of the pump such as starting, stopping, failure, leakage and the like by comparing and analyzing sound wave signals under different pump running states.
4) For the speed regulating pump, the corresponding relation between the acoustic wave signal and the flow under the conditions of the pressure before the pump and the rotating speed of the pump is calibrated and determined by using a calibration platform, and the rough measurement of the flow of the pump with low price can be realized by using an acoustic wave sensor.
5) The acoustic wave sensor is additionally arranged on the existing pump equipment of the fluid pipeline, or the acoustic wave sensor is directly arranged in the pump body in the design and manufacturing process of a new pump; the installation position of the sound wave sensor is the position close to the center of the pump inside or outside the pump body, so that the change of the sound wave signal caused by the change of the rotating speed of the pump can be conveniently and directly monitored.
Drawings
FIG. 1 is a schematic view of a pump acoustic monitoring system;
FIG. 2 is a schematic view of the installation of a partial acoustic baffle assembly and a sonic sensor;
FIG. 3a is a schematic diagram of a speed regulating pump with an acoustic wave sensor according to an embodiment of the present invention; wherein, fig. 3(a) is 20% flow; FIG. 3(b) is 50% flow; FIG. 3(c) is 100% flow;
FIG. 4 is a curve showing the relationship between the sound wave intensity and the flow rate or the rotation speed of the speed-adjustable pump.
In the drawings: 1. pump motor, 2, motor sound wave sensor, 3, the pump body, 4, water inlet, 5, delivery port, 6, check valve, 7, pump body sound wave sensor, 8, pump base, 9, base sound wave sensor, 10, signal line, 11, deadening felt, 12, soundproof cotton, 13, soundproof component shell.
Detailed Description
In order to make the objects and technical solutions of the present invention clearer and easier to understand. The present invention will be described in further detail with reference to the following drawings and examples, wherein the specific examples are provided for illustrative purposes only and are not intended to limit the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified. In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example 1
Referring to fig. 1, a pump acoustic wave monitoring system includes a pump device, an acoustic wave sensor, an acoustic wave signal transmission cable and network, an acoustic wave data analysis platform, and an acoustic wave monitoring system platform; the sound wave sensor is used for collecting sound wave signals of the pump in real time, transmitting the collected sound wave signals of the pump to the sound wave data analysis platform and the sound wave monitoring system platform through the sound wave signal transmission cable and the network, and the sound wave data analysis platform is used for filtering, extracting characteristic parameters and sending the valuable sound wave signals to the sound wave detection platform. The sound wave monitoring system platform analyzes the working state (running or stopping) of the pump, whether leakage or internal leakage occurs or not and analyzes the corresponding relation between the sound wave signal of the pump and the rotating speed of the pump according to the sound wave signal of the pump.
The acoustic wave sensor is arranged at any position of one, two or three of the pump motor 1, the pump body 3 and the pump base 8, the acoustic wave sensor arranged on the pump motor 1 is marked as a motor acoustic wave sensor 2, the acoustic wave sensor arranged on the pump body 3 is marked as a pump body acoustic wave sensor 7, a signal wire 10 is led out from the pump body acoustic wave sensor 7, and the acoustic wave sensor arranged on the base 8 is marked as a base acoustic wave sensor 9. The front of the pump body 3 is provided with a water inlet 4, and the back of the pump body is provided with a check valve 6 and a water outlet 5.
Referring to fig. 2, a local sound insulation assembly is arranged outside the installation position of the sound wave sensor, and the local sound insulation assembly can cover each sound wave sensor, so that the interference of motor noise or other noises on the sound wave sensor is avoided, and each sound wave sensor is ensured to collect the sound wave signal of the measured object in a centralized manner. The local soundproof assembly includes a soundproof assembly housing 13, and a soundproof felt 11, soundproof cotton 12 and a green covering which are provided in the soundproof assembly housing 13 and are sequentially provided from the inside to the outside. The partial acoustic baffle assembly may also be: a soundproof felt 11 and soundproof cotton 12 provided in the soundproof assembly housing 13 in this order from the inside to the outside.
The partial acoustic baffle assembly may also be: comprising a soundproof assembly housing 13 and soundproof cotton 12 or a soundproof felt 11 provided in the soundproof assembly housing 13.
Wherein, the sound-proof felt 11 has higher density, is hard and thin and has good sound-proof effect; the soundproof cotton 12 is thick and fluffy, and the internal fiber can better absorb energy in sound waves. The sound insulation component shell 13 is provided with a sound wave sensor between the bottom and the outer surface of the measured object, the sound wave sensor can be provided with an amplifier to collect the sound wave signal of the measured object and amplify the sound wave signal, then the signal is transmitted to a data acquisition unit through a sound wave signal transmission cable and a network, and then the data acquisition unit transmits the collected signal to a sound wave data analysis platform for data analysis.
The pump is a speed regulating pump, the sound wave monitoring system platform calculates the rotating speed/flow of the speed regulating pump under the given pressure condition before the pump by utilizing a fitted correlation formula of the sound wave signal and the rotating speed/flow under the given pressure condition before the pump on the rotating speed-flow-sound wave calibration platform according to the correlation relationship between the sound wave signal and the rotating speed/flow of the speed regulating pump of the model.
The sound wave sensor is any one or combination of a listening device, a pickup, a micro-displacement electric signal sound sensor, a surface sound wave sensor, a dynamic pressure sensor, a sound wave frequency sensor, a sound wave sound pressure sensor, a sound wave sound intensity sensor and a sound wave sound power sensor.
The surface acoustic wave sensor comprises any one or combination of a Rayleigh wave sensor, a fiber optic sensor, a piezoelectric array sensor, a tangential horizontal plate mode sensor, a lamb (love) wave sensor or a love (lamb) wave sensor.
The acoustic wave sensor is additionally arranged on the existing pump equipment of the fluid pipeline, or the acoustic wave sensor is directly arranged in the pump body in the design and manufacturing process of a new pump; the installation position of the sound wave sensor is the position close to the center of the pump inside or outside the pump body, so that the change of the sound wave signal caused by the change of the rotating speed of the pump can be conveniently and directly monitored.
The acoustic wave sensor is provided with an ID code, and the ID code corresponds to the geographic information code of the geographic position of the acoustic wave sensor.
The sound wave sensor arranged on the pump is used for measuring the sound wave signal of the pump and transmitting the sound wave signal to the sound wave monitoring system platform, and the sound wave monitoring system platform monitors the leakage, vibration and other related signal information detected by the sound wave according to the sound wave signal of the pump.
Example 2
A monitoring method based on the pump sound wave monitoring system comprises the following steps:
s1: according to the type of the fluid pipeline and the type of the pump, such as a tap water pipeline, a natural gas pipeline, a direct-buried heat preservation heating pipeline or an oil pipeline, the pump is different types of pumps such as a volume pump, a centrifugal pump, an axial flow pump, a mixed flow pump or a magnetic pump, the installation position of the sound wave sensor is selected to be suitable, the sound wave sensor is additionally arranged on the existing pump, or the pump with the sound wave sensor is directly used for replacing the existing pump equipment.
S2: each pump device equipped with an acoustic wave sensor is subjected to geographic information coding (GIS coding, i.e. installation position and device number of each device), i.e. coordinate values of the pump device in a geographic information system are obtained, for example: longitude and latitude coordinate values;
s3: and a wired or wireless signal transmission line and a network are installed, the sound wave signals collected by the sound wave sensor are transmitted to the sound wave monitoring and analyzing platform, and the sound wave monitoring and analyzing platform analyzes according to the received sound wave signals.
S4: the analysis result of the sound wave monitoring and analyzing platform is output to a computer simulation model of a pipeline or a pipe network with geographic information data, and the sound wave monitoring result of the pump is visually displayed in a pipe network simulation graph form, so that the sound wave monitoring and analyzing platform is used for analyzing, alarming and monitoring the leakage, the fault and the operation state of various pumps of the pipe network in real time.
Example 3
A monitoring method based on the pump sound wave monitoring system indirectly realizes flow monitoring, and comprises the following steps:
s1: selecting a proper sound wave sensor and the installation position of the sound wave sensor on the pump according to the model and the structure of the speed regulating pump;
s2: installing the pump and the acoustic wave sensor thereof on a flow calibration experiment platform;
s3: debugging a speed regulating pump, various sensors of the speed regulating pump and a data acquisition system of a flow calibration experiment platform to remove noise interference and acquire sound wave signals of a qualified sound wave sensor so as to meet calibration requirements;
s4: debugging pressure sensors in front of and behind the pump of the speed regulating pump and calibrating a flow sensor of the experiment platform to meet the calibration requirement;
s5: monitoring sound wave signals collected by a pump sound wave sensor under the conditions of different pump front pressures, different speed-regulating pump rotating speeds or lifts and different speed-regulating pump flow rates;
s6: the sound wave signal comprises sound wave frequency, sound wave intensity, sound wave pressure and sound wave power;
s7: performing correlation analysis on the data, particularly correlating the pump flow under different pre-pump pressure conditions with the acoustic wave signal of the pump, and fitting a curve and a formula;
s8: and (3) executing the steps by using another speed regulating pump with the same model under the same experimental calibration condition, performing a check experiment on the obtained fitting curve and the formula, if the check is passed, calculating the pump flow by using the formula and the sound wave signal, and if the check is not passed, repeating the process until the check is passed.
Example 4
A pump acoustic monitoring method for analyzing whether a pump has failed, comprising the steps of:
s1: measuring sound wave signals of a pump without faults (namely a calibration pump) at different flow rates in advance, and recording the sound wave signals, wherein the sound wave signals comprise sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power;
s2: selecting proper sound wave sensors, pressure sensors in front of the pump, pressure sensors behind the pump and installation positions of the pressure sensors on the pump according to the model and the structure of the speed regulating pump, and installing the sound wave sensors, the pressure sensors in front of the pump, the pressure sensors behind the pump and the installation positions of the pressure sensors on the pump;
s3: debugging a speed regulating pump, sensors of the speed regulating pump and a data acquisition system of a flow calibration experiment platform, and acquiring qualified sound wave signals of a sound wave sensor without noise interference; the sound wave signal comprises sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power;
s4: referring to FIG. 4, comparing the detected sound wave signal of the speed regulating pump with the sound wave signal of the calibration pump, analyzing the relationship between the sound wave signal L2 collected at S3 and the sound wave signal L1 collected at S1 under the same pressure condition before the pump; if | _ X1-X2 |/X1 ≧ 10%, the pump is deemed to be leaking or leaking internally.
Example 5
A pump sound wave monitoring method is used for detecting whether cavitation occurs in a pump, and comprises the following steps:
s1: taking a fault-free pump as a calibration pump A, measuring and recording sound wave signals of the calibration pump A under different pump front pressures and flow rates, wherein the sound wave signals comprise sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power; measuring sound wave signals of a pump (namely a calibration pump B) with cavitation under different pre-pump pressures and flow rates, and recording, wherein the sound wave signals comprise sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power;
s2: comparing the sound wave signal of the calibration pump B with the sound wave signal of the calibration pump A under the same pump front pressure, and taking the sound wave signal only appearing in the calibration pump B as a characteristic sound wave signal;
s3: selecting proper acoustic wave sensors, pressure sensors in front of the pump, pressure sensors behind the pump and installation positions of the pressure sensors on the pump according to the model and the structure of the pump to be monitored, and installing the acoustic wave sensors, the pressure sensors in front of the pump, the pressure sensors behind the pump and the installation positions of the pressure sensors on the pump;
s4: debugging the monitored pump and each sensor thereof and a data acquisition system of a flow calibration experiment platform, and acquiring qualified sound wave signals of the sound wave sensor for removing noise interference; the sound wave signal comprises sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power;
s5: and analyzing whether the characteristic sound wave signal appears in the sound wave signal of the monitored pump under the condition of the pressure before each pump, and if the characteristic sound wave signal appears, determining that the pump has the cavitation phenomenon.
Example 6
A pump acoustic monitoring method for analyzing a pump for the presence of a leak, comprising the steps of:
s1: selecting a proper sound wave sensor and the installation position of the sound wave sensor on the pump according to the model and the structure of the speed regulating pump;
s2: installing a speed regulating pump and an acoustic wave sensor thereof on a flow calibration experiment platform;
s3: debugging a speed regulating pump, sensors of the speed regulating pump and a data acquisition system of a flow calibration experiment platform, and acquiring qualified sound wave signals of a sound wave sensor without noise interference to meet calibration requirements;
s4: debugging pressure sensors in front of and behind the pump of the speed regulating pump and calibrating a flow sensor of the experiment platform to meet the calibration requirement;
s5: monitoring sound wave signals collected by a pump sound wave sensor under the conditions of different pump front pressures, different speed-regulating pump rotating speeds or lifts and different speed-regulating pump flow rates; the sound wave signal comprises sound wave frequency, sound wave intensity, sound wave pressure and sound wave power;
s6: analyzing the pump flow under the fixed pre-pump pressure condition and correlating with the sound wave signal of the pump to obtain a fitting curve and a fitting formula; changing the pressure difference between the front and the back of the pump to obtain a plurality of fitting curves;
s7: in the actual detection process, finding a corresponding fitting curve according to the front-back pressure difference of the pump with the monitored model, and calculating a corresponding sound wave signal according to the obtained flow opening of the pump; the calculated acoustic signal is X1 and the actual monitored acoustic signal is X2, and if | X1-X2 | X1 ≧ 10%, the pump is deemed to be leaking.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The pump acoustic monitoring systems and methods provided by the present invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (10)
1. A pump sound wave monitoring system is characterized by comprising a sound wave sensor, a sound wave data analysis platform and a sound wave monitoring system platform;
the sound wave sensor is arranged on the pump to be monitored and used for acquiring a sound wave signal of the pump in real time and transmitting the acquired sound wave signal of the pump to the sound wave data analysis platform and the sound wave monitoring system platform, and a local sound insulation component is arranged outside the sound wave sensor;
the sound wave data analysis platform is used for filtering and extracting characteristic parameters, and sending the filtered sound wave signals and the extracted characteristic parameters to the sound wave detection platform;
the sound wave monitoring system platform is used for analyzing the working state of the pump, whether leakage or internal leakage occurs or not or analyzing the corresponding relation between the sound wave signal of the pump and the rotating speed of the pump according to the sound wave signal and the characteristic parameters of the pump.
2. A pump acoustic monitoring system according to claim 1, characterised in that the acoustic sensor is mounted at any position on any one, two or three of the pump motor (1), pump body (3) and pump base (8).
3. A pump acoustic monitoring system according to claim 1, in which the local acoustic insulation assembly comprises any one or a combination of an acoustic felt (11), acoustic wool (12), and an acoustic assembly housing (13).
4. The pump acoustic monitoring system of claim 1, wherein the acoustic sensor is any one or a combination of a listening device, a pickup, a micro-displacement electrical signal acoustic sensor, a surface acoustic wave sensor, a dynamic pressure sensor, an acoustic frequency sensor, an acoustic pressure sensor, an acoustic intensity sensor, or an acoustic power sensor.
5. A pump acoustic wave monitoring system according to claim 1, wherein the surface acoustic wave sensor is embodied as any one or a combination of a rayleigh wave sensor, a fiber optic sensor, a piezoelectric array sensor, a tangential horizontal plate mode sensor, a lamb wave sensor, or a love wave sensor.
6. A pump acoustic monitoring system according to claim 1, characterised in that the acoustic sensor is mounted inside the pump body (3) or outside the pump body (3) in a position closest to the centre of the pump.
7. The acoustic pump monitoring system of claim 1, wherein said acoustic sensor has an ID code corresponding to a geographic information code of a geographic location of said acoustic sensor; and geographic information coding information and model information of the corresponding pump are added when the sound wave sensor transmits the collected sound wave signals.
8. The acoustic pump wave monitoring system of claim 1, wherein the acoustic sensor is configured with an amplifier.
9. A pump acoustic monitoring method based on the pump acoustic monitoring system according to any one of claims 1 to 8, comprising the steps of:
s1: selecting an acoustic wave sensor according to the type of the pipeline and the type of the pump, and installing the acoustic wave sensor on the pump to be monitored;
s2: encoding geographical information of each pump device provided with the acoustic wave sensor;
s3: transmitting the sound wave signals collected by the sound wave sensor to a sound wave monitoring and analyzing platform through a signal transmission line and a network, and analyzing the sound wave monitoring and analyzing platform according to the received sound wave signals;
s4: outputting the analysis result of the sound wave monitoring and analyzing platform to a computer simulation model of a pipeline or a pipe network with geographic information data, and visually displaying the sound wave monitoring result of the pump in a pipe network simulation graph mode;
s5: and the sound wave monitoring and analyzing platform analyzes whether the pump in the pipe network is in fault and the running state of the pump according to the sound wave signals.
10. A pump flow monitoring method based on the pump acoustic wave monitoring system according to any one of claims 1 to 8, characterized by comprising the steps of:
s11: selecting an acoustic wave sensor according to the type of the pump and installing the acoustic wave sensor on the pump to be monitored;
s12: mounting a pump and an acoustic wave sensor on a flow calibration experiment platform;
s13: debugging a data acquisition system of a pump, an acoustic wave sensor and a flow calibration experiment platform to meet calibration requirements;
s14: debugging a pressure sensor in front of a pump and a flow sensor of a calibration experiment platform to meet calibration requirements;
s15: collecting sound wave signals of a sound wave sensor under the conditions of different pump front pressures, different speed-regulating pump rotating speeds or lifts and different speed-regulating pump flow rates; the sound wave signal comprises sound wave frequency, sound wave intensity, sound wave pressure and/or sound wave power;
s17: performing correlation analysis on the data: correlating the pump flow under different pump front pressure conditions with the sound wave signal of the pump to obtain a fitting curve and a fitting formula;
s18: and (3) repeating the steps S11-S17 by using another pump with the same model under the same experimental calibration condition, and performing a check experiment on the obtained fitting curve and the fitting formula: if the check is passed, calculating the pump flow by using a fitting formula and the sound wave signal; if the check is not passed, the process is repeated until the check is passed.
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