CN114740158A - Atmospheric gaseous pollutant detection module and detection device - Google Patents
Atmospheric gaseous pollutant detection module and detection device Download PDFInfo
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- CN114740158A CN114740158A CN202210366364.6A CN202210366364A CN114740158A CN 114740158 A CN114740158 A CN 114740158A CN 202210366364 A CN202210366364 A CN 202210366364A CN 114740158 A CN114740158 A CN 114740158A
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- 238000001514 detection method Methods 0.000 title claims abstract description 56
- 239000003344 environmental pollutant Substances 0.000 title claims abstract description 28
- 231100000719 pollutant Toxicity 0.000 title claims abstract description 28
- 238000005070 sampling Methods 0.000 claims description 14
- 238000001914 filtration Methods 0.000 claims description 12
- 230000007613 environmental effect Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 4
- 230000003750 conditioning effect Effects 0.000 claims description 4
- 230000004044 response Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 2
- 230000000274 adsorptive effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000004422 calculation algorithm Methods 0.000 description 4
- 230000003321 amplification Effects 0.000 description 3
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 238000003199 nucleic acid amplification method Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000002745 absorbent Effects 0.000 description 1
- 239000002250 absorbent Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007621 cluster analysis Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention provides an atmospheric gaseous pollutant detection module and a detection device, belonging to the technical field of pollutant detection, wherein the detection module comprises a detection air chamber, a sensor diversion bracket, a sensor, a circuit board and an air pump, wherein the detection air chamber is of a barrel-shaped structure; the module integrates the sensor, the circuit and the gas circuit into a whole, and has simple structure, small and exquisite appearance and convenient application.
Description
Technical Field
The invention relates to the technical field of pollutant detection, in particular to an atmospheric gaseous pollutant detection module and an atmospheric gaseous pollutant detection device.
Background
In recent years, environmental pollution problems, especially air pollution problems, puzzle people's lives all the time, seriously threaten people's life health, and governments in various places have gone on the way of accurately controlling haze. The gridding monitoring data is multi-point-location high-frequency three-dimensional space-time atmospheric environment quality monitoring data, and data are accumulated along with the passing of monitoring time, so that a data basis is provided for further carrying out big data analysis and deep mining. By utilizing the data, many scientific researches and applications can be carried out, including pollution origin analysis, cluster analysis and the like. However, the existing environmental pollution detection equipment has large volume, complex structure and high production and manufacturing cost, and is not beneficial to large-scale delivery and formation of a dense gridding system.
Disclosure of Invention
The invention aims to provide an atmospheric gaseous pollutant detection module and a detection device, wherein the module integrates a sensor, a circuit and a gas circuit into a whole, has a simple structure, a small and exquisite appearance and is convenient to apply, and the problems that the conventional environmental pollution detection equipment is large in size, complex in structure, high in production and manufacturing cost and not beneficial to large-scale delivery and composition of an intensive gridding system are solved.
In a first aspect, the invention provides an atmospheric gaseous pollutant detection module, which comprises a detection air chamber, a sensor diversion bracket, a sensor, a circuit board and an air pump;
the detection air chamber is of a barrel-shaped structure, the sensor diversion bracket is arranged at the bottom of the detection air chamber, the sensor is arranged above the sensor diversion bracket, the sensor is connected with the circuit board, the circuit board is positioned above the sensor, and the circuit board is used as an upper cover to form a closed cavity with the detection air chamber; the sensor is used for acquiring a pollutant gas concentration signal response value and environmental data;
the sensor flow guide support comprises a support plate and a plurality of support legs, and a gas passage is formed by a space between the support plate and the bottom of the detection air chamber;
the supporting plate is provided with a plurality of holes, and the sampling gas in the gas passage is contacted with the sampling window on the sensor through the holes;
the lateral wall of the detection air chamber is provided with a sample gas inlet and a sample gas outlet, the sample gas outlet is arranged at the opposite side of the sample gas inlet, the sample gas inlet is arranged at the bottom of the lateral wall, the sample gas outlet is arranged in the middle of the lateral wall, and the sample gas outlet is connected with the air inlet pipe of the air pump.
Furthermore, an analog circuit unit and a digital circuit unit are arranged on the circuit board;
the analog circuit unit is used for conditioning, filtering and performing analog-to-digital conversion on an analog signal acquired by the sensor to generate a digital signal;
the digital circuit unit is used for filtering, transmitting and calculating the digital signal to finally generate the concentration value.
Further, the air pump is a negative pressure micro air pump.
Furthermore, an exhaust pipe of the air pump is connected with an exhaust port of the micro air station system.
Furthermore, the sample gas inlet is connected with a sampling pipe of the micro air station system.
Further, an air pump control network is arranged on the air pump, and the air pump control network is in communication connection with the digital circuit unit.
Further, the sensors comprise an electrochemical sensor, a PID sensor, a temperature sensor, a humidity sensor and an air pressure sensor.
Furthermore, non-absorbent materials are filled between the sensors.
Further, the environmental data includes temperature data, humidity data, and barometric pressure data.
In a second aspect, the invention further provides a detection device, which comprises the atmospheric gaseous pollutant detection module.
The invention has the advantages that:
(1) the modularized design, simple structure is suitable for volume production, convenient to use, easy to maintain.
(2) The number of the formed components is small, the assembly is simple, and the maintenance is convenient.
(3) The system integration only needs to be matched with a very small amount of gas circuit accessories.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic structural diagram of an atmospheric gaseous pollutant detection module according to an embodiment of the present invention;
1. detecting the air chamber; 2. a sensor flow guide bracket; 3. a sensor; 4. a circuit board; 5. an air pump; 6. a support plate; 7. supporting legs; 8. sampling a window; 9. a sample gas inlet; 10. and a sample gas outlet.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For convenience of understanding, the atmospheric gaseous pollutant detection module provided by the embodiment of the present invention is described in detail below, and refer to fig. 1.
The atmospheric gaseous pollutant detection module provided by the embodiment of the invention comprises a detection air chamber 1, a sensor guide bracket 2, a sensor 3, a circuit board 4 and an air pump 5; the detection air chamber 1 is of a barrel-shaped structure, the sensor diversion bracket 2 is arranged at the bottom of the detection air chamber 1, the sensor 3 is arranged above the sensor diversion bracket 2, the sensor 3 is connected with the circuit board 4, the circuit board 4 is positioned above the sensor 3, and the circuit board 4 is used as an upper cover to form a closed cavity with the detection air chamber 1; the sensor 3 is used for acquiring a pollutant gas concentration signal response value and environmental data; the sensor flow guide support 2 comprises a support plate 6 and a plurality of support legs 7, and a space between the support plate 6 and the bottom of the detection air chamber 1 forms an air passage; a plurality of holes are formed in the supporting plate 6, and sampling gas in the gas passage is in contact with the sampling window 8 on the sensor 3 through the holes; the lateral wall of detection air chamber 1 is provided with sample gas air inlet 9 and sample gas outlet 10, and sample gas outlet 10 sets up in sample gas air inlet 9 opposite side, and sample gas air inlet 9 sets up in the lateral wall bottom, and sample gas outlet 10 sets up in the middle part of the lateral wall, the intake-tube connection of sample gas outlet and air pump 5. The gas circuit is designed to be a closed gas chamber and a pump suction type negative pressure sampling, and a plurality of sensors are completely arranged in the gas chamber. The sampling air inlet is positioned at the lower end of the side wall of the air chamber, and the sample air rapidly reaches the sampling window of the sensor after entering the air chamber. The air outlet is connected with the air pump, and the sample gas reaches the air outlet along the lowest path of air resistance, and then is sucked and discharged by the air pump. The sensor flow guide support has two functions, namely, the support function is realized on the inverted sensor, and the flow guide function is realized on the gas entering from the sample gas inlet, so that the gas can reach the sampling windows of all the sensors to cause the response of the sensors.
In a possible embodiment, the circuit board 4 is provided with an analog circuit unit and a digital circuit unit; the analog circuit unit is used for conditioning, filtering and performing analog-to-digital conversion on an analog signal acquired by the sensor to generate a digital signal; the digital circuit unit is used for filtering, transferring and calculating the digital signal to finally generate the concentration value. The analog circuit unit digitizes the analog signal and transmits the digitized signal to the digital unit for processing and analysis. The digital circuit unit digitally filters the digitized analog signal and transmits the digital signal as an original signal to the concentration calculation algorithm module to generate an original concentration value, the compensation algorithm module further generates a compensation concentration value, and the correction algorithm module generates a correction concentration value. The digital unit performs data interaction with an upper computer, receives a control instruction, returns an execution result and the like by applying a standard MODBUS communication protocol on the RS485 physical bus. The signal conditioning circuit structure is characterized in that primary trans-impedance amplification is directly coupled with secondary differential amplification through resistance-capacitance low-pass filtering, and then the secondary differential amplification is directly coupled with a second-order active filter, so that excellent signal gain, signal-to-noise ratio and signal stability are obtained by finely adjusting and calibrating direct current working points and signal gains of all stages of the circuit, and circuit guarantee is provided for the excellent performance of the whole system. A series of numerical value sequences carrying analog signal information are obtained by carrying out 16-bit precision continuous and rapid AD conversion on the voltage signal output by the regulating circuit, and the numerical value sequences are called as original AD values. For the original AD value, firstly, a median filtering method is used for filtering, impulse noise interference caused by accidental factors is eliminated, and then a Kalman filtering method with high smoothness and good real-time performance is used for filtering the original AD value again. Through two-stage digital filtering processing, the noise of the original AD value is obviously reduced, and an AD value signal carrying useful information is obtained.
In a possible embodiment, the air pump 5 is a negative pressure micro air pump, which has stable flow, low noise, low power consumption, long service life and is maintenance-free.
In a possible embodiment, the exhaust pipe of the air pump 5 is connected with the exhaust port of the micro air station system, and the number of external pipelines of the equipment is reduced by connecting the internal pipelines.
In a possible implementation mode, the sample gas inlet 9 is connected with a sampling pipe of the micro air station system, and the number of external pipelines of the equipment is reduced through internal connection of the pipelines.
In a possible implementation manner, an air pump control network is arranged on the air pump 5, the air pump control network is in communication connection with the digital circuit unit, and the air pump control network with the working state controlled by the MCU digital level signal is designed between the air pump power supply and the air pump connector, so that the on/off of the air pump power supply loop can be simply controlled, and the rotation speed of the air pump motor can be adjusted in a PWM manner, thereby realizing the air pump flow control.
In one possible embodiment, the sensor 3 comprises an electrochemical sensor including an SO, a PID sensor, a temperature sensor, a humidity sensor, and a barometric pressure sensor2Electrochemical sensor, NO2Electrochemical sensor, CO electrochemical sensor and O3Electrochemical sensors for respectively detecting SO2、NO2CO and O3And the PID sensor is used for detecting TVOC.
In one possible embodiment, the environmental data comprise temperature data, humidity data and air pressure data, and a compensation matrix is generated in the algorithm module to correct the corresponding concentration value of the original signal.
The embodiment of the invention also provides a detection device comprising the atmospheric gaseous pollutant detection module. The detection device provided by the embodiment of the invention comprises the technical characteristics of the atmospheric gaseous pollutant detection module, so that the same technical problems can be solved, and the same technical effects can be achieved.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are conventionally placed in use, and are only used for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; 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.
The apparatus provided by the embodiment of the present invention may be specific hardware on the device, or software or firmware installed on the device, etc. The device provided by the embodiment of the present invention has the same implementation principle and the same technical effects as those of the foregoing method embodiments, and for the sake of brief description, reference may be made to corresponding contents in the foregoing method embodiments for the parts of the device embodiments that are not mentioned. It can be clearly understood by those skilled in the art that, for convenience and simplicity of description, the specific working processes of the system, the apparatus and the unit described above may all refer to the corresponding processes in the method embodiments, and are not described herein again.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the following descriptions are only illustrative and not restrictive, and that the scope of the present invention is not limited to the above embodiments: any person skilled in the art can modify or easily conceive the technical solutions described in the foregoing embodiments or equivalent substitutes for some technical features within the technical scope of the present disclosure; and the modifications, changes or substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention. Are intended to be covered by the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. The atmospheric gaseous pollutant detection module is characterized by comprising a detection air chamber (1), a sensor flow guide bracket (2), a sensor (3), a circuit board (4) and an air pump (5);
the detection air chamber (1) is of a barrel-shaped structure, the sensor diversion support (2) is arranged at the bottom of the detection air chamber (1), the sensor (3) is arranged above the sensor diversion support (2), the sensor (3) is connected with the circuit board (4), the circuit board (4) is positioned above the sensor (3), and the circuit board (4) serves as an upper cover and forms a closed cavity with the detection air chamber (1);
the sensor (3) is used for acquiring a pollutant gas concentration signal response value and environmental data;
the sensor flow guide support (2) comprises a support plate (6) and a plurality of support legs (7), and a gas passage is formed by the space between the support plate (6) and the bottom of the detection gas chamber (1);
a plurality of holes are formed in the supporting plate (6), and sampling gas in the gas passage is in contact with a sampling window (8) on the sensor (3) through the holes;
the lateral wall of detection air chamber (1) is provided with sample gas air inlet (9) and sample gas outlet (10), and sample gas outlet (10) set up in sample gas air inlet (9) opposite side, and sample gas air inlet (9) set up in the lateral wall bottom, and sample gas outlet (10) set up in the middle part of the lateral wall, and sample gas outlet (10) and the intake-tube connection of air pump (5).
2. Atmospheric gaseous pollutant detection module according to claim 1, characterized in that said circuit board (4) is provided with an analog circuit unit and a digital circuit unit;
the analog circuit unit is used for conditioning, filtering and performing analog-to-digital conversion on an analog signal acquired by the sensor to generate a digital signal;
the digital circuit unit is used for filtering, transferring and calculating the digital signal to finally generate the concentration value.
3. The atmospheric gaseous pollutant detection module of claim 1, characterized in that, the air pump (5) is a negative pressure micro air pump.
4. The atmospheric gaseous pollutant detection module of claim 1, characterized in that, the air pump (5) exhaust pipe is connected with the micro air station system exhaust port.
5. The atmospheric gaseous pollutant detection module of claim 1, characterized in that, the sample gas inlet (9) is connected with a micro air station system sampling pipe.
6. The atmospheric gaseous pollutant detection module according to claim 2, characterized in that an air pump control network is arranged on the air pump (5), and the air pump control network is in communication connection with the digital circuit unit.
7. The atmospheric gaseous pollutant detection module of claim 1, characterized in that the sensor (3) comprises an electrochemical sensor, a PID sensor, a temperature sensor, a humidity sensor and a barometric pressure sensor.
8. Atmospheric gaseous pollutant detection module according to claim 7, characterized in that between each sensor (3) there is filled a non-adsorptive material.
9. The atmospheric gaseous pollutant detection module of claim 1, wherein the environmental data includes temperature data, humidity data and barometric pressure data.
10. A detection device comprising an atmospheric gaseous pollutant detection module according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210366364.6A CN114740158A (en) | 2022-04-08 | 2022-04-08 | Atmospheric gaseous pollutant detection module and detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210366364.6A CN114740158A (en) | 2022-04-08 | 2022-04-08 | Atmospheric gaseous pollutant detection module and detection device |
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| CN114740158A true CN114740158A (en) | 2022-07-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115372285A (en) * | 2022-10-26 | 2022-11-22 | 杭州泽天春来科技有限公司 | Tail gas analysis device and method |
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| US20210223222A1 (en) * | 2020-01-16 | 2021-07-22 | Microjet Technology Co., Ltd. | Air detection system |
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2022
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Patent Citations (4)
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| CN204630979U (en) * | 2015-01-13 | 2015-09-09 | 中国铁路总公司 | Multisensor air chamber |
| CN208013138U (en) * | 2018-03-19 | 2018-10-26 | 北京康尔兴科技发展有限公司 | Environmental gas precision quick-check sensor device |
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