CN214952882U - Data acquisition calibration control unit for particulate matter concentration measurement - Google Patents
Data acquisition calibration control unit for particulate matter concentration measurement Download PDFInfo
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- CN214952882U CN214952882U CN202120423602.3U CN202120423602U CN214952882U CN 214952882 U CN214952882 U CN 214952882U CN 202120423602 U CN202120423602 U CN 202120423602U CN 214952882 U CN214952882 U CN 214952882U
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- data acquisition
- control unit
- sensor
- particulate matter
- matter concentration
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- 239000013618 particulate matter Substances 0.000 title claims abstract description 43
- 238000005259 measurement Methods 0.000 title claims abstract description 37
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 239000002245 particle Substances 0.000 claims description 9
- 230000005540 biological transmission Effects 0.000 claims description 6
- 238000013500 data storage Methods 0.000 claims description 5
- 238000004891 communication Methods 0.000 claims description 4
- 238000012544 monitoring process Methods 0.000 abstract description 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000007613 environmental effect Effects 0.000 abstract description 2
- 238000000149 argon plasma sintering Methods 0.000 description 6
- 230000005250 beta ray Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The utility model discloses an environmental monitoring instrument technical field's a data acquisition calibration control unit for particulate matter concentration measurement, including particulate matter concentration data acquisition control unit and external sensor, particulate matter concentration data acquisition control unit comprises sensor interface circuit, SD joint mouth, FLASH, CPU LPC1768, LCD display circuit, heating control circuit, air pump control circuit, RS232 output and 4G DTU, particulate matter concentration data acquisition control unit with external sensor passes through sensor interface circuit electric connection, the beneficial effects of the utility model are that: 1. the utility model adopts the data acquisition unit of the multi-element and multi-sensor type interface, which can satisfy the self-compensation and self-calibration function of the instrument and adapt to the sensor measurement modules of different types of interfaces; 2. the high-precision flow velocity sensor is used for measuring data, an air pump driving circuit and a PID control algorithm are adopted, the accurate control of the flow velocity of the sample is realized, and the accuracy of the measurement of the concentration of the particulate matters is ensured.
Description
Technical Field
The utility model relates to an environmental monitoring instrument technical field specifically is a data acquisition calibration control unit for particulate matter concentration measurement.
Background
At present, three measurement principles of an oscillating balance, beta ray and light scattering measurement are mainly used for measuring the concentration of atmospheric particulates, and the oscillating balance and the beta ray measurement principle are mainly used for analytical instruments and are suitable for being applied to national environment-friendly monitoring stations and laboratories. Light scattering particulate matter measuring apparatu has developed rapidly in recent years, and light scattering particulate matter measuring apparatu has promoted particulate matter measuring apparatu's miniaturization and low cost, and especially adapted grid atmosphere monitoring is used, also provides a more accurate more economic measuring mode for building site raise dust monitoring.
At present, a pumping type light scattering particulate matter concentration measuring instrument sucks sample gas into a sensor measuring module through an air pump, the sensor measuring module mainly comprises a laser emitting unit, a light scattering measuring unit and a sampling cavity, when particulate matters pass through the sampling cavity, a scattering effect is generated on emitted laser signals, the size of the particulate matters is inverted through measuring the intensity of the scattering signals, the quantity of the particulate matters is counted, and the measurement of the mass concentration of the particulate matters can be realized through calculation. The measurement of the particulate matter concentration is closely related to the flow rate, air temperature, humidity and air pressure of the sample gas, so that the accurate measurement of the particulate matter concentration must be realized by accurately controlling the flow rate of the sample gas, controlling the temperature of the sample gas and compensating and calibrating according to the influence of the temperature, the humidity and the air pressure on the measurement data. Most of the existing light scattering particulate matter concentration measuring instruments only adopt simple pump suction measurement, so that the data measurement accuracy is reduced, and the error is large. Through designing a measurement control unit that has many key elements data acquisition, storage, transmission, sample gas velocity accurate control and temperature control, can realize the accurate measurement to particulate matter concentration through temperature, wet, pressure compensation calibration software, can effectively promote the product measurement accuracy, for this reason, we provide a data acquisition calibration control unit for particulate matter concentration measurement.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a data acquisition calibration control unit for particulate matter concentration measurement to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a data acquisition calibration control unit for measuring the concentration of particulate matters comprises a particulate matter concentration data acquisition control unit and an external sensor, wherein the particulate matter concentration data acquisition control unit consists of a sensor interface circuit, an SD card interface, FLASH, a CPU LPC1768, an LCD display circuit, a heating control circuit, an air pump control circuit, RS232 output and a 4G DTU, and the particulate matter concentration data acquisition control unit is electrically connected with the external sensor through the sensor interface circuit.
Preferably, the particle concentration data acquisition control unit takes an LPC1768 ARM processor as a core and is internally provided with a data acquisition unit with a multi-element and multi-sensor type interface; the particle concentration data acquisition control unit is internally provided with a large-capacity Flash memory and an SD card data storage interface, and the sensor interface circuit comprises RS232, RS485, analog voltage, current, pulse signals and the like.
Preferably, the particulate matter concentration data acquisition control unit has wired (RS232 serial ports) and wireless (4G DTU) communication interface, satisfies different data transmission application demands, the particulate matter concentration data acquisition control unit has the display screen interface, can access the LCD display screen, can show real-time measurement data and equipment state.
Preferably, the external sensor comprises a particulate matter sensor measuring module, a temperature and humidity sensor, a temperature sensor, an air pressure sensor and a flow sensor.
Compared with the prior art, the beneficial effects of the utility model are that:
1. the utility model discloses a data acquisition unit of many key elements, multisensor type interface can satisfy instrument self compensation self calibration function, can adapt to the sensor measuring module of different grade type interface.
2. The high-precision flow velocity sensor is used for measuring data, an air pump driving circuit and a PID control algorithm are adopted, the accurate control of the flow velocity of the sample is realized, and the accuracy of the measurement of the concentration of the particulate matters is ensured.
3. By adopting the sample gas temperature heating control circuit, the sample gas is heated and dehumidified, and the accuracy of instrument measurement in a high-humidity environment can be ensured.
4. And the instrument can be compensated and calibrated by adopting a software compensation algorithm of temperature, humidity and air pressure. The sample gas temperature heating control circuit realizes heating and dehumidification of the sample gas and can ensure the accuracy of instrument measurement in a high-humidity environment.
Drawings
Fig. 1 is a schematic diagram of the hardware unit composition of the present invention.
Fig. 2 is a schematic diagram of the embedded software workflow of the present invention.
In the figure: 1. a particulate matter concentration data acquisition control unit; 101. a sensor interface circuit; 102. an SD card interface; 103. FLASH; 104. CPU LPC 1768; 105. an LCD display circuit; 106. a heating control circuit; 107. an air pump control circuit; 108. RS232 output; 109. 4G DTU; 2. and a sensor is connected externally.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1-2, the present invention provides a technical solution: the utility model provides a data acquisition calibration control unit for particulate matter concentration measurement, including particulate matter concentration data acquisition control unit 1 and external sensor 2, particulate matter concentration data acquisition control unit 1 is by sensor interface circuit 101, SD card interface 102, FLASH103, CPU LPC1768104, LCD display circuit 105, heating control circuit 106, air pump control circuit 107, RS232 output 108 and 4G DTU109 constitute, particulate matter concentration data acquisition control unit 1 passes through sensor interface circuit 101 electric connection with external sensor 2.
The particle concentration data acquisition control unit 1 takes an LPC1768 ARM processor as a core and is internally provided with a data acquisition unit with a multi-element and multi-sensor type interface; the particle concentration data acquisition control unit 1 is internally provided with a large-capacity Flash memory and is provided with an SD card data storage interface, and the sensor interface circuit 101 comprises RS232, RS485, analog voltage, current, pulse signals and the like;
the particulate matter concentration data acquisition control unit 1 is provided with a wired (RS232 serial port) and wireless (4G DTU) communication interface to meet different data transmission application requirements, and the particulate matter concentration data acquisition control unit 1 is provided with a display screen interface which can be connected with an LCD display screen and can display real-time measurement data and equipment states;
the external sensor 2 comprises a particle sensor measuring module, a temperature and humidity sensor, a temperature sensor, an air pressure sensor and a flow sensor.
The working principle is as follows: as shown in fig. 1-2, the particulate matter concentration data acquisition control unit 1 according to the present invention includes a multi-factor data acquisition unit, a data storage unit, a data transmission unit, a real-time data display unit, a PID sample gas flow rate control unit, a sample gas temperature control unit, etc., and has temperature, humidity, pressure compensation, etc. the particulate matter concentration data acquisition control unit 1 uses LPC1768 ARM processor as a core and is provided with a data acquisition unit with a multi-factor, multi-sensor type interface; a large-capacity Flash memory is arranged in the memory, and an SD card data storage interface is arranged in the memory; the particulate matter concentration data acquisition control unit 1 is provided with a wired (RS232 serial port) and wireless (4G DTU) communication interface, and meets different data transmission application requirements; the device is provided with a display screen interface, can be accessed to an LCD display screen and can display real-time measurement data and equipment states; the device is provided with a circuit interface connected with a diaphragm air pump, the high-precision flow velocity sensor is used for measuring data, and the PID algorithm is used for realizing the precise control of the flow velocity of the sample so as to ensure the measurement accuracy of the final particulate matter concentration; the device is provided with a sample gas temperature heating control circuit, and under the condition of high humidity, if the sample gas is not heated, the final particulate matter concentration measurement error is very large, so the sample gas must be heated and dehumidified before entering a measurement unit; according to the influence of temperature, humidity and air pressure on the measurement result, compensation calibration needs to be carried out through software, and the accuracy of measurement is ensured.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (4)
1. The utility model provides a data acquisition calibration control unit for particulate matter concentration measurement, includes particulate matter concentration data acquisition control unit (1) and external sensor (2), its characterized in that: the particle concentration data acquisition control unit (1) is composed of a sensor interface circuit (101), an SD card interface (102), a FLASH (103), a CPU LPC1768(104), an LCD display circuit (105), a heating control circuit (106), an air pump control circuit (107), an RS232 output (108) and a 4G DTU (109), and the particle concentration data acquisition control unit (1) is electrically connected with the external sensor (2) through the sensor interface circuit (101).
2. A data acquisition calibration control unit for particulate matter concentration measurement according to claim 1, characterized by: the particle concentration data acquisition control unit (1) takes an LPC1768 ARM processor as a core and is internally provided with a data acquisition unit with a multi-element and multi-sensor type interface; the particle concentration data acquisition control unit (1) is internally provided with a large-capacity Flash memory and an SD card data storage interface, and the sensor interface circuit (101) comprises RS232, RS485, analog voltage, current, pulse signals and the like.
3. A data acquisition calibration control unit for particulate matter concentration measurement according to claim 1, characterized by: particulate matter concentration data acquisition control unit (1) has wired (RS232 serial ports) and wireless (4G DTU) communication interface, satisfies different data transmission application demands, particulate matter concentration data acquisition control unit (1) has the display screen interface, can insert the LCD display screen, can show real-time measurement data and equipment status.
4. A data acquisition calibration control unit for particulate matter concentration measurement according to claim 1, characterized by: the external sensor (2) comprises a particulate matter sensor measuring module, a temperature and humidity sensor, a temperature sensor, an air pressure sensor and a flow sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120423602.3U CN214952882U (en) | 2021-02-26 | 2021-02-26 | Data acquisition calibration control unit for particulate matter concentration measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120423602.3U CN214952882U (en) | 2021-02-26 | 2021-02-26 | Data acquisition calibration control unit for particulate matter concentration measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214952882U true CN214952882U (en) | 2021-11-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120423602.3U Expired - Fee Related CN214952882U (en) | 2021-02-26 | 2021-02-26 | Data acquisition calibration control unit for particulate matter concentration measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214952882U (en) |
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2021
- 2021-02-26 CN CN202120423602.3U patent/CN214952882U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |