CN213120645U - Portable vehicle-mounted air quality monitoring device based on Internet of things - Google Patents
Portable vehicle-mounted air quality monitoring device based on Internet of things Download PDFInfo
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- CN213120645U CN213120645U CN202021920965.XU CN202021920965U CN213120645U CN 213120645 U CN213120645 U CN 213120645U CN 202021920965 U CN202021920965 U CN 202021920965U CN 213120645 U CN213120645 U CN 213120645U
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Abstract
The utility model provides a portable on-vehicle air quality monitoring devices based on thing networking, including the casing and be located the air monitering system of casing. The air monitoring system comprises an air detection air circuit, an environment air flow control structure is arranged on the air detection air circuit, an input end of the MCU controller is electrically connected with a gas flow meter module, an output end of the MCU controller is electrically connected with an air pump, and the environment air flow control structure is used for controlling the flow of environment air entering the air detection air circuit. Through set up environment air flow control structure on the air detection way, can make the air current flow of the environment air in the air detection way can accurate control, guaranteed the stability of monitoring data accuracy and device.
Description
Technical Field
The utility model belongs to the environmental monitoring field relates to ambient air quality monitoring technology, specifically is a portable on-vehicle air quality monitoring devices based on thing networking.
Background
With the rapid development of industry and transportation industry, a large amount of atmospheric pollutants are discharged into the air, which causes pollution to the atmospheric environment. Meanwhile, with the improvement of living standard of people, vehicles become one of necessities of life and travel of people, various pollutants are continuously generated in the driving process of the vehicles, the pollution to the atmospheric environment can be caused when the pollutants are discharged into the atmosphere, discomfort such as headache, dizziness, dyspnea and the like can be easily generated for people, and the pollutants are harmful to the health of human bodies. Therefore, how to accurately monitor the air quality of the current environment of people so as to perform real-time early warning has important significance on ensuring human health.
At present, most of the existing air quality monitoring is carried out by a monitoring station, and the monitoring station carries out monitoring on PM2.5/PM10 particulate matters, TVOC, CO and SO in the air2、NO2、O3、H2And S and other pollutants are detected to judge the quality of the air in the environment. However, most of the existing monitoring stations are fixed stations, which can only monitor the air environment in a certain large area range, and cannot monitor the pollutant data in the air environment of mobile (position-changing at any time) equipment in real time.
Although some monitoring devices applied to mobile equipment are used, the monitoring devices have the following problems in use:
1. monitoring devices is mostly the survey to single pollutant, if will realize the detection of multiple pollutant, then need set up a plurality of monitoring passageways, and monitoring devices's structure is more complicated, bulky, appears easily that it buckles and blocks up or damage the circumstances such as, influences monitoring devices measuring result and measurement of efficiency.
2. Most monitoring devices directly introduce ambient air into a detection channel for detection, air flow is not controlled, air flow in the detection channel is suddenly large and small, the detection channel is impacted by air flow due to the fact that the ambient air flow is large in the detection process, and a detection air channel is bent, blocked or damaged; the problem that the detection channel is blocked due to accumulation of particulate matters in the ambient air in the detection channel caused by small ambient air flow can also exist; the detection device needs to be maintained continuously, and the measurement result and the measurement efficiency of the monitoring device are seriously influenced.
3. When the sensor of monitoring devices needs to be calibrated, the air quality monitoring devices need to be taken to an enterprise or a calibration center with a standard calibration instrument for calibration, and the problems of time and labor waste, high cost and low efficiency are solved.
Therefore, it is desirable to design an on-board air quality monitoring device that facilitates vehicle use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a portable on-vehicle air quality monitoring devices based on thing networking, the utility model discloses a portable on-vehicle air quality monitoring devices can carry out real-time supervision to the ambient air of vehicle when different positions, can ensure the accuracy that the air circumstance data of vehicle current position detected and the stability of device.
The utility model discloses a set up ambient air flow control structure on the empty gas detection survey gas circuit for the empty gas detection surveys the air current flow of the ambient air in the gas circuit and can accurate control, has guaranteed the stability of monitoring data accuracy and device. Meanwhile, the air circuit design of the air detection air circuit is simplified by arranging various modularized detection modules in the air detection air circuit, so that the air detection air circuit is simpler, the monitoring device is more time-saving and labor-saving to disassemble and assemble, and the maintenance and assembly efficiency is improved
The technical scheme for realizing the purpose of the utility model is as follows: the utility model provides a portable on-vehicle air quality monitoring devices based on thing networking, includes the casing and is located the air monitering system of casing. The air monitoring system comprises an air detection air circuit, an environment air flow control structure is arranged on the air detection air circuit, an input end of the MCU controller is electrically connected with a gas flow meter module, an output end of the MCU controller is electrically connected with an air pump, and the environment air flow control structure is used for controlling the flow of environment air entering the air detection air circuit.
The working principle of the environment air flow control structure is as follows: the gas flow meter module detects the flow feedback signal of ambient air flow in the air detection gas circuit, and the MCU controller handles flow feedback signal to send the PWM ripples signal of different length to the air pump, in order to adjust the rotational speed of air pump, form through gas flow meter module, MCU controller, air pump three and carry out accurate closed-loop control to the flow of ambient air in the air detection gas circuit, improve the stability of ambient air in the air detection gas circuit.
The utility model discloses a set up ambient air flow control structure on the empty gas detection survey gas circuit, can make the air current flow of the ambient air in the empty gas detection survey gas circuit can accurate control, guaranteed the stability of monitoring data accuracy and device.
Wherein, it is right the utility model discloses an improvement of empty gas detection surveys the gas circuit still is equipped with a plurality of detection module on the empty gas detection surveys the gas circuit, and detection module is used for surveing the pollutant concentration of empty gas detection surveys the interior environment air of gas circuit. The detection module comprises a particulate matter sensor structure and a gas sensor structure which are sequentially arranged, the particulate matter sensor structure is arranged on the inner wall of an upper shell of the shell, the gas sensor structure is arranged on a mounting plate in the shell, the particulate matter sensor structure and the gas sensor structure are communicated through a pipeline, ambient air enters an air detection air path, is sequentially detected by the particulate matter sensor structure and the gas sensor structure, and is discharged through the air detection air path. Specifically, the particulate matter sensor structure is used for measuring the concentration of particulate matter within a certain diameter range in ambient air, such as particulate matter of PM2.5, PM10, TSP and the like; the gas sensor structure is used for measuring the concentration of each pollutant gas in the ambient air, such as TVOC, CO and SO2、NO2、O3、H2S and other pollutant gases. Through fixing the particulate matter sensor structure on the upper shell inner wall, fix the gas sensor structure on the mounting panel, can rationally and make full use of the space in the casing, reduce portable on-vehicle air quality monitoring device's volume.
Further, as an improvement to the gas sensor structure, the gas sensor structure includes a gas sensor layer fixed to the vent cover via a fixing member. Both ends of the ventilation cover are provided with air path joints, and the upper surface of the ventilation cover is provided with at least 2 grooves. The air path connector and the groove, and the adjacent grooves are communicated through an air path pipeline in the ventilation hood, and the air path connector, the air path pipeline and the grooves are communicated to form a detection air path of ambient air.
Specifically, the gas sensor layer includes 2 at least gas sensor that set gradually, and gas sensor installs on the recess, and forms between gas sensor's the lower surface and the bottom of recess and detect the chamber, and gas sensor is arranged in detecting the pollutant gas concentration in the gas circuit interior environment air. Form a holistic gas sensor layer through being no less than 2 gas sensor, install again on the cover of ventilating, realized gas sensor's modularization installation, improved the installation and the dismantlement efficiency of gas sensor structure.
The gas sensors are electrically connected with the gas sensor PCB, and the gas sensor PCB is fixed on the fixing component in a pressing mode.
The gas sensor is used for detecting the concentration of pollutant gas in the ambient air in the gas circuit, and the PCB of the gas sensor is used for converting the chemical signal of the concentration of the ambient air detected by the gas sensor into an electric signal.
Through carrying out compact integrated design with the gas sensor structure for the gas sensor structure can simplify mobile device air quality monitoring devices's structure, realizes the quick assembly of mobile device air quality monitoring devices. And simultaneously, the utility model discloses a gas sensor includes TVOC gas sensor, SO2Gas sensor, O3Gas sensor, NO2Gas sensors, CO gas sensors.
The working process of the detection module in the air detection gas circuit is as follows: ambient air enters an air detection gas circuit in the shell, and chemical signals of particulate matter concentration in the ambient air are detected through the particulate matter sensor structure and then detected through the gas sensor structureMeasuring TVOC, CO and SO in ambient air2、NO2、O3、H2S and the like, and finally discharging the chemical signals of the concentration of the pollutant gases out of the shell. Meanwhile, the detected chemical signal is transmitted to the server through the communication module or transmitted to the mobile terminal through the bluetooth module.
Further, as the improvement to the air detection gas circuit, after particulate matter concentration detection accomplished in the ambient air, in order to avoid the influence that physical properties particulate matter detected to gaseous composition in the ambient air, make ambient air flow control structure be located between particulate matter sensor structure and the gas sensor structure, ambient air flow control structure still includes the filter structure. The filter structure comprises a first filter, the air inlet end of the first filter is connected with the air outlet end of the particulate matter sensor structure through a pipeline, the air outlet end of the first filter is connected with the air inlet end of the air pump through a pipeline, and the first filter is used for filtering the ambient air entering the air pump and the air sensor structure for the first time. Physical gas particle impurity in the ambient air that first filter was to getting into in air pump and the gas sensor structure filters, blocks up the air pump in avoiding ambient air particulate matter impurity gets into the air pump and gets into the normal detection of influence each gas sensor in the gas sensor structure, can avoid particulate matter impurity to gather in the gas sensor structure simultaneously, improves the life of gas sensor structure, reduces its maintenance frequency. When ambient air detected, ambient air got into the empty gas detection survey gas circuit, detected particulate matter concentration through particulate matter sensor structure in proper order, and particulate matter filters in to ambient air in the first filter, and in the air pump inhaled empty gas detection survey gas circuit with ambient air, the gas sensor structure detected the back to each pollutant gas concentration in the ambient air, again through empty gas detection survey gas circuit discharge.
Preferably, the filter structure further comprises a second filter, an air inlet end of the second filter is connected with an air outlet end of the air pump through a pipeline, an air outlet end of the second filter is connected with an air inlet end of the gas flow meter module through a pipeline, and the second filter is used for filtering the ambient air entering the gas sensor structure for the second time. When ambient air detected, ambient air got into the empty gas detection survey gas circuit, detected particulate matter concentration through particulate matter sensor structure in proper order, and first filter carries out the primary filtration to particulate matter in the ambient air, and in the air pump inhaled empty gas detection survey gas circuit with ambient air, carried out the secondary filtration through second filter to particulate matter in the ambient air, and gas sensor structure detects the back to each pollutant gas concentration in the ambient air, again through empty gas detection survey gas circuit discharge.
Further, as right the utility model discloses the improvement of casing, casing include epitheca, inferior valve, form both ends open-ended box body after epitheca and inferior valve are connected, form the chamber that holds of empty gas detection survey gas circuit in the box body.
The outer wall of the upper shell is provided with a ventilation valve structure, and the ventilation valve structure is connected with the particle sensor structure through a pipeline.
The inferior valve is provided with a mounting plate on the inside in a detachable way, and the mounting plate is used for fixing the ambient air flow control structure and the gas sensor structure.
One end of the box body is provided with a first end cover, and an end cover sealing plate assembly is arranged on the first end cover.
The other end of the box body is provided with a second end cover, the inner wall of the second end cover is provided with a control unit, and the outer wall of the second end cover is provided with a display assembly and a control assembly which are electrically connected with the control unit.
Preferably, the outside both sides of inferior valve still are equipped with the equipment stabilizer blade respectively, and still are equipped with the stabilizer blade horizontal pole between the equipment stabilizer blade, and the equipment stabilizer blade forms on-vehicle support, and the stabilizer blade horizontal pole is used for spacing between on-vehicle support and the mobile device.
Preferably, still be equipped with rechargeable battery on the mounting panel, rechargeable battery outside covers and is equipped with the fixed cover of rechargeable battery, and rechargeable battery is connected with MCU controller, air pump, gas flow meter module, particulate matter sensor structure, gas sensor structure module respectively, rechargeable battery is used for providing the electric energy to MCU controller, air pump, gas flow meter module, particulate matter sensor structure, gas sensor structure to ensure portable on-vehicle air quality monitoring device's normal use.
Further, it is right as the utility model discloses the control unit's improvement, the control unit includes the PCB board, is equipped with communication module, orientation module on the PCB board. The communication module is electrically connected with the positioning module, and the positioning module is used for positioning the portable vehicle-mounted air quality monitoring device in real time and sending a position coordinate signal of the portable vehicle-mounted air quality monitoring device to the server through the communication module.
The communication module is also in bidirectional electric connection with a plurality of detection modules on the air detection gas circuit, is used for receiving detection data of the detection modules and sending the detection data to the server, and is also used for receiving detection module calibration signals sent by the server and sending the detection module calibration signals to the detection modules to remotely calibrate the detection modules.
The working principle of the control unit is as follows: the communication module on the PCB receives data signals of each pollutant from the detection module to detect the ambient air, receives position coordinate information of the mobile equipment monitored by the positioning module, and sends the position coordinate information to the server; the server calls the pollutant standard parameters of the air quality monitoring standard site, generates a calibration formula by comparing the pollutant standard parameters with each pollution measured by the air quality monitoring device without data, sends a detection module calibration signal to the communication module, and remotely calibrates the detection module.
Furthermore, the air monitoring system further comprises a temperature and humidity pressure sensor, a ventilation hole is formed in the lower shell of the shell, and the temperature and humidity pressure sensor can be detachably fixed on the ventilation hole. The temperature and humidity pressure sensor is communicated with the environment outside the portable vehicle-mounted air quality monitoring device and is used for measuring the temperature, the humidity and the atmospheric pressure of the detected ambient air. So that personnel can know the environmental information of the current position conveniently, and can calculate the altitude information of the current position according to the information.
Compared with the prior art, the beneficial effects of the utility model are that:
1. through set up environment air flow control structure on the air detection way, the air detection way that can realize is flow closed loop control for the environment air mass flow in the air detection way is more accurate and stable, can diagnose the state of the air current of environment air and air pump on the air detection way simultaneously according to the testing result of gas flowmeter module.
2. Through installing each detection module in the empty gas detection survey gas circuit in the different positions in the casing, make full use of the space of casing, make the setting of empty gas detection survey gas circuit in the device more succinct, make things convenient for the installation of device and the maintenance of each module in the later stage device simultaneously.
3. The setting of air pump in the ambient air flow control structure makes the ambient air get into the detection pipeline with the mode of pumping, guarantees the stability of air flow and the accuracy of sampling, has improved the degree of accuracy of monitoring result.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It should be apparent that the drawings in the following description are only for the purpose of illustrating the embodiments of the present invention or the technical solutions in the prior art more clearly, and that other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a perspective view of the portable vehicle-mounted air quality monitoring device of the present invention;
FIG. 2 is an exploded view of the portable vehicle-mounted air quality monitoring device of the present invention;
FIG. 3 is a schematic block diagram of an ambient air flow control structure of the portable vehicle-mounted air quality monitoring device of the present invention;
fig. 4 is a perspective view of the filter structure of the present invention;
fig. 5 is a schematic view of the installation of the module on the installation plate of the present invention;
fig. 6 is a perspective view of the gas sensor structure of the present invention;
FIG. 7 is a cross-sectional view of the connection between the vent cover and the gas sensor of the gas sensor structure of the present invention;
fig. 8 is a schematic view of the upper shell of the housing of the present invention;
fig. 9 is a schematic view of the lower shell of the housing of the present invention;
fig. 10 is a schematic view of a first end cap of the housing of the present invention;
fig. 11 is a schematic view of a second end cap of the housing of the present invention;
fig. 12 is a schematic block diagram of a control unit of the portable vehicle-mounted air quality monitoring device according to the present invention;
wherein, 1, a shell; 1-1. an upper shell; 1-2. a lower case; 1-3. a first end cap; 1-3-1. an end cap seal plate assembly; 1-4. a second end cap; 1-5. a handle; 1-6. an equipment stand bar; 1-7. a leg rail; a vent valve structure; 3. a gas flow meter module; 4. an air pump; 6. an antenna; 7. a particulate matter sensor structure; 7-1. riveting parts for the particulate matter sensor structure mounting plate; 8. a gas sensor structure; 801. a gas sensor layer; 802. a fixing assembly; 8021. a sensor gland; 8022. a sensor support; 8023. a screw; 803. a ventilation hood; 100. a groove; 101. a first cylindrical recess; 102. a second cylindrical recess; 200. a gas path pipeline; 300. an aperture; 804. a gas sensor PCB board; 805. a silica gel sealing gasket; 9, a temperature and humidity pressure sensor; 10. a filter arrangement; 10-1. a first filter; 10-2. a filter holder; 10-3. a second filter; 12. a switch; 13. an external power interface; 14. an indicator light; 1401. a power indicator light; 1402. a detection module indicator light; 1403. a communication module indicator light; 15. mounting a plate; 16, a PCB board; 1601, a PCB support; 17. a display screen circuit board; 18. a display screen; 19. hexagonal copper cylinder.
Detailed Description
The invention will be further described with reference to specific embodiments, the advantages and features of the invention will become more apparent as the description proceeds. These examples are merely illustrative and do not limit the scope of the invention in any way. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention, and that such changes and modifications are intended to be included within the scope of the invention.
In the description of the present embodiments, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to a number of indicated technical features. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the invention, the meaning of "a plurality" is two or more unless otherwise specified.
Example 1:
referring to fig. 1 and fig. 2, the present embodiment provides a portable vehicle-mounted air quality monitoring device based on the internet of things, and in the present embodiment, the portable vehicle-mounted air quality monitoring device includes a housing 1 and an air monitoring system located in the housing 1.
Wherein, air monitoring system includes the empty gas detection survey gas circuit, and empty gas detection surveys and is equipped with ambient air flow control structure on the gas detection survey gas circuit, as shown in fig. 3, ambient air flow control structure includes the MCU controller, and the input electricity of MCU controller is connected with gas flowmeter module 3, and the output electricity of MCU controller is connected with air pump 4, and ambient air flow control structure is used for controlling the flow that gets into the interior ambient air of empty gas detection survey gas circuit. In this embodiment, the gas flowmeter module 3, the gas pump 4 and the MCU controller are detachably fixed to the mounting plate 15 via brackets, respectively, and the mounting plate 15 is disposed on the bottom wall of the housing 1.
The working principle of the environment air flow control structure is as follows: as shown in fig. 3, the gas flowmeter module 3 detects the flow feedback signal of the ambient air flow in the air detection gas circuit, the MCU controller processes the flow feedback signal, and sends PWM wave signals of different lengths to the air pump 4, so as to adjust the rotation speed of the air pump 4, and through the gas flowmeter module 3, the MCU controller, the air pump 4 three, the flow of the ambient air in the air detection gas circuit is formed to perform precise closed-loop control, thereby improving the stability of the ambient air in the air detection gas circuit.
In this embodiment, the gas flow meter module 3, the gas pump 4 and the MCU controller are electrically connected to a rechargeable battery (not shown in the drawings) on the mounting plate 15, and a battery fixing cover covers the rechargeable battery to fix the rechargeable battery.
The working process of controlling the flow of the ambient air in the air detection gas circuit is as follows: the switch 12 is turned on, the air pump 4 and the gas flowmeter module 3 work, the gas flowmeter module 3 meters the airflow of the ambient air, and sends airflow flow signals to the MCU controller, the MCU controller sends PWM wave signals with different lengths to the air pump 4, and the rotating speed of the air pump 4 is changed.
Example 2:
in this embodiment, on the basis of embodiment 1, the air detection air path in embodiment 1 is improved, and a hose, such as a silicone hose, is used as a pipeline of the air detection air path. The flexible deformation of certain degree can be carried out to the hose way, when air quality monitoring device was located the mobile device in the moving, can avoid the condition that each detection module and pipeline junction appear leaking gas, improves the leakproofness of gaseous detection gas circuit.
The air detection gas circuit is provided with a plurality of detection modules, and the detection modules are used for measuring the pollutant concentration of the ambient air in the air detection gas circuit. The detection module comprises a particulate matter sensor structure 7 and a gas sensor structure 8 which are sequentially arranged, and the particulate matter sensor structure 7 is communicated with the gas sensor structure 8 through a pipeline.
When the ambient air is detected, the ambient air enters the air detection air path, is detected by the particulate matter sensor structure 7 and the gas sensor structure 8 in sequence, and is discharged through the air detection air path. The particle sensor structure 7 and the gas sensor structure 8 are also respectively electrically connected with a rechargeable battery, and the rechargeable battery provides electric energy for the particle sensor structure 7 and the gas sensor structure 8, so that the normal work of the particle sensor structure is ensured.
In the present embodiment, as shown in fig. 8, a particulate matter sensor structure 7 is provided on the inner wall of the upper casing 1-1 of the casing 4, and the particulate matter sensor structure 7 is used for measuring the concentration of particulate matter, such as PM2.5, PM10, TSP, etc., within a certain diameter range in the ambient air. Specifically, as shown in fig. 8, a particle sensor structure mounting plate riveting piece 7-1 is fixed on the inner wall of the upper shell 1-1 through a cross-recessed pan head screw, and an aluminum alloy 5052 plate is selected as the particle sensor structure mounting plate riveting piece 7-1, so that the detection of particles in ambient air is not affected. A particulate matter sensor structure 7 is fixed at the lower end of the mounting plate riveting piece 7-1 of the particulate matter sensor structure, the particulate matter sensor structure 7 comprises a PM2.5 sensor, a PM10 sensor and a TSP sensor, and the PM2.5 sensor is used for monitoring the concentration of PM2.5 in ambient air; the PM10 sensor is used to monitor the concentration of PM10 in the ambient air, and the TSP sensor is used to monitor the TSP concentration (TSP, i.e., total suspended particulate matter, also known as total suspended particulate matter) in the ambient air.
Example 3:
this embodiment is a detailed explanation of the gas sensor structure 8 of embodiment 2, as shown in fig. 5, the gas sensor structure 8 is disposed on a mounting plate 15 in the housing 1, and the gas sensor structure 8 is used for measuring the concentration of each pollutant gas, such as TVOC, CO, SO, in the ambient air2、NO2、O3、 H2S and other pollutant gases.
Specifically, as shown in fig. 6 and 7, the gas sensor structure 8 includes a gas sensor layer 801, and the gas sensor layer 801 is fixed to a ventilation cover 803 via a fixing member 802. A plurality of gas sensor all is connected with gas sensor PCB board 804 electricity, and gas sensor PCB board 804 crimping is fixed on fixed subassembly 802.
Both ends of the ventilation hood 803 are provided with air path joints, and the upper surface of the ventilation hood 803 is processed with at least 2 grooves 100. The air path joint and the groove 100, and the adjacent grooves 100 are communicated through an air path pipeline 200 in the ventilation hood 803, and the air path joint, the air path pipeline 200 and the grooves 100 are communicated to form a detection air path of ambient air. The gas sensor layer includes 2 at least gas sensor that set gradually, and gas sensor installs on recess 100, and forms between gas sensor's the lower surface and the bottom of recess 100 and detect the chamber, and gas sensor is arranged in detecting the pollutant gas concentration in the interior ambient air of gas circuit.
In the present embodiment, the ventilation hood 803 and the gas sensor are modified in the following manner. The recess 100 of gas sensor structure is cylindrical type recess, and gas sensor is cylindrical gas sensor, and the detection chamber that forms between the lower surface of cylindrical gas sensor and the bottom of cylindrical type recess is cylindrical detection chamber, and the accuracy that pollutant gas concentration detected can be ensured to the setting in cylindrical detection chamber.
As an improvement on the cylindrical groove, as shown in fig. 7, the cylindrical groove includes a first cylindrical groove 101, a set of symmetrical holes 300 is formed on an inner wall of the first cylindrical groove 101, the holes 300 are communicated with the gas path pipeline 200, and centers of the gas path pipeline 200, the holes 300 and the first cylindrical groove 101 are all on the same horizontal line. The lower part of cylindrical gas sensor is boss structure, and the boss of cylindrical gas sensor lower part inserts first cylindrical recess 101, encloses into cylindrical detection chamber between the diapire of first cylindrical recess 101, the boss lower surface of gas sensor, the periphery wall of first cylindrical recess 101. Due to the arrangement of the structure, on one hand, the path of the detection gas path can be shortened, and the detection efficiency is improved; on the other hand, the detected gas entering the first cylindrical groove 101 can be uniformly distributed in the detection cavity, and the detection precision of the concentration of the pollutant gas can be further improved.
As an improvement to the cylindrical groove, as shown in fig. 6 and 7, a second cylindrical groove 102 is formed on the outer periphery of the first cylindrical groove 101, and the second cylindrical groove is coaxial with the first cylindrical groove 101, and a silicone gasket 805 is fitted on the outer periphery of the boss of the cylindrical gas sensor. When the cylindrical gas sensor is mounted in the first cylindrical recess 101, the silicone gasket 805 is in close contact with the outer wall and the bottom wall of the second cylindrical recess 102. The arrangement of the silicone sealing gasket 805 enables the silicone sealing gasket 805 to seal the contact part when the gas sensor is installed in the groove 100 of the ventilation hood 803, so that the sealing performance is improved, and the influence of the sealing performance of the installation position of the gas sensor and the groove 100, the gas leakage phenomenon and the influence of the detection result caused by the influence of the impact of gas in the detection cavity or the movement process of the monitoring system are avoided.
In the present embodiment, in order to improve the efficiency of gas detection and shorten the length of the detection gas path to reduce the volume of the gas sensor structure, the following two designs are performed on the gas sensor layer 801 and the detection gas path.
One is that: in order to simplify the gas sensor structure 8 and accelerate the detection efficiency of the gas sensor structure 8, 2 detection gas paths are provided, the 2 detection gas paths are arranged in parallel, and the adapter connectors on the ventilation hood 803 are air inlet connectors and air outlet connectors. During detection of the ambient gas, the ambient gas enters from the gas inlet joint at one end of the ventilation hood 803 and is discharged from the gas outlet joint at the other end of the ventilation hood 803. The gas sensor layer 801 includes 5 gas sensors including TVOC gas sensor, SO2Gas sensor, O3Gas sensor, NO2Gas sensors, CO gas sensors. Specifically, one detection gas path is provided with 2 gas sensors, and the other detection gas path is provided with 3 gas sensors. In this embodiment, the positions and the sequence of the 5 gas sensors can be adjusted according to actual conditions.
The other is as follows: in order to simplify gas sensor structure 8 for gas sensor structure 8's detection efficiency makes and detects the gas circuit and has 1, and it is the U type to detect the gas circuit, and is concrete, and the gas circuit of ventilating cover 803 one end connects for the air inlet connector and give vent to anger and connect, and the gas circuit of ventilating cover 803 one end connects for the adapter coupling, and adjacent adapter coupling passes through the hose intercommunication. The gas sensor layer 801 includes 5 gas sensors including TVOC gas sensor, SO2Gas sensor, O3Gas sensor, NO2Gas sensor, CO gas sensor, for example, ambient gas enters through the inlet connection of the one end of the air vent cover 803, is detected by 2 gas sensors, then passes through the hose in the adapter connection of the other end of the air vent cover 803, is detected by the remaining 3 gas sensors, and then is discharged through the outlet connection of the air vent cover 803, so that the length and the volume of the air vent cover 803 can be greatly reduced, and the air vent is reducedThe raw material cost of the cover 803 reduces the volume of the monitoring system.
The gas sensors are used for detecting chemical signals of various pollutant gases in the ambient air, converting the detected chemical signals of various pollutant concentrations into electric signals through respective gas sensor PCB 804, calculating the concentration of the pollutant gases, and sending the electric signals to the server through the communication module or sending the electric signals to the mobile terminal through the Bluetooth module.
As shown in fig. 6, the fixing assembly 802 includes several groups of strut assemblies on the ventilation hood 803, each group of strut assemblies corresponding to one gas sensor.
Specifically, as shown in fig. 6, each group of pillar assemblies includes at least 2 sensor pillars 8022, the sensor pillars 8022 of each group of pillar assemblies are distributed around the gas sensor with the gas sensor as a center, and blind holes (not shown in the drawings) with internal threads are processed at the tops of the sensor pillars 8022. The fixing component 802 includes a sensor cover 8021, and the sensor cover 8021 is provided with a through hole corresponding to the blind hole of the sensor support 8022. Screws 8023 pass through the through holes and thread into the blind holes to fixedly attach the gas sensor layer to the vent hood 803.
Preferably, a gap is formed between the top of the sensor support 8022 and the lower surface of the sensor cover 8021. The clearance is arranged, when the sensor gland 8021 is fixed on the sensor support 8022, the gas sensor is pressed downwards to have downward pressure on the silica gel sealing gasket, so that the silica gel sealing gasket is elastically deformed, and the gas sensor is tightly contacted with the ventilation cover to achieve a sealing effect.
Preferably, as the further improvement to sensor pillar 8022, sensor pillar 8022 is the copper post, and the copper post has the advantage that the heat conductivity is strong, intensity is good, can carry out fine making to gas sensor, and makes the heat rapid dissipation on the gas detection gas cover.
Preferably, as an improvement on the sensor gland 8021, the sensor gland 8021 is made of ABS engineering plastic, which is also called ABS material, and is one of five synthetic resins, and the ABS engineering plastic is excellent in impact resistance, heat resistance, low temperature resistance, chemical resistance, and electrical performance, and has the characteristics of easy processing, stable product size, low cost, and the like.
This embodiment is through fixing particulate matter sensor structure 7 on upper casing 1-1 inner wall, fixes gas sensor structure 8 on the mounting panel, can rationally and make full use of the space in the casing 1, reduces portable on-vehicle air quality monitoring device's volume for air quality monitoring device portable.
Example 4:
this embodiment is to improve the empty gas detection survey gas circuit of embodiment 3, after particulate matter concentration detection accomplishes in ambient air, in order to avoid the influence that physical property particulate matter detected gaseous composition in to ambient air, simultaneously, on the basis of simplifying empty gas detection survey gas circuit structure, avoid particulate matter impurity in the ambient air to block up and even damage air pump 4 and gas sensor structure 8. The ambient air flow control structure of embodiment 1 is provided between the particulate matter sensor structure 7 and the gas sensor structure 8, and a filter structure 10 is provided on the ambient air flow control structure, the filter structure 10 being used to filter the ambient air that enters the air pump 4 and the gas sensor structure 8. At the same time, the filter arrangement 10 is electrically connected to a rechargeable battery, which provides electrical power to the filter arrangement 10 to ensure its proper operation.
As shown in fig. 4, the filter structure 10 includes a first filter 10-1, in this embodiment, the first filter 10-1 is fixed to a filter holder 10-2 by screws, the filter holder 10-2 is formed in a double-layered structure by an upper plate, a middle plate, and a base, the first filter 10-1 is located at one layer, and the filter holder 10-2 is detachably fixed to a base plate 15. The air inlet end of the first filter 10-1 is connected with the air outlet end of the particulate matter sensor structure 7 through a pipeline, the air outlet end of the first filter 10-1 is connected with the air inlet end of the air pump 4 through a pipeline, and the first filter 10-1 is used for filtering the ambient air entering the air pump 4 and the gas sensor structure 8 for the first time. Physical gas particle impurities in the ambient air entering the air pump 1 and the gas sensor structure 8 are filtered by the first filter 10-1, so that the situation that the particulate impurities in the ambient air enter the air pump 4 to block the air pump 4 and enter the gas sensor structure 8 to influence normal detection of each gas sensor is avoided, meanwhile, the particulate impurities are prevented from accumulating in the gas sensor structure 8, the service life of the gas sensor structure 8 is prolonged, and the overhauling frequency of the gas sensor structure is reduced.
The gas flow direction of the ambient air in the air detection gas circuit formed by the particulate matter sensor structure 7, the gas sensor structure 8 and the ambient air flow control structure is as follows: intake valve 2 → particulate matter sensor structure 7 → first filter 10-1 → air pump 4 → gas flow meter module 3 → gas sensor structure 8 → exhaust valve. The working process of the detection module in the air detection gas circuit is as follows: ambient air enters an air detection air path through an air inlet valve 2 on the shell 1, and a chemical signal of the concentration of particles in the ambient air is detected through a particle sensor structure 7; then the air flow in the air detection gas path is controlled by the ambient air flow control structure, and the ambient air entering the air pump 4 and the gas sensor structure is filtered; then the TVOC, CO and SO in the ambient air are detected through the gas sensor structure 82、NO2、O3、H2S and other chemical signals of the concentration of pollutant gases; and finally, the gas is discharged out of the shell 1 through a gas outlet valve on the shell 1. Meanwhile, the detected chemical signal is transmitted to the server through the communication module or transmitted to the mobile terminal through the bluetooth module.
Further, as shown in fig. 4, the filter structure 10 includes a first filter 10-1 and a second filter 10-3, and the first filter 10-1 and the second filter 10-3 are respectively fixed to the filter holder 10-2 having a double-layer structure by screws. Wherein, the air inlet end of the first filter 10-1 is connected with the air outlet end of the particulate matter sensor structure 7 through a pipeline, and the air outlet end of the first filter 10-1 is connected with the air inlet end of the air pump 4 through a pipeline; the air inlet end of the second filter 10-3 is connected with the air outlet end of the air pump 4 through a pipeline, and the air outlet end of the second filter 10-3 is connected with the air inlet end of the gas flowmeter module 3 through a pipeline. The first filter 10-1 is used for a first filtering of the ambient air entering the air pump 4 and the gas sensor arrangement 8, and the second filter 10-3 is used for a second filtering of the ambient air entering the gas sensor arrangement 8.
Above-mentioned particulate matter sensor structure7. The gas flow direction of the ambient air in the air detection gas circuit formed by the gas sensor structure 8 and the ambient air flow control structure is as follows: intake valve 2 → particulate matter sensor structure 7 → first filter 10-1 → air pump 4 → second filter 10-3 → gas flow meter module 3 → gas sensor structure 8 → exhaust valve. The working process of the detection module in the air detection gas circuit is as follows: ambient air enters an air detection air path through an air inlet valve 2 on the shell 1, and a chemical signal of the concentration of particles in the ambient air is detected through a particle sensor structure 7; the air flow in the air detection air path is controlled by the ambient air flow control structure, the ambient air entering the air pump 4 is firstly filtered by the first filter 10-1, and the ambient air entering the air sensor structure 8 is secondly filtered by the second filter 10-3 after being output by the air pump 4; then the TVOC, CO and SO in the ambient air are detected through the gas sensor structure 82、NO2、O3、H2S and other chemical signals of the concentration of pollutant gases; and finally, the gas is discharged out of the shell 1 through a gas outlet valve on the shell 1. Meanwhile, the detected chemical signal is transmitted to the server through the communication module or transmitted to the mobile terminal through the bluetooth module.
As shown in fig. 9, as an improvement of the air monitoring system, the air monitoring system further includes a temperature and humidity pressure sensor 9, a vent hole is formed in the lower shell 1-2 of the housing 1, and the temperature and humidity pressure sensor 9 is detachably fixed to the vent hole through a screw. The temperature and humidity pressure sensor 9 is electrically connected with the communication module through the temperature and humidity pressure sensor circuit board, in this embodiment, the temperature and humidity pressure sensor 9 is further electrically connected with the rechargeable battery, and the rechargeable battery provides electric energy for the temperature and humidity pressure sensor 9 to ensure normal operation thereof. The temperature and humidity sensor 9 is used for measuring the temperature, humidity and atmospheric pressure of the detected ambient air, so that the personnel can know the ambient information of the current position conveniently, and can calculate the altitude information of the current position according to the information.
Example 5:
this embodiment specifically describes the case 1 of the portable vehicle-mounted air quality monitoring device of embodiments 1 to 4.
As shown in fig. 2, the casing 1 includes an upper casing 1-1 and a lower casing 1-2, the upper casing 1-1 and the lower casing 1-2 are connected to form a box body with two open ends, and a containing cavity of the air detection air passage is formed in the box body. In this embodiment, the upper case 1-1 and the lower case 1-2 are made of aluminum alloy 2a12, and the inner and outer surfaces thereof are subjected to a fine sand blasting matte anodic oxidation treatment.
Preferably, as shown in fig. 7, a handle 1-5 is provided on the upper case 1-1, the handle 1-5 is an aluminum alloy handle, the surface is a matte color, and the handle is fixed on the upper case 1-1 by a double-sided tooth lock washer and a hexagon socket head cap screw.
In this embodiment, as shown in fig. 8, a vent valve structure 2 is disposed on an outer wall of the upper casing 1-1, and the vent valve structure 2 is communicated with an air inlet end of the air detection path. Specifically, the method comprises the following steps. The vent valve structure 2 comprises a vent valve top, a vent valve component, an O-shaped ring and a vent valve seat, wherein the vent valve component penetrates through a small hole in the upper shell 1-1 to be in threaded connection with the vent valve seat on the inner side of the upper shell 1-1. The top of the vent valve is made of an aluminum alloy 2A12 material, and the surface of the vent valve is oxidized by a fine sand spraying matte anode, so that the vent valve has a rainproof function; a filter screen is arranged in the ventilation valve assembly, and can filter impurities such as mosquitoes, large-particle dust, catkin and the like in the ambient air entering the air detection air path; the O-shaped ring is a fluororubber sealing ring, and can improve the tightness and the sealing property of the connection between the vent valve structure 2 and the upper shell 1-1.
In this embodiment, as shown in fig. 2, an installation plate 15 is detachably disposed on the inner upper portion of the lower case 1-2, the installation plate 15 is an aluminum alloy plate with a model number of 5052, and the installation plate 15 is used for fixing each module on the air detection air path. As shown in fig. 5, the gas flow meter module 3 on the air detection air path, the air pump fixing frame of the air pump 4, the filter holder 10-2, the ventilation hood 803, the rechargeable battery, etc. are all fixed on the mounting plate 15 by cross-recessed pan head screws (M3 × 6, material is 304 stainless steel) and double-sided tooth lock washers. Wherein, the periphery of the upper part of the lower shell 1-2 is also provided with a sealing strip which is used for improving the sealing performance of the joint of the upper shell 1-1 and the lower shell 1-2.
As an improvement on the lower case 1-2, as shown in fig. 9, the two sides of the exterior of the lower case 1-2 are respectively provided with equipment support legs 1-6, and support leg cross bars 1-7 are further arranged between the equipment support legs 1-6, the equipment support legs 1-6 form a vehicle-mounted support, and the support leg cross bars 1-7 are used for limiting the position between the vehicle-mounted support and the mobile equipment. Specifically, the equipment support legs 1-6 and the support leg cross rods 1-7 are made of 304 stainless steel materials.
As shown in figure 2, one end of the box body is provided with a first end cover 1-3, and the other end of the box body is provided with a second end cover 1-4.
In this embodiment, as shown in FIG. 10, an O-ring (made of a fluororubber material having an outer diameter of 165. times. a filament diameter of 1.9) is provided on the outer periphery of the first cap 1-3 to improve the sealing and waterproof properties between the first cap 1-3 and the case. The first end cover 1-3 is provided with an end cover sealing plate assembly 1-3-1, the end cover sealing plate assembly comprises an inner sealing plate and an outer sealing plate, an O-shaped ring (with the specification of 73 inner diameter multiplied by 2.5 thread diameter and made of fluororubber material) is arranged between the inner sealing plate and the outer sealing plate, and the O-shaped ring is used for improving the sealing performance of the end cover sealing plate assembly 1-3-1.
In this embodiment, as shown in fig. 11, a control unit of the portable vehicle-mounted air quality monitoring device is disposed on an inner wall of the second end cap 1-4, and a display component and a control component electrically connected to the control unit are disposed on an outer wall of the second end cap 1-4. The PCB board 16 of the control unit is fixed on the PCB board support 1601, the PCB board support 1601 is fixed on the inner wall of the second end cap 1-4 via screws, and at the same time, the PCB board 16 is electrically connected with the display component on the outer wall of the second end cap 1-4, such as the indicator lamp 14 (including the power indicator lamp 1401, the sensor module component indicator lamp 140, and the communication module indicator lamp 1403), and is electrically connected with the control component, such as: an external power interface 13 and a switch 12. One end of a display screen circuit board 17 of the control unit is electrically connected with the PCB 16 through a hexagonal copper column 19 (with the specification of M3 multiplied by 12+6), and the other end is electrically connected with a display screen 18 on the outer wall of the second end cover 1-4.
In this embodiment, the first end cap 1-3 and the second end cap 1-4 are fixed to two ends of the box body by end cap screws, which are 304 stainless steel cross recessed pan head screws M4 × 8 in this embodiment.
Example 6:
in this embodiment, a further optimization is performed on the basis of embodiments 1 to 5, please refer to fig. 12, the air quality monitoring system further includes a control unit, the control unit includes a PCB 16, and the PCB 16 is fixed in the housing 1 through a PCB support 1601.
The PCB 16 is provided with a communication module and a positioning module, the positioning module is electrically connected with the communication module, and the positioning module is used for positioning the air quality monitoring device of the mobile equipment in real time and sending a position coordinate signal of the air quality monitoring device of the mobile equipment to the server through the communication module. The communication module is also in bidirectional electric connection with a plurality of detection modules on the air detection gas circuit, is used for receiving detection data of the detection modules and sending the detection data to the server, and is also used for receiving detection module calibration signals sent by the server and sending the detection module calibration signals to the detection modules to remotely calibrate the detection modules.
The working principle of the control unit is as follows: the communication module on the PCB 16 receives data signals of each pollutant from the detection module to detect the ambient air, receives position coordinate information of the mobile device monitored by the positioning module, and sends the position coordinate information to the server; the server calls the pollutant standard parameters of the air quality monitoring standard site, generates a calibration formula by comparing the pollutant standard parameters with each pollution measured by the air quality monitoring device without data, sends a detection module calibration signal to the communication module, and remotely calibrates the detection module.
Example 7:
the present embodiment is a further improvement on embodiment 6, and as shown in fig. 12, a communication module and a positioning module are disposed on the PCB 16. The PCB 16 is fixed on the housing 1 through the PCB support 1601, and the PCB support 1601 is made of an aluminum alloy material.
Wherein, communication module and detection module electricity are connected, and PCB board 16 transmits the various pollutant data in the ambient air that detection module monitored to the server through communication module, simultaneously, when each sensor remote calibration of device, realizes the calibration of sensor through PCB board 16.
In this embodiment, the communication module is 4G/3G/2G, and the data of the pollutants detected by the sensor is transmitted to the server through the communication module and the antenna 6.
Further, an antenna 6 is further arranged on the upper shell 1-1 of the shell 1, and the antenna 6 is electrically connected with the communication module. The antenna 6 is used for assisting the positioning module to acquire position coordinate signals of longitude and latitude of the air quality monitoring device; the auxiliary communication module sends an ambient air electric signal and a position coordinate signal; and the auxiliary communication module receives a detection module calibration signal sent by the server.
In the present embodiment, the antenna 6 is preferably a GPS +4G/3G/2G antenna.
Further, still be equipped with bluetooth module on the PCB board 16, bluetooth module is connected with the detection module electricity for with the detection data transmission that the detection module detected to mobile terminal, like cell-phone, panel computer etc. to make things convenient for personnel to look over various data information in time through mobile terminal. For example, when mobile terminal is the cell-phone, the air flow data that various pollutant data and gas flowmeter module that bluetooth module detected the detection module detects upload to the APP of cell-phone, make things convenient for personnel to look over various data information in real time.
Furthermore, a storage module is arranged on the PCB 16, an input end of the storage module is electrically connected with the detection module, an output end of the storage module is electrically connected with the communication module and the Bluetooth module, and the storage module is used for caching detection data sent to the communication module and the Bluetooth module by the detection module.
The PCB 16 is also provided with a power supply module, the output end of the power supply module is electrically connected with the rechargeable battery on the mounting plate 15, and the rechargeable battery is preferably a rechargeable lithium rechargeable battery, has light weight and low density, and is suitable for various mobile devices. The rechargeable battery provides electric energy for the device, and normal starting of the device and normal work of the detection module and the air pump 4 are ensured. The input end of the power supply module is also electrically connected with an external power supply interface 13 on the second end cover 1-4, so that a rechargeable battery can be charged through an external direct-current power supply or a vehicle-mounted cigarette lighter through the power supply module; meanwhile, the rechargeable battery is also electrically connected with a switch 12 on the shell 1, and the switch 12 is used for controlling the starting and the closing of the device.
In this embodiment, the positioning module is preferably a GNSS positioning module, which can be based on GPS and beidou positioning and uploads the position coordinate signal to the server. And the server simultaneously reads the pollutant value of the air quality monitoring standard site, so that the remote calibration of the sensor is realized. Through the setting of positioning module, can realize the remote calibration to each sensor of mobile device air quality monitoring devices, avoid purchase calibration instrument or to having the structure of calibration instrument in to carry out remote calibration to mobile device air quality monitoring devices, improve the convenience and the efficiency of mobile device air quality monitoring devices calibration, reduced calibration cost
As shown in fig. 4, the control unit further includes a display circuit board 17, an input end of the display circuit board 17 is electrically connected to the communication module, the positioning module and the rechargeable battery, an output end of the display circuit board 17 is electrically connected to the display screen 18, and the display circuit board 17 and the display screen 18 are arranged to enable a user to look up various pollution index values of ambient air in the mobile device and an electric quantity of the rechargeable battery at any time, so as to take corresponding processing measures in time to improve the quality of the air environment in the vehicle.
As a further improvement of the air quality monitoring device of the mobile device, as shown in fig. 1 and fig. 11, in order to facilitate the display and find out the abnormal condition of the operation of the air quality monitoring device in time, an indicator lamp 14 is further disposed on the second end cap 1-4, wherein the indicator lamp 14 at least includes a power indicator lamp 1401, a detection module indicator lamp 1402 and a communication module indicator lamp 1403. Specifically, a power indicator 1401, a detection module indicator 1402 and a communication module indicator 1403 are all connected with an indicator circuit board, wherein the power indicator 1401 indicates whether the device works normally; the communication module indicator light 1403 indicates whether the communication module is operating normally or not; the detection module indicates the light 1402 and indicates whether the detection module is working normally or not.
The working principle of the control unit is as follows: when the air quality monitoring device works, the detection module uploads various detected monitoring data into the communication module, the monitoring data are sent to the server through the communication module (or the communication module and the antenna 6), and the monitoring data can also be sent to the mobile terminal through the Bluetooth module.
When each detection module of the air quality monitoring device is calibrated, the air quality monitoring device is placed at an air quality monitoring standard site accessory, the positioning module and the communication module send position coordinate signals of the mobile equipment to the server, and meanwhile, the communication module (or the communication module and the antenna 6) sends pollutant signals detected by the air quality monitoring device to the server; the server calls the pollutant standard parameters of the air quality monitoring standard site which are consistent with the position of the mobile equipment, and the pollutant standard parameters are compared with each pollution measured by the air quality monitoring device without data to generate a calibration formula; the server sends a detection module calibration signal to the communication module and remotely calibrates the detection module.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. The utility model provides a portable on-vehicle air quality monitoring device based on thing networking, includes the casing and is located the air monitering system of casing, its characterized in that: the air monitoring system comprises an air detection air path, an ambient air flow control structure is arranged on the air detection air path and comprises an MCU (microprogrammed control unit) controller, the input end of the MCU controller is electrically connected with a gas flow meter module, the output end of the MCU controller is electrically connected with an air pump, and the ambient air flow control structure is used for controlling the entering of the ambient air flow in the air detection air path.
2. The portable vehicle air quality monitoring device of claim 1, wherein: the air detection gas circuit is also provided with a plurality of detection modules, and the detection modules are used for determining the concentration of pollutants in the ambient air in the air detection gas circuit;
the detection module comprises a particulate matter sensor structure and a gas sensor structure which are sequentially arranged, and the particulate matter sensor structure is communicated with the gas sensor structure through a pipeline;
ambient air enters the air detection air path, passes through the particulate matter sensor structure in proper order the gas sensor structure is detected the back, passes through again the air detection air path is discharged.
3. The portable vehicle air quality monitoring device of claim 2, wherein: the gas sensor structure comprises a gas sensor layer, and the gas sensor layer is fixed on the ventilation cover through a fixing component;
the two ends of the ventilation hood are provided with air path joints, and the upper surface of the ventilation hood is provided with at least 2 grooves; the air path joint is communicated with the grooves and the adjacent grooves through an air path pipeline positioned in the ventilation hood, and the air path joint, the air path pipeline and the grooves are communicated to form a detection air path of ambient air;
the gas sensor layer comprises at least 2 gas sensors which are sequentially arranged, the gas sensors are arranged on the grooves, a detection cavity is formed between the lower surfaces of the gas sensors and the bottoms of the grooves, and the gas sensors are used for detecting the concentration of pollutant gas in the ambient air in the gas circuit;
the gas sensors are all electrically connected with a gas sensor PCB, and the gas sensor PCB is fixedly connected to the fixing component in a pressing mode; the gas sensor PCB is used for converting a concentration chemical signal of the ambient air detected by the gas sensor into an electric signal.
4. The portable vehicle air quality monitoring device according to claim 2 or 3, wherein: the ambient air flow control structure is located between the particulate matter sensor structure and the gas sensor structure, and the ambient air flow control structure further comprises a filter structure;
the filter structure comprises a first filter, the air inlet end of the first filter is connected with the air outlet end of the particulate matter sensor structure through a pipeline, the air outlet end of the first filter is connected with the air inlet end of the air pump through a pipeline, and the first filter is used for filtering the ambient air entering the air pump and the air sensor structure for the first time;
ambient air enters the air detection air path, passes through the particulate matter sensor structure, the first filter, the air pump, after the gas sensor structure detects, the air detection air path discharges again.
5. The portable vehicle air quality monitoring device of claim 4, wherein: the filter structure further comprises a second filter, the air inlet end of the second filter is connected with the air outlet end of the air pump through a pipeline, the air outlet end of the second filter is connected with the air inlet end of the gas flowmeter module through a pipeline, and the second filter is used for carrying out secondary filtration on ambient air entering the gas sensor structure;
ambient air enters the air detection air path, passes through the particulate matter sensor structure, the first filter, the air pump, the second filter and the air sensor structure in sequence, and is discharged through the air detection air path after detection.
6. The portable vehicle air quality monitoring device of claim 4, wherein: the shell comprises an upper shell and a lower shell, the upper shell and the lower shell are connected to form a box body with two open ends, and an accommodating cavity of the air detection air path is formed in the box body;
a vent valve structure is arranged on the outer wall of the upper shell and connected with the particulate matter sensor structure through the pipeline;
the mounting plate is detachably arranged on the inner wall of the lower shell and used for fixing the ambient air flow control structure and the gas sensor structure;
a first end cover is arranged at one end of the box body, and an end cover sealing plate assembly is arranged on the first end cover;
the other end of the box body is provided with a second end cover, the inner wall of the second end cover is provided with a control unit, and the outer wall of the second end cover is provided with a display assembly and a control assembly which are electrically connected with the control unit.
7. The portable vehicle air quality monitoring device of claim 6, wherein: the outside both sides of inferior valve still are equipped with the equipment stabilizer blade respectively, just still be equipped with the stabilizer blade horizontal pole between the equipment stabilizer blade, the equipment stabilizer blade forms on-vehicle support, the stabilizer blade horizontal pole is used for right spacing between on-vehicle support and the mobile device.
8. The portable vehicle air quality monitoring device of claim 6, wherein: still be equipped with rechargeable battery on the mounting panel, rechargeable battery outside cover is equipped with the fixed cover of rechargeable battery, just rechargeable battery respectively with the MCU controller the air pump gas flowmeter module the particulate matter sensor structure the gas sensor structure module is connected, rechargeable battery is used for right the MCU controller the air pump gas flowmeter module the particulate matter sensor structure the gas sensor structure provides the electric energy.
9. The portable vehicle air quality monitoring device of claim 6, wherein: the control unit comprises a PCB, and a positioning module and a communication module are arranged on the PCB; the positioning module is electrically connected with the communication module and used for positioning the portable vehicle-mounted air quality monitoring device in real time and sending a position coordinate signal of the portable vehicle-mounted air quality monitoring device to the server through the communication module;
the communication module is also in bidirectional electric connection with a plurality of detection modules on the air detection gas circuit, and is used for receiving the detection data of the detection modules and sending the detection data to the server, and the communication module is also used for receiving the detection module calibration signals sent by the server and sending the detection module calibration signals to the detection modules, and the detection modules are remotely calibrated.
10. The portable vehicle air quality monitoring device of claim 1, wherein: the air monitoring system also comprises a temperature and humidity pressure sensor, a vent hole is formed in the lower shell of the shell, and the temperature and humidity pressure sensor is detachably fixed on the vent hole;
the temperature and humidity pressure sensor is communicated with the environment outside the portable vehicle-mounted air quality monitoring device and is used for measuring the temperature, the humidity and the atmospheric pressure of the detected ambient air.
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| CN202021920965.XU CN213120645U (en) | 2020-09-04 | 2020-09-04 | Portable vehicle-mounted air quality monitoring device based on Internet of things |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567620A (en) * | 2021-07-13 | 2021-10-29 | 重庆亿森动力环境科技有限公司 | Outdoor miniature air monitoring device |
| CN114019116A (en) * | 2022-01-10 | 2022-02-08 | 云图启迪(南京)科技有限公司 | Gas monitoring devices is pressed in controllable control by temperature change |
-
2020
- 2020-09-04 CN CN202021920965.XU patent/CN213120645U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113567620A (en) * | 2021-07-13 | 2021-10-29 | 重庆亿森动力环境科技有限公司 | Outdoor miniature air monitoring device |
| CN114019116A (en) * | 2022-01-10 | 2022-02-08 | 云图启迪(南京)科技有限公司 | Gas monitoring devices is pressed in controllable control by temperature change |
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Address after: 100160 606, 6th floor, building 1, courtyard 8, Automobile Museum West Road, Fengtai District, Beijing Patentee after: Beijing Yingshi Ruida Technology Co.,Ltd. Address before: 100160 606, 6th floor, building 1, courtyard 8, Automobile Museum West Road, Fengtai District, Beijing Patentee before: BEIJING INSIGHTS VALUE TECHNOLOGY Co.,Ltd. |