Portable motor vehicle tail gas detection equipment

Abstract

The utility model belongs to the technical field of automobile exhaust detection, and relates to a portable motor vehicle exhaust detection device which comprises a control system and a detection box, a display screen, a switch and a power port are arranged on the front portion of the detection box, and the display screen, the switch and the power port are all connected with the control system. An OBD communication interface, a sample gas inlet, a sample gas outlet and an adjustable tee joint are arranged on the rear portion of the detection box, the OBD communication interface is connected with the control system, and the detection box is further provided with a detection calibration assembly. By arranging the calibration assembly, the detection equipment can be calibrated before detection, the precision of each detection result can be ensured, the deviation of the detection result caused by the residual tail gas in the last detection is avoided, and meanwhile, the filtering module and the drying module are also arranged to filter out large particles and remove water, so that the precision of the result is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of motor vehicle exhaust gas detection, and relates to a portable motor vehicle exhaust gas detection device. Background Art

[0002] The exhaust gas emission of motor vehicles is one of the important sources of air pollution. The particulate matter in the exhaust gas of motor vehicles needs to meet the emission standards. At present, most of the detection of exhaust gas still requires fixed-point monitoring, and specific devices and equipment are needed for detection and analysis to provide direct basis for environmental law enforcement and decision-making.

[0003] The existing Chinese utility model patent with the publication number of CN219475526U, a movable and portable fuel cell vehicle exhaust gas detection platform, includes a box body, a control operation panel arranged in the middle of the box body, a data processing and display device and various control and communication interfaces, and a sampling and analysis device, an adjustable sampling lifting device, a sampling probe, and a charger embedded in the rigid foam cotton mold grooves on the left and right sides of the box body; the box body and the box cover are connected by a hinge, and a buckle is installed on the side of the box body and the box cover away from the hinge, and the box cover is filled with rigid foam cotton; a control operation panel is fixedly arranged in the middle of the box body, and an embedding port for the display data processing and display device is opened in the central area of the control operation panel. A probe switch, a communication interface, a charging interface, a data transmission interface, and a CAN signal output interface are fixedly arranged in the lower area of the central area; rigid foam cotton is arranged on both the left and right sides of the control operation panel in the box body and is flush with its upper surface, and several mold grooves are opened thereon, and the mold grooves are used for placing an adjustable sampling lifting device, a sampling and analysis device, a sampling probe, a charger or other components; a communication conversion system, a CAN signal processing module, and a standby power supply are also fixedly arranged in the box body below the control operation panel; the communication interface is electrically connected to the input port of the communication conversion system, the output port of the communication conversion system is electrically connected to the input port of the display device, the output port of the display device is electrically connected to the input port of the CAN signal processing module, the output port of the CAN signal processing module is electrically connected to the CAN signal output interface, the charging interface is simultaneously electrically connected to the standby power supply and the data processing and display integrated machine, and the standby power supply is also electrically connected to the probe switch.

[0004] Defects of the Existing Technology:

[0005] The above technical solution lacks a calibration gas calibration component, which is likely to affect the detection accuracy after multiple different exhaust gas detections. Moreover, when detecting outdoors at a relatively low temperature, the temperature of the exhaust gas drops rapidly after being discharged, and the exhaust gas cannot be detected at an appropriate temperature, thus affecting the detection accuracy. Content of the Utility Model

[0006] The technical problem to be solved by the utility model is to overcome the deficiencies of the existing technology and provide a portable motor vehicle exhaust gas detection device.

[0007] The portable motor vehicle exhaust gas detection device described in this utility model includes a control system and a detection box. A display screen, a switch, and a power port are provided at the front of the detection box. The display screen, the switch, and the power port are all connected to the control system. An OBD communication interface, a sample gas inlet, a sample gas outlet, and an adjustable three-way joint are provided at the rear of the detection box. The OBD communication interface is connected to the control system. The detection box also has a detection and calibration component; the detection and calibration component includes a standard gas inlet, a standard gas outlet, a standard gas flowmeter provided at the rear of the detection box, and a gas signal calibration module provided inside the detection box. The gas signal calibration module is connected to the control system, and an adjustment knob is provided on the standard gas flowmeter; an NDIR module, a temperature and humidity sensor, a gas sensor, a filtering module, and a sample gas drying module are provided inside the detection box. The NDIR module, the temperature and humidity sensor, the gas sensor, the filtering module, and the sample gas drying module are all connected to the control system.

[0008] Working process or principle:

[0009] During use, the entire device is powered through the power port. The device is started through the switch for preheating and calibration. A standard gas cylinder is connected to the standard gas outlet, and a recovery gas pipe is connected to the standard gas outlet. The standard gas is pumped into the detection box by the air pump in the detection box and calibrated through the gas signal calibration module to ensure the detection accuracy of the control system. Then, one end of the exhaust gas collection probe is connected to the sample gas inlet, and the other end of the probe is placed in the vehicle exhaust pipe to collect the exhaust gas. By rotating the adjustable three-way joint, the sample gas is pumped into the detection box by the air pump and sequentially passes through the filtering module, the drying module, and the temperature and humidity sensor to remove particulate matter and water vapor, and then passes through the NDIR module and the gas sensor for detection and analysis of the sample gas. The detection results are displayed on the display screen through the control system. After the detection is completed, it is discharged through the sample gas exhaust port.

[0010] A dust-proof cover is provided at the power port.

[0011] A fan is provided at the rear of the detection box.

[0012] A handle is provided on the top of the detection box.

[0013] Ventilation and heat dissipation holes are provided on the side wall and the top of the detection box.

[0014] Foot pads are provided at the bottom of the detection box.

[0015] A sample gas pretreatment component is connected to the sample gas inlet.

[0016] The described sample gas pretreatment component includes a heat preservation box, in which a heating pipe and a temperature sensor are provided. At the front of the heat preservation box, there are an air outlet pipe, an air outlet switch, a heating switch, and a display. The display is connected to the temperature sensor. At the rear of the heat preservation box, there is a power plug and an air inlet pipe. At the bottom of the heat preservation box, there is a bracket.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0018] By setting a calibration component, the present utility model can perform pre - detection calibration on the detection equipment, ensure the accuracy of each detection result, avoid the deviation of the current detection result caused by the residual exhaust gas of the previous detection, and at the same time, a filtering module and a drying module are also set to filter out large particles and remove moisture, thereby ensuring the accuracy of the result. Description of the Drawings

[0019] Figure 1 is one of the structural schematic diagrams of Embodiment 1 of the present utility model,

[0020] Figure 2 is the second structural schematic diagram of Embodiment 1 of the present utility model,

[0021] Figure 3 is the third structural schematic diagram of Embodiment 1 of the present utility model,

[0022] Figure 4 is the structural schematic diagram of Embodiment 2 of the present utility model.

[0023] In the figure: 1, detection box; 2, standard gas outlet; 3, standard gas inlet; 4, standard gas flowmeter; 5, adjustment knob; 6, OBD communication interface; 7, adjustable three - way joint; 8, fan; 9, sample gas inlet; 10, sample gas outlet; 11, ventilation and heat dissipation holes; 12, handle; 13, foot pad; 14, display screen; 15, switch; 16, power supply port; 17, air inlet pipe; 18, power plug; 19, heat preservation box; 20, heating pipe; 21, air outlet pipe; 22, air outlet switch; 23, heating switch; 24, display; 25, bracket. Detailed Embodiments

[0024] Embodiment 1

[0025] Such as Figures 1 to 3As shown in the figure, the portable motor vehicle exhaust gas detection device of the present utility model includes a control system and a detection box 1. A display screen 14, a switch 15, and a power supply port 16 are provided at the front of the detection box 1. The display screen 14, the switch 15, and the power supply port 16 are all connected to the control system. An OBD communication interface 6, a sample gas inlet 9, a sample gas outlet 10, and an adjustable three-way valve 7 are provided at the rear of the detection box 1. The OBD communication interface 6 is connected to the control system. The detection box 1 is also provided with a detection and calibration component; the detection and calibration component includes a standard gas inlet 3, a standard gas outlet 2, a standard gas flowmeter 4 provided at the rear of the detection box 1, and a gas signal calibration module provided inside the detection box 1. The gas signal calibration module is connected to the control system. An adjustment knob 5 is provided on the standard gas flowmeter 4; an NDIR module, a temperature and humidity sensor, a gas sensor, a filtration module, and a sample gas drying module are provided inside the detection box 1. The NDIR module, the temperature and humidity sensor, the gas sensor, the filtration module, and the sample gas drying module are all connected to the control system. The gas sensor can adopt the Figaro TGS 823 model, the temperature and humidity sensor can adopt the SHT35 model, the filtration module can adopt a PTFE membrane filter, and the drying module can adopt a silica gel drying tube; a dust-proof cover is provided at the power supply port 16; a fan 8 is provided at the rear of the detection box 1; a handle 12 is provided at the top of the detection box 1; ventilation and heat dissipation holes 11 are provided on the side wall and the top of the detection box 1; foot pads 13 are provided at the bottom of the detection box 1.

[0026] Working process or working principle:

[0027] During use, first start the vehicle, preheat the engine to the normal operating temperature and turn off additional loads such as air conditioners and lights. At the same time, power the entire device through the power supply port 16, start the device through the switch 15 for preheating and calibration. Connect a standard gas cylinder to the standard gas outlet 2, and connect the standard gas outlet 2 to the recovery gas pipe. Use the air pump in the detection box 1 to pump the standard gas into the detection box 1, and calibrate it through the gas signal calibration module to ensure the detection accuracy of the control system. Then connect one end of the exhaust gas collection probe to the sample gas inlet 9 and place the other end of the probe in the vehicle exhaust pipe to collect the exhaust gas. Rotate the adjustable three-way valve 7 and use the air pump to pump the sample gas into the detection box 1, and successively pass through the filtration module, the drying module, and the temperature and humidity sensor to remove particulate matter and water vapor, and then pass through the NDIR module and the gas sensor to detect and analyze the sample gas, and display the detection result on the display screen 14 through the control system. After the detection is completed, discharge it through the sample gas exhaust port.

[0028] Embodiment 2

[0029] As Figure 4As shown, different from Embodiment 1, in this embodiment, the sample gas inlet 9 is connected with a sample gas pretreatment assembly; the sample gas pretreatment assembly includes a heat preservation box 19, in which a heating pipe 20 and a temperature sensor are arranged. At the front part of the heat preservation box 19, there are an air outlet pipe 21, an air outlet switch 22, a heating switch 23 and a display 24. The display 24 is connected with the temperature sensor. At the rear part of the heat preservation box 19, there is a power plug 18 and an air inlet pipe 17. At the bottom of the heat preservation box 19, there is a bracket 25.

[0030] When the outdoor temperature is relatively low, the temperature of the tail gas will drop rapidly. In order to keep the tail gas at a suitable detection temperature, the temperature of the tail gas is maintained or increased by the heating pipe in the heat preservation box 19, so as to ensure the detection accuracy of the tail gas. During use, the sample gas inlet 9 is connected with the air outlet pipe 21, and the tail gas enters the heat preservation box 19 from the air inlet pipe 17, so as to adjust the temperature of the tail gas and send the tail gas at a suitable temperature into the detection box.

[0031] By setting the calibration assembly, the detection equipment can be calibrated before detection, which can ensure the accuracy of each detection result, avoid the deviation of the current detection result caused by the residual tail gas of the previous detection. At the same time, a filtering module and a drying module are also set to filter out large particles and remove moisture, so as to ensure the accuracy of the result.

[0032] In the present utility model, the description of the direction and relative position relationship of the structure, such as the description of front, back, left, right, up and down, does not constitute a limitation to the present utility model, but is only for the convenience of description.

Claims

1. A portable motor vehicle exhaust detection device, characterized in that: The invention comprises a control system and a detection box (1). The front of the detection box (1) is provided with a display screen (14), a switch (15) and a power port (16). The display screen (14), the switch (15) and the power port (16) are all connected to the control system. The rear of the detection box (1) is provided with an OBD communication interface (6), a sample gas inlet (9), a sample gas outlet (10) and an adjustable three-way connection (7). The OBD communication interface (6) is connected to the control system. The detection box (1) is also provided with a detection calibration component. The detection calibration component comprises a standard gas inlet (3), a standard gas outlet (2), a standard gas flow meter (4) arranged at the rear of the detection box (1), and a gas signal calibration module arranged inside the detection box (1), the gas signal calibration module is connected to the control system, and the standard gas flow meter (4) is provided with an adjustment knob (5).

2. The portable vehicle exhaust gas detection device according to claim 1, characterized in that: The detection box (1) is provided with a handle (12) on the top.

3. The portable vehicle exhaust gas detection device according to claim 2, characterized in that: The side walls and the top of the detection box (1) are provided with ventilation and heat dissipation holes (11), a dust cover is provided at the power port (16), and a fan (8) is provided at the rear of the detection box (1).

4. The portable vehicle exhaust gas detection device according to claim 3, characterized in that: A foot pad (13) is provided at the bottom of the detection box (1).

5. The portable vehicle exhaust gas detection device according to claim 1, characterized in that: The sample gas inlet (9) is connected to a sample gas pretreatment component.

6. The portable vehicle exhaust gas detection device according to claim 5, characterized in that: The sample gas pretreatment component comprises an insulated box (19), a heating tube (20) and a temperature sensor are arranged in the insulated box (19), an air outlet pipe (21), an air outlet switch (22), a heating switch (23) and a display (24) are arranged at the front of the insulated box (19), the display (24) is connected to the temperature sensor, an electrical socket (18) and an air inlet pipe (17) are arranged at the rear of the insulated box (19), and a bracket (25) is arranged at the bottom of the insulated box (19).

Images