Automatic calibration device for remote sensing of motor vehicle exhaust

Abstract

The utility model relates to motor vehicle environmental protection performance inspection technical field discloses a kind of automatic calibration devices for motor vehicle exhaust remote sensing detection, including main part, the inside installation of main part has motor, the driving end fixedly connected with carousel of motor, the inside fixedly connected with five light reduction sheets of carousel, the rear end fixedly connected with detection cavity of light reduction sheet slidingly, the inside slidingly connected with vacuum valve of detection cavity, the inside fixedly connected with two transparent sheets of vacuum valve, the inside fixedly connected with pressure sensor probe of two transparent sheets, the inside fixedly connected with exhaust component of main part, the inside fixedly connected with presser assembly of main part, the outside slidingly connected with adjusting support assembly of main part.In the utility model, through motor drive light reduction sheet carousel rotation, the intelligent calibration of non-transparency is realized, built-in multistage light shield and full transparent sheet can satisfy different non-transparency detection needs.

Description

Technical Field

[0001] This utility model relates to the field of motor vehicle environmental performance testing technology, and in particular to an automatic calibration device for remote sensing detection of motor vehicle exhaust emissions. Background Technology

[0002] An automatic calibration device for remote sensing detection of motor vehicle exhaust gas is mainly used to calibrate the opacity and gas measurement accuracy of remote sensing components. The device adopts an automated design, and the rotation adjustment of the opacity calibration plate is achieved through screen control to ensure accurate calibration under different light transmission conditions. The gas calibration module is connected to a high-purity standard gas source to simulate exhaust gas environments of different concentrations. Combined with dynamic flow control technology, the calibration accuracy is improved. The device has an automatic environmental parameter compensation function to adapt to complex outdoor working conditions. The calibration process is completed with one click, and the data is recorded and uploaded in real time, meeting the calibration requirements of relevant standards for remote sensing detection equipment and ensuring the accuracy and reliability of the detection results.

[0003] The automatic calibration device for remote sensing detection of motor vehicle exhaust gas mainly consists of six sub-components: a high-sensitivity gas injection component consisting of a pressure regulating valve, an intelligent pressure gauge, and a gas mass flow controller; an exhaust component consisting of a vacuum pump, a pressure gauge, and an oxygen sensor; a quick-opening and plate-changing component consisting of a closed-loop motor, an electronic control unit, a vacuum valve, an electromagnetic seal, and an optical neutral density filter; a detection chamber consisting of a seamless stainless steel body with a black chemical coating; a benchmark alignment component consisting of a laser through-sensor switch; and an adjustment bracket constructed from a precision lead screw.

[0004] Traditional automatic calibration devices for remote sensing detection of motor vehicle exhaust gases use fixed light-shielding plates or manual adjustment methods, which cannot achieve automatic switching of multi-level light-shielding plates, resulting in limited calibration range and poor accuracy. Existing devices generally lack automated control components, requiring manual operation of the turntable and valves, which affects efficiency and easily introduces human error. In terms of sealing performance, most traditional devices are not equipped with electric cylinder clamping mechanisms and vacuum valve components, making them susceptible to interference from ambient gases during measurement and making it difficult to guarantee the accuracy of standard gas injection. Therefore, an automatic calibration device for remote sensing detection of motor vehicle exhaust gases is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an automatic calibration device for remote sensing detection of motor vehicle exhaust emissions. It aims to improve the problem that existing devices use fixed light-shielding plates or manual adjustment methods, which cannot achieve automatic switching of multi-level light-shielding plates, resulting in limited calibration range and poor accuracy.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An automatic calibration device for remote sensing detection of motor vehicle exhaust emissions includes a main body, an internal motor installed inside the main body, a turntable fixedly connected to the drive end of the motor, five light-reducing filters fixedly connected inside the turntable, a detection chamber fixedly and slidably connected to the rear end of each light-reducing filter, a vacuum valve slidably connected inside the detection chamber, two transparent sheets fixedly connected inside the vacuum valve, pressure sensor probes fixedly connected to the inner sides of the two transparent sheets, an exhaust assembly fixedly connected inside the main body, a clamping assembly fixedly connected inside the main body, and an adjusting bracket assembly slidably connected to the outer side of the main body.

[0008] As a further description of the above technical solution:

[0009] The adjusting bracket assembly includes a connecting bracket mounting plate. Two auxiliary rods are slidably connected inside the connecting bracket mounting plate. A fixing plate is fixedly connected to the outer side of each of the two auxiliary rods. A fixing screw is rotatably connected inside the fixing plate. A fixing rod is fixedly connected to the bottom end of the fixing plate. A slider is slidably connected to the outer side of the fixing rod. A locking pin is rotatably connected inside the slider. A rotating rod is fixedly connected to the outer side of the locking pin.

[0010] As a further description of the above technical solution:

[0011] The exhaust assembly includes a vacuum pump, the bottom of which is fixedly connected to the inside of the main body, a pressure valve is fixedly connected to the rear end of the vacuum pump, a main board is fixedly connected to the outside of the pressure valve, an air pipe is fixedly connected inside the main board, an oxygen sensor is fixedly connected to the other end of the air pipe, a second fixing plate is fixedly connected to the outside of the oxygen sensor, and a circuit board is fixedly connected to the top of the vacuum pump.

[0012] As a further description of the above technical solution:

[0013] The clamping assembly includes an electric cylinder, the outer side of which is fixedly connected to the inside of the main body. A fixed bushing is fixedly connected to the front end of the electric cylinder. A connecting rod is slidably connected inside the fixed bushing. A fixing screw is fixedly connected to the front end of the connecting rod. A pressure block is fixedly connected to the bottom end of the fixing screw.

[0014] As a further description of the above technical solution:

[0015] The slider is internally slidably connected to a support rod, the support rod is fixedly connected to a fixing block on the outside, and the bottom end of the fixing block is fixedly connected to a base.

[0016] As a further description of the above technical solution:

[0017] An antenna is fixedly connected to the top of the motherboard, the bottom of the antenna is fixedly connected to the top of the main body, a handle is fixedly connected to the top of the main body, and four support legs are fixedly connected to the bottom of the main body.

[0018] As a further description of the above technical solution:

[0019] The main body has seven solenoid valves fixedly connected inside, five of which have standard air ports fixedly connected inside, one of which has an exhaust port fixedly connected inside, and one of which has an interface fixedly connected inside.

[0020] As a further description of the above technical solution:

[0021] The rear end of the detection cavity is fixedly connected to a measurement channel, the outer side of the measurement channel is fixedly connected to the inside of the main body, the rear end of the main body is fixedly connected to a communication port, the rear end of the main body is fixedly connected to a device power supply port, the rear end of the main body is fixedly connected to a power switching switch, the rear end of the main body is fixedly connected to a charging port, and the inside of the main body is fixedly connected to a control socket.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, the light-reducing plate turntable is automatically rotated by a motor to achieve intelligent calibration of the light opacity. The built-in multi-level light-blocking plate and the fully transparent plate can meet the detection requirements of different light opacities. The vacuum valve and pressure sensor work together to form a vacuum environment in the sealed measurement channel for standard gas injection and pressure detection. Combined with the electric cylinder clamping mechanism, the airtightness of the measurement channel is ensured, which greatly improves the accuracy and reliability of exhaust gas detection.

[0024] 2. In this utility model, the height of the detection body is adjusted by a liftable support rod and a slider mechanism. Combined with the quick locking function of the rotating rod locking post, it can easily adapt to different detection environments. The unique combination design of the fixing plate and the connecting bracket mounting plate allows the detection body to be firmly fixed in any working position, effectively avoiding vibration interference during the detection process and ensuring the stability of the detection process and the accuracy of the data. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of an automatic calibration device for remote sensing detection of motor vehicle exhaust emissions proposed in this utility model.

[0026] Figure 2 This is a schematic diagram of the main body of an automatic calibration device for remote sensing detection of motor vehicle exhaust emissions proposed in this utility model.

[0027] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0028] Figure 4 This is a schematic diagram of the mainboard of an automatic calibration device for remote sensing detection of motor vehicle exhaust emissions proposed in this utility model.

[0029] Legend:

[0030] 1. Main body; 2. Connecting rod; 3. Fixing bushing; 4. Fixing screw; 5. Pressure block; 6. Handle; 7. Antenna; 8. Turntable; 9. Neutral density filter; 10. Connecting bracket mounting plate; 11. Support leg; 12. Base; 13. Fixing block; 14. Support rod; 15. Measurement channel; 16. Communication port; 17. Equipment power supply port; 18. Power switch; 19. Charging port; 20. Control socket; 21. Exhaust port; 22. Interface; 23. Standard gas port 24. Rotating rod; 25. Slider; 26. Locking post; 27. Fixing plate one; 28. Fixing screw; 29. ​​Auxiliary rod; 30. Main board; 31. Solenoid valve; 32. Vacuum pump; 33. Circuit board; 34. Pressure valve; 35. Detection chamber; 36. Oxygen sensor; 37. Fixing plate two; 38. Air pipe; 39. Electric cylinder; 40. Vacuum valve; 41. Transparent sheet; 42. Pressure sensor probe; 43. Motor; 44. Battery; 45. Fixing rod. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Reference Figure 1 , Figure 2 and Figure 4This utility model provides an embodiment of an automatic calibration device for remote sensing detection of motor vehicle exhaust gases, comprising a main body 1. The main body 1 serves as the core carrier of the entire device, providing a stable installation space for the internal components and ensuring the stability and safety of the device's operation. A motor 43 is installed inside the main body 1, and a turntable 8 is fixedly connected to the drive end of the motor 43. The motor 43 serves as a power source, which can precisely control the rotation of the turntable 8, providing stable and reliable power support for the automatic calibration of opacity measurement. Seven solenoid valves 31 are fixedly connected inside the main body 1. Five of the solenoid valves 31 are fixedly connected to a standard gas port 23, which is used to connect to a standard gas. Through the precise control of the solenoid valves 31, the standard gas can be quantitatively injected, providing a standard reference for the calibration of gas measurement accuracy. One of the solenoid valves 31 is fixedly connected to an exhaust port 21, which can quickly discharge the residual gas in the cavity after the detection is completed, ensuring the consistency of the detection environment each time. One of the solenoid valves 31 is fixedly connected to an interface 22, which can be flexibly connected to external equipment to realize the flow of gas between the device and the outside.

[0033] Five light-reducing filters 9 are fixedly connected inside the turntable 8. Driven by the motor 43, the turntable 8 can rotate at a precise angle, ensuring that the light-reducing filters 9 can accurately switch to the detection position. The rear end of the light-reducing filters 9 is fixedly and slidably connected to the detection chamber 35. The five light-reducing filters 9 have opacity values ​​of 10%, 20%, 30%, 40%, and 50%, respectively. Inside the turntable 8, there is also a completely transparent filter and a hollow hole. By rotating the turntable 8, different light transmission conditions can be simulated to meet various calibration requirements for the detection of the opacity of motor vehicle exhaust. The exhaust gas is accurately tested inside the detection chamber 35. The internal sliding connection of the detection chamber 35... A vacuum valve 40 is connected, which can slide in and out flexibly during the detection process to cooperate with different stages of the detection process, ensuring the sealing of the detection environment and the accuracy of gas measurement. Two transparent plates 41 are fixedly connected inside the vacuum valve 40, and pressure sensor probes 42 are fixedly connected to the inner side of the two transparent plates 41. The two transparent plates 41 form an observation window for gas detection, ensuring that light can pass through smoothly for measurement, while providing a stable installation environment for the pressure sensor probes 42. The pressure sensor probes 42 collect pressure data in the detection chamber 35 in real time, providing key pressure parameters for gas measurement accuracy calibration and ensuring the reliability of measurement results.

[0034] A measurement channel 15 is fixedly connected to the rear end of the detection chamber 35. The measurement channel 15 has a circular hole structure and an internal static calibration shut-off valve structure. As a critical path for exhaust gas detection, the circular hole structure of the measurement channel 15 ensures smooth flow of light and gas. The shut-off valve structure can close when the turntable 8 is rotated to the fully transparent lens to prevent gas leakage. In conjunction with the vacuum valve 40, odor detection and standard gas injection are achieved. The outer side of the measurement channel 15 is fixedly connected to the inside of the main body 1 to ensure its stable installation and guarantee the smooth progress of the detection process.

[0035] An exhaust assembly is fixedly connected inside the main body 1. The exhaust assembly is used to maintain the cleanliness and stability of the detection environment and avoid residual gas from interfering with the detection results. The exhaust assembly includes a vacuum pump 32. The bottom end of the vacuum pump 32 is fixedly connected inside the main body 1. The vacuum pump 32 can quickly extract the gas in the detection chamber 35 to form a vacuum environment, which facilitates the accurate injection and detection of the standard gas. A pressure valve 34 is fixedly connected to the rear end of the vacuum pump 32. The pressure valve 34 can accurately adjust the pressure in the detection chamber 35 according to the detection requirements to ensure that the detection process is carried out under appropriate pressure conditions. A main board 30 is fixedly connected to the outside of the pressure valve 34. The main board 30 is the control core of the device and integrates various circuit components to achieve coordinated control of the various components of the device. A gas pipe 38 is fixedly connected inside the main board 30. The gas pipe 38 is responsible for the transmission of gas and accurately delivers the standard gas, exhaust gas, etc. to the corresponding detection position.

[0036] An antenna 7 is fixedly connected to the top of the mainboard 30, and the bottom of the antenna 7 is fixedly connected to the top of the main body 1. The antenna 7 is used to realize wireless communication between the device and external devices, facilitating data transmission and remote control. A handle 6 is fixedly connected to the top of the main body 1, which facilitates the handling and movement of the device by the staff, improving the ease of use. Four support legs 11 are fixedly connected to the bottom of the main body 1, providing stable support for the device and ensuring its stability during the testing process, preventing shaking from affecting the testing accuracy. A battery 44 is fixedly connected inside the main body 1. To ensure the operation of the entire device and facilitate portable operation, an oxygen sensor 36 is fixedly connected to the other end of the air pipe 38. The oxygen sensor 36 is used to detect the oxygen content in the gas, providing key data for the analysis of motor vehicle exhaust components. A fixing plate 37 is fixedly connected to the outside of the oxygen sensor 36, providing a stable mounting support for the oxygen sensor 36 and ensuring the stability and accuracy of its detection. A circuit board 33 is fixedly connected to the top of the vacuum pump 32. The circuit board 33, together with the main board 30, realizes precise control of components such as the vacuum pump 32, ensuring the efficient operation of the exhaust assembly.

[0037] The clamping assembly includes an electric cylinder 39, which is fixedly connected to the inside of the main body 1. The electric cylinder 39 can precisely control the clamping force, providing a reliable guarantee for the sealing of the measurement channel 15. A fixed bushing 3 is fixedly connected to the front end of the electric cylinder 39. A connecting rod 2 is slidably connected inside the fixed bushing 3. The fixed bushing 3 provides a stable sliding guide for the connecting rod 2, ensuring the accuracy of the clamping action. A fixing screw 4 is fixedly connected to the front end of the connecting rod 2. A pressure block 5 is fixedly connected to the bottom end of the fixing screw 4. Driven by the electric cylinder 39, the connecting rod 2 drives the pressure block 5 to move back and forth, completing the clamping operation of the neutral density filter 9. The fixing screw 4 is used to adjust the installation position of the pressure block 5 to adapt to different specifications of neutral density filters 9. Under the action of the electric cylinder 39, the pressure block 5 tightly presses the neutral density filter 9 onto the measurement channel 15, effectively preventing gas leakage, ensuring the sealing of the measurement channel 15, and improving the accuracy of the test results.

[0038] The rear end of the main body 1 is fixedly connected to a communication port 16, which is used to realize wired data transmission between the device and external devices, facilitating the export of detection data and the upgrading of the device's program. The rear end of the main body 1 is fixedly connected to a device power supply port 17, which provides a stable power input to the device and ensures the normal operation of each component of the device. The rear end of the main body 1 is fixedly connected to a power switching switch 18, which can flexibly switch the power supply mode of the device to meet the needs of different usage scenarios. The rear end of the main body 1 is fixedly connected to a charging port 19, which facilitates the charging of the device's built-in battery 44, improving the device's battery life and usage flexibility. The main body 1 is internally fixedly connected to a control socket 20, which can be connected to external control devices to realize diversified control of the device and meet the operational needs of different users.

[0039] Reference Figure 2 , Figure 3 The adjustable bracket assembly includes a connecting bracket mounting plate 10, which is used to connect to an external bracket and provide an installation foundation for the device. Its structural design facilitates cooperation with the adjustable bracket assembly, enabling flexible adjustment of the device's height and angle. The connecting bracket mounting plate 10 has two auxiliary rods slidably connected inside, and a fixing plate 27 is fixedly connected to the outer side of each of the two auxiliary rods 29. A fixing screw 28 is rotatably connected inside the fixing plate 27. By rotating the fixing screw 28, the distance between the fixing plate 27 and the connecting bracket mounting plate 10 can be adjusted, enabling the device to be fastened and disassembled, making the operation simple and quick.

[0040] A fixing rod 45 is fixedly connected to the bottom end of the fixing plate 27. A slider 25 is slidably connected to the outside of the fixing rod 45 to fix the fixing plate inside the slider 25 at any time. A support rod 14 is slidably connected inside the slider 25. The support rod 14 cooperates with the slider 25 to provide reliable vertical support for the entire device after the height is adjusted, ensuring that the device will not shake during testing. The support rod 14 is slidably connected inside the slider 25, and the slider 25 can slide up and down along the support rod 14 to realize arbitrary adjustment of the device height to meet the height requirements of different testing scenarios. A locking post 26 is rotatably connected inside the slider 25. A rotating rod 24 is fixedly connected to the outside of the locking post 26. The locking post 26 can fix the slider 25 under the drive of the rotating rod 24 to ensure that the device remains stable after being adjusted to a suitable height and prevent shaking.

[0041] The rotating rod 24 provides the user with an operating point. By rotating the rotating rod 24, the fixing and loosening of the locking pin 26 on the slider 25 can be easily controlled, making the operation convenient and labor-saving. The support rod 14, as the main support component for adjusting the height of the device, works with the slider 25 to achieve stable fixing of the device at different heights. A fixing block 13 is fixedly connected to the outside of the support rod 14, and a base 12 is fixedly connected to the bottom of the fixing block 13. The fixing block 13 is used to securely install the support rod 14 on the base 12, ensuring the structural stability of the entire adjustment bracket assembly. The base 12 provides a stable support foundation for the device, and its structural design ensures that the device can maintain balance under various ground conditions, ensuring the smooth progress of the testing work.

[0042] Working principle: An automatic calibration device for remote sensing detection of motor vehicle exhaust gases is used to calibrate the remote sensing detection components. Calibration items include opacity and gas measurement accuracy. Opacity measurement can be automatically rotated via screen control. The device automatically controls the rotation of the turntable 8 by activating motor 43. Inside the turntable 8 are installed five light-blocking sheets with opacity values ​​of 10%, 20%, 30%, 40%, and 50%, as well as one completely transparent sheet and a perforated hole. Motor vehicle exhaust gases are tested inside the detection chamber 35 by passing through one of the multiple light-blocking sheets 9. The detection chamber 35 is used for vertical movement. The measuring channel 15 is a circular hole structure with a static calibration shut-off valve structure inside. When the turntable 8 is rotated to the fully transparent lens, the odor gas is released. The vacuum valve 40 slides into the measuring channel 35. Finally, due to the operation of the internal equipment of the main body 1, a vacuum environment is formed inside the measuring channel 35 for the injection of standard gas. At this time, the measurement is realized through the transparent sheet 41 inside the vacuum valve 40, and the internal pressure is collected by the pressure sensor probe 42. During the measurement, the electric cylinder 39 is used to press the connecting rod 2 to press the pressure block 5 into the light-reducing sheet 9 to seal the measuring channel 15.

[0043] When the main body 1 performs remote sensing detection of motor vehicle exhaust, in order to fix the main body 1 and adapt to the usage environment by raising and lowering it, connecting bracket mounting plates 10 are provided at both ends of the outer side of the main body 1 to connect to the external bracket. The bracket uses two support rods 14 fixed on the base 12 by fixing blocks 13 to achieve arbitrary height raising and lowering. When the user slides the slider 25 to the required height, the rotating rod 24 drives the locking pin 26 to fix the slider 25 on the support rod 14. In addition, a fixing rod 45 slides inside the slider 25. The fixing plate 27 is fixed inside the slider 25 by the fixing rod 45. The fixing screw 28 at the rear end of the fixing plate 27 rotates to drive the fixing plate 27 and the three rods at one end of the auxiliary rod 29 to correspond to and fix the main body 1 from both ends.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An automatic calibration device for remote sensing detection of motor vehicle exhaust emissions, comprising a main body (1), characterized in that: The main body (1) is equipped with a motor (43) inside. The drive end of the motor (43) is fixedly connected to a turntable (8). Five light-reducing plates (9) are fixedly connected inside the turntable (8). A detection chamber (35) is fixedly and slidably connected to the rear end of the light-reducing plates (9). A vacuum valve (40) is slidably connected inside the detection chamber (35). Two transparent plates (41) are fixedly connected inside the vacuum valve (40). A pressure sensor probe (42) is fixedly connected to the inner side of the two transparent plates (41). An exhaust assembly is fixedly connected inside the main body (1). A clamping assembly is fixedly connected inside the main body (1). An adjustment bracket assembly is slidably connected to the outer side of the main body (1).

2. The automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 1, characterized in that: The adjusting bracket assembly includes a connecting bracket mounting plate (10). Two auxiliary rods (29) are slidably connected inside the connecting bracket mounting plate (10). A fixing plate (27) is fixedly connected to the outer side of each of the two auxiliary rods (29). A fixing screw (28) is rotatably connected inside the fixing plate (27). A fixing rod (45) is fixedly connected to the bottom end of the fixing plate (27). A slider (25) is slidably connected to the outer side of the fixing rod (45). A locking pin (26) is rotatably connected inside the slider (25). A rotating rod (24) is fixedly connected to the outer side of the locking pin (26).

3. The automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 1, characterized in that: The exhaust assembly includes a vacuum pump (32), the bottom end of which is fixedly connected to the inside of the main body (1). A pressure valve (34) is fixedly connected to the rear end of the vacuum pump (32). A main board (30) is fixedly connected to the outside of the pressure valve (34). An air pipe (38) is fixedly connected inside the main board (30). An oxygen sensor (36) is fixedly connected to the other end of the air pipe (38). A fixing plate (37) is fixedly connected to the outside of the oxygen sensor (36). A circuit board (33) is fixedly connected to the top of the vacuum pump (32).

4. The automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 1, characterized in that: The clamping assembly includes an electric cylinder (39), the outer side of which is fixedly connected to the inside of the main body (1). A fixed bushing (3) is fixedly connected to the front end of the electric cylinder (39). A connecting rod (2) is slidably connected inside the fixed bushing (3). A fixing screw (4) is fixedly connected to the front end of the connecting rod (2). A pressure block (5) is fixedly connected to the bottom end of the fixing screw (4).

5. An automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 2, characterized in that: The slider (25) is slidably connected to a support rod (14), and a fixing block (13) is fixedly connected to the outside of the support rod (14). A base (12) is fixedly connected to the bottom end of the fixing block (13).

6. The automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 3, characterized in that: An antenna (7) is fixedly connected to the top of the motherboard (30), and the bottom of the antenna (7) is fixedly connected to the top of the main body (1). A handle (6) is fixedly connected to the top of the main body (1), and four legs (11) are fixedly connected to the bottom of the main body (1). A battery (44) is fixedly connected inside the main body (1).

7. The automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 1, characterized in that: The main body (1) has seven solenoid valves (31) fixedly connected inside, five of which have a standard air port (23) fixedly connected inside, one of which has an exhaust port (21) fixedly connected inside, and one of which has an interface (22) fixedly connected inside.

8. The automatic calibration device for remote sensing detection of motor vehicle exhaust emissions according to claim 1, characterized in that: The detection cavity (35) is fixedly connected to a measurement channel (15) at its rear end. The outer side of the measurement channel (15) is fixedly connected to the inside of the main body (1). The rear end of the main body (1) is fixedly connected to a communication port (16). The rear end of the main body (1) is fixedly connected to a device power supply port (17). The rear end of the main body (1) is fixedly connected to a power switching switch (18). The rear end of the main body (1) is fixedly connected to a charging port (19). The inside of the main body (1) is fixedly connected to a control socket (20).

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