A motor vehicle exhaust detection platform

Abstract

The present invention provides a motor vehicle exhaust detection platform, which belongs to the field of motor vehicle detection technology, and is used to solve the technical problems of low applicability, low safety and poor detection effect of existing motor vehicle exhaust detection platforms. The present invention includes a supporting base and a rotating platform, a master control computer is connected to the OBD interface of the car, the rotating platform is rotatably connected to the supporting base, a lifting mechanism is arranged at the lower part of the rotating platform, a first crawler and a second crawler are arranged on the rotating platform, a driving mechanism is arranged at the lower part of the first crawler and the second crawler, the front and rear wheels of the car are respectively located on the first crawler and the second crawler, and the head and tail of the car are connected to the protective device. The present invention has no restriction on the height of the chassis of the car, and there is no damage to the tires, wheels and engines during detection. Both two-wheel drive and four-wheel drive vehicles can be used, and it has strong applicability, good safety, and high accuracy in exhaust gas detection, which can effectively prevent vehicles illegally modified for CNG from evading detection.

Description

Technical Field

[0001] The invention belongs to the technical field of motor vehicle detection, and in particular is a motor vehicle exhaust detection platform. Background Art

[0002] With the rapid development of China's economy, the number of cars has increased dramatically. Especially in recent years, there are more and more private cars. The rapid development of China's automobile industry will inevitably drive a series of automobile design, development, production, sales, and after-market industries. At the same time, the problem of pollution has also arisen. The exhaust pollution generated by crowded cars on the road affects people's lives. The exhaust pollution of motor vehicles in some big cities is becoming more and more worrying. People look forward to being able to enjoy the comfortable and convenient life brought by economic development more freely without being troubled by air pollution. Therefore, it is a major issue to study new technologies to reduce the emission of automobile exhaust pollutants. At the same time, my country is constantly increasing its efforts to monitor automobile exhaust emissions to achieve a good living environment.

[0003] When the car engine is running normally, the automobile exhaust detection equipment detects and analyzes the exhaust gas emitted by the car, so as to determine whether the car engine is working normally and whether the harmful gases emitted exceed the standard. It is an effective tool for controlling automobile exhaust emission pollution.

[0004] According to the driving mode, cars are divided into front-wheel drive cars, rear-wheel drive cars and four-wheel drive cars. The existing exhaust gas detection is to detect the exhaust gas of motor vehicles by using a horizontally set roller-type detection platform. The wheel is placed between the two rollers, and the car driving wheel rotates relative to the roller to simulate the normal driving of the car and detect the exhaust gas discharged by the car. Front-wheel drive or rear-wheel drive cars can choose the nearest exhaust gas detection center for detection. Due to the low penetration rate of four-wheel drive detection equipment, the exhaust gas detection of four-wheel drive cars needs to be carried out at a fixed detection center with special equipment. For sports cars with low chassis, when the wheel (front-wheel drive or rear-wheel drive) docks with the tire groove, the chassis has already touched the ground, which will cause certain damage to the car body. The existing automobile exhaust gas detection equipment can only simulate the driving of the car on a flat road (the body remains horizontal) for exhaust gas detection. The exhaust gas emissions of the car when climbing a slope are different from those on a flat road, and the detection data have certain differences.

[0005] During the exhaust gas test, there may be cases where the inspector's improper operation causes damage to the vehicle. Some new cars have not been run-in, and the inspector uses low gear, high throttle (slams on the accelerator) and high speed, causing the engine to explode; the drum resistance is too large, and the inspector slams on the accelerator, causing abnormal events on the transmission computer board; some large-displacement vehicles have too much horsepower, causing the drive wheel to jump or the drive wheel to bounce twice, causing tire damage or wheel hub breakage; there is also a problem that every car owner is concerned about. After the exhaust gas test, the vehicle detects abnormal driving or abnormal operation of various units of the vehicle, and the fault lights on the dashboard are all on; after the exhaust gas test, you will feel that the car's traction has decreased and fuel consumption has increased. This leads to conflicts between car owners and the testing center. In most cases, car owners need to pay for repairs due to improper testing.

[0006] Some car owners who illegally modified CNG vehicles removed the illegally modified CNG cylinders before the vehicle exhaust test, added some alcohol to the fuel tank, and used the chemical principle that alcohol combustion produces water to dissolve some toxic and harmful gases that pollute the air, thereby evading the state's exhaust gas test for motor vehicles. Since the exhaust gas test platform is basically placed horizontally, the engine is also in a horizontal position. The small amount of water produced by the combustion of alcohol can be discharged normally outside the vehicle using the exhaust gas pressure discharged from the exhaust pipe, which will not have much impact on engine parts such as spark plugs, thereby evading the normal test of the motor vehicle inspection center. When the test is passed, continue to install the illegally modified CNG cylinders for normal use. However, since some parameters of the engine such as the engine camshaft and cylinder combustion mode of gasoline vehicles are designed and developed based on gasoline as fuel before leaving the factory, when illegally modifying CNG as fuel, unreasonable modification will cause incomplete combustion, ignition advance, ignition delay and other reasons, resulting in the exhaust gas discharged not meeting the current national emission requirements for motor vehicle exhaust gas standard parameters, posing certain safety hazards and polluting the environment. Summary of the invention

[0007] The purpose of the present invention is to address the above-mentioned problems existing in the prior art and to propose a motor vehicle exhaust gas detection platform to achieve efficient, accurate and safe exhaust gas detection of motor vehicles.

[0008] The purpose of the present invention can be achieved by the following technical solutions:

[0009] A motor vehicle exhaust gas detection platform comprises a supporting base, a rotating platform, an exhaust gas monitoring device, a controller, a master control computer and a car, an OBD interface is arranged in the car, the OBD interface is electrically connected to the master control computer, a foundation pit is opened on the ground of the exhaust gas detection center, the supporting base and the rotating platform are located in the foundation pit, one end of the rotating platform is rotatably connected to the supporting base, and when the rotating platform is in a horizontal state, its upper surface is flush with the ground; a lifting mechanism is arranged at the lower part of the rotating platform, and the lifting mechanism is located between the supporting base and the rotating platform; a first crawler track and a second crawler track are arranged on the rotating platform, and a driving mechanism is arranged at the lower part of the first crawler track and the second crawler track, and the front and rear wheels of the car are respectively located on the first crawler track and the second crawler track; a detector of the exhaust gas monitoring device is connected to the exhaust pipe of the car, and the exhaust gas monitoring device and the controller are electrically connected to the master control computer; a protective device is arranged on the rotating platform, and the head and tail of the car are connected to the protective device.

[0010] The working principle of the present invention is: when performing exhaust gas detection, the car drives onto a rotating platform, the front and rear wheels of the car are respectively located on the first track and the second track, and the head and tail of the car are connected to the protective device; the master control computer is connected to the OBD interface of the car, the master control computer reads the real-time vehicle speed and engine information of the car, and the rotation speed of the first track and the second track is intelligently adjusted by the controller to achieve synchronization of the vehicle speed with the speed of the track, so as to perform exhaust gas detection, prevent the engine damage accident caused by stepping on the accelerator suddenly, and there is no excessive tire jumping to damage the tire or wheel hub; when testing a two-wheel drive vehicle, only one track needs to be started, and when a four-wheel drive vehicle performs exhaust gas detection, the two tracks are controlled to adjust the speed for detection; the rotation angle of the rotating platform is adjusted by controlling the lifting mechanism, and the exhaust gas emitted is detected by simulating ramp driving, thereby improving the accuracy and detection intensity of the detection results and increasing the control efforts.

[0011] The rotating platform includes a cover plate and a platform frame. The cover plate is detachably connected to the upper part of the platform frame. Two track mounting grooves are provided on the cover plate. The upper surface of the cover plate is flush with the upper surfaces of the first track and the second track. The vehicle wheels are located on the tracks. The vehicle chassis is always kept parallel to the rotating platform, and there is no limit on the chassis height.

[0012] The support base includes a support frame and a support cross bar. The two sides of the support frame are connected by a number of support cross bars. The number of the support cross bars is three. A rotating shaft support seat is arranged at one end of the support frame. A rotating shaft is arranged on the rotating shaft support seat. The platform frame and the rotating shaft support seat are rotatably connected through the rotating shaft. Both the platform frame and the bottom support seat are made of a steel structure frame. The steel structure has high strength, is convenient to transport, and is simple to assemble.

[0013] The driving mechanism includes a driving roller and a plurality of supporting rollers, both ends of the driving roller and the supporting roller are connected to the platform frame through bearings, and the driving roller is located in front of the supporting roller; a first motor is arranged on the right side of the first track, and a second motor is arranged on the right side of the second track, the first motor and the second motor are respectively fixed on the first motor bracket and the second motor bracket, the first motor bracket and the second motor bracket are both welded to the right side of the platform frame, and the first motor cover and the second motor cover are respectively arranged on the outside of the first motor and the second motor; the output shafts of the first motor and the second motor are connected to one end of the driving roller through a coupling, and the first motor and the second motor are both electrically connected to the controller.

[0014] With the above structure, the first motor drives the driving roller to rotate, and the driving roller drives the first crawler to make a rotational motion. The second motor drives the driving roller to rotate, and the driving roller drives the second crawler to make a rotational motion. The supporting roller has a supporting effect on the first crawler and the second crawler, thereby enhancing the load-bearing capacity of the detection platform. The first motor is the same as the second motor, and the structure of the first crawler and the second crawler is the same. When performing exhaust gas detection on a four-wheel drive motor vehicle, the rotation speed of the first crawler and the second crawler can be kept the same, and the speed of the front and rear wheels of the vehicle and the crawler can be kept the same.

[0015] A transmission tooth is arranged on the surface of the driving roller, and the transmission tooth is located in the middle of the driving roller. Transmission grooves matching with the transmission tooth are opened on the inner sides of the first track and the second track. Two positioning rings are arranged on the surface of the supporting roller, and the two positioning rings are symmetrically arranged at both ends of the supporting roller. Positioning grooves matching with the positioning rings are opened on the inner sides of the first track and the second track.

[0016] With the above structure, the driving roller is connected with the crawler belt through the transmission gear, which increases the transmission performance. The positioning ring is provided to facilitate the assembly of the crawler belt and prevent the crawler belt from deviating left and right when rotating.

[0017] The lifting mechanism includes a triangle plate, a telescopic connecting rod, a hydraulic cylinder and an articulated seat. The articulated seat is welded to the supporting cross bar. The telescopic end of the telescopic connecting rod and the fixed end of the hydraulic cylinder are both articulated to the articulated seat. The fixed end of the telescopic connecting rod is articulated to the left bottom angle position of the triangle plate, the telescopic end of the hydraulic cylinder is articulated to the top angle position of the triangle plate, the right bottom angle position of the triangle plate is articulated to the platform frame, and the hydraulic cylinder is electrically connected to the controller.

[0018] When the rotating platform needs to be lifted, the output end of the hydraulic cylinder is controlled to extend, driving one end of the rotating platform to lift upward, and the other end of the rotating platform is connected to the supporting base through a rotating shaft, so that the rotating platform forms a certain angle with the ground. Under the same speed conditions, the car requires greater traction when the body is horizontal, thereby simulating the detection of exhaust gas of motor vehicles when driving on a slope. The angle of the rotating platform can be set by controlling the stroke of the hydraulic cylinder, which can more effectively simulate the normal driving of the motor vehicle and improve the accuracy of exhaust gas detection.

[0019] The angle between the rotating platform and the ground during exhaust gas detection is set to 30-45°, which can effectively detect the exhaust gas discharged by motor vehicles, and can also effectively prevent vehicles that are illegally modified into CNG from passing the exhaust gas detection.

[0020] The protection device comprises a protection pile and a fixing ring, both of which are welded to the upper part of the safety rotating platform of the car, the head of the car is connected to the protection pile through a first safety rope, and the tail of the car is connected through a second safety rope fixing ring.

[0021] By adopting the above structure, the front and rear positions of the car are fixed during the detection process, so that the car wheels always remain on the tracks to prevent the car from rushing out of the detection platform. When conducting slope simulation detection, the car can be prevented from sliding down the slope, thereby enhancing the safety protection performance of the monitoring platform.

[0022] The protective pile is provided with a powerful fan, which is electrically connected to the controller. Starting the powerful fan can simulate the wind resistance of the car when it is driving, increase the accuracy of the detection data, and can also cool the car engine to protect the engine.

[0023] The controller includes a first track control module, a second track control module, a rotating platform angle control module and a force component adjustment module; the first track control module and the second track control module are respectively used to control the first motor and the second motor so that the operating speeds of the first track and the second track are consistent with the wheel speed; the rotating platform angle control module is used to control the hydraulic cylinder to adjust the rotating angle of the rotating platform; the wind force adjustment module is used to control the rotation speed of the powerful fan and adjust the wind force according to different vehicle speeds.

[0024] Compared with the existing technology, this motor vehicle exhaust detection platform has the following advantages:

[0025] 1. The present invention provides a motor vehicle exhaust detection platform. The front and rear wheels of the vehicle are respectively located on a first track and a second track. During the detection process, the vehicle always remains parallel to the rotating platform, and there is no limit on the chassis height; the OBD interface is connected to the master control computer, and the computer reads the vehicle speed and intelligently adjusts the rotation speed of the first track and the second track through the controller to achieve synchronization of the vehicle speed and the speed of the track. There is no excessive tire jumping to damage the tire or wheel hub, and there is not much difference between the exhaust detection process and normal driving. There is no fault light that is fully lit, and there will be no problems such as engine cylinder explosion, computer board burning or abnormality. It can effectively avoid the operator's improper operation to damage the motor vehicle, and scientifically and conveniently perform exhaust detection.

[0026] 2. The first crawler track and the second crawler track control the rotation speed through the first motor and the second motor respectively. The exhaust gas detection can be performed on front-wheel drive vehicles, rear-wheel drive vehicles or four-wheel drive vehicles, which has strong applicability.

[0027] 3. The angle of the rotating platform can be adjusted by controlling the lifting mechanism, thereby simulating the detection of exhaust gas of motor vehicles when driving on a slope, thereby improving the accuracy of exhaust gas detection.

[0028] 4. By adjusting the rotation angle of the rotating platform, the tilt angle of the motor vehicle engine is controlled. For vehicles that have been illegally modified to run on CNG, when the owners of the vehicles illegally modified to run on CNG use alcohol or other liquids as auxiliary fuels to evade detection, the tilt of the engine will cause the water produced after combustion to enter other units of the engine, causing engine failure, making it impossible to evade detection. This effectively prevents vehicles that have been illegally modified to run on CNG from passing exhaust gas detection, reduces the accident rate of illegally modified vehicles, improves road driving safety, helps reduce air pollution, and increases the control of automobile exhaust gas detection.

[0029] 5. During the inspection process, the head and tail of the motor vehicle are connected to the protective device, which can prevent the car from sliding down the slope during the slope simulation inspection, effectively prevent accidents during the inspection, and increase the safety of the inspection platform.

[0030] 6. The speed of the powerful fan can be adjusted, which can simulate the wind resistance when the car is driving, increase the accuracy of the test data, and at the same time cool the car engine to protect the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural diagram of an existing automobile exhaust detection platform;

[0032] Figure 2 It is a structural schematic diagram of the automobile of the present invention when it is in a lifted state;

[0033] Figure 3 It is a structural schematic diagram of the automobile of the present invention when it is in a horizontal state;

[0034] Figure 4 It is a structural schematic diagram of the support base in the present invention;

[0035] Figure 5 It is a schematic diagram of the top view of the rotating platform in the present invention;

[0036] Figure 6 It is a schematic diagram of the internal structure of the rotating platform in the present invention;

[0037] Figure 7 It is a schematic diagram of the control connection structure of the present invention;

[0038] Figure 8 It is a schematic diagram of the composition structure of the controller in the present invention;

[0039] In the figure: 1-exhaust detection device, 2-car, 3-foundation pit, 4-support base, 401-support frame, 402-support cross bar, 5-rotating platform, 501-cover plate, 502-platform frame, 6-first crawler, 7-second crawler, 8-master control computer, 9-lifting mechanism, 901-triangular plate, 902-telescopic connecting rod, 903-hydraulic cylinder, 904-articulated seat, 10-protective pile, 11-powerful fan, 12-first safety rope, 13-second safety rope, 14-driving roller, 1401-transmission gear, 15-support roller, 1501-positioning ring, 16-rotating shaft, 17-rotating shaft support seat, 18-first motor cover, 19-second motor cover, 20-first motor, 21-first motor bracket, 22-second motor, 23-second motor bracket, 24-controller, 25-fixed ring. DETAILED DESCRIPTION

[0040] The technical solution of this patent is further described in detail below in conjunction with specific implementation methods.

[0041] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0042] In the description of this patent, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0043] In the description of this patent, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, it can be fixedly connected or set, or it can be detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in this patent can be understood according to specific circumstances.

[0044] See also Figure 1 , Figure 1 The vehicle is equipped with an existing motor vehicle detection platform. The wheels are placed between two rollers. The vehicle drives the wheels to rotate relative to the rollers to simulate the normal driving of the vehicle. The exhaust gas detection device 1 detects the exhaust gas discharged by the vehicle 2.

[0045] See also Figure 2-8 The present embodiment provides a motor vehicle exhaust gas detection platform, including a support base 4, a rotating platform 5, an exhaust gas monitoring device 1, a controller 24, a master control computer 8 and a car 2, an OBD interface 201 is arranged in the car 2 (the cars currently on the market are all equipped with OBD, OBD is an on-board automatic diagnostic system, which can detect the working conditions of the engine electronic control system and other functional modules of the vehicle during the operation of the car. By interconnecting the car's OBD interface with a computer, the car data can be viewed in real time, the car fault can be detected, and convenience is provided for car repair, development of car-related functions, and modification of car equipment). The OBD interface 201 is electrically connected to the master control computer 8, a foundation pit 3 is opened on the ground of the exhaust gas detection center, and the support base 4 and the rotating platform 5 are located in the foundation pit 3. One end of the rotating platform 5 is rotatably connected to the supporting base 4, and the upper surface of the rotating platform 5 is flush with the ground when the rotating platform 5 is in a horizontal state; a lifting mechanism 9 is arranged at the lower part of the rotating platform 5, and the lifting mechanism 9 is located between the supporting base 4 and the rotating platform 5; a first crawler 6 and a second crawler 7 are arranged on the rotating platform 5, and a driving mechanism is arranged at the lower part of the first crawler 6 and the second crawler 7, and the front and rear wheels of the car 2 are respectively located on the first crawler 6 and the second crawler 7; the detector of the exhaust gas monitoring device 1 is connected to the exhaust pipe of the car 2, and the exhaust gas monitoring device 1 and the controller 24 are electrically connected to the main control computer 8; a protective device is arranged on the rotating platform 5, and the head and tail of the car 2 are connected to the protective device to prevent accidents during detection and increase the safety of the detection platform.

[0046] When performing exhaust gas detection, the car 2 drives onto the rotating platform 5, the front and rear wheels of the car 2 are respectively located on the first track 6 and the second track 7, and the head and tail of the car 2 are connected to the protective device; the master control computer 8 is connected to the OBD interface of the car 2, and the master control computer 8 reads the real-time vehicle speed and engine information of the car, and intelligently adjusts the rotation speed of the first track 6 and the second track 7 through the controller 24 to achieve synchronization of the vehicle speed and the speed of the track, so as to perform exhaust gas detection; when testing a two-wheel drive vehicle, only one track needs to be started, and when a four-wheel drive vehicle performs exhaust gas detection, the two tracks are controlled to adjust the speed for detection; the rotation angle of the rotating platform 5 is adjusted by controlling the lifting mechanism 9, and the exhaust gas emitted by simulating ramp driving is detected, thereby improving the accuracy and detection intensity of the detection results and increasing the control efforts.

[0047] The rotating platform 5 includes a cover plate 501 and a platform frame 502. The cover plate 501 is detachably connected to the upper part of the platform frame 502. Two track mounting grooves are provided on the cover plate 501. The upper surface of the cover plate 501 is flush with the upper surfaces of the first track 6 and the second track 7. The wheels of the car 2 are located on the tracks. The chassis of the car is always kept parallel to the rotating platform 5, and there is no limit on the height of the chassis.

[0048] The support base 4 includes a support frame 401 and a support cross bar 402. The two sides of the support frame 401 are connected by a plurality of support cross bars 402. In this embodiment, the number of support cross bars 402 is preferably three. A rotating shaft support seat 17 is provided at one end of the support frame 401. A rotating shaft 16 is provided on the rotating shaft support seat 17. The platform frame 502 is rotatably connected to the rotating shaft support seat 17 through a rotating shaft 26. The platform frame 502 and the bottom support seat 4 are preferably made of a steel structure frame. The steel structure has high strength, is convenient to transport, and is simple to assemble.

[0049] The driving mechanism includes a driving roller 14 and a plurality of supporting rollers 15. Both ends of the driving roller 14 and the supporting rollers 15 are connected to the platform frame 502 through bearings, and the driving roller 14 is located in front of the supporting roller 15; a first motor 20 is arranged on the right side of the first crawler 6, and a second motor 22 is arranged on the right side of the second crawler 7. The first motor 20 and the second motor 22 are respectively fixed on the first motor bracket 21 and the second motor bracket 23. The first motor bracket 21 and the second motor bracket 23 are both welded to the right side of the platform frame 502, and the first motor cover 18 and the second motor cover 19 are respectively arranged on the outside of the first motor 20 and the second motor 22; the output shafts of the first motor 20 and the second motor 22 are both connected The first motor 20 and the second motor 22 are both electrically connected to the controller 24; the first motor 20 drives the driving roller 14 to rotate, and the driving roller 14 drives the first crawler 6 to make a rotary motion; the second motor 22 drives the driving roller 14 to rotate, and the driving roller 14 drives the second crawler 7 to make a rotary motion; the supporting roller 15 supports the first crawler 6 and the second crawler 7, thereby enhancing the load-bearing capacity of the detection platform; the first motor 20 is the same as the second motor 22, and the structures of the first crawler 6 and the second crawler 7 are the same. When performing exhaust gas detection on a four-wheel drive motor vehicle, the rotation speeds of the first crawler 6 and the second crawler 7 can be kept the same, and the speeds of the front and rear wheels of the vehicle and the crawlers can be kept the same.

[0050] A transmission tooth 1401 is provided on the surface of the driving roller 14, and the transmission tooth 1401 is located in the middle of the driving roller 14. Transmission grooves matching with the transmission tooth 1401 are provided on the inner sides of the first crawler 6 and the second crawler 7. Two positioning rings 1501 are provided on the surface of the supporting roller 15, and the two positioning rings 1501 are symmetrically arranged at both ends of the supporting roller 15. Positioning grooves matching with the positioning rings 1501 are provided on the inner sides of the first crawler 6 and the second crawler 7; the driving roller 14 is connected with the crawler through the transmission tooth 1401 to increase the transmission performance. The positioning ring 1501 is provided to facilitate the assembly of the crawler and prevent the crawler from shifting left and right when rotating.

[0051] The lifting mechanism 9 includes a triangular plate 901, a telescopic connecting rod 902, a hydraulic cylinder 903 and an articulated seat 904. The articulated seat 904 is welded to the supporting cross bar 402. The telescopic end of the telescopic connecting rod 902 and the fixed end of the hydraulic cylinder 903 are both articulated to the articulated seat 904. The fixed end of the telescopic connecting rod 902 is articulated to the left bottom corner of the triangular plate 901. The telescopic end of the hydraulic cylinder 903 is articulated to the top corner of the triangular plate 901. The right bottom corner of the triangular plate 901 is articulated to the platform frame 502. The hydraulic cylinder 903 is electrically connected to the controller 24. When the rotating platform 5 needs to be lifted, the output end of the hydraulic cylinder 903 is controlled to extend, driving one end of the rotating platform 5 to lift upward, and the other end of the rotating platform 5 is connected to the supporting base 4 through the rotating shaft 16, so that the rotating platform 5 forms a certain angle with the ground. Under the same speed conditions, the car requires greater traction when the body is horizontal, thereby simulating the detection of exhaust gas of the motor vehicle when driving on a slope. The angle of the rotating platform 5 can be set by controlling the stroke of the hydraulic cylinder 903, which can more effectively simulate the normal driving of the motor vehicle and improve the accuracy of exhaust gas detection.

[0052] The angle between the rotating platform 5 and the ground during exhaust gas detection is set to 30-45°, which can effectively detect the exhaust gas discharged by motor vehicles, and can also effectively prevent vehicles illegally modified into CNG from passing the exhaust gas detection.

[0053] As the vehicle tilts, the engine will also tilt. If the owner of the illegally modified CNG vehicle uses alcohol or other liquids as auxiliary fuel (through the water produced after combustion, the toxic and harmful gases are dissolved in water so that they can temporarily pass the exhaust gas detection of the motor vehicle inspection center and evade the national motor vehicle exhaust gas detection), the engine will tilt, and the water produced after combustion will enter other units of the engine, causing engine damage (similar to the engine of a water-damaged vehicle), which will cause engine failure and thus cannot evade detection. After a normal motor vehicle is started, a small amount of liquid similar to water will be discharged through the exhaust pipe. This detection device has no effect on motor vehicles that are normally filled with fuel or ethanol gasoline, and will not cause engine damage! Since the three-way catalytic converter of the illegally modified vehicle is completely damaged or failed, the driver of the illegally modified vehicle will add alcohol to evade detection, so more water is produced after combustion, which will cause engine damage. According to the relevant laws and regulations on modified vehicles, the motor vehicle driver shall bear all the responsibility for any traffic accidents or damage to the motor vehicle or traffic accidents or scrapping caused after the modification, and the insurance company can refuse to pay compensation. This can prevent car owners who illegally modify CNG from passing the inspection, reduce the accident rate of illegally modified vehicles, improve road driving safety, help reduce air pollution, and increase the control and management of automobile exhaust detection.

[0054] The protection device includes a protection pile 10 and a fixing ring 25, both of which are welded to the upper part of the automobile's safe rotating platform 5. The head of the automobile 2 is connected to the protection pile 10 through a first safety rope 12, and the tail of the automobile 2 is connected to the fixing ring 25 through a second safety rope 13. During the detection process, the front and rear positions of the automobile 2 are fixed so that the wheels of the automobile are always kept on the track to prevent the automobile from rushing out of the detection platform. When performing a slope simulation test, the automobile can be prevented from sliding down the slope.

[0055] A powerful fan 11 is provided on the protection pile 10, and the powerful fan 11 is electrically connected to the controller 24. Starting the powerful fan 11 can simulate the wind resistance when the car is driving, increase the accuracy of the detection data, and can also cool the car engine to protect the engine.

[0056] The controller includes a first track control module, a second track control module, a rotating platform angle control module and a component force adjustment module; the first track control module and the second track control module are respectively used to control the first motor 20 and the second motor 22, so that the operating speed of the first track 6 and the second track 7 is consistent with the wheel speed, the rotating platform angle control module is used to control the hydraulic cylinder 904, so as to adjust the rotation angle of the rotating platform 5, and the wind force adjustment module is used to control the rotation speed of the powerful fan 11 and adjust the wind force according to different vehicle speeds.

[0057] The motor vehicle exhaust gas detection platform described in the present invention is not limited to the installation method of opening a foundation pit on the ground for assembly, but can also be directly installed on the ground, that is, the platform frame 502 is fixed on the ground, and a ramp is set at one end on the right side of the detection platform for the motor vehicle to drive to the rotating platform.

[0058] Working principle of the present invention:

[0059] The present invention provides a motor vehicle exhaust gas detection platform. When performing exhaust gas testing, a car 2 travels onto a rotating platform 5, and the front and rear wheels of the car 2 are respectively located on a first crawler track 6 and a second crawler track 7. The head of the car 2 is connected to a protective pile 10 through a first safety rope 12, and the tail of the car 2 is connected through a fixing ring 25 of a second safety rope 13. A master control computer 8 is connected to an OBD interface 201 on the car 2. The OBD is an on-board automatic diagnosis system, which can detect the working conditions of an engine electronic control system and other functional modules of the vehicle during the operation of the car. The master control computer 8 reads the real-time vehicle speed and engine information of the car, detects vehicle faults, and intelligently adjusts the rotation speeds of a first motor 20 and a second motor through a controller 24, controls the rotation speeds of the first crawler track 6 and the second crawler track 7, realizes synchronization between the vehicle speed and the speed of the crawler track, and simulates the vehicle driving state to perform exhaust gas detection. When a two-wheel drive vehicle is detected, only one crawler track needs to be started. When a four-wheel drive vehicle is detected for exhaust gas, two crawlers are controlled to adjust the speed for detection.

[0060] When performing exhaust gas detection on a simulated ramp driving, the output end of the hydraulic cylinder 903 is controlled to extend, driving one end of the rotating platform 5 to lift upward, and the other end of the rotating platform 5 is connected to the supporting base 4 through the rotating shaft 16, so that the rotating platform 5 forms a certain angle with the ground. Under the same speed conditions, the car requires greater traction when the body is horizontal, thereby simulating the exhaust gas of the motor vehicle when driving on a ramp. The angle of the rotating platform 5 can be set by controlling the stroke of the hydraulic cylinder 903, which can more effectively simulate the normal driving of the motor vehicle and improve the accuracy of the exhaust gas measurement.

[0061] When the angle between the rotating platform 5 and the ground is rotated to 30-45°, it can effectively detect the exhaust gas discharged by the motor vehicle, and can also effectively prevent the vehicles that have been illegally modified into CNG from passing the exhaust gas detection. The owners of the vehicles that have illegally modified into CNG use liquids such as alcohol as auxiliary fuels, which will cause the engine to tilt, and the water produced after combustion will enter other units of the engine, causing damage to the engine and causing engine failure, which will make it impossible to escape detection, thereby improving road driving safety, helping to reduce air pollution, and increasing the control of automobile exhaust detection.

[0062] The head and tail of the car 2 are both connected to the protective device, which can prevent the car from sliding down the slope during the slope simulation test, effectively prevent accidents during the test, and increase the safety of the test platform.

[0063] By controlling the rotation speed of the powerful fan 11, the wind resistance of the car when driving can be simulated to increase the accuracy of the detection data, and the car engine can also be cooled to protect the engine.

[0064] The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A motor vehicle exhaust gas detection platform, comprising a supporting base, a rotating platform, an exhaust gas monitoring device, a controller, a master control computer and a vehicle, characterized in that: An OBD interface is provided in the automobile, and the OBD interface is electrically connected to the master control computer. A foundation pit is provided on the ground of the exhaust gas detection center, and a support base and a rotating platform are located in the foundation pit. One end of the rotating platform is rotatably connected to the support base, and when the rotating platform is in a horizontal state, its upper surface is flush with the ground; a lifting mechanism is provided at the lower part of the rotating platform, and the lifting mechanism is located between the support base and the rotating platform; a first crawler and a second crawler are provided on the rotating platform, and a driving mechanism is provided at the lower part of the first crawler and the second crawler, and the front and rear wheels of the automobile are respectively located on the first crawler and the second crawler; a detector of the exhaust gas monitoring device is connected to the exhaust pipe of the automobile, and the exhaust gas monitoring device and the controller are electrically connected to the master control computer; a protective device is provided on the rotating platform, and the head and tail of the automobile are connected to the protective device; The rotating platform comprises a cover plate and a platform frame, wherein the cover plate is detachably connected to the upper part of the platform frame, and two crawler track mounting grooves are provided on the cover plate, and the upper surface of the cover plate is flush with the upper surfaces of the first crawler track and the second crawler track; The support base includes a support frame and a support cross bar. The two sides of the support frame are connected by a plurality of support cross bars. The number of the support cross bars is three. A rotating shaft support seat is arranged at one end of the support frame. A rotating shaft support seat is arranged on the rotating shaft support seat. The platform frame and the rotating shaft support seat are rotatably connected through the rotating shaft. Both the platform frame and the bottom support seat are made of steel structure frames. The driving mechanism includes a driving roller and a plurality of supporting rollers, both ends of the driving roller and the supporting roller are connected to the platform frame through bearings, and the driving roller is located in front of the supporting roller; a first motor is arranged on the right side of the first crawler, and a second motor is arranged on the right side of the second crawler, the first motor and the second motor are respectively fixed on the first motor bracket and the second motor bracket, the first motor bracket and the second motor bracket are both welded to the right side of the platform frame, and the first motor cover and the second motor cover are respectively arranged on the outside of the first motor and the second motor; the output shafts of the first motor and the second motor are connected to one end of the driving roller through a coupling, and the first motor and the second motor are both electrically connected to the controller; The first motor is the same as the second motor, and the first crawler track and the second crawler track have the same structure. When performing exhaust gas detection on a four-wheel drive motor vehicle, the rotation speeds of the first crawler track and the second crawler track can be kept the same, and the speeds of the front and rear wheels of the vehicle and the crawler track can be kept the same; The driving roller is provided with a transmission tooth on its surface, the transmission tooth is located in the middle of the driving roller, the first crawler and the second crawler are provided with a transmission groove matching with the transmission tooth on their inner sides, the supporting roller is provided with two positioning rings on its surface, the two positioning rings are symmetrically arranged at both ends of the supporting roller, and the first crawler and the second crawler are provided with a positioning groove matching with the positioning ring on their inner sides; The angle between the rotating platform and the ground is set to 30-45° during exhaust gas detection; The controller includes a first crawler track control module, a second crawler track control module, a rotating platform angle control module and a force component adjustment module; the first crawler track control module and the second crawler track control module are respectively used to control the first motor and the second motor, so that the operating speeds of the first crawler track and the second crawler track are consistent with the wheel speed; the rotating platform angle control module is used to control the hydraulic cylinder to adjust the rotating angle of the rotating platform; the wind force adjustment module is used to control the speed of the powerful fan and adjust the wind force according to different vehicle speeds; When conducting exhaust gas testing, the car drives onto the rotating platform, the front and rear wheels of the car are respectively located on the first track and the second track, and the head and tail of the car are connected to the protective device; the master control computer is connected to the OBD interface of the car, the master control computer reads the real-time vehicle speed and engine information of the car, and intelligently adjusts the rotation speed of the first track and the second track through the controller to synchronize the vehicle speed with the speed of the track, so as to conduct exhaust gas testing to prevent accidents of engine damage caused by stepping on the accelerator, and there is no excessive tire jumping to damage the tire or wheel hub; when testing a two-wheel drive vehicle, only one track needs to be started, and when a four-wheel drive vehicle is tested for exhaust gas, the two tracks are controlled to adjust the speed for testing; the rotation angle of the rotating platform is adjusted by controlling the lifting mechanism, and the exhaust gas emitted is tested by simulating ramp driving.

2. A motor vehicle exhaust detection platform according to claim 1, characterized in that: The lifting mechanism includes a triangle plate, a telescopic connecting rod, a hydraulic cylinder and an articulated seat. The articulated seat is welded to the supporting cross bar. The telescopic end of the telescopic connecting rod and the fixed end of the hydraulic cylinder are both articulated to the articulated seat. The fixed end of the telescopic connecting rod is articulated to the left bottom angle position of the triangle plate, the telescopic end of the hydraulic cylinder is articulated to the top angle position of the triangle plate, the right bottom angle position of the triangle plate is articulated to the platform frame, and the hydraulic cylinder is electrically connected to the controller.

3. A motor vehicle exhaust detection platform according to claim 2, characterized in that: The protection device comprises a protection pile and a fixing ring, both of which are welded to the upper part of the safety rotating platform of the car, the head of the car is connected to the protection pile through a first safety rope, and the tail of the car is connected through a second safety rope fixing ring.

4. A motor vehicle exhaust detection platform according to claim 3, characterized in that: A powerful fan is arranged on the protection pile, and the powerful fan is electrically connected to the controller.

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