Portable emission test system for automobile

Abstract

The invention provides an automobile portable emission testing system, belongs to the technical field of automobile exhaust testing, and solves the technical problems that an existing emission testing system is large in size, not portable, low in testing efficiency, poor in vehicle adaptability and the like. Comprising a mounting bearing frame, a wireless communication module, a cloud server, a system controller and an OBD adapter, the system controller and the OBD adapter are placed in a compartment, a plurality of folding supporting wheels are arranged on the lower side of the mounting bearing frame, a plurality of positioning locking sliding seats are arranged on the front side of the mounting bearing frame, trailer connecting pieces are arranged on the positioning locking sliding seats, and an environment monitoring mechanism is arranged on the mounting bearing frame. A plurality of auxiliary connecting pieces are arranged on the front side of the upper end of the mounting bearing frame, a tail gas detection module is arranged on the rear side of the upper end of the mounting bearing frame, a tail gas collection mechanism is arranged on the front side of the lower end of the mounting bearing frame, and a tail gas flow evaluation mechanism is arranged on the rear side of the lower end of the mounting bearing frame. The system adopts an integrated framework, is highly integrated and portable, is high in vehicle adaptability, and can stably and efficiently carry out emission test evaluation.

Description

Technical Field

[0001] The invention belongs to the technical field of automobile exhaust testing, and relates to an automobile emission testing system, in particular to a portable automobile emission testing system. Background Art

[0002] With global concern about air pollution and greenhouse gas emissions, governments around the world have successively introduced stricter vehicle emissions standards. Limitations of traditional emissions testing: Laboratory testing cannot reflect real-world road emissions: The laboratory environment differs significantly from actual road driving, resulting in test results that are inconsistent with actual emissions. Testing equipment is bulky and expensive: Traditional emissions analyzers are large and complex to install, making them suitable only for specialized testing institutions and difficult to popularize. Inability to monitor vehicle emissions in real time: Existing methods are mostly post-test methods, unable to provide dynamic warnings for abnormal emissions during vehicle operation.

[0003] Existing portable emissions testing systems have shortcomings: They are bulky and heavy, making installation difficult and impacting vehicle operation. Sensors are susceptible to environmental interference (such as temperature, humidity, and vibration), leading to measurement errors. Data processing capabilities are limited, making it impossible to analyze the causes of emissions exceeding standards in real time. High costs also hinder their adoption by dealerships, repair shops, or among vehicle owners.

[0004] Therefore, we propose a portable automobile emission testing system. Summary of the Invention

[0005] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose a portable automobile emission testing system. The technical problem to be solved by this invention is: how to achieve portable installation adapted to different vehicles to meet the requirements of stable and efficient emission test evaluation.

[0006] The purpose of the present invention can be achieved through the following technical solutions: A portable automobile emission testing system includes a mounting bracket, a wireless communication module, a cloud server, and a system controller and an OBD adapter placed in the vehicle compartment. The lower side of the mounting bracket is provided with a plurality of retractable support wheels, the front side of the mounting bracket is adjustably provided with a plurality of position adjustment and locking slides, the position adjustment and locking slides are detachably provided with a trailer connector, the mounting bracket is provided with an environmental monitoring mechanism, the upper front side of the mounting bracket is provided with a plurality of auxiliary connectors, the upper rear side of the mounting bracket is provided with an exhaust gas detection module, the lower front side of the mounting bracket is provided with an exhaust gas collection mechanism, and the lower rear side of the mounting bracket is provided with an exhaust gas flow evaluation mechanism. The exhaust gas detection module is connected to the exhaust gas collection mechanism and the exhaust gas flow evaluation mechanism respectively through pipelines.

[0007] The working principle of the present invention is as follows: according to the shape of the vehicle floor of different cars, a certain number of adjusting and locking slides are selected, and the positions of the adjusting and locking slides are adjusted, so that they are installed and connected to the vehicle floor through a number of trailer connectors, and connected to the vehicle body through a number of auxiliary connectors; a load-bearing frame is installed as the main support structure, integrating various functional modules, and equipped with retractable support wheels for easy movement; the exhaust gas detection module is used to analyze the exhaust gas composition; the exhaust gas collection mechanism is connected to the vehicle exhaust pipe and is responsible for collecting exhaust gas samples from the exhaust pipe; the exhaust gas flow evaluation mechanism measures the exhaust gas flow and calculates the pollutant emission rate in combination with the component data; the environmental monitoring mechanism detects the ambient temperature, humidity, air pressure and other parameters for data compensation and correction of the exhaust gas detection results; the OBD adapter obtains the real-time engine data through the vehicle OBD interface, aligns it with the exhaust gas data in time, and establishes an emission-operating condition correlation model; the wireless communication module uploads the processed data to the cloud server, and generates the following outputs: real-time emission curve; driving cycle emission report; exceedance alarm and maintenance suggestion, supporting remote monitoring and management; The system controller coordinates the operation of each module, processes data and executes the emission analysis algorithm. The system controller executes the following core algorithms: Pollutant emission rate calculation: Combines the exhaust gas component concentration and flow data to calculate the mass emission of pollutants per unit time; Dynamic threshold comparison: According to the National VI and other regulatory standards, judge whether the standard is exceeded; Fault diagnosis: Through the abnormal correlation between emission data and OBD parameters, problems such as catalytic converter failure and oxygen sensor failure are identified.

[0008] The two lever of the rear frame is connected with the up-down knob on the top of the gear train, and the two lever arms are connected with the up-down knob on the top of the gear train, so that the two block gears are connected in a straight line and the gears are locked.

[0009] The above structure is adopted for telescopic adjustment: loosen the tightening studs on both sides so that the sliding rod can slide freely in the sliding cavity rod to adapt to different vehicle lengths. After adjusting to the required length, tighten the tightening studs, and the top end of the studs presses against the lower end of the sliding rod to achieve rigid fixation through friction; the sliding adjustment rod is used to install several adjustment locking slides and adjust their positions to adapt to different vehicle widths; the first hook cooperates with the second hook to provide a multi-point lifting interface for quick loading and unloading; the retractable support wheels are unfolded when moving to facilitate the movement of the device, and are retracted during testing to maintain stability and avoid driving collisions; the anti-collision column cushions the impact of collisions when the vehicle is reversing or in a crowded environment; the fill light illuminates the license plate and the test area to meet the needs of night operations; the auxiliary taillight synchronizes the vehicle taillight signal to improve road safety; the license plate frame is used to fix the vehicle license plate to avoid blocking the original license plate and comply with traffic regulations.

[0010] The positioning locking slide includes a lower cover seat, a vertical cross seat and an upper top seat. The lower end and the upper end of the vertical cross seat are each provided with four symmetrical screw holes. The lower cover seat is locked to the lower end of the vertical cross seat through a number of locking screws and the screw holes corresponding to the lower end. The lower cover seat and the vertical cross seat cooperate to form a lower clamping cavity. The lower clamping cavity is clamped and slides on the sliding positioning rod. The upper top seat is locked to the upper end of the vertical cross seat through a number of locking screws and the screw holes corresponding to the upper end. The upper top seat and the vertical cross seat cooperate to form an upper clamping cavity. The upper clamping cavity is vertically arranged. Locking screws are provided at the upper and lower places of the vertical cross seat. The two locking screws pass through the upper clamping cavity and the lower clamping cavity respectively.

[0011] The above structure is adopted for horizontal adjustment. The locking of several locking screws and the screw holes corresponding to the lower end are loosened, so that the engaging cavity formed by the lower cover seat and the vertical cross seat can slide freely on the sliding adjustment rod. The locking screw at the lower end is used to stabilize the lower engaging cavity formed by the lower cover seat and the vertical cross seat, which can slide freely on the sliding adjustment rod to adjust the horizontal position. After adjusting the horizontal position and aligning with the target position, several locking screws and the screw holes corresponding to the lower end are locked, and the adjustment locking slide is fixed by friction; the upper engaging cavity is used to lock the trailer connector, and the locking screw at the upper end is used to lock the trailer connector and stabilize it on the upper engaging cavity formed by the upper top seat and the vertical cross seat to slide freely back and forth. The double-cavity vertical cross design: the lower engaging cavity and the upper engaging cavity do not interfere with each other, realizing two-dimensional independent adjustment.

[0012] The trailer connecting part includes a trailer connecting rod, which is inserted into the upper engaging cavity of the adjusting locking slide at the corresponding position. A mounting plate is provided at the lower end of the trailer connecting rod. Locking through holes are provided on the trailer connecting rod and the sliding adjusting rod. The upper and lower locking screws respectively pass through the locking through holes of the trailer connecting rod and the sliding adjusting rod.

[0013] With the above structure, the trailer connecting rod is inserted into the upper engaging cavity of the adjusting and locking slide according to the shape of the vehicle floor of different cars. The trailer connecting rod is stably mounted on the upper engaging cavity formed by the upper top seat and the vertical cross seat, and can slide freely back and forth. The position of the trailer connecting rod and the mounting plate is adjusted, and the upper and lower locking screws respectively penetrate the locking through hole of the trailer connecting rod and the locking through hole of the sliding adjusting rod to facilitate sliding and prevent falling off. The trailer connecting rod and the mounting plate cooperate to be stably mounted and connected to the vehicle floor. The force transmission path is traction → mounting plate + trailer connecting rod → adjusting and locking slide → sliding adjusting rod → the entire mounting support frame.

[0014] The exhaust gas detection module includes a chassis, which is arranged on two load-bearing beams. A flip top cover is hinged on the front side of the upper end of the chassis, and a mounting through-hole is provided on the flip top cover. Side panels are hinged on both sides of the chassis, and door locks are provided on the side panels. The door locks are locked on the flip top cover. A gas mass spectrometer, a heating filter, a power distribution box, a particulate matter detector, an air duct and several batteries are provided inside the chassis. The heating filter and the power distribution box are arranged at the upper end of the gas mass spectrometer, and the heating filter is opposite to the mounting through-hole. The particulate matter detector, the air duct and several batteries are located on the front side of the gas mass spectrometer. An air outlet connector is provided on the side panel on the right, and the air outlet connector is connected to the air duct. The heating filter, the gas mass spectrometer, the particulate matter detector and the air duct are connected in sequence through pipes. The side of the chassis is provided with several waterproof connectors connected thereto.

[0015] With the above structure, the chassis, flip top cover and two side panels are matched, and the flip top cover and the two side panels are locked by a door lock to form the box body of the exhaust gas detection module; intake pretreatment: the exhaust gas enters the heating filter through the installation hole, is heated and dehumidified, and large particulate matter is filtered; component analysis: the pretreated gas enters the gas mass spectrometer, and the concentration of components such as NOx / CO / HC / CO2 is detected in real time; particulate matter detection: the diverted gas enters the particulate matter detector, and the PM. / PM2.5 concentration is measured using the laser scattering method; exhaust gas discharge: after detection, the gas is discharged through the air duct → outlet connector; power supply: the power supply is connected through the waterproof connector, the battery provides emergency power supply, and the power distribution box intelligently manages the power consumption of each component.

[0016] The exhaust gas flow evaluation mechanism includes two connecting seats, which are fixed to the lower end of the rear support beam. The lower end of the connecting seat is provided with a mounting block, and the mounting block is detachably provided with a fixed clamping plate. A flow evaluator is provided between the two fixed clamping plates, and the left and right ends of the flow evaluator are respectively provided with an outlet pipe and an inlet pipe, and the inlet pipe and the outlet joint are connected by a pipe.

[0017] With the above structure, gas introduction: the detected exhaust gas enters the flow evaluator from the exhaust joint → the intake pipe; dynamic measurement: the ultrasonic time difference method principle is used to measure the flow velocity and flow in real time; data output: the flow signal is transmitted to the system controller, and the pollutant mass emission rate is calculated in combination with the gas concentration; gas discharge: the exhaust gas after measurement passes through the exhaust pipe → the external exhaust pipe; quick disassembly and assembly design: two connecting seats are fixed to the lower end of the rear load-bearing beam, and the fixed clamping plate is detachably fixed to the mounting block; replacement can be completed without the aid of tools.

[0018] The folding support wheel includes a mounting frame, which is fixed to the lower end of the sliding cavity rod, and a hinged link 1 is fixed to the lower end of the mounting frame, and the lower end of the hinged link 1 is hinged to the hinged link 2, and the lower end of the hinged link 2 is fixed to a shock-absorbing wheel seat, and a folding electric push rod is hinged between the shock-absorbing wheel seat and the mounting frame, and a plurality of walking wheels are provided at the lower end of the shock-absorbing wheel seat.

[0019] With the above structure, the unfolding process is as follows: the folding electric push rod extends → pushes the second articulated link to rotate around the hinge point, and the travel wheel moves down to touch the ground → facilitating the installation and movement of the carrier frame; the folding process is as follows: the folding electric push rod contracts → pulls the second articulated link to reset, and the travel wheel is lifted off the ground → the vehicle moves; the shock-absorbing wheel seat has a built-in coil spring + hydraulic damper, which can absorb % of the vibration energy of the road surface, and automatic leveling: the load of each wheel is detected by the pressure sensor, and the folding electric push rod is fine-tuned to maintain the level.

[0020] The exhaust gas collection mechanism includes an F-type connecting pipe and a linkage collection pipe connected to the two side ends of the F-type connecting pipe through a sealed connecting pipe, and a dynamic flow controller. The inlet end of the F-type connecting pipe and the inlet end of the linkage collection pipe are both connected to a flexible bellows, and the flexible bellows are both connected to a soft air intake pipe. The F-type connecting pipe, the linkage collection pipe and the dynamic flow controller are all provided with mounting clamps, and the mounting clamps are connected to the lower ends of the two sliding cavity rods. The dynamic flow controller and the heating filter are connected by a pipe.

[0021] With the above structure, the sealed connecting pipe is used to stably connect the linkage header and the dynamic flow controller, the soft intake pipe is inserted into the vehicle exhaust pipe, and the exhaust gas is transported to the F-type connecting pipe and the linkage header through the flexible bellows. The exhaust gas enters the dynamic flow controller, which monitors the flow in real time, adjusts the opening through the electric valve, maintains a constant flow, and injects the heated filter through the pipeline; adaptive installation: the flexible bellows is used to compensate for the vibration displacement of the vehicle exhaust pipe; the linkage header and the dynamic flow controller are both provided with mounting clips, which are connected to the lower ends of the two sliding cavity rods to quickly install the exhaust gas collection mechanism under the mounting support frame.

[0022] The environmental monitoring mechanism includes an installation chassis, which is fixed on one of the sliding cavity rods. A warning light, a temperature sensor, a humidity sensor and an atmospheric pressure sensor are provided on the outside of the installation chassis. A battery and a noise sensor are connected by a pipe inside the installation chassis, and a wireless communication module is placed inside the installation chassis.

[0023] Using the above structure, the temperature sensor monitors the atmospheric temperature, the humidity sensor monitors the atmospheric humidity, and the atmospheric pressure sensor monitors the atmospheric pressure; the noise sensor monitors the driving noise, and the data fusion of the noise sensor and the exhaust gas detection module is used to identify the correlation between the peak of particulate matter emissions and specific noise frequencies, and assist in judging abnormal engine combustion or failure of the after-treatment device; the warning light is used for alarm processing in emergency situations, and the storage battery provides power.

[0024] The auxiliary connecting part includes a main basket bolt, an oblique basket bolt is provided on the main basket bolt, a connecting hook is provided at the upper end of the main basket bolt, a connecting ring is provided at the lower end of the main basket bolt and the lower end of the oblique basket bolt, a base is screwed on the connecting ring, and the base is arranged at the upper end of the sliding cavity rod.

[0025] With the above structure, the connecting hook is connected to the vehicle body, and the base is set at the upper end of the sliding cavity rod. The main basket bolt is rotated to adjust the length to ensure the stability of the installed load frame. The length of the diagonal basket bolt is adjusted simultaneously to form a diagonal tension to offset lateral vibration. The force balance is locked: the double basket bolts are coordinated to adjust to the preset tension value.

[0026] The system controller includes an integrated data acquisition and analysis unit for receiving and processing real-time data from the gas analysis module, PN analysis module and flow meter module, and generating calculation results of the mass of discharged pollutants; The system controller has a built-in algorithm that complies with RDE regulations, calculates pollutant mass emission values ​​and PN concentrations in real time, and generates test reports; The test report includes an RDE compliance assessment report, a driving behavior scoring report, and a maintenance recommendation report. The RDE compliance assessment report calculates the moving average window (MAW) concentrations of CO, NOx, and PN based on the WLTC or a custom driving cycle; the driving behavior scoring report generates a driver environmental index based on the frequency of sudden acceleration, sudden braking, and speeding events; and the maintenance recommendation report recommends targeted maintenance plans based on emission exceeding standard data and engine fault codes. The system controller includes a vehicle driving data acquisition unit, which integrates a vehicle speed sensor, a vehicle GPS positioning subunit, a vehicle accelerometer, a vehicle gyroscope, an image recognition subunit, and an over-standard warning subunit. The vehicle speed sensor, vehicle GPS positioning subunit, vehicle accelerometer, and vehicle gyroscope are used to collect vehicle driving speed, geographic location, acceleration, slope, and bumpy road condition data in real time, and correlate the emission data with vehicle driving speed, acceleration, and road condition level to create a model, outputting pollution emission characteristic curves under different driving behaviors; The image recognition subunit captures road type and traffic status data in real time through on-board cameras or radars; The system controller connects to the vehicle ECU via the OBD adapter to obtain engine speed, torque, fuel consumption rate and fault code information; the system controller also obtains real-time parameters of engine speed and load via the OBD adapter; When the real-time emission value of the excessive warning subunit exceeds the preset threshold, an audible and visual alarm is triggered and the violation time period and corresponding geographical location are recorded.

[0027] Compared with existing technologies, this portable automobile emission test system has the following advantages: By installing the carrier frame and the adjustment and locking slide, as well as the adjustment and locking slide and the trailer connector, the left and right position adjustment and the front and rear position adjustment of the trailer connector can be achieved. It can match the floor of different models of cars and has high adaptability for installation and use. By cooperating with a plurality of trailer connectors and a plurality of auxiliary connectors, the mounting bracket is ensured to be more stably mounted and connected to the rear of the inspection vehicle; Integrated architecture: The exhaust gas collection mechanism, exhaust gas detection module, exhaust gas flow assessment mechanism, and environmental monitoring mechanism are highly integrated on the mounting frame, with a modular architecture design to optimize space.

[0028] By installing a load-bearing frame and a plurality of retractable support wheels, it is easy to move and more convenient to install. At the same time, when the vehicle is driving for inspection, the plurality of retractable support wheels can be retracted off the ground to reduce vibration and walking interference.

[0029] The exhaust gas collection mechanism is connected to the vehicle exhaust pipe, which is stable. The dynamic flow controller can monitor the flow in real time and adjust the opening of the electric valve to maintain a constant flow. The exhaust gas detection module can perform real-time gas composition analysis and particulate matter detection, with stable and high detection efficiency; Environmental monitoring devices monitor atmospheric temperature, humidity, and pressure in real time. Meanwhile, noise sensors monitor driving noise. Data fusion between the noise sensors and the exhaust gas detection module identifies the correlation between peaks in particulate matter emissions and specific noise frequencies, assisting in determining abnormal engine combustion or post-processing device failure. Dynamic measurement of flow velocity and flow rate is achieved through the exhaust gas flow evaluation mechanism; The system controller can generate test reports, including RDE compliance assessment reports, driving behavior score reports and maintenance recommendation reports; and can perform correlation modeling based on vehicle driving data, road type data, etc., to output pollution emission characteristic curves under different driving behaviors. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0031] Figure 2 It is a front perspective view of the trailer connector and the mounting bracket of the present invention.

[0032] Figure 3 It is a rear perspective view of the trailer connector and the mounting bracket of the present invention.

[0033] Figure 4 It is a right perspective view of the exhaust gas detection module in the present invention when the box cover is opened.

[0034] Figure 5 It is a left perspective view of the exhaust gas detection module in the present invention when the box cover is opened.

[0035] Figure 6 It is a structural diagram of the exhaust gas flow evaluation mechanism in the present invention.

[0036] Figure 7 It is a structural schematic diagram of the foldable support wheel in the present invention.

[0037] Figure 8 It is a structural diagram of the environmental monitoring mechanism in the present invention.

[0038] Figure 9 It is a structural schematic diagram of the tail gas collection mechanism in the present invention.

[0039] In the figure, 1. mounting frame; 2. exhaust gas detection module; 3. environmental monitoring mechanism; 4. trailer connector; 5. retractable support wheel; 6. exhaust gas collection mechanism; 7. exhaust gas flow assessment mechanism; 8. lower cover seat; 9. vertical cross seat; 10. locking screw; 11. screw hole; 12. mounting plate; 13. trailer connecting rod; 14. locking through hole; 15. upper seat; 16. locking screw; 17. sliding adjustment rod; 18. adjustment locking slide 19. Sliding rod; 20. Crossbeam; 21. First hook; 22. Jacking screw seat; 23. Sliding rod; 24. Load-bearing beam; 25. Second hook; 26. Anti-collision column; 27. Fill light; 28. License plate frame; 29. ​​Auxiliary tail light; 30. Jacking stud; 31. Stopper; 32. Gas mass spectrometer; 33. Chassis; 34. Door lock; 35. Heating filter; 36. Power distribution box; 37. Battery; 38. Flip top cover; 39. Particle detector; 40. Air duct; 41. Air outlet connector; 42. Side panel; 43. Waterproof connector; 44. Connecting seat; 45. Mounting block; 46. Fixed snap plate; 47. Flow rate estimator; 48. Air outlet connecting pipe; 49. Air inlet connecting pipe; 50. Mounting bracket; 51. Articulated link 1; 52. Articulated link 2; 53. Shock-absorbing wheel seat; 54. Travel wheel; 55. Retractable electric push rod; 56. Install the chassis; 57. Warning Light; 58. Temperature sensor; 59. Humidity sensor; 60. Atmospheric pressure sensor; 61. Flexible bellows; 62. Soft air intake pipe; 63. F-type connecting pipe; 64. Linkage manifold; 65. Dynamic flow controller; 66. Sealing connecting pipe; 67. Mounting clamp; 68. Auxiliary connecting piece; 69. Connecting hook; 70. Main basket bolt; 71. Connecting ring; 72. Base; 73. Inclined basket bolt; 74. System controller. DETAILED DESCRIPTION

[0040] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0041] like Figures 1-9As shown, the portable emission testing system for automobiles includes a mounting frame 1, a wireless communication module, a cloud server, a system controller 74 and an OBD adapter placed in the vehicle compartment. A plurality of folding support wheels 5 are provided on the lower side of the mounting frame 1, a plurality of position adjustment and locking slides 18 are adjustably provided on the front side of the mounting frame 1, a trailer connector 4 is detachably provided on the position adjustment and locking slides 18, an environmental monitoring mechanism 3 is provided on the mounting frame 1, a plurality of auxiliary connectors 68 are provided on the upper front side of the mounting frame 1, an exhaust gas detection module 2 is provided on the upper rear side of the mounting frame 1, an exhaust gas collection mechanism 6 is provided on the lower front side of the mounting frame 1, an exhaust gas flow evaluation mechanism 7 is provided on the lower rear side of the mounting frame 1, and the exhaust gas detection module 2 is connected to the exhaust gas collection mechanism 6 and the exhaust gas flow evaluation mechanism 7 respectively through pipelines.

[0042] According to the shape of the car floor of different cars, a certain number of position-adjusting and locking slides 18 are selected and the positions of the position-adjusting and locking slides 18 are adjusted so that they are installed and connected to the car floor through a number of trailer connectors 4 and connected to the car body through a number of auxiliary connectors 68; the carrier frame 1 is installed as the main support structure, integrating various functional modules and equipped with retractable support wheels 5 for easy movement; the exhaust gas detection module 2 is used to analyze the exhaust gas components (such as NOx, CO, HC, CO2, etc.); the exhaust gas collection mechanism 6 is connected to the exhaust pipe of the car and is responsible for collecting exhaust gas samples from the exhaust pipe; the exhaust gas flow evaluation mechanism 7 measures the exhaust gas flow and combines the number of components to form a complete exhaust gas system. The pollutant emission rate is calculated based on the data; environmental monitoring agency 3 detects ambient temperature, humidity, air pressure and other parameters for data compensation and correction of exhaust gas test results; the OBD adapter obtains real-time engine data (speed, load, air-fuel ratio, etc.) through the vehicle's OBD interface, aligns it with the exhaust gas data in time, and establishes an emission-operating condition correlation model; the wireless communication module (such as 4G / 5G) uploads the processed data to the cloud server, generating the following outputs: real-time emission curves (such as NOx changes over time); driving cycle emission reports (compliant with RDE test requirements); exceedance alarms and maintenance recommendations (pushed via the app or web), supporting remote monitoring and management. The system controller 74 coordinates the operation of each module, processes data and executes the emission analysis algorithm. The system controller 74 executes the following core algorithms: Pollutant emission rate calculation: combining the exhaust component concentration and flow data to calculate the mass emission of pollutants per unit time (g / s or g / km); Dynamic threshold comparison: According to the National VI and other regulatory standards, determine whether the standards are exceeded; Fault diagnosis: through the abnormal correlation between emission data and OBD parameters, identify problems such as catalytic converter failure and oxygen sensor failure.

[0043] The mounting bracket 1 includes two symmetrical sliding cavity rods 19, a crossbeam 20 is fixed between the front and rear ends of the two sliding cavity rods 19, a first hook 21 is fixed at both ends of the crossbeam 20, a sliding rod 23 is slidably provided inside the two sliding cavity rods 19, a tightening screw seat 22 is fixed at the lower end of the two sliding cavity rods 19, the tightening screw seat 22 is connected to the sliding cavity rod 19, and a tightening stud 30 is screwed inside the tightening screw seat 22. The upper end of the tightening stud 30 extends into the interior of the sliding cavity rod 19 and abuts against the lower end of the sliding rod 23. The upper end of the sliding rod 23 is fixed to the rear Two supporting beams 24 are fixed on the side, a plurality of stoppers 31 are fixed to the front end of the front supporting beam 24, a second hook 25 is fixed to both ends of the front supporting beam 24, and two left-right symmetrically arranged anti-collision columns 26 and two left-right symmetrically arranged auxiliary tail lights 29 are fixed to the rear end of the rear supporting beam 24. Fill lights 27 are provided at the rear end and lower end of the rear supporting beam 24. A license plate frame 28 is fixed to the lower end of the rear supporting beam 24, and the license plate frame 28 is located between the two fill lights 27. A sliding adjustment rod 17 is provided at the front end of the two sliding cavity rods 19.

[0044] Telescopic adjustment: Loosen the tightening studs 30 on both sides so that the sliding rod 23 can slide freely in the sliding cavity rod 19 to adapt to different vehicle lengths. After adjusting to the required length, tighten the tightening studs 30, and its top end presses against the lower end of the sliding rod 23 to achieve rigid fixation through friction; the sliding adjustment rod 17 is used to install several adjustment locking slides 18 and adjust their positions to adapt to different vehicle widths; the first hook 21 cooperates with the second hook 25 to provide a multi-point lifting interface for easy and quick loading and unloading; the retractable support wheel 5 is unfolded when moving to facilitate the movement of the device, and is retracted during testing to maintain stability and avoid driving collisions; the anti-collision column 26 cushions the impact of collisions when the vehicle is reversing or in a crowded environment; the fill light 27 illuminates the license plate and test area to meet the needs of night operations; the auxiliary taillight 29 synchronizes the vehicle taillight signals (brake / turn) to improve road safety; the license plate frame 28 is used to fix the vehicle license plate to avoid blocking the original license plate and comply with traffic regulations.

[0045] The positioning and locking slide 18 includes a lower cover seat 8, a vertical cross seat 9 and an upper top seat 15. The lower and upper ends of the vertical cross seat 9 are provided with four symmetrical screw holes 11. The lower cover seat 8 is locked to the lower end of the vertical cross seat 9 through a number of locking screws 16 and the corresponding screw holes 11 at the lower end. The lower cover seat 8 and the vertical cross seat 9 cooperate to form a lower engaging cavity. The lower engaging cavity is engaged and slides on the sliding adjustment rod 17. The upper top seat 15 is locked to the upper end of the vertical cross seat 9 through a number of locking screws 16 and the corresponding screw holes 11 at the upper end. The upper top seat 15 and the vertical cross seat 9 cooperate to form an upper engaging cavity. The upper engaging cavity is vertically arranged. Locking screws 10 are provided at the upper and lower parts of the vertical cross seat 9. The two locking screws 10 pass through the upper engaging cavity and the lower engaging cavity respectively.

[0046] Horizontal adjustment, loosen the lock of several locking screws 16 and the screw holes 11 corresponding to the lower ends, so that the locking cavity formed by the lower cover seat 8 and the vertical cross seat 9 can slide freely on the sliding adjustment rod 17, and the locking screw 10 at the lower end is used to stabilize the lower locking cavity formed by the lower cover seat 8 and the vertical cross seat 9. It can slide freely on the sliding adjustment rod 17 to adjust the horizontal position. After adjusting the horizontal position and aligning with the target position, several locking screws 16 are locked with the screw holes 11 corresponding to the lower ends, and the adjustment locking slide 18 is fixed by friction; the upper locking cavity is used to lock the trailer connector 4, and the upper locking screw 10 is used to lock the trailer connector 4 and stabilize it on the upper locking cavity formed by the upper top seat 15 and the vertical cross seat 9 to slide freely back and forth. Double-cavity vertical cross design: the lower locking cavity (horizontally) and the upper locking cavity (vertically) do not interfere with each other, realizing two-dimensional independent adjustment.

[0047] The trailer connector 4 includes a trailer link 13, which is inserted into the upper engaging cavity of the positioning locking slide 18 at the corresponding position. A mounting plate 12 is provided at the lower end of the trailer link 13. Locking through holes 14 are provided on the trailer link 13 and the sliding positioning rod 17. The upper and lower locking screws 10 respectively pass through the locking through holes 14 of the trailer link 13 and the locking through holes 14 of the sliding positioning rod 17.

[0048] According to the shape of the car floor of different cars, the trailer link 13 is inserted into the upper engaging cavity of the adjusting locking slide 18. The trailer link 13 is stabilized on the upper engaging cavity formed by the upper top seat 15 and the vertical cross seat 9 and can slide freely back and forth. The position of the trailer link 13 and the mounting plate 12 is adjusted. The upper and lower locking screws 10 respectively penetrate the locking through hole 14 of the trailer link 13 and the locking through hole 14 of the sliding adjusting rod 17 to facilitate sliding and prevent falling off; the trailer link 13 and the mounting plate 12 cooperate to be stably installed and connected on the car floor; the force transmission path is traction → mounting plate 12 + trailer link 13 → adjusting locking slide 18 → sliding adjusting rod 17 → the entire mounting carrier 1.

[0049] The exhaust gas detection module 2 includes a chassis 33, which is set on two load-bearing beams 24. The upper front side of the chassis 33 is hinged with a flip cover 38, and the flip cover 38 is provided with a mounting through hole. Both sides of the chassis 33 are hinged with side panels 42, and the side panels 42 are provided with door locks 34. The door locks 34 are locked on the flip cover 38. The interior of the chassis 33 is provided with a gas mass spectrometer 32, a heating filter 35, a power distribution box 36, a particulate matter detector 39, an air duct 40 and a number of batteries 37. The heating filter 35 5 and the power distribution box 36 are arranged at the upper end of the gas mass spectrometer 32, the heating filter 35 is opposite to the installation through hole, the particulate matter detector 39, the air duct 40 and several batteries 37 are located in front of the gas mass spectrometer 32, and the right side panel 42 is provided with an air outlet connector 41, which is connected to the air duct 40. The heating filter 35, the gas mass spectrometer 32, the particulate matter detector 39 and the air duct 40 are connected in sequence through pipes. The side of the chassis 33 is provided with several waterproof connectors 43 connected thereto.

[0050] The chassis 33, the flip top cover 38 and the two side panels 42 cooperate with each other, and the flip top cover 38 and the two side panels 42 are locked by the door lock 34 to form a box body of the exhaust gas detection module 2; Intake air pretreatment: exhaust gas enters the heating filter 35 through the installation hole, where it is heated, dehumidified and large particles are filtered (constant temperature of 200°C); Component analysis: The pre-treated gas enters the gas mass spectrometer 32 to detect the concentration of components such as NOx / CO / HC / CO2 in real time; Particle detection: The diverted gas enters the particle detector 39, and the PM2.5 / PM10 concentration is measured using the laser scattering method; Exhaust gas discharge: After detection, the gas is discharged through the air guide pipe 40 → the air outlet connector 41; Power supply: The power supply is connected through the waterproof connector 43, the battery 37 provides emergency power supply, and the power distribution box 36 intelligently manages the power consumption of each component.

[0051] The exhaust gas flow assessment mechanism 7 includes two connecting seats 44, which are fixed to the lower end of the rear support beam 24. The lower end of the connecting seat 44 is provided with a mounting block 45, and the mounting block 45 is detachably provided with a fixed clamping plate 46. A flow evaluator 47 is provided between the two fixed clamping plates 46. The left and right ends of the flow evaluator 47 are respectively provided with an outlet pipe 48 and an inlet pipe 49. The inlet pipe 49 is connected to the outlet joint 41 through a pipeline.

[0052] Gas introduction: The detected exhaust gas enters the flow evaluator 47 from the outlet connector 41 → the intake pipe 49; dynamic measurement: the ultrasonic time difference method is used to measure the flow velocity (0-30m / s) and flow rate (0-500L / min) in real time; data output: the flow signal is transmitted to the system controller 74, and the pollutant mass emission rate (g / s) is calculated in combination with the gas concentration; gas discharge: after measurement, the exhaust gas passes through the outlet pipe 48 → the external exhaust pipe; quick disassembly and assembly design: two connecting seats 44 are fixed to the lower end of the rear load-bearing beam 24, and the fixed clamping plate 46 is detachably fixed to the mounting block 45; it supports replacement without the aid of tools (during maintenance).

[0053] The folding support wheel 5 includes a mounting frame 50, which is fixed to the lower end of the sliding cavity rod 19. The lower end of the mounting frame 50 is fixed with an articulated link 1 51, the lower end of the articulated link 1 51 is hinged with an articulated link 2 52, the lower end of the articulated link 2 52 is fixed with a shock-absorbing wheel seat 53, and a folding electric push rod 55 is hinged between the shock-absorbing wheel seat 53 and the mounting frame 50. The lower end of the shock-absorbing wheel seat 53 is provided with a plurality of walking wheels 54.

[0054] With the above structure, the unfolding process is as follows: the folding electric push rod 55 extends → pushes the hinged link 2 52 to rotate around the hinge point, and the walking wheel 54 moves down to touch the ground → facilitates the installation and movement of the carrier frame 1; the folding process is as follows: the folding electric push rod 55 contracts → pulls the hinged link 2 52 to reset, and the walking wheel 54 is lifted off the ground → the vehicle moves; the shock-absorbing wheel seat 53 has a built-in coil spring + hydraulic damper, which can absorb 80% of the vibration energy of the road surface, and automatic leveling: the load of each wheel is detected by the pressure sensor, and the folding electric push rod 55 is fine-tuned to maintain the level (±3°).

[0055] The exhaust gas collection mechanism 6 includes an F-type connecting pipe 63 and a linkage collection pipe 64 connected to the two side ends of the F-type connecting pipe 63 through a sealing connecting pipe 66, and a dynamic flow controller 65. The inlet end of the F-type connecting pipe 63 and the inlet end of the linkage collection pipe 64 are both connected to a flexible bellows 61, and the flexible bellows 61 are both connected to a soft air intake pipe 62. The F-type connecting pipe 63, the linkage collection pipe 64 and the dynamic flow controller 65 are all provided with a mounting clamp 67, and the mounting clamp 67 is connected to the lower end of the two sliding cavity rods 19. The dynamic flow controller 65 is connected to the heating filter 35 through a pipeline.

[0056] The sealed connecting pipe 66 is used to stably connect the linkage manifold 64 and the dynamic flow controller 65. The soft air intake pipe 62 is inserted into the vehicle exhaust pipe, and the exhaust gas is transported to the F-type connecting pipe 63 and the linkage manifold 64 through the flexible bellows 61. The exhaust gas enters the dynamic flow controller 65, and the dynamic flow controller 65 monitors the flow rate in real time (0-100L / min). The opening is adjusted by the electric valve to maintain a constant flow rate (according to the requirements of the heating filter 35), and is injected into the heating filter 35 through the pipeline; adaptive installation: the flexible bellows 61 is used to compensate for the vibration displacement of the vehicle exhaust pipe (±30mm); the linkage manifold 64 and the dynamic flow controller 65 are both provided with mounting clips 67, and the mounting clips 67 are connected to the lower ends of the two sliding cavity rods 19 to quickly install the exhaust gas collection mechanism 6 under the mounting support frame 1.

[0057] The environmental monitoring mechanism 3 includes an installation chassis 56, which is fixed to one of the sliding cavity rods 19. A warning light 57, a temperature sensor 58, a humidity sensor 59 and an atmospheric pressure sensor 60 are provided on the outside of the installation chassis 56. A battery and a noise sensor are connected by a pipe inside the installation chassis 56, and a wireless communication module is placed inside the installation chassis 56.

[0058] The temperature sensor 58 monitors the atmospheric temperature, the humidity sensor 59 monitors the atmospheric humidity, and the atmospheric pressure sensor 60 monitors the atmospheric pressure; the noise sensor monitors driving noise, and the data fusion of the noise sensor and the exhaust gas detection module 2 is used to identify the correlation between the peak of particulate matter emissions and specific noise frequencies, and assist in judging abnormal engine combustion or failure of the after-treatment device; the warning light 57 is used to issue an alarm in an emergency, and the battery provides power.

[0059] The auxiliary connecting part 68 includes a main basket bolt 70, on which an oblique basket bolt 73 is provided. The upper end of the main basket bolt 70 is provided with a connecting hook 69, and the lower end of the main basket bolt 70 and the lower end of the oblique basket bolt 73 are provided with a connecting ring 71. The connecting ring 71 is screwed with a base 72, and the base 72 is set at the upper end of the sliding cavity rod 19.

[0060] The connecting hook 69 is connected to the body of the vehicle, and the base 72 is set at the upper end of the sliding cavity rod 19. The main basket bolt 70 is rotated to adjust the length to ensure the stability of the installation of the carrier frame 1; the length of the oblique basket bolt 73 is synchronously adjusted to form a 45° oblique tension to offset lateral vibration and force balance lock: the double basket bolts are coordinated to adjust to the preset tension value.

[0061] The system controller 74 includes an integrated data acquisition and analysis unit for receiving and processing real-time data from the gas analysis module, PN analysis module and flow meter module to generate emission pollutant mass calculation results; the system controller 74 has a built-in algorithm that complies with RDE regulations, calculates pollutant mass emission values ​​(unit: mg / km) and PN concentration (unit: pieces / km) in real time, and generates a test report that complies with GB 18352.6-2016 or Euro 6 standards; the test report includes an RDE compliance assessment report, a driving behavior scoring report and a maintenance recommendation report. The RDE compliance assessment report calculates the moving average window (MAW) concentration of CO, NOx and PN based on WLTC or a custom driving cycle; the driving behavior scoring report generates a driver environmental protection index based on the frequency of sudden acceleration, sudden braking and speeding events; the maintenance recommendation report recommends targeted maintenance plans based on the emission exceeding standard data and engine fault codes; the system controller 74 includes a vehicle driving data acquisition unit, which integrates a vehicle speed sensor, a vehicle GPS positioning subunit, a vehicle accelerometer, a vehicle gyroscope, an image recognition subunit and an exceeding standard warning subunit. The GPS positioning subunit, vehicle accelerometer and vehicle gyroscope are used to collect vehicle speed, geographic location, acceleration, slope and bumpy road condition data in real time, and correlate the emission data with vehicle speed, acceleration and road condition level (flat / bumpy / climbing) to model the pollution emission characteristic curves under different driving behaviors; the image recognition subunit captures road type (urban / suburban / highway) and traffic status data in real time through the on-board camera or radar; the system controller 74 is connected to the vehicle ECU through the OBD adapter to obtain engine speed, torque, fuel consumption rate and fault code information; the real-time parameters of engine speed and load are obtained through the OBD adapter; when the real-time emission value of the excessive warning subunit exceeds the preset threshold (such as the Euro 6 standard), an audible and visual alarm is triggered and the violation time period and corresponding geographic location are recorded.

[0062] The working principle of the present invention is as follows: a carrier frame 1 is installed as the main supporting structure, various functional modules are integrated, and foldable support wheels 5 are provided for easy movement; Deployment process: The electric push rod 55 is folded and extended, which pushes the hinged connecting rod 52 to rotate around the hinge point. The running wheel 54 moves down to contact the ground, and the device is pushed to move to the rear of the vehicle by folding the support wheel 5. According to the shape of the car floor of different cars, a certain number of several adjustment locking slides 18 are selected, and the positions of several adjustment locking slides 18 are adjusted, that is, the locking of several locking screws 16 and the corresponding screw holes 11 at the lower ends are loosened, so that the engaging cavity formed by the lower cover seat 8 and the vertical cross seat 9 can slide freely on the sliding adjustment rod 17, and the locking screw 10 at the lower end is used to stabilize the lower engaging cavity formed by the lower cover seat 8 and the vertical cross seat 9. It can slide freely on the sliding adjustment rod 17 to adjust the horizontal position. After adjusting the horizontal position and aligning it with the target position, several locking screws 16 are locked with the corresponding screw holes 11 at the lower ends, and the adjustment locking slide 18 is fixed by friction. According to the shape of the vehicle floor of different cars, the trailer link 13 is inserted into the upper engaging cavity of the adjustment locking slide 18. The trailer link 13 is stabilized in the upper engaging cavity formed by the upper top seat 15 and the vertical cross seat 9 and slides freely back and forth. The position of the trailer link 13 and the mounting plate 12 is adjusted. The upper and lower locking screws 10 respectively penetrate the locking through hole 14 of the trailer link 13 and the locking through hole 14 of the sliding adjustment rod 17 to facilitate sliding and prevent falling off. Thus, the trailer is connected to the vehicle floor through a plurality of trailer connectors 4, that is, the trailer connecting rod 13 and the mounting plate 12 cooperate to stably connect the vehicle floor; It is connected to the body of the vehicle through a number of auxiliary connecting parts 68, that is, the connecting hook 69 is connected to the body of the vehicle. The base 72 is set at the upper end of the sliding cavity rod 19. The main basket bolt 70 is rotated to adjust the length to ensure the stability of the mounting bracket 1. The length of the inclined basket bolt 73 is adjusted synchronously to form a 45° inclined tension to offset lateral vibration and force balance lock: the double basket bolts are coordinated to adjust to the preset tension value; The exhaust gas collection mechanism 6 is connected to the vehicle exhaust pipe and is responsible for collecting exhaust gas samples from the exhaust pipe. The sealed connecting pipe 66 is used to stably connect the linkage manifold 64 and the dynamic flow controller 65. The soft intake pipe 62 is inserted into the vehicle exhaust pipe and the exhaust gas is transported to the F-type connecting pipe 63 and the linkage manifold 64 through the flexible bellows 61. The exhaust gas enters the dynamic flow controller 65, which monitors the flow rate in real time (0-100L / min) and adjusts the opening through the electric valve to maintain a constant flow rate (according to the requirements of the heating filter 35). Adaptive installation: The flexible bellows 61 is used to compensate for the vibration displacement of the vehicle exhaust pipe (±30mm). The linkage manifold 64 and the dynamic flow controller 65 are both provided with mounting clips 67. The mounting clips 67 are connected to the lower ends of the two sliding cavity rods 19, and the exhaust gas collection mechanism 6 is quickly installed under the mounting support frame 1. Folding process: the electric push rod 55 is retracted → the hinged connecting rod 52 is pulled back to reset, and the running wheel 54 is lifted off the ground → the vehicle is driven to avoid interference with the running wheel 54; During the vehicle operation, the exhaust gas enters the dynamic flow controller 65 through the exhaust gas collecting mechanism 6. The dynamic flow controller 65 monitors the flow in real time and adjusts the opening of the electric valve to maintain a constant flow. The exhaust gas is then injected into the heating filter 35 through the pipeline. The exhaust gas detection module 2 is used to analyze exhaust gas components (such as NOx, CO, HC, CO2, etc.); Intake air pretreatment: exhaust gas enters the heating filter 35 through the installation hole, where it is heated, dehumidified and large particles are filtered (constant temperature of 200°C); Component analysis: The pre-treated gas enters the gas mass spectrometer 32 to detect the concentration of components such as NOx / CO / HC / CO2 in real time; Particle detection: The diverted gas enters the particle detector 39, and the PM2.5 / PM10 concentration is measured using the laser scattering method; Exhaust gas discharge: After detection, the gas is discharged through the air guide pipe 40 → the air outlet connector 41; The exhaust flow assessment mechanism 7 measures exhaust flow, i.e., the detected exhaust gas flows from the outlet connector 41 to the intake pipe 49 and enters the flow evaluator 47. Dynamic measurement utilizes the ultrasonic time difference method to measure flow velocity (0-30 m / s) and flow rate (0-500 L / min) in real time. Data output: The flow signal is transmitted to the system controller 74, which calculates the pollutant mass emission rate (g / s) based on the gas concentration. Gas discharge: After measurement, the exhaust gas flows through the outlet pipe 48 to the external exhaust duct. The quick-disassembly design features two connectors 44 fixed to the lower end of the rear support beam 24, with a fixed clamping plate 46 removably connected to the mounting block 45, allowing tool-free replacement (for maintenance). During vehicle operation, the environmental monitoring unit 3 detects ambient temperature, humidity, air pressure and other parameters for data compensation and correction of exhaust gas detection results. Specifically, the temperature sensor 58 monitors atmospheric temperature, the humidity sensor 59 monitors atmospheric humidity, and the atmospheric pressure sensor 60 monitors atmospheric pressure. The noise sensor monitors driving noise. Data fusion between the noise sensor and the exhaust gas detection module 2 is used to identify the correlation between peaks in particulate matter emissions and specific noise frequencies, assisting in determining abnormal engine combustion or failure of the after-treatment device. The warning light 57 is used to issue an alarm in an emergency, and the battery provides power. The OBD adapter obtains real-time engine data (speed, load, air-fuel ratio, etc.) through the vehicle's OBD interface, aligns it with the exhaust data, and establishes an emission-operating condition correlation model; The wireless communication module (e.g., 4G / 5G) uploads the processed data to a cloud server, generating the following outputs: real-time emission curves (e.g., NOx changes over time); driving cycle emission reports (compliant with RDE testing requirements); and over-the-limit alarms and maintenance recommendations (via app or web push), supporting remote monitoring and management. The system controller 74 coordinates the operation of each module, processes data, and executes the emission analysis algorithm. The system controller 74 executes the following core algorithms: Pollutant emission rate calculation: This combines exhaust component concentration and flow data to calculate the mass emission of pollutants per unit time (g / s or g / km); Dynamic threshold comparison: This determines whether the standards are exceeded according to regulations such as China VI; Fault diagnosis: This identifies problems such as catalytic converter failure and oxygen sensor failure by correlating abnormalities between emission data and OBD parameters; That is, the system controller 74 has a built-in algorithm that complies with RDE regulations, calculates pollutant mass emission values ​​(unit: mg / km) and PN concentration (unit: pieces / km) in real time, and generates a test report that complies with GB 18352.6-2016 or Euro 6 standards; The test report includes an RDE compliance assessment report, a driving behavior scoring report, and a maintenance recommendation report. The RDE compliance assessment report calculates the moving average window (MAW) concentrations of CO, NOx, and PN based on the WLTC or a custom driving cycle; the driving behavior scoring report generates a driver environmental index based on the frequency of sudden acceleration, sudden braking, and speeding events; and the maintenance recommendation report recommends targeted maintenance plans based on emission exceeding standard data and engine fault codes. The vehicle driving data acquisition unit integrates a vehicle speed sensor, a vehicle GPS positioning subunit, a vehicle accelerometer, a vehicle gyroscope, an image recognition subunit and an excessive warning subunit. The vehicle speed sensor, vehicle GPS positioning subunit, vehicle accelerometer and vehicle gyroscope are used to collect vehicle driving speed, geographic location, acceleration, slope and bumpy road condition data in real time, and associate the emission data with vehicle driving speed, acceleration and road condition level (flat / bumpy / climbing) to build a correlation model, and output the pollution emission characteristic curve under different driving behaviors.

[0063] In summary, by installing the carrier frame 1 and cooperating with the position-adjusting locking slide 18 and the position-adjusting locking slide 18 and the trailer connector 4, the left-right position adjustment and the front-back position adjustment of the trailer connector 4 are achieved, and the trailer connector 4 can be matched with the floor of different models of cars, and the installation and use are highly adaptable. By cooperating with a plurality of trailer connectors 4 and a plurality of auxiliary connectors 68, it is ensured that the mounting bracket 1 is more stably mounted and connected to the rear of the inspection vehicle; Integrated architecture: The exhaust gas collection mechanism 6, the exhaust gas detection module 2, the exhaust gas flow evaluation mechanism 7, and the environmental monitoring mechanism 3 are highly integrated on the mounting bracket 1, with a modular architecture design to optimize space.

[0064] By installing the carrier frame 1 and the plurality of retractable support wheels 5, it is easy to move and more convenient to install. At the same time, when the vehicle is driving for inspection, the plurality of retractable support wheels 5 can be retracted off the ground to reduce vibration and walking interference.

[0065] The exhaust gas collection mechanism 6 is connected to the vehicle exhaust pipe, the connection is stable, and the dynamic flow controller 65 can monitor the flow in real time and adjust the opening of the electric valve to maintain a constant flow; The exhaust gas detection module 2 can perform gas composition analysis and particulate matter detection in real time, with stable detection and high efficiency; The environmental monitoring unit 3 monitors atmospheric temperature, humidity, and pressure in real time. Meanwhile, a noise sensor monitors driving noise. Data fusion between the noise sensor and the exhaust gas detection module 2 is used to identify the correlation between peaks in particulate matter emissions and specific noise frequencies, assisting in determining abnormal engine combustion or post-processing device failure. Dynamic measurement of flow velocity and flow rate is achieved through the exhaust gas flow evaluation mechanism 7; The system controller 74 can generate a test report, including an RDE compliance assessment report, a driving behavior score report, and a maintenance recommendation report; and can perform correlation modeling based on vehicle driving data, road type data, etc., and output pollution emission characteristic curves under different driving behaviors.

[0066] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

Claims

1. A portable vehicle emission test system, comprising a mounting bracket (1), a wireless communication module, a cloud server, a system controller (74) and an OBD adapter placed in a vehicle compartment, characterized in that: The lower side of the mounting support frame (1) is provided with a plurality of folding support wheels (5), the front side of the mounting support frame (1) is adjustably provided with a plurality of position adjustment and locking slides (18), the position adjustment and locking slides (18) are detachably provided with a trailer connection member (4), the mounting support frame (1) is provided with an environmental monitoring mechanism (3), the upper front side of the mounting support frame (1) is provided with a plurality of auxiliary connection members (68), the upper rear side of the mounting support frame (1) is provided with an exhaust gas detection module (2), the lower front side of the mounting support frame (1) is provided with an exhaust gas collection mechanism (6), the lower rear side of the mounting support frame (1) is provided with an exhaust gas flow evaluation mechanism (7), and the exhaust gas detection module (2) is connected to the exhaust gas collection mechanism (6) and the exhaust gas flow evaluation mechanism (7) respectively through pipelines.

2. The portable vehicle emission testing system according to claim 1, characterized in that: The mounting support frame (1) includes two left-right symmetrical sliding cavity rods (19), a crossbeam (20) is fixed between the front and rear ends of the two sliding cavity rods (19), and a first hook (21) is fixed at both ends of the crossbeam (20). The interior of the two sliding cavity rods (19) is slidably provided with a sliding insertion rod (23), and the lower ends of the two sliding cavity rods (19) are fixed with a tightening screw seat (22), the tightening screw seat (22) is connected to the sliding cavity rod (19), and the interior of the tightening screw seat (22) is screwed with a tightening stud (30), the upper end of the tightening stud (30) extends into the interior of the sliding cavity rod (19) and contacts the lower end of the sliding insertion rod (23), and the sliding insertion rod (23) is fixed with a tightening screw seat (22). Two bearing beams (24) are fixed to the rear side of the upper end, a plurality of stoppers (31) are fixed to the front end of the front bearing beam (24), a second hook (25) is fixed to both ends of the front bearing beam (24), two left-right symmetrically arranged anti-collision columns (26) and two left-right symmetrically arranged auxiliary taillights (29) are fixed to the rear end of the rear bearing beam (24), a fill light (27) is provided at the rear end and the lower end of the rear bearing beam (24), a license plate frame (28) is fixed to the lower end of the rear bearing beam (24), the license plate frame (28) is located between the two fill lights (27), and a sliding adjustment rod (17) is provided at the front end of the two sliding cavity rods (19).

3. The portable vehicle emission testing system according to claim 2, characterized in that: The adjusting and locking slide (18) comprises a lower cover seat (8), a vertical cross seat (9) and an upper seat (15). The lower end and the upper end of the vertical cross seat (9) are both provided with four screw holes (11) symmetrical in pairs. The lower cover seat (8) is locked to the lower end of the vertical cross seat (9) through a plurality of locking screws (16) and the screw holes (11) corresponding to the lower end. The lower cover seat (8) and the vertical cross seat (9) cooperate to form a lower engaging cavity. The lower engaging cavity engages the slide On the sliding adjustment rod (17), the upper top seat (15) is locked to the upper end of the vertical cross seat (9) through a plurality of locking screws (16) and screw holes (11) corresponding to the upper end. The upper top seat (15) and the vertical cross seat (9) cooperate to form an upper engaging cavity. The upper engaging cavity is vertically arranged with the lower engaging cavity. Locking screws (10) are provided at the upper and lower parts of the vertical cross seat (9). The two locking screws (10) pass through the upper engaging cavity and the lower engaging cavity respectively. The trailer connecting member (4) includes a trailer connecting rod (13), which is inserted into the upper engaging cavity of the adjusting locking slide (18) at the corresponding position. The lower end of the trailer connecting rod (13) is provided with a mounting plate (12). The trailer connecting rod (13) and the sliding adjusting rod (17) are both provided with locking through holes (14). The upper and lower locking screws (10) respectively penetrate the locking through holes (14) of the trailer connecting rod (13) and the locking through holes (14) of the sliding adjusting rod (17).

4. The portable vehicle emission testing system according to claim 3, characterized in that: The exhaust gas detection module (2) includes a chassis (33), which is arranged on two load-bearing beams (24), a flip cover (38) hinged on the front side of the upper end of the chassis (33), and a mounting through hole is provided on the flip cover (38), and side panels (42) are hinged on both sides of the chassis (33), and door locks (34) are provided on the side panels (42), and the door locks (34) are locked on the flip cover (38), and a gas mass spectrometer (32), a heating filter (35), a power distribution box (36), a particulate matter detector (39), an air duct (40) and a plurality of batteries (37) are provided inside the chassis (33), and the heating filter (35) is provided on the heating filter (35). The filter (35) and the power distribution box (36) are arranged at the upper end of the gas mass spectrometer (32), the heating filter (35) is opposite to the installation through hole, the particulate matter detector (39), the air duct (40) and a plurality of batteries (37) are located in front of the gas mass spectrometer (32), and a gas outlet connector (41) is provided on the right side panel (42), and the gas outlet connector (41) is connected to the air duct (40). The heating filter (35), the gas mass spectrometer (32), the particulate matter detector (39) and the air duct (40) are connected in sequence through pipes, and a plurality of waterproof connectors (43) connected thereto are provided on the side of the chassis (33).

5. The portable vehicle emission testing system according to claim 4, characterized in that: The exhaust gas flow rate assessment mechanism (7) includes two connecting seats (44), the two connecting seats (44) are fixed to the lower end of the rear load-bearing beam (24), the lower end of each connecting seat (44) is provided with a mounting block (45), and the mounting block (45) is detachably provided with a fixed clamping plate (46), a flow rate evaluator (47) is provided between the two fixed clamping plates (46), and the left and right ends of the flow rate evaluator (47) are respectively provided with an outlet connecting pipe (48) and an inlet connecting pipe (49), and the inlet connecting pipe (49) is connected to the outlet joint (41) through a pipeline.

6. The portable vehicle emission testing system according to claim 5, characterized in that: The folding support wheel (5) includes a mounting frame (50), the mounting frame (50) is fixed to the lower end of the sliding cavity rod (19), a hinged link 1 (51) is fixed to the lower end of the mounting frame (50), a hinged link 2 (52) is hinged to the lower end of the hinged link 1 (51), a shock-absorbing wheel seat (53) is fixed to the lower end of the hinged link 2 (52), a folding electric push rod (55) is hinged between the shock-absorbing wheel seat (53) and the mounting frame (50), and a plurality of walking wheels (54) are provided at the lower end of the shock-absorbing wheel seat (53).

7. The portable vehicle emission testing system according to claim 6, characterized in that: The exhaust gas collecting mechanism (6) includes an F-type connecting pipe (63), a linkage header (64) connected to both side ends of the F-type connecting pipe (63) through a sealing connecting pipe (66), and a dynamic flow controller (65). The inlet end of the F-type connecting pipe (63) and the inlet end of the linkage header (64) are both connected to a flexible bellows (61), and the flexible bellows (61) are both connected to a soft air intake pipe (62). The F-type connecting pipe (63), the linkage header (64) and the dynamic flow controller (65) are all provided with a mounting clamp (67), and the mounting clamp (67) is connected to the lower ends of the two sliding cavity rods (19). The dynamic flow controller (65) and the heating filter (35) are connected through a pipeline.

8. The portable vehicle emission testing system according to claim 7, characterized in that: The environmental monitoring mechanism (3) includes a mounting chassis (56), the mounting chassis (56) being fixed to one of the sliding cavity rods (19), a warning light (57), a temperature sensor (58), a humidity sensor (59) and an atmospheric pressure sensor (60) being provided on the outside of the mounting chassis (56), a storage battery and a noise sensor being connected via a pipe being provided inside the mounting chassis (56), and a wireless communication module being placed inside the mounting chassis (56).

9. The portable vehicle emission testing system according to claim 8, characterized in that: The auxiliary connecting member (68) includes a main basket bolt (70), an oblique basket bolt (73) is provided on the main basket bolt (70), a connecting hook (69) is provided at the upper end of the main basket bolt (70), a connecting ring (71) is provided at the lower end of the main basket bolt (70) and the lower end of the oblique basket bolt (73), a base (72) is screwed onto the connecting ring (71), and the base (72) is provided at the upper end of the sliding cavity rod (19).

10. The portable vehicle emission testing system according to claim 9, characterized in that: The system controller (74) includes an integrated data acquisition and analysis unit for receiving and processing real-time data from the gas analysis module, the PN analysis module and the flow meter module, and generating a calculation result of the mass of the pollutants discharged; the system controller (74) has a built-in algorithm that complies with the RDE regulations, calculates the mass emission value of the pollutants and the PN concentration in real time, and generates a test report; the test report includes an RDE compliance assessment report, a driving behavior scoring report and a maintenance recommendation report; the RDE compliance assessment report calculates the moving average window concentration of CO, NOx and PN based on the WLTC or a custom driving cycle; the driving behavior scoring report generates a driving behavior score based on the frequency of sudden acceleration, sudden braking and speeding events. Driver environmental protection index; maintenance recommendation report, combining emission exceeding standard data with engine fault code to recommend targeted maintenance plan; system controller (74) includes vehicle driving data acquisition unit, vehicle driving data acquisition unit integrates vehicle speed sensor, vehicle GPS positioning subunit, vehicle accelerometer, vehicle gyroscope, image recognition subunit and exceeding standard warning subunit, vehicle speed sensor, vehicle GPS positioning subunit, vehicle accelerometer and vehicle gyroscope are used to collect vehicle driving speed, geographical location, acceleration, slope and bumpy road condition data in real time, and correlate emission data with vehicle driving speed, acceleration and road condition level to model and output pollution emission characteristic curve under different driving behaviors; The image recognition subunit captures road type and traffic status data in real time through an on-board camera or radar; the system controller (74) connects to the vehicle ECU through an OBD adapter to obtain engine speed, torque, fuel consumption rate and fault code information; and obtains real-time parameters of engine speed and load through the OBD adapter; when the real-time emission value of the excessive warning subunit exceeds a preset threshold, an audible and visual alarm is triggered and the violation time period and corresponding geographical location are recorded.

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