Automobile appearance automatic detection device

Abstract

The invention discloses an automobile appearance automatic detection device, and belongs to the technical field of automobile appearance detection. The device comprises a detection table body, a detection box is arranged at the top of one end of the detection table body, camera portal frames are symmetrically arranged on the two sides in the detection box, top mechanical arm transverse sliding beams are arranged on the inner walls of the camera portal frames, and a plurality of side wing mechanical arm sliding tables are symmetrically arranged at the two ends of the camera portal frames; the top of the other end of the detection bench body is provided with a roof measuring frame and a wing measuring frame side by side. Self-adaptive fitting detection of appearance curved surfaces of different vehicle types is realized, fine concave-convex defects of the vehicle body can be accurately captured by utilizing linkage feedback of the extrusion air pressure amount of the air cavity and dynamic position data of the positioning sensor, and meanwhile, by matching with movement adjustment of the camera portal frame and multi-dimensional movement of the sliding beam and the sliding table of the mechanical arm, the detection precision is improved. The adaptability of detection equipment and vehicle models is greatly improved, and the problems that a traditional device is tedious in adaptation to different vehicle models, and the precision of fine defect detection is insufficient are effectively solved.

Description

Technical Field

[0001] This invention relates to the field of automotive exterior inspection technology, specifically to an automatic automotive exterior inspection device. Background Technology

[0002] Vehicle exterior inspection is one of the core processes in the quality inspection of vehicles after production, used car evaluation, and repair and damage assessment. In the existing technology, vehicle exterior inspection devices are mainly divided into two categories: manual inspection platforms and semi-automatic mechanical inspection systems. Manual inspection relies on the visual observation and experience judgment of inspectors, which has defects such as low inspection efficiency, inconsistent standards, and susceptibility to subjective factors. Semi-automatic mechanical inspection systems mostly use fixed brackets to mount industrial cameras, laser sensors, and other inspection units, and cooperate with the fixed-point movement of robotic arms to complete the exterior scanning.

[0003] In light of the above, it should be noted that: the mechanical structure and motion control logic of such devices are still based on preset trajectory designs, making it difficult to adapt to the differences in the exterior curvature of different car models. Furthermore, the positioning accuracy and motion stability of the mechanical components during the inspection process directly affect the accuracy of the inspection data, failing to meet the needs of large-scale, high-precision automotive exterior inspection. Existing semi-automatic mechanical inspection systems lack a dedicated cleaning mechanism for adhering substances on the car body surface before inspection, making them susceptible to interference from floating objects, dust, and other impurities, as well as fluctuations in external ambient light, leading to distorted inspection data. The coordination of its mechanical components is insufficient, relying mostly on a single fixed trajectory movement, lacking linkage feedback with the pre-inspection structure, and unable to dynamically adjust the inspection path according to the real-time status of the car body. This not only makes it difficult to cover complex curved surfaces and corner areas of the car body but also poses a significant risk of missed inspections, further limiting the reliability and comprehensiveness of the inspection results.

[0004] To address the aforementioned technical shortcomings, a solution is proposed. Summary of the Invention

[0005] The purpose of this invention is to provide an automatic vehicle exterior inspection device to solve the problems mentioned above.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an automatic vehicle exterior inspection device, comprising an inspection platform, an inspection box being provided at the top of one end of the inspection platform, camera gantry frames being symmetrically arranged on both sides inside the inspection box, a top robotic arm transverse slide beam being provided on the inner wall of the camera gantry frames, and several sets of side wing robotic arm slide tables being symmetrically arranged at both ends of the camera gantry frames; a roof measuring frame and a wing measuring frame being arranged side by side at the top of the other end of the inspection platform.

[0007] A measuring beam is slidably mounted between the inner walls of the symmetrically arranged roof measuring frame. An adjusting mechanical arm is slidably mounted on the inner wall of the wing measuring frame. A pushing irregular plate and a limiting bracket are arranged side by side on the adjusting mechanical arm. A measuring software is mounted on both the measuring beam and the limiting bracket. A positioning sensor and an air cylinder rod are installed inside the measuring software.

[0008] Furthermore, a movable section platform is provided at the center of the top of the testing platform, and guide rails are symmetrically provided on the top of both sides of the testing platform, close to the movable section platform, and the guide rails are connected to the camera gantry.

[0009] Furthermore, a bellows is provided on the top of the end of the testing box near the vehicle wing measuring frame, and a high-pressure jet frame is provided on the inner wall of the end of the testing box near the bellows, with the high-pressure jet frame connected to the bellows by pipeline.

[0010] Furthermore, the bottom of the camera gantry is provided with a gantry slide, and the outer walls on both sides of the camera gantry are symmetrically recessed with outer slide grooves that cooperate with the slides of the side wing robotic arms. The inner wall of the camera gantry is recessed with an inner slide groove that cooperates with the transverse slide beam of the top robotic arm.

[0011] Furthermore, the bottom of the roof measuring frame is provided with a limiting base that is fixedly connected to the testing platform, the end face of the measuring beam frame is provided with a slider, the top of the measuring beam frame is provided with a pneumatic box that is connected to the measuring software, and the inner wall of the roof measuring frame is provided with a measuring groove that is connected to the slider.

[0012] Furthermore, the inner wall of the wing measuring frame is recessed with a wing slide groove that cooperates with the adjusting robotic arm, a measuring base is fixedly connected to the detection platform body below the wing measuring frame, and a measuring slide is slidably sleeved with the measuring base at the bottom of the wing measuring frame.

[0013] Furthermore, both the propulsion plate and the limiting bracket have an arc-shaped structure, and the frame of the limiting bracket is provided with an elliptical hole that fits into the measuring software. Part of the measuring software passes through the elliptical hole and is structurally connected to the limiting bracket and the propulsion plate. The inner wall of the adjusting mechanical arm is provided with an inner push rod that is connected to the propulsion plate, and the outer wall of the adjusting mechanical arm is provided with an outer push rod that is connected to the limiting bracket.

[0014] Furthermore, the measuring software has a cavity support inside one end near the detection platform, and the positioning sensor is installed at the bottom of the cavity support. The measuring software has an air passage and an air cavity inside the other end, and the bottom of the measuring software near the air passage and air cavity has an arc-shaped structure.

[0015] Furthermore, several sets of air chambers are arranged vertically in the longitudinal direction, and flexible shelves are provided to connect the air chambers. The air passage is U-shaped and covers the outside of the air chamber. A return air pipe is provided on the outer wall of one end of the air chamber near the air passage. An irregular groove is provided at the top of the outer wall of one end of the air chamber, and an air vent is provided below the irregular groove.

[0016] Furthermore, the air passage is provided with a limiting bracket near the groove and the vent, the air cylinder rod is slidably sleeved between the limiting bracket, and a cylinder plug is provided on the outer wall of the air cylinder rod that is slidably sleeved with the inner wall of the return air pipe, and the cylinder plug is located between the groove and the vent.

[0017] The beneficial effects of this invention are:

[0018] 1. This invention achieves adaptive fitting detection of different vehicle exterior surfaces by using a flexible contact structure of the measuring software in conjunction with the collaborative design of the air cavity and positioning sensor, combined with the sliding adjustment mechanism of the roof measuring frame and the wing measuring frame. By utilizing the linkage feedback between the air pressure squeezed by the air cavity and the dynamic position data of the positioning sensor, it can accurately capture minor dents and bumps on the vehicle body. At the same time, with the movement and adjustment of the camera gantry and the multi-dimensional movement of the robotic arm slide beam and slide table, the adaptability of the detection equipment to the vehicle model is greatly improved, effectively solving the problems of cumbersome adaptation to different vehicle models and insufficient accuracy in detecting minor defects in traditional devices.

[0019] 2. This invention achieves efficient cleaning of vehicle body attachments before inspection by using the linkage of the bellows and high-pressure jet frame. The supplementary lighting system inside the inspection box avoids interference from ambient light sources. At the same time, through the coordinated operation of multiple camera gantry frames, the pre-inspection guidance of the measurement software, and the dynamic trajectory adjustment of the robotic arm, a full-area coverage inspection system is constructed. It can repeatedly screen out and supplement missed inspections in complex parts of the vehicle body, significantly reducing the impact of external interference factors on the inspection results, and solving the problems of attachment interference, ambient light influence, and missed inspections in blind spots that exist in traditional inspection. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the detection box of the present invention;

[0023] Figure 3 This is a schematic diagram of the camera gantry structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the roof-mounted measuring frame of the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the vehicle wing measuring frame of the present invention;

[0026] Figure 6 This is a schematic diagram of the structure of the adjustable robotic arm of the present invention;

[0027] Figure 7 This is a schematic diagram of the overall structure of the measurement software of the present invention;

[0028] Figure 8 This is a schematic diagram of the bottom structure of the measurement software of the present invention.

[0029] Reference numerals: 1. Testing platform; 101. Moving section platform; 102. Guide rail; 2. Testing box; 201. High-pressure jet frame; 3. Roof measuring frame; 301. Measuring beam frame; 302. Slider; 303. Air pressure box; 4. Wing measuring frame; 401. Measuring base; 402. Measuring slide; 404. Propulsion profile plate; 405. Limiting bracket; 406. Adjusting robotic arm; 407. Inner push rod; 408. Outer push rod 5. Bellows; 6. Camera gantry; 601. Gantry slide; 602. Outer slide; 603. Inner slide; 604. Side-wing robotic arm slide; 605. Top robotic arm transverse slide beam; 7. Measurement software; 701. Cavity support; 702. Positioning sensor; 703. Air cavity; 704. Air passage; 705. Flexible shelf; 706. Limiting bracket; 707. Air cylinder rod; 708. Irregular groove; 709. Cylinder plug. Detailed Implementation

[0030] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1: Please refer to Figure 1 - Figure 8As shown, this embodiment is an automatic vehicle appearance inspection device, including an inspection platform 1. An inspection box 2 is set on the top of one end of the inspection platform 1. Camera gantry 6 is symmetrically arranged on both sides inside the inspection box 2. A top robotic arm transverse slide beam 605 is set on the inner wall of the camera gantry 6, and several sets of side wing robotic arm slides 604 are symmetrically arranged at both ends of the camera gantry 6. A roof measuring frame 3 and a wing measuring frame 4 are arranged side by side on the top of the other end of the inspection platform 1. The vehicle waiting for appearance inspection enters the inspection platform 1 at low speed along the end near the roof measuring frame 3 and moves along the moving interval platform 101. According to the type of vehicle waiting for appearance inspection, the operation program of the automatic monitoring device is adjusted in advance to reduce the detection error caused by vehicle type error.

[0032] According to the requirements of appearance inspection, replace the appropriate appearance inspection camera, paint inspection equipment and related inspection equipment in advance, and assemble them on the appropriate CNC robotic arm and the top robotic arm transverse slide beam 605 and the side robotic arm slide table 604, so as to wait for continuous inspection. At the same time, several sets of inspection-adaptive supplementary lights are set on the inner wall of the inspection box 2 to avoid interference from external ambient light sources on the inspection results.

[0033] The top center of the testing platform 1 is provided with a movable section platform 101. Symmetrical guide rails 102 are provided on both sides of the top of the testing platform 1, close to the movable section platform 101, and the guide rails 102 are connected to the camera gantry 6. An air box 5 is provided on the top of the testing box 2 near the vehicle wing measuring frame 4. A high-pressure jet frame 201 is provided on the inner wall of the testing box 2 near the air box 5, and the high-pressure jet frame 201 is connected to the air box 5 via pipeline. When a vehicle enters the testing box 2, the air box 5 guides airflow into the high-pressure jet frame 201 through an air pipe. The high-pressure jet frame 201 is equipped with several sets of high-pressure nozzles. The high-pressure nozzles guide the airflow to clean the vehicle surface of any adhering substances, effectively preventing floating objects from adhering to the vehicle during the waiting period for testing, thus avoiding interference with the vehicle's appearance inspection results.

[0034] The roof measuring frame 3 moves the measuring beam 301 in advance to the preset detection range of the vehicle model via the slider 302. When the vehicle moves close, it adaptively adjusts according to the height of the front hood, roof and rear trunk lid of the vehicle model in conjunction with the driving progress. The measuring beam 301 drives the measuring software 7 to slide down so that the arc-shaped structure at the bottom of the measuring software 7 contacts the vehicle. The air pressure at the compressed air chamber 703 inside the measuring software 7 and the dynamic position data of the positioning sensor 702 from the initial state to the current contact state are recorded and sent to the controller of the automatic detection device. This adjusts the relevant CNC robotic arm on the camera gantry 6 to carry the relevant equipment and perform close-range high-adaptation detection of the vehicle appearance.

[0035] The camera gantry 6 has a gantry slide 601 at its bottom. Symmetrical recesses on the outer walls of both sides of the camera gantry 6 are provided with outer sliding grooves 602 that connect with the side-wing robotic arm slides 604. An inner sliding groove 603 is recessed on the inner wall of the camera gantry 6 that connects with the top robotic arm transverse slide beam 605. The camera gantry 6, through the cooperation of the gantry slide 601 and the guide rail 102, moves to a suitable position inside the inspection box 2 to inspect vehicles. Multiple camera gantry 6s can be used in conjunction to perform repeated screening of vehicles in designated areas and supplementary inspection of missed areas. In this state, the supplementary lighting inside the inspection box 2 is activated according to the external light environment at the current inspection time, ensuring that the inspection environment for each vehicle inside the inspection box 2 remains within a similar movement range, thus avoiding significant errors in the inspection of the vehicle's appearance due to environmental influences.

[0036] Example 2: A measuring beam 301 is laterally slidably installed between the inner walls of a symmetrically arranged roof measuring frame 3. An adjusting mechanical arm 406 is longitudinally slidably installed on the inner wall of a wing measuring frame 4. A pushing irregular plate 404 and a limiting bracket 405 are arranged side by side on the adjusting mechanical arm 406. A measuring software 7 is installed on both the measuring beam 301 and the limiting bracket 405. The measuring software 7 contains a positioning sensor 702 and an air cylinder rod 707. The wing measuring frame 4 uses the cooperation of the measuring base 401 and the measuring slide 402 to drive the pushing irregular plate 404 and the limiting bracket 405 in the initial position. In the initial state, the robot approaches the two wings of the current type of vehicle. Based on the progress of the vehicle traveling on the moving platform 101, it performs secondary fine-tuning of the protruding plate 404 and the limiting bracket 405 by adjusting the inner push rod 407 and the outer push rod 408 on the robotic arm 406. The inner push rod 407 drives the protruding plate 404 to move axially, and the protruding plate 404 drives the measuring software 7 to adjust the length of its extension towards the vehicle along the limiting bracket 405. The outer push rod 408 is used to drive the limiting bracket 405 closer to the vehicle, thereby adjusting the support point of the measuring software 7 after contacting the vehicle to maintain a balanced state.

[0037] After the vehicle obtains relevant external data through the roof measuring frame 3 and the wing measuring frame 4, the controller of the automatic detection device uses this data to adjust the current position of the camera gantry 6 and the CNC robotic arm in advance to change their running trajectory.

[0038] The bottom of the roof measuring frame 3 is provided with a limiting base that is fixedly connected to the test platform 1. The end face of the measuring beam frame 301 is provided with a slider 302. The top of the measuring beam frame 301 is provided with a pressure box 303 that is connected to the measuring software 7. The inner wall of the roof measuring frame 3 is provided with a measuring groove that is connected to the slider 302.

[0039] The inner wall of the wing measuring frame 4 is recessed and has a wing slide groove that is connected to the adjusting robotic arm 406. The wing measuring frame 4 is provided with a measuring base 401 that is fixedly connected to the testing table body 1. The bottom of the wing measuring frame 4 is provided with a measuring slide 402 that is slidably sleeved with the measuring base 401.

[0040] Both the push-propelled irregular plate 404 and the limiting bracket 405 have an arc-shaped structure. The frame of the limiting bracket 405 is provided with an elliptical hole that fits into the measuring software 7. Part of the measuring software 7 passes through the elliptical hole to maintain a structural connection with the limiting bracket 405 and the push-propelled irregular plate 404. The inner wall of the adjusting robotic arm 406 is provided with an inner push rod 407 that is connected to the push-propelled irregular plate 404, and the outer wall of the adjusting robotic arm 406 is provided with an outer push rod 408 that is connected to the limiting bracket 405.

[0041] The measuring software 7 has a cavity support 701 inside one end near the detection stage 1. The positioning sensor 702 is installed at the bottom of the cavity support 701. The measuring software 7 has an air passage 704 and an air cavity 703 inside the other end. The bottom of the measuring software 7 near the air passage 704 and the air cavity 703 has an arc-shaped structure.

[0042] Several sets of air chambers 703 are arranged vertically in the longitudinal direction, and flexible shelves 705 are provided to separate and connect the air chambers 703. The air passage 704 is U-shaped and covers the outside of the air chamber 703. A return air pipe is provided on the outer wall of one end of the air chamber 703 near the air passage 704. An irregular groove 708 is provided at the top of the outer wall of one end of the air chamber 703, and a vent is provided below the irregular groove 708. A limiting bracket 706 is provided inside the air passage 704 near the irregular groove 708 and the vent. The air cylinder rod 707 is slidably sleeved between the limiting bracket 706. A cylinder plug 709 is provided on the outer wall of the air cylinder rod 707 and slidably sleeved with the inner wall of the return air pipe. The cylinder plug 709 is located between the irregular groove 708 and the vent.

[0043] The measuring software 7 initially contacts the vehicle's outer wall through its arc-shaped structure. Due to the counter-force from the contact between the measuring software 7 and the vehicle, the air passage 704 is first compressed. After the air passage 704 collapses, some gas is guided and pushed into the air cylinder rod 707. The air cylinder rod 707 is pushed upwards along the limiting bracket 706 by the gas, causing the cylinder plug 709 to slide upwards synchronously. The cylinder plug 709 slides upwards from its initial state to the interior of the irregular groove 708. The end of the irregular groove 708 near the air chamber 703 maintains a temporary connection between the upper and lower parts of the return air pipe. Therefore, in the current state, the air chamber 703 is connected to the return air pipe and the pressure box 303 through the vent. The pressure box 303 contains a pressure sensor. When the measuring software 7 contacts the vehicle, and the vehicle's exterior... When there is a protrusion, the measuring software 7 is further compressed, increasing the number of air chambers 703 that are compressed and expelled. When there is a dent in the car's exterior, the measuring software 7 reduces contact, decreasing the number of air chambers 703 that are currently in contact and being compressed. Meanwhile, the air pressure sensor inside the air pressure box 303 dynamically generates data records based on the air pressure and communicates them with the controller of the automatic detection device. At the same time, when the measuring software 7 contacts the vehicle and increases the number of air chambers 703 that are compressed, the bottom of the measuring software 7 is simultaneously compressed, causing a positional change. Based on this, the combination of these two factors provides pre-detection control for the camera gantry 6 and allows the measuring software 7 to perform pre-inspection of the vehicle's exterior condition, avoiding damage to the equipment during close-range detection due to abnormalities in the car's exterior.

[0044] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

[0045] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0046] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to any specific implementation. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. An automatic vehicle exterior inspection device, comprising an inspection platform (1), characterized in that, The top of one end of the testing platform (1) is provided with a testing box (2), and the inside of the testing box (2) is symmetrically provided with camera gantry (6) on both sides. The inner wall of the camera gantry (6) is provided with a top robotic arm transverse slide beam (605), and several sets of side wing robotic arm slides (604) are symmetrically provided at both ends of the camera gantry (6). The top of the other end of the testing platform (1) is provided with a roof measuring frame (3) and a wing measuring frame (4) arranged side by side. A measuring beam (301) is slidably arranged between the inner walls of the symmetrically arranged roof measuring frame (3). An adjusting mechanical arm (406) is slidably arranged on the inner wall of the wing measuring frame (4). A pushing irregular plate (404) and a limiting bracket (405) are arranged side by side on the adjusting mechanical arm (406). A measuring software (7) is provided on both the measuring beam (301) and the limiting bracket (405). A positioning sensor (702) and an air cylinder rod (707) are provided inside the measuring software (7).

2. The automatic vehicle exterior inspection device according to claim 1, characterized in that, The top center of the test platform (1) is provided with a movable section platform (101), and the top sides of the test platform (1) are symmetrically provided with guide rails (102) close to the movable section platform (101), and the guide rails (102) are connected to the camera gantry (6).

3. The automatic vehicle exterior inspection device according to claim 1, characterized in that, The top of the test box (2) near the wing measuring frame (4) is provided with a wind box (5), and a high-pressure jet frame (201) is provided on the inner wall of the test box (2) near the wind box (5). The high-pressure jet frame (201) is connected to the wind box (5) by pipeline.

4. The automatic vehicle exterior inspection device according to claim 1, characterized in that, The bottom of the camera gantry (6) is provided with a gantry slide (601), and the outer walls on both sides of the camera gantry (6) are symmetrically recessed with outer slide grooves (602) that cooperate with the slide table (604) of the side wing robotic arm. The inner wall of the camera gantry (6) is recessed with an inner slide groove (603) that cooperates with the transverse slide beam (605) of the top robotic arm.

5. The automatic vehicle exterior inspection device according to claim 1, characterized in that, The bottom of the roof measuring frame (3) is provided with a limiting base that is fixedly connected to the test platform (1). The end face of the measuring beam frame (301) is provided with a slider (302). The top of the measuring beam frame (301) is provided with a pressure box (303) that is connected to the measuring software (7). The inner wall of the roof measuring frame (3) is provided with a measuring groove that is connected to the slider (302).

6. The automatic vehicle exterior inspection device according to claim 1, characterized in that, The inner wall of the wing measuring frame (4) is recessed and connected to the adjusting mechanical arm (406). The wing measuring frame (4) is provided with a measuring base (401) fixedly connected to the detection table body (1) below. The bottom of the wing measuring frame (4) is provided with a measuring slide (402) that is slidably connected to the measuring base (401).

7. The automatic vehicle exterior inspection device according to claim 6, characterized in that, Both the push plate (404) and the limiting bracket (405) have an arc-shaped structure. The frame of the limiting bracket (405) is provided with an elliptical hole that fits into the measuring software (7). Part of the measuring software (7) passes through the elliptical hole and maintains a structural connection with the limiting bracket (405) and the push plate (404). The inner wall of the adjusting mechanical arm (406) is provided with an inner push rod (407) that is connected to the push plate (404). The outer wall of the adjusting mechanical arm (406) is provided with an outer push rod (408) that is connected to the limiting bracket (405).

8. The automatic vehicle exterior inspection device according to claim 1, characterized in that, The measuring software (7) has a cavity support (701) inside one end near the detection platform (1), and the positioning sensor (702) is installed at the bottom of the cavity support (701). The measuring software (7) has an air passage (704) and an air cavity (703) inside the other end. The bottom of the measuring software (7) near the air passage (704) and the air cavity (703) has an arc-shaped structure.

9. The automatic vehicle exterior inspection device according to claim 8, characterized in that, Several sets of air chambers (703) are arranged vertically in the longitudinal direction, and flexible shelves (705) are provided between the air chambers (703) to separate and connect them. The air passage (704) is U-shaped and covers the outside of the air chamber (703). A return air pipe is provided on the outer wall of one end of the air chamber (703) near the air passage (704). A non-standard groove (708) is provided on the top of the outer wall of one end of the air chamber (703), and a vent is provided below the non-standard groove (708).

10. An automatic vehicle exterior inspection device according to claim 9, characterized in that, The air passage (704) is provided with a limiting bracket (706) near the irregular groove (708) and the vent. The air cylinder rod (707) is slidably sleeved between the limiting bracket (706). The outer wall of the air cylinder rod (707) is provided with a cylinder plug (709) that is slidably sleeved with the inner wall of the return air pipe, and the cylinder plug (709) is located between the irregular groove (708) and the vent.

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