Airfield pavement crack image recognition method and system

Abstract

The invention relates to the technical field of crack recognition, in particular to an airfield pavement crack image recognition method and system, and the system comprises a mounting frame, a rotating unit, a plurality of cameras and a plurality of crack detection assemblies. The crack detection assembly comprises a plurality of first springs, a rebounding block, a ground contact wheel and a first pressure sensor, the mounting frame is provided with a first sliding groove, and when the mounting frame passes through a crack, the ground contact wheel is driven by the first springs to downwards enter the crack; when the ground contact wheel moves downwards, the rebounding block is driven to move downwards in the first sliding groove, the rebounding block makes contact with the first pressure sensor, the pressure value of the first pressure sensor changes, and it shows that a crack exists at the position. The rotating unit is started to drive the camera to rotate and adjust the shooting range, so that cracks of an airport road are detected in a mode that the ground is in contact with the wheels, then image shooting processing is carried out on the detected cracks through the camera, and useless image information shot by the camera is greatly reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of crack identification, and particularly to a method and system for identifying airport pavement crack images. Background Art

[0002] The flatness of airport pavement is crucial for the safety of airplanes. Especially when cracks appear on the airport pavement, making the airport road surface uneven, it will cause bumps and instability during the takeoff and landing of airplanes. It is difficult for the airplane tires to maintain stable contact when passing through, thus increasing the risk of airplane damage and accidents. Therefore, it is necessary to regularly detect cracks on the airport pavement. Currently, an adjustable camera is installed on a driving trolley, and the camera is adjusted at multiple angles and the airport pavement is photographed, so as to process and analyze the graphics, and finally judge whether there are cracks on the airport pavement. Then the staff will go to repair the cracks.

[0003] In the prior art, traditional crack identification methods all use cameras to take pictures and do not have the function of physical detection. However, there will inevitably be leaves, shadows or dirt on airport roads. These areas will be photographed and calculated during shooting, which increases the burden of subsequent graphic processing and affects the accuracy and efficiency of final crack image identification. Summary of the Invention

[0004] The purpose of the present invention is to provide a method and system for identifying airport pavement crack images, so as to solve the problems in the prior art that traditional crack identification methods all use cameras to take pictures and do not have the function of physical detection. However, there will inevitably be leaves, shadows or dirt on airport roads. These areas will be photographed and calculated during shooting, which increases the burden of subsequent graphic processing and affects the accuracy and efficiency of final crack image identification.

[0005] To achieve the above purpose, the present invention provides an airport pavement crack image identification system, including a mounting frame, a rotating unit, a plurality of cameras and a plurality of crack detection components. The rotating unit is arranged on the mounting frame, and the plurality of cameras are sequentially arranged on the rotating unit;

[0006] The crack detection component includes a plurality of first springs, a return block, a ground contact wheel and a first pressure sensor. The mounting frame has a first sliding groove, the return block is slidably connected to the first sliding groove, the ground contact wheel is arranged below the return block, the plurality of first springs are sequentially arranged above the return block, and the first pressure sensor is arranged on the side of the return block away from the first springs.

[0007] Among them, the crack detection component further includes a support frame, a sliding plate, an inclined block, and a plurality of inclined surface wheels. The support frame is fixedly connected to the mounting frame and is located above the mounting frame. The sliding plate is slidably connected to the first chute. The sliding plate is fixedly connected to the elastic return block and is located below the elastic return block. The inclined block is fixedly connected to the sliding plate and is located below the sliding plate. The plurality of inclined surface wheels are symmetrically arranged on both sides of the inclined block. The ground contact wheel is arranged below the inclined block.

[0008] Among them, the rotation unit includes a rotating plate, a rotating component, and two LED lights. The rotating plate is rotatably connected to the mounting frame. The rotating component is arranged on one side of the mounting frame. The output end of the rotating component penetrates through the mounting frame and is fixedly connected to the rotating plate. The two LED lights are both fixedly connected to the lower part of the mounting frame and are sequentially distributed on both sides of the rotating plate.

[0009] Among them, the airport pavement crack image recognition system further includes a crack confirmation component. The crack confirmation component is arranged on the mounting frame and is located on one side of the crack detection component.

[0010] Among them, the crack confirmation component includes a plurality of infrared recognition sensors, two moving components, a moving housing, a lifting unit, a lifting housing, two detection plates, a detection plate transverse movement unit, a plurality of second pressure sensors, and a plurality of protective pads. The mounting frame has a second chute. The plurality of infrared recognition sensors are sequentially arranged below the mounting frame and are located on one side of the second chute. The two moving components are symmetrically arranged inside the second chute. The moving housing is arranged at the output ends of the two moving components. The lifting unit is arranged inside the moving housing. The lifting housing is arranged on the lifting unit. The detection plate transverse movement unit is arranged on the lifting unit housing. The two detection plates are symmetrically arranged on the detection plate transverse movement unit. The second pressure sensors are arranged below the lifting housing, on one side and below the detection plates. A protective pad is arranged on one side of each second pressure sensor.

[0011] Among them, the lifting unit includes a lifting component, a gear, a rack, and a slider. The moving housing has a third chute. The lifting component is arranged on one side of the moving housing. The output end of the lifting component penetrates through the moving housing and is fixedly connected to the gear. The gear meshes with the rack. The slider is slidably connected to the chute. The slider is arranged on one side of the rack.

[0012] Among them, the detection plate transverse movement unit includes a transverse movement component, a connection block, two screw rods, and two threaded blocks. The lifting housing is arranged below the rack. The connection block is arranged inside the lifting housing. The two screw rods are symmetrically arranged at both ends of the connection block, and the other ends of the two screw rods are rotatably connected to the lifting housing. The transverse movement component is arranged on one side of the lifting housing, and the output end of the transverse movement component is fixedly connected to the corresponding screw rod. The two threaded blocks are respectively adapted to the corresponding screw rods, and the two detection plates are respectively arranged below the corresponding threaded blocks.

[0013] Among them, the crack confirmation component further includes a limiting unit, and the limiting unit is arranged inside the moving housing;

[0014] The limiting unit includes a groove body, two electromagnets, a clamping block, a clamping groove, and two second springs. The groove body is arranged on the inner side wall of the moving housing. The two electromagnets are respectively arranged on the inner wall of the groove body and the clamping block. The two ends of the two second springs are respectively movably connected to the groove body and the clamping block, and the two second springs are respectively arranged on both sides of the two electromagnets.

[0015] The present invention also provides an airport pavement crack image recognition method, which adopts the above-mentioned airport pavement crack image recognition system, and includes the following steps:

[0016] Install the mounting rack below the driving trolley;

[0017] The driving trolley moves on the airport road, and at the same time, the ground contact wheel continuously contacts and abuts against the ground;

[0018] When passing through a crack, the ground contact wheel will be driven by the first spring and move downward into the crack;

[0019] When the ground contact wheel moves downward, it drives the rebound block to move downward. The rebound block contacts the first pressure sensor, and the first pressure sensor has a change in pressure value, indicating that there is a crack here;

[0020] After the driving trolley moves and adjusts, aim the camera at the crack for shooting;

[0021] The rotation unit is started to drive the camera to rotate and adjust the shooting range.

[0022] An airport pavement crack image recognition method and system of the present invention install the mounting frame below the driving cart; the driving cart moves on the airport road, and at the same time the ground contact wheel continuously contacts and abuts against the ground; when passing through a crack, the ground contact wheel will be driven by the first spring and move downward into the crack; when the ground contact wheel moves downward, it drives the spring-back block to move downward in the first chute, and the spring-back block contacts the first pressure sensor, and the first pressure sensor has a change in pressure value, indicating that there is a crack here; after the driving cart moves and adjusts, the camera is aligned with the crack for shooting; the rotating unit is started to drive the camera to rotate and adjust the shooting range. Through the above structural settings, the crack position of the airport road can be detected first by the ground contact wheel, and then the detected crack is subjected to image shooting and processing by the camera, thereby greatly reducing the useless image information captured by the camera and improving the subsequent crack image processing efficiency and accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art.

[0024] Figure 1 It is a schematic structural diagram of the whole of the present invention.

[0025] Figure 2 It is a top view of the whole of the present invention.

[0026] Figure 3 It is of the present invention Figure 2 A-A line cross-sectional view.

[0027] Figure 4 It is of the present invention Figure 3 Local enlarged view at B.

[0028] Figure 5 It is of the present invention Figure 3 Local enlarged view at C.

[0029] Figure 6 It is of the present invention Figure 3 Local enlarged view at D.

[0030] Figure 7 It is a step flow chart of the airport pavement crack image recognition method of the present invention.

[0031] 1 - Mounting frame, 2 - Camera, 3 - First spring, 4 - Rebound block, 5 - Ground contact wheel, 6 - First pressure sensor, 7 - First chute, 8 - Support frame, 9 - Slide plate, 10 - Inclined block, 11 - Inclined plane wheel, 12 - Rotating plate, 13 - Rotating component, 14 - LED lamp, 15 - Infrared recognition sensor, 16 - Moving component, 17 - Moving housing, 18 - Lifting housing, 19 - Detection plate, 20 - Second pressure sensor, 21 - Protection pad, 22 - Second chute, 23 - Lifting component, 24 - Gear, 25 - Rack, 26 - Slide block, 27 - Third chute, 28 - Transverse movement component, 29 - Connecting block, 30 - Screw, 31 - Threaded block, 32 - Groove body, 33 - Electromagnet, 34 - Clamping block, 35 - Card slot, 36 - Second spring. Detailed implementation manner

[0032] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as a limitation to the present invention.

[0033] Please refer to Figures 1 to 6 , the present invention provides an airport pavement crack image recognition system, including a mounting frame 1, a rotating unit, a plurality of cameras 2 and a plurality of crack detection components. The crack detection components include a plurality of first springs 3, a rebound block 4, a ground contact wheel 5 and a first pressure sensor 6. The mounting frame 1 has a first chute 7. The crack detection components further include a support frame 8, a slide plate 9, an inclined block 10 and a plurality of inclined plane wheels 11. The rotating unit includes a rotating plate 12, a rotating component 13 and two LED lamps 14. The airport pavement crack image recognition system further includes a crack confirmation component. The crack confirmation component includes a plurality of infrared recognition sensors 15, two moving components 16, a moving housing 17, a lifting unit, a lifting housing 18, two detection plates 19, a detection plate 19 transverse movement unit, a plurality of second pressure sensors 20 and a plurality of protection pads 21. The mounting frame 1 has a second chute 22. The lifting unit includes a lifting component 23, a gear 24, a rack 25 and a slide block 26. The moving housing 17 has a third chute 27. The detection plate 19 transverse movement unit includes a transverse movement component 28, a connecting block 29, two screws 30 and two threaded blocks 31. The crack confirmation component further includes a limiting unit. The limiting unit includes a groove body 32, two electromagnets 33, a clamping block 34, a card slot 35 and two second springs 36.

[0034] Among them, the rotating unit is arranged on the mounting frame 1, and a plurality of the cameras 2 are sequentially arranged on the rotating unit. The mounting frame 1 has a first sliding groove 7, the spring-back block 4 is slidably connected to the first sliding groove 7, the ground contact wheel 5 is arranged below the spring-back block 4, a plurality of the first springs 3 are sequentially arranged above the spring-back block 4, and the first pressure sensor 6 is arranged on one side of the spring-back block 4 away from the first spring 3. The mounting frame 1 is installed below the driving trolley; the driving trolley moves on the airport road, and at the same time, the ground contact wheel 5 continuously contacts and abuts against the ground; when passing through a crack, the ground contact wheel 5 will be driven by the first spring 3 and move downward into the crack; when the ground contact wheel 5 moves downward, it drives the spring-back block 4 to move downward in the first sliding groove 7, and the spring-back block 4 contacts the first pressure sensor 6, and the first pressure sensor 6 has a change in pressure value, indicating that there is a crack here; after the driving trolley moves and adjusts, the camera 2 is aligned with the crack for shooting; the rotating unit is started to drive the camera 2 to rotate and adjust the shooting range.

[0035] Secondly, the support frame 8 is fixedly connected to the mounting frame 1 and is located above the mounting frame 1. The sliding plate 9 is slidably connected to the first sliding groove 7, the sliding plate 9 is fixedly connected to the spring-back block 4 and is located below the spring-back block 4. The inclined block 10 is fixedly connected to the sliding plate 9 and is located below the inclined block 10. A plurality of the inclined surface wheels 11 are symmetrically arranged on both sides of the inclined block 10, and the ground contact wheel 5 is arranged below the inclined block 10. The support frame 8 bears the spring-back block 4 and supports the first spring 3. When the spring-back block 4 rebounds, it drives the slider 26 to slide in the first sliding groove 7 and pushes the inclined block 10 to move downward, so that the ground contact wheel 5 enters the crack. When the ground contact wheel 5 needs to be removed, the driving trolley continues to move. At this time, the inclined surface wheels 11 on the inclined block 10 contact the edge of the crack, so that the inclined block 10 and the slider 26 rebound and contract, so that the ground contact wheel 5 is removed from the crack; the driving trolley can be any device capable of moving, and only need to install the mounting frame 1 below the driving trolley to perform crack detection.

[0036] At the same time, the rotating plate 12 is rotatably connected to the mounting frame 1, the rotating component 13 is arranged on one side of the mounting frame 1, the output end of the rotating component 13 penetrates through the mounting frame 1 and is fixedly connected to the rotating plate 12. The two LED lights 14 are both fixedly connected to the lower part of the mounting frame 1 and are sequentially distributed on both sides of the rotating plate 12. The rotating component 13 is a self-locking motor. When the rotating component 13 is started, it drives the rotating plate 12 to rotate, so that a plurality of the cameras 2 rotate to adjust the shooting angle, and at the same time, the LED lights 14 supplement light for the shooting position.

[0037] In addition, the crack confirmation component is arranged on the mounting frame 1 and is located on one side of the crack detection component. The mounting frame 1 has a second sliding groove 22. A plurality of the infrared identification sensors 15 are sequentially arranged below the mounting frame 1 and are located on one side of the second sliding groove 22. Two of the moving components 16 are symmetrically arranged inside the second sliding groove 22. The moving housing 17 is arranged at the output ends of the two moving components 16. The lifting unit is arranged inside the moving housing 17. The lifting housing 18 is arranged on the lifting unit. The detection plate 19 transverse movement unit is arranged on the lifting unit housing. Two of the detection plates 19 are symmetrically arranged on the detection plate 19 transverse movement unit. The second pressure sensors 20 are arranged below the lifting housing 18, on one side and below the detection plate 19. A protective pad 21 is arranged on one side of each of the second pressure sensors 20. The moving component 16 is an electronic slide rail. After detecting a crack, the driving trolley continues to move forward. Then, when the infrared identification sensor 15 detects the crack area, it stops. At this time, the moving component 16 is started to drive the moving housing 17 to be located above the crack. At this time, the lifting unit is started to drive the lifting housing 18 to move downwards, so that the two detection plates 19 are inserted into the crack and abut against the inner bottom wall of the crack. At the same time, the corresponding second pressure sensors 20 have a numerical change, indicating that the detection plates 19 have reached the bottom of the crack. Then the detection plate 19 transverse movement unit is started to drive the two detection plates 19 to move in opposite directions. Then, when the corresponding second pressure sensors 20 contact the inner side wall of the crack and the pressure value changes, it indicates that they have reached the inner side wall of the crack. In addition, if the second pressure sensor 20 below the lifting housing 18 contacts the ground outside the crack, it indicates that the detection plates 19 have all extended into the crack, but the bottom of the crack is still not seen. And the length of the detection plate 19 is 5 cm. Therefore, it indicates that the depth of the crack exceeds 5 cm. If the detection plates 19 are inserted and abutted against the inner bottom wall of the crack, the staff measures the inserted part to know the depth of the crack. The maximum distance of the transverse movement of the detection plate 19 is 2 cm. After the sides and the bottom of the detection plate 19 are abutted, the staff measures the depth and width data of the crack and compares them with the image captured by the subsequent camera 2, so as to improve the accuracy of crack identification. At the same time, the protective pad 21 protects the second pressure sensors 20 from damage.

[0038] Then, the moving housing 17 has a third chute 27. The lifting member 23 is disposed on one side of the moving housing 17. The output end of the lifting member 23 penetrates the moving housing 17 and is fixedly connected to the gear 24. The gear 24 meshes with the rack 25. The slider 26 is slidably connected to the chute. The slider 26 is disposed on one side of the rack 25. The lifting member 23 is a self-locking motor. When the lifting member 23 is started, it drives the gear 24 to rotate, cooperates with the rack 25, drives the lifting housing 18 to move downward, adjusts the height of the detection plate 19, and inserts it into the crack. At the same time, the slider 26 slides in the third chute 27 to improve the stability of the rack 25.

[0039] Again, the lifting housing 18 is disposed below the rack 25. The connecting block 29 is disposed inside the lifting housing 18. Two screw rods 30 are symmetrically disposed at both ends of the connecting block 29. The other ends of the two screw rods 30 are rotatably connected to the lifting housing 18. The lateral movement member 28 is disposed on one side of the lifting housing 18. The output end of the lateral movement member 28 is fixedly connected to the corresponding screw rod 30. Two threaded blocks 31 are respectively adapted to the corresponding screw rods 30. Two detection plates 19 are respectively disposed below the corresponding threaded blocks 31. The lateral movement member 28 is a self-locking motor. When the lateral movement member 28 is started, through the action of the connecting block 29, it drives the two screw rods 30 to rotate, cooperates with the threaded blocks 31, drives the detection plates 19 to move relatively or oppositely, so as to abut against the inner wall of the crack, and then measures the moving distance to obtain the crack width. Furthermore, the width data is compared with the image data captured by the subsequent camera 2, so as to optimize the image and improve the image quality and accuracy.

[0040] Moreover, the limiting unit is arranged inside the moving housing 17; the groove body 32 is arranged on the inner side wall of the moving housing 17, two electromagnetic magnets 33 are respectively arranged on the inner wall of the groove body 32 and the clamping block 34, both ends of the two second springs 36 are respectively movably connected to the groove body 32 and the clamping block 34, and the two second springs 36 are respectively arranged on both sides of the two electromagnetic magnets 33. The groove body 32 bears the clamping block 34. After detecting the depth and width of the crack, the detection plate 19 moves upward, and the lifting housing 18 enters the moving housing 17 for storage. At this time, the card slot 35 contacts the inclined surface below the clamping block 34, thereby pushing the clamping block 34 to contract. Then the second spring 36 rebounds, driving the clamping block 34 to be stuck into the card slot 35, completing the limit locking of the lifting housing 18, preventing it from sliding down, reducing the pressure on the self-locking motor. When it is necessary to release the limit, the two electromagnetic magnets 33 are energized to attract each other, driving the clamping block 34 to disengage from the card slot 35, so as to move the lifting housing 18 up and down.

[0041] When using an airport pavement crack image recognition system according to this embodiment, the mounting frame 1 is installed below the driving trolley; the driving trolley moves on the airport road, and at the same time the ground contact wheel 5 continuously contacts and abuts against the ground; when passing through a crack, the ground contact wheel 5 will be driven by the first spring 3 and move downward into the crack; when the ground contact wheel 5 moves downward, it drives the rebound block 4 to move downward in the first chute 7, and the rebound block 4 contacts the first pressure sensor 6, and the first pressure sensor 6 has a change in pressure value, indicating that there is a crack here; after the driving trolley moves and adjusts, the camera 2 is aimed at the crack for shooting; the rotating unit is started to drive the camera 2 to rotate and adjust the shooting range; through the above structural settings, the position of the crack on the airport road can be detected first by the ground contact wheel 5, and then the detected crack is subjected to image shooting and processing by the camera 2, thereby greatly reducing the useless image information captured by the camera 2 and improving the subsequent crack image processing efficiency and accuracy.

[0042] Please refer to Figure 7 , the present invention also provides an airport pavement crack image recognition method, including the following steps:

[0043] S1: Install the mounting frame 1 below the driving trolley;

[0044] S2: The driving trolley moves on the airport road, and at the same time the ground contact wheel 5 continuously contacts and abuts against the ground;

[0045] S3: When passing through a crack, the ground contact wheel 5 will be driven by the first spring 3 and move downward into the crack;

[0046] S4: When the ground contact wheel 5 moves downward, it drives the rebound block 4 to move downward. The rebound block 4 contacts the first pressure sensor 6, and the first pressure sensor 6 undergoes a change in pressure value, indicating that there is a crack here.

[0047] S5: After the driving cart is moved and adjusted, the camera 2 is aligned with the crack for shooting.

[0048] S6: The rotation unit is activated to drive the camera 2 to rotate and adjust the shooting range.

[0049] Among them, the mounting bracket 1 is installed below the driving cart; the driving cart moves on the airport road, and at the same time, the ground contact wheel 5 continuously contacts and abuts against the ground; when passing through a crack, the ground contact wheel 5 will be driven by the first spring 3 and move downward into the crack; when the ground contact wheel 5 moves downward, it drives the rebound block 4 to move downward. The rebound block 4 contacts the first pressure sensor 6, and the first pressure sensor 6 undergoes a change in pressure value, indicating that there is a crack here; after the driving cart is moved and adjusted, the camera 2 is aligned with the crack for shooting; the rotation unit is activated to drive the camera 2 to rotate and adjust the shooting range.

[0050] What is disclosed above is only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. An airport pavement crack image recognition system, comprising a mounting frame, a rotating unit and a plurality of cameras, wherein the rotating unit is arranged on the mounting frame, and the plurality of cameras are arranged on the rotating unit in sequence, characterized in that: Also included are multiple crack detection components; The crack detection assembly includes a plurality of first springs, a rebound block, a ground contact wheel and a first pressure sensor, the mounting frame has a first slide groove, the rebound block is slidably connected to the first slide groove, the ground contact wheel is arranged below the rebound block, a plurality of the first springs are arranged in sequence above the rebound block, and the first pressure sensor is arranged on a side of the rebound block away from the first spring.

2. The airport pavement crack image recognition system according to claim 1, characterized in that: The crack detection assembly also includes a support frame, a slide plate, an inclined block and a plurality of inclined wheels. The support frame is fixedly connected to the mounting frame and is located above the mounting frame. The slide plate is slidably connected to the first slide groove. The slide plate is fixedly connected to the rebound block and is located below the rebound block. The inclined block is fixedly connected to the slide plate and is located below the inclined block. The plurality of inclined wheels are symmetrically arranged on both sides of the inclined block, and the ground contact wheel is arranged below the inclined block.

3. The airport pavement crack image recognition system according to claim 2, characterized in that: The rotating unit includes a rotating plate, a rotating component and two LED lamps. The rotating plate is rotatably connected to the mounting frame. The rotating component is arranged on one side of the mounting frame. The output end of the rotating component passes through the mounting frame and is fixedly connected to the rotating plate. The two LED lamps are fixedly connected to the bottom of the mounting frame and are distributed on both sides of the rotating plate in sequence.

4. The airport pavement crack image recognition system according to claim 3, characterized in that: The airport pavement crack image recognition system also includes a crack confirmation component, which is arranged on the mounting frame and located on one side of the crack detection component.

5. The airport pavement crack image recognition system according to claim 4, characterized in that: The crack confirmation component includes multiple infrared recognition sensors, two moving parts, a moving shell, a lifting unit, a lifting shell, two detection plates, a detection plate transverse movement unit, multiple second pressure sensors and multiple protection pads. The mounting frame has a second slide groove. The multiple infrared recognition sensors are sequentially arranged below the mounting frame and are located on one side of the second slide groove. The two moving parts are symmetrically arranged inside the second slide groove. The moving shell is arranged at the output ends of the two moving parts. The lifting unit is arranged inside the moving shell. The lifting shell is arranged on the lifting unit. The detection plate transverse movement unit is arranged on the lifting single shell. The two detection plates are symmetrically arranged on the detection plate transverse movement unit. The second pressure sensors are arranged below the lifting shell, on one side and below the detection plate, and the protection pad is arranged on one side of each second pressure sensor.

6. The airport pavement crack image recognition system according to claim 5, characterized in that: The lifting unit includes a lifting component, a gear, a rack and a slider. The mobile shell has a third slide groove. The lifting component is arranged on one side of the mobile shell. The output end of the lifting component passes through the mobile shell and is fixedly connected to the gear. The gear and the rack are meshed with each other. The slider is slidably connected to the slide groove. The slider is arranged on one side of the rack.

7. The airport pavement crack image recognition system according to claim 6, characterized in that: The detection plate transverse movement unit includes a transverse movement component, a connecting block, two screws and two threaded blocks. The lifting shell is arranged below the rack, the connecting block is arranged inside the lifting shell, the two screws are symmetrically arranged at both ends of the connecting block, and the other ends of the two screws are rotatably connected to the lifting shell. The transverse movement component is arranged on one side of the lifting shell, and the output end of the transverse movement component is fixedly connected to the corresponding screw. The two threaded blocks are respectively adapted to the corresponding screws, and the two detection plates are respectively arranged below the corresponding threaded blocks.

8. The airport pavement crack image recognition system according to claim 7, characterized in that: The crack confirmation assembly further includes a limiting unit, and the limiting unit is arranged inside the movable housing; The limiting unit includes a slot body, two electromagnets, a block, a slot and two second springs. The slot body is arranged on the inner wall of the movable shell, and the two electromagnets are respectively arranged on the inner wall of the slot body and the block. Both ends of the two second springs are respectively movably connected to the slot body and the block, and the two second springs are respectively arranged on both sides of the two electromagnets.

9. A method for recognizing crack images on an airport pavement, using the airport pavement crack image recognition system as claimed in claim 8, characterized in that: The steps include: Install the mounting frame below the driving trolley; The trolley is driven to move on the airport road, while the ground contact wheels are continuously in contact with the ground; When passing through a crack, the ground contact wheel will be driven by the first spring and go downward into the crack; When the ground contact wheel moves downward, the rebound block is driven to move downward, and the rebound block contacts the first pressure sensor, and the pressure value of the first pressure sensor changes, indicating that a crack exists there; After the driving trolley is moved and adjusted, the camera is aimed at the crack to take pictures; The rotating unit is started to drive the camera to rotate and adjust the shooting range.

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