Crack detection device for pavement maintenance based on traffic transportation

Abstract

The invention discloses a crack detection device for pavement maintenance based on traffic transportation, and relates to the technical field of visual inspection. Comprising a loading vehicle, a sundry collecting box is installed at the top of the loading vehicle, a road surface cleaning mechanism is arranged at the left end area of a detection area, a visual detection mechanism is arranged at the right end area of the detection area, and the road surface cleaning mechanism comprises first device shells arranged on the two sides of the left end area of the detection area; a rotating rod is fixedly connected to the end, away from the detection area, of the deflection plate, the rotating rod extends into a cavity in the outer side of the first device shell, the surface of the rotating rod is sleeved with a first sleeve, and the middle of a pushing plate is located in a sliding groove and slides in a limited mode. And the detection range can be quickly adapted and adjusted according to the width of the hinged road surface, so that the problem of poor scene adaptability of a traditional device is solved.

Description

A crack detection device for road surface maintenance based on transportation Technical Field

[0001] This invention relates to the field of visual inspection technology, specifically to a crack detection device for road surface maintenance based on transportation. Background Technology

[0002] Over time, asphalt concrete pavements used in transportation may develop potholes, cracks, and surface loosening and peeling. Therefore, regular inspection and maintenance using crack detection devices are necessary. These devices are non-contact inspection equipment based on optical imaging, image processing, and AI algorithms. Their core function is to automatically identify load-bearing and non-load-bearing cracks in asphalt concrete pavements by capturing images of the pavement through a camera, and then output data such as the location, size, and grade of the cracks. This makes them suitable for daily road inspections, periodic surveys, and long-term health monitoring.

[0003] However, existing crack detection mainly relies on traditional manual inspection and conventional inspection equipment. Among them, vehicle-mounted vision inspection technology has gradually replaced manual inspection as the mainstream trend due to its advantages such as high inspection efficiency, non-contact and non-destructive operation, and data traceability. Traditional fixed-point inspection requires frequent vehicle movement and repositioning during the inspection process, which takes a long time and affects the inspection efficiency. At the same time, there may be impurities, gravel, dirt, oil stains and other debris on the road surface, which can easily obscure cracks, leading to missed or false detections.

[0004] To address the aforementioned issues, it is urgent to design a system based on existing crack detection techniques. Summary of the Invention

[0005] The purpose of this invention is to provide a crack detection device for road surface maintenance based on transportation, in order to solve the problems mentioned in the background art, such as the need for frequent vehicle movement and repositioning during the detection process, long detection time, and the easy obstruction of the detection by debris, which leads to missed detection and false detection. The technical solution of this invention provides a solution that is significantly different from the existing technology, which is too simplistic.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a crack detection device for road surface maintenance based on transportation, comprising a loading vehicle, a debris collection box installed on the top of the loading vehicle, a detection area set at the bottom of the loading vehicle, a road surface cleaning mechanism set at the left end of the detection area, and a visual inspection mechanism set at the right end of the detection area;

[0007] The road cleaning mechanism includes a first device housing located on both sides of the left end of the detection area. A negative pressure suction head is fixedly connected to the middle area inside the first device housing. Deflection plates are rotatably connected to both sides of the negative pressure suction head inside the first device housing. A cleaning brush is fixedly connected to the bottom of the deflection plates. A rotating rod is fixedly connected to the end of the deflection plates away from the detection area. The rotating rod extends into the outer cavity of the first device housing. A first sleeve is fitted on the surface of the rotating rod. A connecting plate is fixed between the first sleeves. A push plate is fixedly connected to the middle area of ​​the top of the connecting plate. The push plate extends out of a sliding groove opened on the top of the first device housing and is driven by a first electric push rod installed on the top of the first device housing. The middle part of the push plate is limited to sliding within the sliding groove.

[0008] Preferably, the visual inspection mechanism includes a second device housing located on both sides of the left end of the inspection area. A drive bevel gear is rotatably connected to the top of the outer cavity of the second device housing. The drive bevel gear is driven by a drive motor installed on the top of the second device housing. A driven bevel gear is rotatably connected to one side of the bottom of the drive bevel gear on the inner wall of the outer cavity of the second device housing. A first lead screw is fixedly connected to the output end of the driven bevel gear. The first lead screw extends into the interior of the second device housing and is rotatably connected to the inner wall of the second device housing near the inspection area. A movable block is sleeved on the surface of the first lead screw. The first lead screw and the movable block are threadedly connected. A camera is fixedly connected to the bottom of the movable block. The two sides of the camera are laterally limited and slid within a groove opened on the inner wall of the second device housing by sliders. An adjustment component is installed in the middle area of ​​the inspection area inside the loading vehicle.

[0009] Preferably, the adjustment assembly includes a first adjustment rod fixedly connected to the top of the inner side of the first device housing and the second device housing, a second lead screw rotatably connected inside the loading vehicle, the second lead screw being driven by a drive motor in the right end cavity of the loading vehicle, a drive block being sleeved on the surface of the second lead screw, the second lead screw and the drive block being threadedly connected, the drive block being limited and slidably located in a groove at the bottom of the loading vehicle, a receiving block being fixedly connected to the bottom of the drive block, a second sleeve being laterally limited and slidably located inside the receiving block, and the top of the first adjustment rod being rotatably connected inside the second sleeve.

[0010] Preferably, two sets of drive blocks are sleeved on the surface of the second lead screw, and the two sets of drive blocks are respectively located above the first device housing and the second device housing.

[0011] Preferably, a third sleeve is laterally limited and slidable on both sides of the receiving block within the groove at the bottom of the loading vehicle. A second adjusting rod is fixedly connected to the top of the first device shell and the second device shell at the position corresponding to the third sleeve. The top of the second adjusting rod is rotatably connected within the third sleeve. A second electric push rod is installed on both sides of the loading vehicle at the position corresponding to the third sleeve. The output end of the second electric push rod is fixedly connected to the surface of the third sleeve.

[0012] Preferably, a guide groove is provided on the inner wall of the first sleeve, and a guide rod is fixedly connected to the surface of the rotating rod at the position corresponding to the guide groove. The guide groove is formed into a spiral structure along the inner wall of the first sleeve, and the guide rod is limited and slidable within the guide groove.

[0013] Preferably, the tooth surface of the driving bevel gear meshes with the tooth surface of the driven bevel gear.

[0014] Preferably, the negative pressure suction head is connected to the debris collection box on the top of the loading vehicle via a delivery hose.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. This invention comprises a first device housing, a negative pressure suction head, a deflection plate, a cleaning brush, a rotating rod, a first sleeve, a connecting plate, and a push plate. By activating the first electric push rod at the top of the first device housing, the push plate is pushed to move laterally back and forth along the sliding groove. The push plate drives the connecting plate and the first sleeves on both sides to move synchronously. In conjunction with the guide groove and the guide rod on the surface of the rotating rod, the rotating rod is driven to reciprocate and deflect. In turn, the deflection plate drives the cleaning brush to reciprocate and deflect, cleaning debris or attachments on the road surface. At the same time, the negative pressure suction head in the middle of the first device housing simultaneously sucks the cleaned debris into the debris collection box, avoiding secondary pollution and greatly improving the cleaning effect. It also prevents road debris from obscuring tiny cracks, which could lead to them being misjudged as cracks. The cleaned bridge surface provides a clear image basis for subsequent visual inspection.

[0017] 2. This invention comprises a second device housing, an active bevel gear, a driven bevel gear, a first lead screw moving block, a camera, and an adjustment assembly. A drive motor on the top of the second device housing rotates the active bevel gear, which in turn rotates the driven bevel gear, causing the first lead screw to rotate internally. This causes the camera to move back and forth to scan the road surface, avoiding blind spots caused by fixed-point shooting, increasing the detection range, and adapting to the need for continuous detection of the entire road surface. Sliding blocks on both sides of the camera slide laterally along grooves on the inner wall of the second device housing, ensuring smooth camera movement and a stable shooting angle. Simultaneously, the adjustment assembly allows for flexible adjustment of the tilt angle between the second and first device housings to adapt to different road widths, increasing the camera's scanning range and avoiding frequent vehicle movement for detection. When targeting two-way roads, the device quickly adapts to the coverage of one-way lanes, balancing detection needs with traffic safety, and solving the problem of poor adaptability of traditional devices.

[0018] 3. This invention is equipped with a third sleeve and a second adjusting rod. When the tilt angle of the second device housing and the first device housing is adjusted to match the detection range of the road surface, a visual blind spot will appear in the central area. At this time, the electric push rods on both sides of the transfer vehicle push the third sleeve to move inward to the inside of the transfer vehicle. Then, the second adjusting rod drives the second device housing and the first device housing to move inward as a whole, bringing them closer together, thereby eliminating the visual blind spot of the camera and improving the practicality of the device. Attached Figure Description

[0019] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a schematic plan view of the bottom structure of the loading vehicle of the present invention;

[0021] Figure 3 is a schematic diagram of the internal structure of the first device shell of the present invention;

[0022] Figure 4 is an enlarged schematic diagram of the structure at point A in Figure 3 of this invention;

[0023] Figure 5 is a schematic diagram of the internal structure of the second device housing of the present invention;

[0024] Figure 6 is a front cross-sectional view of the shell structure of the second device of the present invention;

[0025] Figure 7 is an enlarged schematic diagram of the structure at point B in Figure 6 of this invention;

[0026] Figure 8 is a frontal cross-sectional view of the shell structure of the first device of the present invention;

[0027] Figure 9 is a schematic diagram of the rotating rod, the first sleeve, the connecting plate, and the push plate of the present invention.

[0028] In the diagram: 1. Loading vehicle; 2. Waste collection box; 3. Detection area; 41. First device housing; 42. Negative pressure suction head; 43. Deflection plate; 44. Cleaning brush; 45. Rotating rod; 46. First sleeve; 47. Connecting plate; 48. Push plate; 51. Second device housing; 52. Driving bevel gear; 53. Driven bevel gear; 54. First lead screw; 55. Moving block; 56. Camera; 571. First adjusting rod; 573. Second lead screw; 574. Drive block; 575. Receiving block; 576. Second sleeve; 6. Third sleeve; 7. Second adjusting rod; 8. Guide groove; 9. Guide rod. Detailed Implementation

[0029] 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.

[0030] Please refer to Figures 1-9. The present invention provides a technical solution: a crack detection device for road surface maintenance based on transportation, including a loading vehicle 1, a debris collection box 2 installed on the top of the loading vehicle 1, a detection area 3 set at the bottom of the loading vehicle 1, a road surface cleaning mechanism set at the left end of the detection area 3, and a visual detection mechanism set at the right end of the detection area 3.

[0031] The road cleaning mechanism includes a first device housing 41 located on both sides of the left end of the detection area 3. A negative pressure suction head 42 is fixedly connected to the middle area inside the first device housing 41. The negative pressure suction head 42 is connected to the debris collection box 2 on the top of the loading vehicle 1 via a delivery hose. Deflecting plates 43 are rotatably connected to both sides of the negative pressure suction head 42 inside the first device housing 41. A cleaning brush 44 is fixedly connected to the bottom of the deflecting plate 43. A rotating rod 45 is fixedly connected to the end of the deflecting plate 43 away from the detection area 3. The rotating rod 45 extends into the outer cavity of the first device housing 41. A first... A set of sleeves 46, a connecting plate 47 is fixed between the first sleeves 46, a push plate 48 is fixedly connected to the middle area of ​​the top of the connecting plate 47, the push plate 48 extends out of the sliding groove opened on the top of the first device housing 41, and is driven by the first electric push rod installed on the top of the first device housing 41. The middle part of the push plate 48 is located in the sliding groove and is limited to slide. A guide groove 8 is opened on the inner wall of the first sleeve 46, and a guide rod 9 is fixedly connected to the surface of the rotating rod 45 corresponding to the position of the guide groove 8. The guide groove 8 is opened in a spiral structure along the inner wall of the first sleeve 46, and the guide rod 9 is located in the guide groove 8 and is limited to slide.

[0032] The first electric push rod at the top of the first device housing 41 is activated, causing the push plate 48 to move back and forth laterally along the sliding groove. The back and forth movement of the push plate 48 drives the connecting plate 47 and the first sleeves 46 on both sides to move back and forth synchronously. Due to the limited sliding cooperation between the spiral guide groove 8 on the inner wall of the first sleeve 46 and the guide rod 9 on the surface of the rotating rod 45, the back and forth linear movement of the first sleeve 46 is converted into the reciprocating swing of the rotating rod 45. The reciprocating swing of the rotating rod 45 drives the deflection plate 43 to swing, which in turn drives the cleaning brush 44 to swing and clean the ground, collecting sand, cement residue and other debris on the bridge surface to the center. At the same time, the negative pressure suction head 42 is activated to suck the collected debris into the debris collection box 2 on the top of the loading vehicle 1 through the conveying hose.

[0033] As one embodiment of the present invention, the visual inspection mechanism includes a second device housing 51 located on both sides of the left end area of ​​the inspection area 3. An active bevel gear 52 is rotatably connected to the top of the outer cavity of the second device housing 51. The active bevel gear 52 is driven by a drive motor installed on the top of the second device housing 51. A driven bevel gear 53 is rotatably connected to one side of the bottom end of the active bevel gear 52 on the inner wall of the outer cavity of the second device housing 51. The tooth surfaces of the active bevel gear 52 and the tooth surfaces of the driven bevel gear 53 mesh with each other. A first lead screw 54 is fixedly connected to the output end of the driven bevel gear 53. The first lead screw 54 extends into the interior of the second device housing 51 and is rotatably connected to the inner wall of the second device housing 51 near the inspection area 3. A moving block 55 is sleeved on the surface of the first lead screw 54. The first lead screw 54 and the moving block 55 are threadedly connected. A camera 56 is fixedly connected to the bottom of the moving block 55. The two sides of the camera 56 are laterally limited and slid in the grooves opened on the inner wall of the second device housing 51 by sliders. An adjustment component is installed in the middle area of ​​the inspection area 3 located in the loading vehicle 1.

[0034] The drive motor at the top of the second device housing 51 drives the active bevel gear 52 to rotate. Since the active bevel gear 52 meshes with the driven bevel gear 53, it drives the driven bevel gear 53 to rotate. The rotation of the driven bevel gear 53 drives the first lead screw 54 to rotate inside the second device housing 51. The rotation drives the moving block 55 to move axially along the first lead screw 54. The movement of the moving block 55 drives the camera 56 to slide laterally along the slide groove on the inner wall of the second device housing 51 through the slider, ensuring that the camera 56 moves smoothly and scans and detects the road surface.

[0035] In one embodiment of the present invention, the adjustment assembly includes a first adjustment rod 571 fixedly connected to the top of the inner side of the first device housing 41 and the second device housing 51, a second lead screw 573 rotatably connected inside the loading vehicle 1, the second lead screw 573 being driven by a drive motor in the right end cavity of the loading vehicle 1, a drive block 574 sleeved on the surface of the second lead screw 573, the second lead screw 573 and the drive block 574 being threadedly connected, the drive block 574 being limited and slidably located in the bottom groove of the loading vehicle 1, a receiving block 575 fixedly connected to the bottom of the drive block 574, a second sleeve 576 being laterally limited and slidably located inside the receiving block 575, the top of the first adjustment rod 571 being rotatably connected inside the second sleeve 576, and two sets of drive blocks 574 being sleeved on the surface of the second lead screw 573, the two sets of drive blocks 574 being located above the first device housing 41 and the second device housing 51 respectively;

[0036] The second lead screw 573 is driven to rotate by the drive motor in the right end chamber of the loading vehicle 1. The rotation of the second lead screw 573 drives two sets of drive blocks 574 to move synchronously along the axis of the second lead screw 573. The synchronous movement of the drive blocks 574 drives the bottom receiving block 575 to move accordingly. The movement of the receiving block 575 drives the second sleeve 576 to move. Through the rotational cooperation between the first adjusting rod 571 and the second sleeve 576, the first device shell 41 and the second device shell 51 on both sides are tilted synchronously.

[0037] As one embodiment of the present invention, the accommodating block 575 is laterally limited and slidably fitted with a third sleeve 6 on both sides of the bottom groove of the loading vehicle 1. The top of the first device shell 41 and the second device shell 51 are fixedly connected to the third sleeve 6. The top of the second adjusting rod 7 is rotatably connected inside the third sleeve 6. The two sides of the loading vehicle 1 are fitted with a second electric push rod corresponding to the third sleeve 6. The output end of the second electric push rod is fixedly connected to the surface of the third sleeve 6.

[0038] By rotating the second adjusting rod 7 in conjunction with the third sleeve 6, the second adjusting rod 7 drives the second device housing 51 and the first device housing 41 to move inward synchronously and move closer to each other, adapting to the road width while eliminating the visual blind spot that appears in the middle area of ​​the bottom of the loading vehicle 1 during the adjustment process.

[0039] Working principle: First, the loader 1 is driven to the starting point of the road surface inspection. The inspection width is determined according to the road surface type, such as a narrow bridge or a two-way road. The drive motor in the right end chamber of the loader 1 drives the second lead screw 573 to rotate. The rotation of the second lead screw 573 drives two sets of drive blocks 574 to move synchronously along the axis of the second lead screw 573. The synchronous movement of the drive blocks 574 drives the bottom receiving block 575 to move accordingly. The movement of the receiving block 575 drives the second sleeve 576 to move. Through the rotational cooperation between the first adjusting rod 571 and the second sleeve 576, the first loading rods on both sides are moved. The first device shell 41 and the second device shell 51 tilt synchronously with the third sleeve 6 as the rotation point, changing the coverage of the first device shell 41 and the second device shell 51. At the same time, the second electric push rods on both sides of the loading vehicle 1 are activated, pushing the third sleeve 6 to slide laterally along the groove at the bottom of the loading vehicle 1. Through the rotational cooperation of the second adjusting rod 7 and the third sleeve 6, the second adjusting rod 7 drives the second device shell 51 and the first device shell 41 to move inward synchronously and move closer to each other, adapting to the road width while eliminating the visual blind spot in the middle area of ​​the bottom of the loading vehicle 1 during the adjustment process.

[0040] After the detection range is adjusted, the first electric push rod at the top of the first device housing 41 is activated, causing the push plate 48 to move back and forth laterally along the sliding groove. The back and forth movement of the push plate 48 drives the connecting plate 47 and the first sleeves 46 on both sides to move back and forth synchronously. Due to the limited sliding cooperation between the spiral guide groove 8 on the inner wall of the first sleeve 46 and the guide rod 9 on the surface of the rotating rod 45, the back and forth linear movement of the first sleeve 46 is converted into the reciprocating swing of the rotating rod 45. The reciprocating swing of the rotating rod 45 drives the deflection plate 43 to swing, which in turn drives the cleaning brush 44 to swing and clean the ground, collecting sand, cement residue and other debris on the bridge surface towards the center. At the same time, the negative pressure suction head 42 is activated to pass through... Negative pressure suction draws the collected debris into the debris collection box 2 on top of the loader 1 via a conveying hose, completing the bridge deck pretreatment. Then, the drive motor on top of the second device housing 51 is activated to drive the active bevel gear 52 to rotate. Since the active bevel gear 52 meshes with the driven bevel gear 53, it drives the driven bevel gear 53 to rotate. The rotation of the driven bevel gear 53 drives the first lead screw 54 to rotate inside the second device housing 51. The rotation drives the moving block 55 to move axially along the first lead screw 54. The movement of the moving block 55 drives the camera 56 to slide laterally along the slide groove on the inner wall of the second device housing 51 via a slider, ensuring that the camera 56 moves smoothly and scans and detects the road surface.

[0041] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A crack detection device for road surface maintenance based on transportation, comprising a loading vehicle (1), characterized in that: The loading vehicle (1) is equipped with a debris collection box (2) on top and a detection area (3) at the bottom. A road cleaning mechanism is provided at the left end of the detection area (3) and a visual inspection mechanism is provided at the right end of the detection area (3). The road cleaning mechanism includes a first device housing (41) located on both sides of the left end of the detection area (3). A negative pressure suction head (42) is fixedly connected to the middle area inside the first device housing (41). A deflection plate (43) is rotatably connected to both sides of the negative pressure suction head (42) inside the first device housing (41). A cleaning brush (44) is fixedly connected to the bottom of the deflection plate (43). The deflection plate (43) is fixedly connected to a rotating rod (45) at one end away from the detection area (3). The rotating rod (45) extends into the outer cavity of the first device housing (41). A first sleeve (46) is sleeved on the surface of the rotating rod (45). A connecting plate (47) is fixed between the first sleeves (46). A push plate (48) is fixedly connected to the middle area of ​​the top of the connecting plate (47). The push plate (48) extends out of the sliding groove opened on the top of the first device housing (41) and is driven by a first electric push rod installed on the top of the first device housing (41). The middle part of the push plate (48) is located in the sliding groove and is limited to sliding.

2. The crack detection device for road surface maintenance based on transportation as described in claim 1, characterized in that: The visual inspection mechanism includes a second device housing (51) located on both sides of the left end of the inspection area (3). A drive bevel gear (52) is rotatably connected to the top of the outer cavity of the second device housing (51). The drive bevel gear (52) is driven by a drive motor mounted on the top of the second device housing (51). A driven bevel gear (53) is rotatably connected to one side of the bottom of the drive bevel gear (52) on the inner wall of the outer cavity of the second device housing (51). A first lead screw (54) is fixedly connected to the output end of the driven bevel gear (53). 4) Extends into the interior of the second device housing (51) and is rotatably connected to the inner wall of the second device housing (51) near the detection area (3). A moving block (55) is sleeved on the surface of the first lead screw (54). The first lead screw (54) and the moving block (55) are threadedly connected. A camera (56) is fixedly connected to the bottom of the moving block (55). The camera (56) is laterally limited and slid in the groove opened on the inner wall of the second device housing (51) by the slider on both sides. An adjustment component is installed in the middle area of ​​the detection area (3) inside the loading vehicle (1).

3. The crack detection device for road surface maintenance based on transportation as described in claim 2, characterized in that: The adjustment assembly includes a first adjustment rod (571) fixedly connected to the top of the inner side of the first device housing (41) and the second device housing (51). A second lead screw (573) is rotatably connected inside the loading vehicle (1). The second lead screw (573) is driven by a drive motor in the right end chamber of the loading vehicle (1). A drive block (574) is sleeved on the surface of the second lead screw (573). The second lead screw (573) and the drive block (574) are threadedly connected. The drive block (574) is located in the bottom groove of the loading vehicle (1) and is limited to slide. A receiving block (575) is fixedly connected to the bottom of the drive block (574). A second sleeve (576) is laterally limited to slide inside the receiving block (575). The top of the first adjustment rod (571) is rotatably connected inside the second sleeve (576).

4. A crack detection device for road surface maintenance based on transportation, as described in claim 3, characterized in that: The drive block (574) is mounted on the surface of the second lead screw (573) in two sets, and the two sets of drive blocks (574) are respectively located above the first device housing (41) and the second device housing (51).

5. A crack detection device for road surface maintenance based on transportation, as described in claim 3, characterized in that: The accommodating block (575) has a third sleeve (6) that slides laterally within the groove at the bottom of the loading vehicle (1) on both sides. The top of the first device shell (41) and the second device shell (51) are fixedly connected to the third sleeve (6) at their respective positions. The top of the second adjusting rod (7) is rotatably connected within the third sleeve (6). The loading vehicle (1) has a second electric push rod installed on both sides at their respective positions corresponding to the third sleeve (6). The output end of the second electric push rod is fixedly connected to the surface of the third sleeve (6).

6. A crack detection device for road surface maintenance based on transportation, as described in claim 1, characterized in that: The inner wall of the first sleeve (46) is provided with a guide groove (8), and the rotating rod (45) is fixedly connected with a guide rod (9) at the position corresponding to the guide groove (8). The guide groove (8) is opened in a spiral structure along the inner wall of the first sleeve (46), and the guide rod (9) is located in the guide groove (8) and is limited to sliding.

7. A crack detection device for road surface maintenance based on transportation, as described in claim 2, characterized in that: The tooth surface of the driving bevel gear (52) meshes with the tooth surface of the driven bevel gear (53).

8. A crack detection device for road surface maintenance based on transportation, as described in claim 1, characterized in that: The negative pressure suction head (42) is connected to the debris collection box (2) on the top of the loading vehicle (1) via a delivery hose.

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