Disease monitoring device for bridge crossing expressway

Abstract

The utility model aims to provide the highway crossing bridge disease monitoring device capable of performing large-span visual scanning monitoring on the bottom surface of a bridge floor monitoring bridge. The bridge monitoring device comprises a movable base, a rotary supporting seat rotationally connected to the movable base and used for adjusting the angle, a telescopic assembly rotationally connected with the rotary supporting seat and used for adjusting the monitoring height, and a monitoring assembly rotationally connected with the movable end of the telescopic assembly and used for bridge monitoring. The movable end of the rotary supporting base is rotationally connected with a telescopic adjusting device, a rotary transmission frame used for adjusting the opening angle is connected between the rotary supporting base and the telescopic assembly, and the movable end of the telescopic adjusting device is matched with the middle of the rotary transmission frame in a pushing mode. The highway bridge disease monitoring device is applied to the technical field of highway bridge disease monitoring devices.

Description

Technical Field

[0001] This utility model relates to the technical field of highway bridge defect monitoring devices, and in particular to a defect monitoring device for a bridge crossing a highway. Background Technology

[0002] Overloaded transport vehicles not only damage highway subgrades and bridge structures, but also pose a significant threat to people's lives and property. A major challenge arising from the rapid development of road traffic safety is how to effectively and safely manage overloaded vehicles.

[0003] Bridge health monitoring technology, as an important part of bridge engineering technology, plays a vital role in ensuring the safe passage of bridges. The occurrence and development of cracks on the bridge underside are significant indicators of bridge health problems; therefore, monitoring these cracks is a major component of bridge health monitoring. Traditionally, monitoring personnel manually observed the bridge underside using telescopes. However, this method is largely abandoned due to the considerable distance between the personnel and the bridge underside, slow monitoring speed, and poor reliability. Currently, the commonly used method involves using a monitoring vehicle equipped with a support platform that extends under the bridge. The monitoring vehicle travels across the bridge, allowing monitoring personnel to conduct close-range visual observation from the platform. This method requires significant manpower, and the personnel performing the monitoring work need to have a certain level of experience. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a bridge defect monitoring device that can perform large-span visual scanning monitoring of the bridge deck and the bridge bottom surface.

[0005] The technical solution adopted by this utility model is as follows: This utility model includes a movable base, a rotating support seat rotatably connected to the movable base for adjusting the angle, a telescopic component rotatably connected to the rotating support seat for adjusting the monitoring height, and a monitoring component rotatably connected to the movable end of the telescopic component for bridge monitoring. The movable end of the rotating support seat is rotatably connected to a telescopic adjustment device. A rotating transmission frame for adjusting the opening angle is connected between the rotating support seat and the telescopic component. The movable end of the telescopic adjustment device is pushed and engaged with the middle part of the rotating transmission frame.

[0006] Furthermore, the rotating support base includes a turntable, two hydraulic push rods rotatably connected to the front side of the turntable, a support rod rotatably connected to the middle of the turntable, and a counterweight block slidably engaged with the rear side of the turntable. The movable end of each hydraulic push rod is rotatably connected to the corresponding side of the support rod. The movable end of the support rod forms a connecting lug rotatably connected to the telescopic assembly. The lower end of the support rod forms a rotating block rotatably connected to the telescopic adjustment device. The end of the support rod near the connecting lug is provided with a first protruding rod connected to the rotating transmission frame.

[0007] Furthermore, a slot is formed in the middle of the turntable, and a first lug is provided in the middle of the slot, which is rotatably connected to the support rod. A second lug is provided on the front side of the slot, which is rotatably connected to the corresponding hydraulic push rod. Two guide rods are provided on the rear side of the slot, which are slidably engaged with the counterweight.

[0008] Furthermore, the telescopic assembly includes a fixed rod, a telescopic rod, a telescopic drive device, and an angle adjustment device. One end of the fixed rod is rotatably connected to the movable end of the rotating support base. A sliding cavity is formed inside the telescopic rod, and the telescopic rod is slidably connected to the sliding cavity. The fixed end of the telescopic drive device is rotatably connected to the sliding cavity, and the movable end of the telescopic drive device is rotatably connected to the inner wall of the telescopic rod. An adjustment block is formed at one end of the telescopic rod, and the angle adjustment device is fixedly connected to the adjustment block. The monitoring component is rotatably connected to the adjustment block, and the movable end of the angle adjustment device drives the monitoring component to rotate and adjust the angle. The fixed rod is provided with a second protruding rod rotatably connected to the rotating transmission frame.

[0009] Furthermore, the monitoring component includes a rotating arm rotatably connected to the telescopic component, a first sliding member slidably engaged with the rotating arm for visual monitoring, and a second sliding member slidably engaged with the first sliding member for monitoring the far end of the bridge. One end of the rotating arm is rotatably connected to a rotating shaft that is in transmission engagement with the telescopic component. The front end of the first sliding member is provided with a plurality of first monitoring cameras and a plurality of first supplementary lights, and the front end of the second sliding member is provided with a plurality of second monitoring cameras and a plurality of second supplementary lights.

[0010] Furthermore, the rotating arm is provided with a connecting ear plate that is rotatably connected to the rotating shaft, and the inner walls of the rotating arm are formed with first sliding grooves on both sides for the first sliding member to cooperate with. A first displacement device is provided on one side of the rotating arm, and the front and rear ends of the rotating arm are rotatably connected with first adjusting wheels. The first displacement device is driven to cooperate with one of the first adjusting wheels, and a first transmission belt for driving the first sliding member to move back and forth is wound between the two first adjusting wheels.

[0011] Furthermore, the outer walls on both sides of the first sliding member are provided with first sliders that slide in cooperation with the rotating arm, the inner walls of the first sliding member are formed with second sliding grooves for the second sliding member to cooperate with, a second displacement device is provided on one side of the first sliding member, and second adjusting wheels are rotatably connected to both ends of the first sliding member. The second displacement device is in drive cooperation with one of the second adjusting wheels, and a second transmission belt for driving the second sliding member to move back and forth is wound between the two second adjusting wheels. A first mounting plate is provided on one side of the first sliding member for fixing and connecting a plurality of first monitoring cameras and a plurality of first supplementary lights.

[0012] Furthermore, a second mounting plate is provided on one side of the second sliding member for fixing a plurality of the second monitoring cameras and a plurality of the second supplementary lights.

[0013] Furthermore, the rotary transmission frame includes a first connecting plate, a second connecting plate, and a connecting shaft. One end of the first connecting plate is rotatably connected to the movable end of the rotary support base, one end of the second connecting plate is rotatably connected to the telescopic assembly, the connecting shaft is rotatably connected to the other ends of the first and second connecting plates, and the middle part of the connecting shaft is rotatably connected to the movable end of the telescopic adjustment device.

[0014] Furthermore, the movable base includes a movable seat, a drive wheel disposed at the bottom of the movable seat, a rotating boss disposed on one side of the movable seat and rotatably cooperating with the rotating support seat, and a support frame disposed in the middle of the movable seat for supporting the rotating support seat.

[0015] The beneficial effects of this utility model are as follows: Because this utility model uses a telescopic adjustment device for pushing and retracting strokes, and coordinates with a rotating transmission frame to control the angle between the rotating support and the telescopic component, the opening and retraction of the telescopic component is achieved, making opening and retraction convenient. The monitoring component, through a multi-stage transmission structure, works with multiple monitoring cameras and multiple supplementary lights to photograph and record the bottom of the bridge, enabling visual monitoring of the bridge's health condition across large spans. Laser rangefinders for monitoring distance are installed at both ends of the first and second sliding members. The telescopic component, in conjunction with the laser rangefinders, can be adjusted to the appropriate height for measurement, achieving optimal photographic monitoring efficiency. Attached Figure Description

[0016] Figure 1 This is a first structural schematic diagram of the present invention;

[0017] Figure 2 This is a second structural schematic diagram of the present invention;

[0018] Figure 3 This is an exploded view of the rotary support base of this utility model;

[0019] Figure 4 yes Figure 3 A magnified view of part A in the middle;

[0020] Figure 5 This is a schematic diagram of the structure of the rotary transmission frame of this utility model;

[0021] Figure 6 This is an exploded view of the telescopic component of this utility model;

[0022] Figure 7 This is a cross-sectional view of the telescopic component of this utility model;

[0023] Figure 8 This is a schematic diagram of the structure of the monitoring component of this utility model;

[0024] Figure 9 yes Figure 8 A magnified view of part B in the middle section;

[0025] Figure 10 This is a schematic diagram of the structure of the rotating arm of this utility model;

[0026] Figure 11 yes Figure 10 A magnified view of part C in the middle;

[0027] Figure 12 This is a structural schematic diagram of the first sliding member of this utility model;

[0028] Figure 13 yes Figure 12 A magnified view of part D in the middle;

[0029] Figure 14 This is a structural schematic diagram of the mobile base of this utility model.

[0030] In the diagram: 1. Movable base; 11. Movable seat; 12. Rotating boss; 13. Support frame; 14. Drive wheel; 2. Rotating support seat; 21. Turntable; 211. Slot; 212. First ear piece; 213. Second ear piece; 214. Guide rod; 22. Hydraulic push rod; 23. Support rod; 24. Counterweight; 25. Connecting ear piece; 26. Rotating block; 27. First protruding rod; 3. Telescopic assembly; 31. Fixed rod; 32. Telescopic rod; 33. Telescopic drive device; 34. Angle adjustment device; 35. Sliding cavity; 36. Adjusting block; 37. Second protruding rod; 4. Monitoring assembly; 41. Rotating arm; 411. Connecting... 412. Ear plate; 413. First slide groove; 414. First displacement device; 415. First adjusting wheel; 416. First transmission belt; 42. First sliding member; 421. First slider; 422. Second slide groove; 423. Second displacement device; 424. Second adjusting wheel; 425. Second transmission belt; 426. First mounting plate; 43. Second sliding member; 44. Rotating shaft; 45. First monitoring camera; 46. First supplementary light; 47. Second monitoring camera; 48. Second supplementary light; 5. Telescopic adjustment device; 6. Rotary transmission frame; 61. First connecting plate; 62. Second connecting plate; 63. Connecting shaft; 7. Laser rangefinder. Detailed Implementation

[0031] like Figures 1 to 14 As shown, in this embodiment, the present invention includes a movable base 1, a rotating support 2 rotatably connected to the movable base 1 for adjusting the angle, a telescopic component 3 rotatably connected to the rotating support 2 for adjusting the monitoring height, and a monitoring component 4 rotatably connected to the movable end of the telescopic component 3 for bridge monitoring. The movable end of the rotating support 2 is rotatably connected to a telescopic adjustment device 5. A rotating transmission frame 6 for adjusting the opening angle is connected between the rotating support 2 and the telescopic component 3. The movable end of the telescopic adjustment device 5 is pushed and engaged with the middle part of the rotating transmission frame 6.

[0032] The movable base 1 moves on the bridge deck. The rotating support 2 controls the direction of the telescopic component 3 and the monitoring component 4 by rotating left and right. The telescopic adjustment device 5 is a hydraulic telescopic push rod that pushes and retracts. It works in conjunction with the rotating transmission frame 6 to control the angle between the rotating support 2 and the telescopic component 3, realizing the opening and retraction of the telescopic component 3. The opening and retraction are convenient. The monitoring component 4, through a multi-stage transmission structure, works with multiple monitoring cameras and multiple supplementary lights to take pictures and record the bottom of the bridge, realizing visual monitoring of the bridge's health condition by crossing the bottom of the bridge over a long span. Laser rangefinders 7 for monitoring distance are set at both ends of the first sliding member 42 and the second sliding member 43. The telescopic component 3, in conjunction with the laser rangefinders 7, can be adjusted to the corresponding height for measurement to achieve the optimal picture monitoring effect.

[0033] In this embodiment, the rotating support base 2 includes a turntable 21, two hydraulic push rods 22 rotatably connected to the front side of the turntable 21, a support rod 23 rotatably connected to the middle of the turntable 21, and a counterweight block 24 slidably engaged with the rear side of the turntable 21. The movable end of each hydraulic push rod 22 is rotatably connected to the corresponding side of the support rod 23. The movable end of the support rod 23 forms a connecting lug 25 rotatably connected to the telescopic assembly 3. The lower end of the support rod 23 forms a rotating block 26 rotatably connected to the telescopic adjustment device 5. The end of the support rod 23 near the connecting lug 25 is provided with a first protruding rod 27 connected to the rotating transmission frame 6.

[0034] The hydraulic push rod 22 is a hydraulic telescopic rod 32. The turntable 21 works with the rotating boss 12 of the movable base 1 to control and adjust the rotational displacement angle of the telescopic component 3 and the monitoring component 4. The counterweight 24 is set to balance and stabilize the force, effectively avoiding the situation where the center of gravity shifts and causes the object to tip over during the photo inspection process.

[0035] In this embodiment, a slot 211 is formed in the middle of the turntable 21, and a first lug 212 rotatably connected to the support rod 23 is provided in the middle of the slot 211. A second lug 213 rotatably connected to the corresponding hydraulic push rod 22 is provided on the front side of the slot 211, and two guide rods 214 slidably engaged with the counterweight block 24 are provided on the rear side of the slot 211.

[0036] In this embodiment, the telescopic assembly 3 includes a fixed rod 31, a telescopic rod 32, a telescopic drive device 33, and an angle adjustment device 34. One end of the fixed rod 31 is rotatably connected to the movable end of the rotating support 2. A sliding cavity 35 is formed inside the telescopic rod 32, and the telescopic rod 32 is slidably connected to the sliding cavity 35. The fixed end of the telescopic drive device 33 is rotatably connected to the sliding cavity 35, and the movable end of the telescopic drive device 33 is rotatably connected to the inner wall of the telescopic rod 32. An adjustment block 36 is formed at one end of the telescopic rod 32, and the angle adjustment device 34 is fixedly connected to the adjustment block 36. The monitoring assembly 4 is rotatably connected to the adjustment block 36, and the movable end of the angle adjustment device 34 drives the monitoring assembly 4 to rotate and adjust the angle. The fixed rod 31 is provided with a second protruding rod 37 rotatably connected to the rotating transmission frame 6. The telescopic drive device 33 is a hydraulic telescopic rod 32, and the angle adjustment device 34 is a rotary motor that cooperates with the rotating shaft 44 to rotate and adjust the angle between the monitoring assembly 4 and the telescopic rod 32.

[0037] In this embodiment, the monitoring component 4 includes a rotating arm 41 rotatably connected to the telescopic component 3, a first sliding member 42 slidably engaged with the rotating arm 41 for visual monitoring, and a second sliding member 43 slidably engaged with the first sliding member 42 for monitoring the far end of the bridge. One end of the rotating arm 41 is rotatably connected to a rotating shaft 44 that is in transmission engagement with the telescopic component 3. The front end of the first sliding member 42 is provided with a plurality of first monitoring cameras 45 and a plurality of first supplementary lights 46, and the front end of the second sliding member 43 is provided with a plurality of second monitoring cameras 47 and a plurality of second supplementary lights 48. Using a sequential sliding and telescopic transmission method, the first sliding member 42 and the second sliding member 43 extend in a stepped manner to cross the bottom of the bridge for photographic monitoring operations.

[0038] In this embodiment, the rotating arm 41 is provided with a connecting lug 411 rotatably connected to the rotating shaft 44. First sliding grooves 412 for the first sliding member 42 to engage are formed on both sides of the inner wall of the rotating arm 41. A first displacement device 413 is provided on one side of the rotating arm 41. First adjusting wheels 414 are rotatably connected to both the front and rear ends of the rotating arm 41. The first displacement device 413 is in transmission engagement with one of the first adjusting wheels 414. A first transmission belt 415 for driving the first sliding member 42 to move back and forth is wound between the two first adjusting wheels 414. The first displacement device 413 is a rotary motor, and the first transmission belt 415 is a belt.

[0039] In this embodiment, the outer walls of both sides of the first sliding member 42 are provided with first sliders 421 that slide in cooperation with the rotating arm 41. The inner walls of the first sliding member 42 have second grooves 422 formed on both sides for the second sliding member 43 to cooperate with. A second displacement device 423 is provided on one side of the first sliding member 42. Second adjusting wheels 424 are rotatably connected to both ends of the first sliding member 42. The second displacement device 423 is in transmission cooperation with one of the second adjusting wheels 424. A second transmission belt 425 for driving the second sliding member 43 to move back and forth is wound between the two second adjusting wheels 424. A first mounting plate 426 is provided on one side of the first sliding member 42 for fixedly connecting a plurality of first monitoring cameras 45 and a plurality of first supplementary lights 46. The second displacement device 423 is a rotary motor, and the second transmission belt 425 is a belt.

[0040] In this embodiment, a second mounting plate 431 is provided on one side of the second sliding member 43 for fixing a plurality of second monitoring cameras 47 and a plurality of second supplementary lights 48.

[0041] In this embodiment, the rotary transmission frame 6 includes a first connecting plate 61, a second connecting plate 62, and a connecting shaft 63. One end of the first connecting plate 61 is rotatably connected to the movable end of the rotary support 2. One end of the second connecting plate 62 is rotatably connected to the telescopic assembly 3. The connecting shaft 63 is rotatably connected to the other end of the first connecting plate 61 and the other end of the second connecting plate 62. The middle part of the connecting shaft 63 is rotatably connected to the movable end of the telescopic adjustment device 5.

[0042] In this embodiment, the movable base 1 includes a movable seat 11, a drive wheel (14) disposed at the bottom of the movable seat 11, a rotating boss 12 disposed on one side of the movable seat 11 and rotatably engaged with the rotating support seat 2, and a support frame 13 disposed in the middle of the movable seat 11 to support the rotating support seat 2. The rotating boss 12 is a rotating motor cooperating with a rotating table 21 to drive the rotating support seat 2 to rotate. The upper end of the support frame 13 is provided with a placement platform supported by a telescopic component 3. A shock-absorbing airbag is disposed between the drive wheel 14 and the movable seat 11 to reduce vibration. The drive wheel 14 is driven to rotate by a motor and gears.

[0043] The working principle of this utility model:

[0044] After the mobile base 1 moves to the working position via the drive wheel 14 and stops, the rotating boss 12 drives the rotating support 2 to rotate at a certain angle, so that the telescopic component 3 is perpendicular to the monitoring component 4 and the edge of the bridge deck. The hydraulic push rod 22 of the rotating support 2 extends out, the support rod 23 moves upward, and the telescopic adjustment device 5 extends out to apply a thrust to the connecting shaft 63 in the middle of the rotating transmission frame 6, increasing the angle between the support rod 23 and the telescopic component 3 until the telescopic component 3 and the support rod 23 form a right angle. At this time, the hydraulic push rod 22 retracts, making the upper surface of the support rod 23 parallel to the horizontal plane, and the telescopic frame perpendicular to the horizontal plane. Then, according to the height of the bottom of the bridge, the telescopic drive device 33 pushes the telescopic rod 32 to extend until the monitoring height is reached.

[0045] After reaching the monitoring height, the angle adjustment device 34 drives the monitoring component 4 to rotate and open until it is parallel to the bridge ground. Then, according to the width of the bridge, the first sliding member 42 and the second sliding member 43 extend, and multiple first monitoring phases and multiple second monitoring cameras 47 take pictures of the bridge ground to monitor its health. Multiple first supplementary lights 46 and second supplementary lights 48 provide illumination to improve the accuracy of the picture monitoring.

[0046] Although the embodiments of this utility model are described with reference to actual solutions, they do not constitute a limitation on the meaning of this utility model. For those skilled in the art, modifications to the implementation schemes and combinations with other schemes based on this specification are obvious.

Claims

1. A device for monitoring bridge defects across a highway, characterized in that: The system includes a movable base (1), a rotating support (2) rotatably connected to the movable base (1) for adjusting the angle, a telescopic assembly (3) rotatably connected to the rotating support (2) for adjusting the monitoring height, and a monitoring assembly (4) rotatably connected to the movable end of the telescopic assembly (3) for bridge monitoring. The movable end of the rotating support (2) is rotatably connected to a telescopic adjustment device (5). A rotating transmission frame (6) for adjusting the opening angle is connected between the rotating support (2) and the telescopic assembly (3). The movable end of the telescopic adjustment device (5) is pushed and engaged with the middle of the rotating transmission frame (6).

2. The bridge defect monitoring device for crossing a highway as described in claim 1, characterized in that: The rotating support base (2) includes a turntable (21), two hydraulic push rods (22) rotatably connected to the front side of the turntable (21), a support rod (23) rotatably connected to the middle of the turntable (21), and a counterweight (24) slidably engaged with the rear side of the turntable (21). The movable end of each hydraulic push rod (22) is rotatably connected to the corresponding side of the support rod (23). The movable end of the support rod (23) is formed with a connecting lug (25) rotatably connected to the telescopic assembly (3). The lower end of the support rod (23) is formed with a rotating block (26) rotatably connected to the telescopic adjustment device (5). The end of the support rod (23) near the connecting lug (25) is provided with a first protrusion (27) connected to the rotating transmission frame (6).

3. The bridge defect monitoring device for crossing a highway as described in claim 2, characterized in that: The turntable (21) has a slot (211) in the middle. A first lug (212) is provided in the middle of the slot (211) and is rotatably connected to the support rod (23). A second lug (213) is provided on the front side of the slot (211) and is rotatably connected to the corresponding hydraulic push rod (22). Two guide rods (214) are provided on the rear side of the slot (211) and are slidably engaged with the counterweight (24).

4. The device for monitoring bridge defects across a highway according to claim 1, characterized in that: The telescopic assembly (3) includes a fixed rod (31), a telescopic rod (32), a telescopic drive device (33), and an angle adjustment device (34). One end of the fixed rod (31) is rotatably connected to the movable end of the rotating support base (2). A sliding cavity (35) is formed inside the telescopic rod (32), and the telescopic rod (32) is slidably connected to the sliding cavity (35). The fixed end of the telescopic drive device (33) is rotatably connected to the sliding cavity (35), and the movable end of the telescopic drive device (33) is rotatably connected to the inner wall of the telescopic rod (32). An adjustment block (36) is formed at one end of the telescopic rod (32), and the angle adjustment device (34) is fixedly connected to the adjustment block (36). The monitoring component (4) is rotatably connected to the adjustment block (36), and the movable end of the angle adjustment device (34) drives the monitoring component (4) to rotate and adjust the angle. The fixed rod (31) is provided with a second protruding rod (37) rotatably connected to the rotating transmission frame (6).

5. The bridge defect monitoring device for crossing a highway as described in claim 1, characterized in that: The monitoring component (4) includes a rotating arm (41) rotatably connected to the telescopic component (3), a first sliding member (42) slidably engaged with the rotating arm (41) for visual monitoring, and a second sliding member (43) slidably engaged with the first sliding member (42) for monitoring the far end of the bridge. One end of the rotating arm (41) is rotatably connected to a rotating shaft (44) that is in transmission engagement with the telescopic component (3). The front end of the first sliding member (42) is provided with a plurality of first monitoring cameras (45) and a plurality of first supplementary lights (46). The front end of the second sliding member (43) is provided with a plurality of second monitoring cameras (47) and a plurality of second supplementary lights (48).

6. The bridge defect monitoring device for crossing a highway as described in claim 5, characterized in that: The rotating arm (41) is provided with a connecting ear plate (411) rotatably connected to the rotating shaft (44). The inner walls of the rotating arm (41) are formed with first sliding grooves (412) for the first sliding member (42) to cooperate. A first displacement device (413) is provided on one side of the rotating arm (41). The front and rear ends of the rotating arm (41) are rotatably connected with first adjusting wheels (414). The first displacement device (413) is driven to cooperate with one of the first adjusting wheels (414). A first transmission belt (415) for driving the first sliding member (42) to move back and forth is wound between the two first adjusting wheels (414).

7. The bridge defect monitoring device for crossing a highway as described in claim 5, characterized in that: The outer walls of the first sliding member (42) are provided with first sliders (421) that slide with the rotating arm (41). The inner walls of the first sliding member (42) are provided with second sliding grooves (422) for the second sliding member (43) to cooperate with. A second displacement device (423) is provided on one side of the first sliding member (42). The front and rear ends of the first sliding member (42) are rotatably connected with second adjusting wheels (424). The second displacement device (423) is driven to cooperate with one of the second adjusting wheels (424). A second transmission belt (425) for driving the second sliding member (43) to move back and forth is wound between the two second adjusting wheels (424). A first mounting plate (426) is provided on one side of the first sliding member (42) for fixing a plurality of first monitoring cameras (45) and a plurality of first supplementary lights (46).

8. The bridge defect monitoring device for crossing a highway as described in claim 5, characterized in that: A second mounting plate (431) is provided on one side of the second sliding member (43) for fixing a plurality of second monitoring cameras (47) and a plurality of second supplementary lights (48).

9. The device for monitoring bridge defects across a highway according to claim 1, characterized in that: The rotating transmission frame (6) includes a first connecting plate (61), a second connecting plate (62), and a connecting shaft (63). One end of the first connecting plate (61) is rotatably connected to the movable end of the rotating support base (2). One end of the second connecting plate (62) is rotatably connected to the telescopic assembly (3). The connecting shaft (63) is rotatably connected to the other end of the first connecting plate (61) and the other end of the second connecting plate (62). The middle part of the connecting shaft (63) is rotatably connected to the movable end of the telescopic adjustment device (5).

10. The device for monitoring bridge defects across a highway according to claim 1, characterized in that: The movable base (1) includes a movable base (11), a drive wheel (14) disposed at the bottom of the movable base (11), a rotating boss (12) disposed on one side of the movable base (11) and rotatingly cooperating with the rotating support base (2), and a support frame (13) disposed in the middle of the movable base (11) for supporting the rotating support base (2).

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