Road and bridge asphalt pavement crack detection device

Abstract

The invention discloses a road and bridge asphalt pavement crack detection device which comprises a base, a damping mechanism, a walking mechanism, a laser transmitter, a laser receiver, a heat sensor and a control system. The base is installed on a walking mechanism through the damping mechanism, the laser transmitter is installed on the base, and the laser transmitter is used for detecting whether cracks exist on a road surface or not; the laser receiver is mounted on the base and is used for receiving a laser beam returned from a road surface; the heat sensor is used for detecting parameters of pavement cracks; and the laser transmitter, the laser receiver and the heat sensor are all electrically connected with the control system. The invention aims to provide the road and bridge asphalt pavement crack detection device, cracks can be accurately positioned, and the detection accuracy can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of road surface detection equipment, and in particular to a device for detecting cracks in asphalt pavement of roads and bridges. Background Art

[0002] The asphalt pavement crack detection device for roads and bridges is an intelligent device used to automatically identify and assess pavement cracks. It is widely used in the maintenance and management of transportation infrastructure such as roads and bridges. The device typically consists of an image acquisition system, a data processing unit, and crack analysis software. It combines computer vision and artificial intelligence technologies to achieve efficient and accurate crack detection.

[0003] Current crack detection devices for asphalt pavements on roads and bridges mostly use mobile high-definition cameras to capture images of cracks. However, in actual applications, the following major problems still exist: First, when the mobile high-definition camera is mounted on a vehicle and shooting, excessive vehicle speed or bumpy road conditions can lead to inaccurate crack location. Second, in strong light, backlight, or puddles, the image is prone to overexposure or underexposure, resulting in reduced crack contrast and inaccurate detection data. Summary of the Invention

[0004] In order to overcome the deficiencies of the prior art, the purpose of the present invention is to provide a device for detecting cracks in asphalt pavements of roads and bridges, which can accurately locate cracks and improve the inspection accuracy.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] A device for detecting cracks in asphalt pavement of a road bridge comprises a base, a shock absorbing mechanism, a traveling mechanism, a laser transmitter, a laser receiver, a thermal sensor and a control system;

[0007] The base is mounted on the walking mechanism via the shock absorbing mechanism, and the laser emitter is mounted on the base, and the laser emitter is used to detect whether there are cracks on the road surface;

[0008] The laser receiver is mounted on the base and is used to receive the laser beam returned from the road surface;

[0009] The thermal sensor is used to detect parameters of pavement cracks;

[0010] The control system, the laser transmitter, the laser receiver and the thermal sensor are all electrically connected to the control system.

[0011] Furthermore, the walking mechanism includes a frame, a motor mounted on the frame, and wheels mounted on the frame. The motor is drive-connected to the wheels. The base is mounted on the frame through the shock absorbing mechanism. The frame is equipped with a spirit level.

[0012] Furthermore, the wheel is a shock-absorbing wheel.

[0013] Furthermore, the wheel includes a wheel body and a plurality of shock-absorbing sleeves, wherein the plurality of shock-absorbing sleeves are distributed at intervals around the circumference of the wheel body, and the axis of the shock-absorbing sleeve is inclined relative to the axis of the wheel body and extends from one end of the wheel body to the other end of the wheel body.

[0014] Furthermore, the shock absorbing mechanism includes a plurality of lifting rods and a plurality of elastic members, one of the base and the frame is connected to one end of the lifting rod, and the other is movably plugged into the other end of the lifting rod, each of the elastic members is respectively sleeved on one of the lifting rods, and the two ends of the elastic members respectively abut the base and the frame.

[0015] Furthermore, the base is connected to a dust cover, which is arranged above the base to form a dust-proof cavity with the base, and the laser transmitter, the laser receiver and the thermal sensor are all arranged in the dust-proof cavity.

[0016] Furthermore, the dust cover is provided with an avoidance through hole, and the laser emitter is passed through the avoidance through hole.

[0017] Furthermore, the device for detecting cracks in asphalt pavement of a road bridge further comprises a display screen, which is arranged on a surface away from the dust cover, and is connected to the control system.

[0018] Furthermore, the base is equipped with a positioning seat, and the thermal sensor is installed on the positioning seat.

[0019] Furthermore, a hollow through hole is provided at the bottom of the base, and the thermal sensor faces the hollow through hole.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The base is mounted on the walking mechanism through the shock absorbing mechanism, and the laser emitter is mounted on the base. The laser emitter is used to detect whether there are cracks on the road surface. It can be understood that the laser emitter plays a pre-inspection role by emitting a laser beam to scan the road surface, so as to roughly determine the location of the ground cracks.

[0022] 2. The thermal sensor is used to detect parameters of road cracks. It can be understood that compared with mobile high-definition cameras, thermal sensors are less affected by the environment during operation and the parameters they obtain are more comprehensive. Crack parameters include geometric parameters (length, width and depth) and location parameters (located at the center, edge or joint of the lane).

[0023] 3. A control system. The laser transmitter, laser receiver, and thermal sensor are all electrically connected to the control system. It is understood that the control system can be a single-chip microcomputer. The control system controls the laser transmitter to emit a laser beam, and the laser receiver to receive the laser beam returned from the ground. The control system receives the optical signal emitted by the laser receiver and calculates the time difference. Due to the depth of the ground crack, the laser beam takes longer to reach the ground crack and return than on a normal road surface. Therefore, the control system can determine the location of the ground crack based on this. The control system controls the thermal sensor by electrically connecting to the thermal sensor to move to the ground crack location for detection, thereby achieving precise positioning. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the structure of the present invention, with the dust cover in the cover-mounted state;

[0025] Figure 2 This is a schematic diagram of the structure of the present invention, with the dust cover in the open state;

[0026] Figure 3 It is a structural schematic diagram of the walking mechanism of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the shock-absorbing wheel of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the shock absorbing mechanism of the present invention, without wheels;

[0029] Figure 6 It is a right side view of the present invention;

[0030] Figure 7 for Figure 6 A half-section view of the present invention shown;

[0031] Figure 8 It is a flowchart of the working principle of the present invention.

[0032] In the figure: 1. Base; 2. Shock-absorbing mechanism; 21. Lifting rod; 22. Elastic member; 3. Traveling mechanism; 31. Frame; 32. Motor; 33. Wheel; 331. Wheel body; 332. Shock-absorbing sleeve; 4. Laser transmitter; 5. Laser receiver; 6. Thermal sensor; 7. Control system; 8. Level; 9. Dust cover; 91. Dust-proof chamber; 92. Avoidance through hole; 10. Display screen; 11. Positioning seat; 12. Hollow through hole. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0034] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly attached to the other element, or there may be an intermediate element. When an element is referred to as being "connected to" another element, it may be directly connected to the other element, or there may be an intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification are for the purpose of describing specific embodiments only and are not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0036] like Figures 1 to 2 As shown, the present invention discloses a device for detecting cracks in asphalt pavement of a road bridge, comprising a base 1, a shock absorbing mechanism 2, a traveling mechanism 3, a laser transmitter 4, a laser receiver 5, a thermal sensor 6 and a control system 7;

[0037] The base 1 is mounted on the walking mechanism 3 through the shock absorbing mechanism 2, and the laser emitter 4 is mounted on the base 1. The laser emitter 4 is used to detect whether there are cracks on the road surface. It can be understood that the laser emitter 4 plays a pre-inspection role by emitting a laser beam to scan the road surface, so as to roughly determine the location of the ground cracks.

[0038] The laser receiver 5 is installed on the base 1 and is used to receive the laser beam returned from the road surface. It can be understood that the laser receiver 5 directionally receives the laser beam emitted by the laser transmitter 4 to the detection road surface. Due to the uneven road surface, there is a time difference in the laser receiver 5 receiving the laser beam.

[0039] The thermal sensor 6 is used to detect the parameters of road cracks. It can be understood that compared with a mobile high-definition camera, the thermal sensor 6 is less affected by the environment when working, and the parameters obtained are more comprehensive. The crack parameters include geometric parameters (length, width and depth), and position parameters (located at the center, edge or joint of the lane).

[0040] The control system 7, the laser emitter 4, the laser receiver 5 and the thermal sensor 6 are all electrically connected to the control system 7. It can be understood that the control system 7 can be a single-chip microcomputer. The control system 7 controls the laser emitter 4 to emit a laser beam, and the laser receiver 5 to receive the laser beam returned from the ground. The control system 7 receives the light signal emitted by the laser receiver 5 and calculates the time difference. Since the ground cracks have depth, the time it takes for the laser beam to reach the ground cracks and return will be longer than that of the normal road surface. Therefore, the control system 7 can determine the location of the ground cracks based on this. The control system 7 is electrically connected to the thermal sensor 6 to control the thermal sensor 6 to move to the ground crack position for detection, thereby achieving precise positioning.

[0041] like Figure 3 As shown, the traveling mechanism 3 preferably includes a frame 31, a motor 32 mounted on the frame 31, and wheels 33 mounted on the frame 31. The motor 32 is drivingly connected to the wheels 33. The base 1 is mounted to the frame 31 via the shock-absorbing mechanism 2. The frame 31 is equipped with a spirit level 8. It is understood that the traveling mechanism 3 is used to drive the base 1 to move horizontally on the ground. The installation of the motor 32 enables rapid response and improves movement efficiency. Due to bumpy roads, the spirit level 8 is provided to determine, based on the reading of the spirit level 8, whether the frame 31 and base 1 are level when the traveling mechanism 3 is moving, and whether the thermal sensor 6 remains relatively level with the ground when the traveling mechanism 3 is stopped. In addition, installing the spirit level 8 on the frame 31 eliminates the influence of the shock-absorbing mechanism 2 and accurately reflects the ground conditions.

[0042] like Figure 4 As shown, preferably, the wheels 33 are shock-absorbing wheels. It is understood that when the traveling mechanism 3 moves, it may encounter uneven roads. The use of shock-absorbing wheels can pre-absorb some of the vibrations, preventing the laser beam of the laser transmitter 4 from being disturbed due to high-speed oscillation, thereby making the laser beam received by the laser receiver 5 lose its reference value, thus playing the role of initial shock absorption.

[0043] Preferably, the wheel 33 includes a wheel body 331 and a plurality of shock-absorbing sleeves 332. The plurality of shock-absorbing sleeves 332 are spaced apart around the circumference of the wheel body 331. The axis of the shock-absorbing sleeve 332 is arranged at an angle relative to the axis of the wheel body 331 and extends from one end of the wheel body 331 to the other end of the wheel body 331. It will be appreciated that this approach eliminates the need for a steering mechanism and allows for omnidirectional movement, including forward and backward, left and right, diagonal movement, and rotation.

[0044] like Figure 5As shown, preferably, the shock-absorbing mechanism 2 includes a plurality of lifting rods 21 and a plurality of elastic members 22. One of the base 1 and the frame 31 is connected to one end of the lifting rod 21, and the other is movably plugged into the other end of the lifting rod 21. Each elastic member 22 is respectively sleeved on one of the lifting rods 21, and the two ends of the elastic member 22 respectively abut against the base 1 and the frame 31. It can be understood that when the traveling mechanism 3 encounters a bumpy road surface during operation, the raised road surface lifts the frame 31, the lifting rod 21 moves upward, and the elastic member 22 is compressed. The elastic member 22 converts the upward supporting force into elastic potential energy, thereby reducing the impact on the base 1, thereby playing a secondary shock-absorbing role based on the shock-absorbing wheel shock-absorbing effect.

[0045] like Figures 6 and 7 As shown, preferably, the base 1 is connected to a dust cover 9, which is arranged above the base 1 to form a dustproof chamber 91 with the base 1. The laser emitter 4, the laser receiver 5, and the thermal sensor 6 are all arranged in the dustproof chamber 91. It can be understood that the laser emitter 4, the laser receiver 5, and the thermal sensor 6 are all high-precision devices. Dust contamination can easily cause laser scattering or attenuation, reducing signal strength or measurement accuracy. The thermal sensor 6 may also affect the heat dissipation performance due to dust accumulation, resulting in temperature detection errors. Therefore, arranging the laser emitter 4, the laser receiver 5, and the thermal sensor 6 in the dustproof chamber 91 can ensure the long-term stability of the device.

[0046] Preferably, the dust cover 9 is provided with an escape hole 92, and the laser emitter 4 is passed through the escape hole 92. It can be understood that the scanning path of the laser emitter 4 is the walking path of the present invention when it is working.

[0047] Preferably, the device for detecting cracks in asphalt pavement of a road bridge further comprises a display screen 10, which is disposed on a surface away from the dust cover 9 and is connected to the control system 7. It is understood that, through the control system 7, the display screen 10 can receive the parameters of the pavement cracks detected by the thermal sensor 6, and based on these basic parameters, combined with software, can further derive the causes of the cracks (e.g., load-related, low-temperature shrinkage, or network cracks caused by asphalt aging or concrete carbonization cracks) and display them digitally on the screen.

[0048] Furthermore, the base 1 is provided with a positioning seat 11, and the thermal sensor 6 is mounted on the positioning seat 11. It can be understood that the positioning seat 11 is used to fix the thermal sensor 6 to prevent it from being displaced due to vibration.

[0049] Furthermore, a hollow through hole 12 is formed at the bottom of the base 1 , and the thermal sensor 6 faces the hollow through hole 12 .

[0050] like Figure 8 As shown, the working principle of the present invention is as follows: the motor 32 controls the walking mechanism 3 to move on the road surface, the laser transmitter 4 emits a laser beam to scan the road surface to be detected, the laser receiver 5 receives the laser beam returned by the road surface, the control system 7 calculates the time difference to obtain the approximate direction of the ground crack and then marks the detection point, the control system 7 drives the walking mechanism 3 to move toward the detection point, and when the road bridge asphalt pavement crack detection device of the present invention moves to the point to be detected, the thermal sensor 6 scans and detects potential ground cracks, and transmits the obtained ground crack parameters to the display screen 10 through the control system 7.

[0051] In the description of this specification, the reference terms "one embodiment," "some embodiments," "example," "specific example," or "some examples" mean that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials, or characteristics described may be combined in any appropriate manner in any one or more embodiments or examples. In addition, those skilled in the art may combine and integrate different embodiments or examples described in this specification, as well as features of different embodiments or examples, unless they are mutually inconsistent.

[0052] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0053] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any person skilled in the art can easily conceive of various modifications or substitutions within the technical scope disclosed in this application, and such modifications or substitutions should be included within the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A device for detecting cracks in asphalt pavement of roads and bridges, characterized by: It comprises a base (1), a shock absorbing mechanism (2), a walking mechanism (3), a laser transmitter (4), a laser receiver (5), a thermal sensor (6) and a control system (7); The base (1) is mounted on the walking mechanism (3) via the shock absorbing mechanism (2), and the laser emitter (4) is mounted on the base (1). The laser emitter (4) is used to detect whether cracks exist on the road surface. The laser receiver (5) is mounted on the base (1) and is used to receive the laser beam returned from the road surface; The thermal sensor (6) is used to detect parameters of road cracks; The control system (7), the laser transmitter (4), the laser receiver (5) and the thermal sensor (6) are all electrically connected to the control system (7).

2. The device for detecting cracks in asphalt pavement of a road bridge according to claim 1, characterized in that: The walking mechanism (3) comprises a frame (31), a motor (32) mounted on the frame (31), and wheels (33) mounted on the frame (31); the motor (32) and the wheels (33) are drivingly connected; the base (1) is mounted on the frame (31) via the shock absorbing mechanism (2); and a level (8) is mounted on the frame (31).

3. The device for detecting cracks in asphalt pavement of a road bridge according to claim 2, characterized in that: The wheel (33) is a shock-absorbing wheel.

4. The device for detecting cracks in asphalt pavement of a road bridge according to claim 3, characterized in that: The wheel (33) includes a wheel body (331) and a plurality of shock-absorbing sleeves (332). The plurality of shock-absorbing sleeves (332) are distributed at intervals around the circumference of the wheel body (331). The axis of the shock-absorbing sleeve (332) is arranged to be inclined relative to the axis of the wheel body (331) and extends from one end of the wheel body (331) to the other end of the wheel body (331).

5. The device for detecting cracks in asphalt pavement of a road bridge according to claim 2, characterized in that: The shock absorbing mechanism (2) comprises a plurality of lifting rods (21) and a plurality of elastic members (22); one of the base (1) and the frame (31) is connected to one end of the lifting rod (21), and the other is movably plugged into the other end of the lifting rod (21); each of the elastic members (22) is respectively sleeved on one of the lifting rods (21); and both ends of the elastic members (22) respectively abut against the base (1) and the frame (31).

6. The device for detecting cracks in asphalt pavement of a road bridge according to claim 1, characterized in that: The base (1) is connected to a dust cover (9), and the dust cover (9) is arranged above the base (1) to form a dust-proof cavity (91) with the base (1), and the laser transmitter (4), the laser receiver (5) and the thermal sensor (6) are all arranged in the dust-proof cavity (91).

7. The device for detecting cracks in asphalt pavement of a road bridge according to claim 6, characterized in that: The dust cover (9) is provided with an avoidance through hole (92), and the laser emitter (4) is passed through the avoidance through hole (92).

8. The device for detecting cracks in asphalt pavement of a road bridge according to claim 6, characterized in that: The device for detecting cracks in asphalt pavement of a road bridge further comprises a display screen (10), wherein the display screen (10) is arranged on a surface away from the dust cover (9), and the display screen (10) is connected to the control system (7).

9. The device for detecting cracks in asphalt pavement of a road bridge according to claim 1, characterized in that: The base (1) is installed with a positioning seat (11), and the thermal sensor (6) is installed on the positioning seat (11).

10. The device for detecting cracks in asphalt pavement of a road bridge according to claim 1, characterized in that: A hollow through hole (12) is provided at the bottom of the base (1), and the thermal sensor (6) faces the hollow through hole (12).

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