A road crack detection system based on UAV image processing

Abstract

The present invention discloses a road crack detection system based on drone image processing, which is applied in the field of road detection equipment, including a fixed frame, a mounting frame welded on the top of the fixed frame, a detector placed inside the fixed frame, two fixed rods penetrating the top of the fixed frame, a fixed plate fixedly sleeved on the surface of the fixed rod, a limit spring bolted between the top of the fixed plate and the fixed frame through a spring fixing sheet, a motor bolted to the bottom of the fixed frame, a rotating shaft fixedly sleeved on the output end of the motor through a coupling, a mounting seat installed on the other end of the rotating shaft, and a cleaning brush bolted to the front of the mounting seat. It is convenient for personnel to disassemble and maintain, the operation is simple and labor-saving, and the stability and flexibility are good. At the same time, it can have a self-cleaning function at the lens, which ensures the accuracy of equipment detection, reduces the time and burden required for personnel cleaning, and is highly practical.

Description

Technical Field

[0001] The present invention relates to the field of road detection equipment, and in particular to a road crack detection system based on unmanned aerial vehicle image processing. Background Art

[0002] Pavement cracks are one of the common road diseases. If they are not detected and treated in time, they will affect the performance and life of the road surface. Therefore, pavement crack detection is a very important task in road maintenance. When detecting road cracks, it is necessary to use drones to carry equipment and use laser pulses or continuous wave laser beams to measure the target distance. Common distance measurement methods include pulse method, phase method, triangulation method and interference method. Among them, triangulation method is a commonly used method. It emits a laser beam to the surface of the object to be measured. The reflected light is focused by the lens and imaged on the image sensor. The center position of the light spot is calculated through digital processing to determine the distance.

[0003] Although the existing crack detection device occupies a small space and has stable performance, there are still other problems in the process of use. For example, it is not convenient for personnel to perform quick disassembly maintenance. The detector needs to be regularly maintained and calibrated during use. It needs to be removed from the bracket during operation. Since it is directly fixed by screws, tools are needed to assist in the disassembly and assembly process, which is time-consuming and labor-intensive. In addition, it does not have a self-cleaning function at the lens. When the equipment is flying at high altitude with a drone, the lens may be blocked or contaminated by dust and other impurities. In order to ensure the accuracy of the detection, in this case, the drone can only be retracted and manually cleaned, and then released again and returned to the initial point, which reduces the detection efficiency of the equipment. In order to solve the above problems, we propose a road crack detection system based on drone image processing. Summary of the invention

[0004] The purpose of the present invention is to provide a road crack detection system based on drone image processing, which solves the problem that the existing crack detection device is inconvenient for personnel to disassemble and maintain and does not have a self-cleaning function at the lens.

[0005] The above technical purpose of the present invention is achieved through the following technical solutions: a road crack detection system based on drone image processing, comprising a fixed frame, a mounting frame welded on the top of the fixed frame, a detector placed inside the fixed frame, two fixed rods passing through the top of the fixed frame, a fixed plate fixedly sleeved on the surface of the fixed rod, a limit spring bolted between the top of the fixed plate and the fixed frame through a spring fixing sheet, a motor bolted to the bottom of the fixed frame, a rotating shaft fixedly sleeved on the output end of the motor through a coupling, a mounting seat installed on the other end of the rotating shaft, and a cleaning brush bolted to the front of the mounting seat.

[0006] The above technical solution can be easily disassembled and maintained by personnel, and the operation is simple and labor-saving, with good stability and flexibility. At the same time, it can have a self-cleaning function at the lens, which ensures the accuracy of equipment detection, reduces the time and burden required for personnel cleaning, and is highly practical.

[0007] The present invention is further configured as follows: a pull plate is provided on the top of the fixing frame, and the bottom of the pull plate is welded to the top of the fixing rod.

[0008] By adopting the above technical solution and setting the pull plate, it is convenient for personnel to lift the two fixing rods upwards, thereby separating them from the limiting holes in the mounting ears of the detector below.

[0009] The present invention is further configured as follows: a guide rod is welded to one side of the fixing plate, guide grooves are provided on both sides of the fixing frame, and the other end of the guide rod extends to the outside of the fixing frame through the guide groove.

[0010] By adopting the above technical solution, the fixing rod can be limited by setting the guide rod and the guide groove, so as to prevent the fixing rod from tilting during the process of moving up and down.

[0011] The present invention is further configured such that surfaces of the fixing frame and the mounting frame are coated with anti-corrosion paint.

[0012] By adopting the above technical solution and providing the anti-corrosion coating, the anti-corrosion and moisture-proof effects on the surfaces of the fixing frame and the mounting frame can be improved.

[0013] The present invention is further configured as follows: two mounting holes are provided on the top of the mounting frame.

[0014] By adopting the above technical solution and setting the mounting holes, it is convenient for personnel to fix the mounting frame under the drone with screws.

[0015] The present invention is further configured as follows: a protective cover is bolted to the bottom of the fixing frame, and a through hole is opened on the front of the protective cover.

[0016] By adopting the above technical solution, the motor can be protected by providing the protective cover and the through hole, thereby preventing the motor from being hit and malfunctioning.

[0017] The present invention is further configured as follows: a heat dissipation slot is provided on the back of the protective cover, and a dustproof net is bolted to the back of the protective cover.

[0018] By adopting the above technical solution, the ventilation effect in the protective cover can be improved through the provision of the heat dissipation grooves and the dustproof net, and dust can be prevented from entering.

[0019] In summary, the present invention has the following beneficial effects:

[0020] 1. The present invention first fixes the mounting frame to the drone with screws, and when the mounting frame is fixed, grab the pull plate with one hand and pull it up. When the pull plate is pulled up, it will drive the fixing rod and the fixing plate to move upward through the cooperation of the guide rod and the guide groove. When the pull plate is pulled to the bottom, the detector is pushed into the fixing frame with the other hand, and then the limit hole on the mounting ear of the detector is aligned with the fixing rod and the pull plate is released. After the pull plate is released, the fixing rod will be pushed down and inserted into the limit hole, which is convenient for personnel to disassemble and maintain, and the operation is simple and labor-saving, and the stability and flexibility are good;

[0021] 2. When the lens of the detector is blocked at high altitude, the present invention starts the motor. After starting, the motor will drive the rotating shaft to rotate through the coupling. The rotating shaft will drive the mounting seat to rotate when rotating. The mounting seat will drive the cleaning brush to rotate together when rotating. The cleaning brush will scrape off impurities at the front lens of the detector when rotating, and finally rotate to an unblocked position and stop. The lens can have a self-cleaning function, which ensures the accuracy of equipment detection, reduces the time and burden required for personnel cleaning, and is highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional diagram of the structure of the present invention;

[0023] Figure 2 It is a partial cross-sectional view of the front side of the structure of the present invention;

[0024] Figure 3 It is a partial sectional view of the left side of the structure of the present invention.

[0025] Figure numerals: 1. fixing frame; 2. mounting frame; 3. detector; 4. fixing rod; 5. fixing plate; 6. limit spring; 7. motor; 8. rotating shaft; 9. mounting seat; 10. cleaning brush; 11. pull plate; 12. guide rod; 13. guide groove; 14. mounting hole; 15. protective cover; 16. dust net. DETAILED DESCRIPTION

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0027] Embodiment 1:

[0028] refer to Figure 1 , Figure 2 and Figure 3, a road crack detection system based on drone image processing, including a fixed frame 1, a mounting frame 2 is welded on the top of the fixed frame 1, a detector 3 is placed inside the fixed frame 1, two fixing rods 4 are arranged on the top of the fixed frame 1, and a fixing plate 5 is fixedly sleeved on the surface of the fixing rod 4. A limiting spring 6 is bolted between the top of the fixing plate 5 and the fixing frame 1 through a spring fixing sheet. The mounting frame 2 is fixed to the drone with screws first, and when the mounting frame 2 is fixed, the pull plate 11 is grabbed with one hand and pulled up. When the pull plate 11 is pulled up, the fixing rod 4 and the fixing plate 5 are driven to move upward through the cooperation of the guide rod 12 and the guide groove 13. When the pull plate 11 is pulled up to the bottom, the detector 3 is pushed into the fixed frame 1 with the other hand, and then the limiting hole on the mounting ear of the detector 3 is aligned with the fixing rod 4 and the pull plate 11 is released. After the pull plate 11 is released, the fixing rod 4 is pushed down and inserted into the limiting hole, which can be convenient for personnel to disassemble and maintain, and the operation is simple and labor-saving, and the stability and flexibility are good.

[0029] refer to Figure 1 and Figure 2 A pull plate 11 is provided on the top of the fixed frame 1, and the bottom of the pull plate 11 is welded to the top of the fixed rod 4. Through the setting of the pull plate 11, it is convenient for personnel to lift the two fixed rods 4 upward, thereby separating them from the limiting holes in the mounting ears of the detector 3 below.

[0030] refer to Figure 1 , Figure 2 and Figure 3 A guide rod 12 is welded on one side of the fixing plate 5, and guide grooves 13 are provided on both sides of the fixing frame 1. The other end of the guide rod 12 extends to the outside of the fixing frame 1 through the guide groove 13. Through the setting of the guide rod 12 and the guide groove 13, the fixing rod 4 can be limited to prevent the fixing rod 4 from tilting during the up and down movement.

[0031] refer to Figure 1 , Figure 2 and Figure 3 The surfaces of the fixing frame 1 and the mounting frame 2 are coated with anti-corrosion paint. By setting the anti-corrosion paint, the anti-corrosion and moisture-proof effects of the surfaces of the fixing frame 1 and the mounting frame 2 can be improved.

[0032] refer to Figure 1 and Figure 2 Two mounting holes 14 are provided on the top of the mounting frame 2. The mounting holes 14 are provided to facilitate personnel to fix the mounting frame 2 under the drone with screws.

[0033] Brief description of the usage process: first fix the mounting frame 2 to the drone with screws, and when the mounting frame 2 is fixed, grab the pull plate 11 with one hand and pull it up. When the pull plate 11 is pulled up, it will drive the fixing rod 4 and the fixing plate 5 to move upward through the cooperation of the guide rod 12 and the guide groove 13. When the pull plate 11 is pulled up to the bottom, use the other hand to push the detector 3 into the fixing frame 1, and then align the limiting hole on the mounting ear of the detector 3 with the fixing rod 4 and then release the pull plate 11. After the pull plate 11 is released, it will push the fixing rod 4 down and insert it into the limiting hole.

[0034] Embodiment 2:

[0035] refer to Figure 1 , Figure 2 and Figure 3 A road crack detection system based on drone image processing, a motor 7 is bolted to the bottom of the fixed frame 1, and the output end of the motor 7 is fixedly sleeved with a rotating shaft 8 through a coupling, and the other end of the rotating shaft 8 is installed with a mounting seat 9, and a cleaning brush 10 is bolted to the front of the mounting seat 9. When the lens of the detector 3 is blocked at high altitude, the motor 7 is started. After starting, the motor 7 will drive the rotating shaft 8 to rotate through the coupling. When the rotating shaft 8 rotates, it will drive the mounting seat 9 to rotate. When the mounting seat 9 rotates, it will drive the cleaning brush 10 to rotate together. When the cleaning brush 10 rotates, it will scrape off the impurities at the front lens of the detector 3, and finally rotate to a non-blocking position and stop. It can have a self-cleaning function at the lens, which ensures the accuracy of equipment detection, reduces the time and burden required for personnel cleaning, and has high practicality.

[0036] refer to Figure 1 , Figure 2 and Figure 3 A protective cover 15 is bolted to the bottom of the fixed frame 1, and a through hole is opened on the front of the protective cover 15. Through the setting of the protective cover 15 and the through hole, the motor 7 can be protected to prevent the motor 7 from being hit and malfunctioning.

[0037] refer to Figure 3 A heat dissipation groove is provided on the back of the protective cover 15, and a dustproof net 16 is bolted to the back of the protective cover 15. The arrangement of the heat dissipation groove and the dustproof net 16 can improve the ventilation effect in the protective cover 15 and prevent dust from entering.

[0038] Brief description of the usage process: when the lens of the detector 3 is blocked at high altitude, start the motor 7. After starting, the motor 7 will drive the rotating shaft 8 to rotate through the coupling. When the rotating shaft 8 rotates, it will drive the mounting seat 9 to rotate. When the mounting seat 9 rotates, it will drive the cleaning brush 10 to rotate together. When the cleaning brush 10 rotates, it will scrape off the impurities on the front lens of the detector 3, and finally rotate to the unblocked position and stop.

[0039] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A road crack detection system based on drone image processing, comprising a fixed frame (1), characterized in that: A mounting frame (2) is welded to the top of the fixed frame (1), a detector (3) is placed inside the fixed frame (1), two fixing rods (4) are arranged through the top of the fixed frame (1), a fixing plate (5) is fixedly sleeved on the surface of the fixing rod (4), a limiting spring (6) is bolted between the top of the fixing plate (5) and the fixed frame (1) via a spring fixing sheet, a motor (7) is bolted to the bottom of the fixed frame (1), a rotating shaft (8) is fixedly sleeved at the output end of the motor (7) via a coupling, a mounting seat (9) is installed at the other end of the rotating shaft (8), and a cleaning brush (10) is bolted to the front of the mounting seat (9).

2. A road crack detection system based on drone image processing according to claim 1, characterized in that: A pull plate (11) is provided on the top of the fixing frame (1), and the bottom of the pull plate (11) is welded to the top of the fixing rod (4).

3. The road crack detection system based on drone image processing according to claim 1 is characterized in that: A guide rod (12) is welded to one side of the fixing plate (5), guide grooves (13) are provided on both sides of the fixing frame (1), and the other end of the guide rod (12) extends to the outside of the fixing frame (1) through the guide groove (13).

4. The road crack detection system based on drone image processing according to claim 1 is characterized in that: The surfaces of the fixing frame (1) and the mounting frame (2) are both coated with anti-corrosion paint.

5. The road crack detection system based on drone image processing according to claim 1 is characterized in that: Two mounting holes (14) are provided on the top of the mounting frame (2).

6. The road crack detection system based on drone image processing according to claim 1 is characterized in that: A protective cover (15) is bolted to the bottom of the fixing frame (1), and a through hole is provided on the front of the protective cover (15).

7. The road crack detection system based on drone image processing according to claim 2 is characterized in that: A heat dissipation slot is provided on the back of the protective cover (15), and a dustproof net (16) is bolted to the back of the protective cover (15).

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