A bridge crack detection device

Abstract

The present invention discloses a bridge crack detection device, belonging to the technical field of detecting bridge cracks by optical means, which includes a support carrier, a moving drive assembly installed at the bottom of the support carrier, and a detection assembly. The moving drive assembly includes a universal support wheel and two groups of rollers. The universal support wheel is located on the same central axis connecting the support carrier and the center of the detection assembly, and the two rollers are symmetrically installed on both sides of the roller. The two groups of rollers are respectively connected to a first motor; a cavity is formed inside the support carrier, and a chute extending along the vertical direction is formed at the bottom of the support carrier. The detection assembly includes a detection plate, a second motor, a cam disk, a push rod, a detection bracket, and an optical sensor. The detection plate is installed in the chute, the second motor is fixed on the top of the support carrier, and the output end of the second motor is connected to the cam disk. A circumferentially closed cam groove is formed on the cam disk. The device of the present invention can improve the detection efficiency of bridge cracks and reduce the labor intensity of manual work.

Description

Technical Field

[0001] The present invention belongs to the technical field of detecting bridge cracks by optical means, and particularly relates to a bridge crack detection device. Background Art

[0002] During the long-term use of a bridge, due to the influence of various factors such as vehicle loads, environmental factors, and the aging of its own materials, cracks are likely to occur. The existence of cracks will not only weaken the strength and stability of the bridge structure, but may also cause water to seep into the interior, accelerating the development of diseases such as steel bar corrosion, seriously threatening the safe operation of the bridge. Therefore, it is of extremely important significance to detect bridge cracks in a timely and accurate manner. At present, bridge cracks are mainly measured manually, and the width and depth of the cracks on the entire bridge deck are gradually detected manually. However, this detection method has low efficiency and high manual labor intensity. Summary of the Invention

[0003] In view of this, the purpose of the present invention is to provide a bridge crack detection device, which can improve the detection efficiency of bridge cracks and reduce the manual labor intensity.

[0004] To achieve the above purpose, the present invention provides the following technical solutions:

[0005] A bridge crack detection device disclosed by the present invention includes a support carrier, a mobile driving component and a detection component installed at the bottom of the support carrier. The mobile driving component includes a universal support wheel and two groups of rollers. The universal support wheel is located on the same central axis connecting the support carrier and the center of the detection component. The two rollers are symmetrically installed on both sides of the roller. Each group of rollers is connected to a first motor. A cavity is formed inside the support carrier, and a chute extending along the vertical direction is formed at the bottom of the support carrier. The detection component includes a detection plate, a second motor, a cam disk, a push rod, a detection bracket, and an optical sensor. The detection plate is installed in the chute. The second motor is fixed on the top of the support carrier, and the output end of the second motor is connected to the cam disk. A circumferentially closed cam groove is formed on the cam disk, and the cam groove cooperates with the push rod. The push rod is fixedly connected to the detection bracket. The detection bracket is slidably matched with the detection plate along the radial direction. An elastic connection device is arranged between the detection bracket and the detection plate. A notch corresponding to the detection bracket is formed on the detection plate. A plurality of optical sensors are evenly spaced and installed at the bottom of the detection bracket. The optical sensors can acquire bridge crack images based on optical means.

[0006] Further, a cleaning brush is provided at the bottom of the detection bracket corresponding to the optical sensor. The cleaning brush is fixedly connected with a rotating shaft. The middle part of the rotating shaft is rotationally connected to the detection bracket. The upper end of the rotating shaft is fixedly connected with a first gear. Each first gear is simultaneously engaged with a first rack, and the first rack is fixed on the inner side of the support carrier.

[0007] Further, the upper end of the optical sensor is fixedly connected with a hinge shaft. The hinge shaft is rotationally connected to a hinge seat installed at the bottom of the detection bracket. The end of the hinge shaft is simultaneously fixedly connected with a connecting rod. An opening groove is arranged along the length direction of the connecting rod. A pin shaft is fitted in the opening groove. The pin shaft is simultaneously connected with a bracket. A second rack is fixed on the bracket. The second rack is engaged with a second gear. A third motor is fixed on the detection bracket. The second gear is connected to the output end of the third motor.

[0008] Further, a limiting plate is fixed on the inner side of the support carrier. A guide hole is formed in the limiting plate. A guide rod is fixed on the detection bracket. The guide rod slides through the guide hole and then is connected to an end plate. The elastic connection device is installed between the end plate and the limiting plate.

[0009] Further, the output end of the second motor is fixedly connected with a sleeve. A transmission shaft is key-connected to the inner side of the sleeve. The cam disk is rotationally connected to the detection plate. The second motor is connected to the cam disk through the transmission shaft.

[0010] Further, the detection plate is slidably matched with the sliding groove along the vertical direction. A guide rail is integrally formed on the inner side of the sliding groove. A guide groove matched with the guide rail is formed on the outer side of the detection plate. A vertical displacement driving device for driving the displacement of the detection plate is installed on the support carrier.

[0011] Further, the vertical displacement driving device comprises an air bag, a pipe joint and an air pump. The air bag is installed between the support carrier and the detection plate. The air bag is connected to the air pump through the pipe joint. An elastic stretching device is simultaneously installed between the support carrier and the detection plate.

[0012] Further, a limiting frame is fixed on the detection plate. The limiting frame is installed on the outer side of the air bag for limiting the air bag.

[0013] The beneficial effects of the present invention are as follows:

[0014] A bridge crack detection device disclosed by the present invention can control the front-back movement of the support carrier by arranging two groups of rollers. The two groups of rollers are respectively connected with a first motor. When there is a rotational speed difference between the two groups of rollers, the steering of the support carrier can be controlled. By adopting the above device, the optical sensor can be driven to perform an all-round detection on the cracks on the bridge surface, the detection efficiency of the bridge cracks is improved, and the labor intensity of the manual work is reduced.

[0015] In a bridge crack detection device disclosed by the present invention, by arranging a cam disc, when the cam disc rotates, in cooperation with an elastic connection device, it can drive a detection bracket and an optical sensor on the detection bracket to reciprocate radially, so that further detection of positions at various radial locations can be achieved, making the detection range more comprehensive.

[0016] By adopting the device of the present invention, the structure is simple. By installing an optical sensor for small-area detection, in cooperation with the planar movement of the support carrier and the radial reciprocating movement of the detection bracket, the detection accuracy can be increased, thereby improving the detection efficiency and accuracy.

[0017] Other advantages, objectives and features of the present invention will be described in the subsequent specification, and to some extent, they are obvious to those skilled in the art, or those skilled in the art can obtain teachings from the practice of the present invention. The objectives and other advantages of the present invention can be achieved and obtained through the following specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the objectives, technical solutions and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration:

[0019] Figure 1 Structural schematic of the device of the present invention Figure 1 ;

[0020] Figure 2 Structural schematic of the device of the present invention Figure 2 ;

[0021] Figure 3 Internal structural schematic diagram of the device of the present invention;

[0022] Figure 4 Structural schematic of the detection component Figure 1 ;

[0023] Figure 5 Structural schematic of the detection component Figure 2 ;

[0024] Figure 6 For Figure 5 Enlarged view of part A in

[0025] Figure 7 Side view of the detection component.

[0026] The markings in the attached drawings are as follows: support carrier 1, moving drive assembly 2, detection assembly 3, universal support wheel 4, roller 5, first motor 6, chute 7, detection plate 8, second motor 9, cam disc 10, push rod 11, detection bracket 12, optical sensor 13, cam groove 14, elastic connection device 15, notch 16, cleaning brush 17, rotating shaft 18, first gear 19, first rack 20, hinge shaft 21, hinge seat 22, connecting rod 23, open slot 24, pin shaft 25, bracket 26, second rack 27, second gear 28, third motor 29, limit plate 30, guide rod 31, end plate 32, sleeve 33, transmission shaft 34, guide rail 35, guide groove 36, airbag 37, pipe joint 38, elastic stretching device 39, limit frame 40. Detailed implementation manners

[0027] As Figures 1 to 7 shown, a bridge crack detection device disclosed by the present invention includes a support carrier 1, a moving drive assembly 2 and a detection assembly 3 installed at the bottom of the support carrier 1. The support carrier 1 is integrally circular, which can reduce the possibility of jamming with obstacles at the edge of the on-site venue when the support carrier 1 rotates. The moving drive assembly 2 is used to drive the displacement of the support carrier 1, and the detection assembly 3 is used to detect cracks on the bridge surface when the support carrier 1 moves. It can be understood that in order to improve the detection accuracy, a supplementary light can be installed at the bottom of the support carrier 1. In some other embodiments, the moving drive assembly 2 can adopt existing technologies, such as crawlers or drive wheels, etc.

[0028] In the embodiment of the present invention, the moving drive assembly 2 includes a universal support wheel 4 and two groups of rollers 5. The universal support wheel 4 is located on the same central axis connecting the center of the support carrier 1 and the detection assembly 3. The universal support wheel 4 can adapt to the rotation of the support carrier 1, but it does not provide power by itself. The two rollers 5 are symmetrically installed on both sides of the roller 5, and the two groups of rollers 5 are respectively connected with a first motor 6; the first motor 6 adopts a servo motor, and its rotation speed can be controlled separately through a controller. By setting the two groups of rollers 5, the forward and backward movement of the support carrier 1 can be controlled. The two groups of rollers 5 are respectively connected with a first motor 6. When there is a rotation speed difference between the two groups of rollers 5, the steering of the support carrier 1 can be controlled. By adopting the above device, the optical sensor 13 can be driven to perform a full-range detection of cracks on the bridge surface, improving the detection efficiency of bridge cracks and reducing the labor intensity of manual work.

[0029] Furthermore, an inner cavity is formed inside the support carrier 1 of the present invention, which can facilitate the accommodation of various components. A chute 7 extending along the vertical direction is formed at the bottom of the support carrier 1. The detection assembly 3 includes a detection plate 8, a second motor 9, a cam disc 10, a push rod 11, a detection bracket 12, and an optical sensor 13. The detection bracket 12 is in a Z shape, and the detection plate 8 is in a thin plate shape. The detection plate 8 is installed in the chute 7 and can be installed in a fixed manner.

[0030] The second motor 9 also adopts a servo motor. The second motor 9 is fixed on the top of the support carrier 1. The output end of the second motor 9 is connected to the cam disk 10, which can drive the cam disk 10 to rotate around a vertical axis. A circumferentially closed cam groove 14 is formed on the cam disk 10. The cam groove 14 is in the shape of a six-pointed star. The cam groove 14 cooperates with the push rod 11. The push rod 11 is fixedly connected to the detection bracket 12. The detection bracket 12 is slidably matched with the detection plate 8 along the radial direction. An elastic connection device 15 is arranged between the detection bracket 12 and the detection plate 8. A notch 16 corresponding to the detection bracket 12 is formed on the detection plate 8, which is convenient for the optical sensor 13 to extend out for detection. A plurality of optical sensors 13 are evenly spaced and installed at the bottom of the detection bracket 12. The optical sensors 13 can acquire bridge crack images based on optical means.

[0031] In the embodiment of the present invention, the optical sensor 13 adopts the prior art. The optical sensor 13 receives the light reflected by the bridge, or captures the image of the bridge surface by emitting light and receiving the reflected light. These lights can be visible light, infrared light or light of other specific wavelengths; then the collected images are analyzed and processed to extract the crack information on the bridge surface, so as to detect the cracks on the bridge.

[0032] In this embodiment, a cleaning brush 17 is arranged at the bottom of the detection bracket 12 corresponding to the optical sensor 13. The cleaning brush 17 is fixedly connected with a rotating shaft 18. The middle part of the rotating shaft 18 is rotatably connected to the detection bracket 12. The upper end of the rotating shaft 18 is fixedly connected with a first gear 19. Each first gear 19 is simultaneously engaged with a first rack 20. The first rack 20 is fixed on the inner side of the support carrier 1. When the detection bracket 12 moves radially, it can drive the first gear 19 to move together, causing a relative displacement between the first gear 19 and the first rack 20. The first rack 20 can drive the first gear 19 to rotate. The first gear 19 drives the cleaning brush 17 to rotate through the rotating shaft 18, which can clean the detection head of the optical sensor 13 and improve the accuracy during detection. Through the cooperation of the gear and the rack, automatic cleaning can be realized, which can reduce the power source, save energy and is more convenient to control.

[0033] In this embodiment, a hinge shaft 21 is fixedly connected to the upper end of the optical sensor 13. The hinge shaft 21 is rotatably connected to a hinge seat 22 installed at the bottom of the detection bracket 12. One end of the hinge shaft 21 is simultaneously fixedly connected to a connecting rod 23. An opening groove 24 is arranged along the length direction of the connecting rod 23. A pin shaft 25 is fitted in the opening groove 24. The pin shaft 25 is simultaneously connected to a bracket 26. A second rack 27 is fixed on the bracket 26. The second rack 27 meshes with a second gear 28. A third motor 29 is fixed on the detection bracket 12. The second gear 28 is connected to the output end of the third motor 29. When the third motor 29 is started, the third motor 29 can drive the second gear 28 to rotate. The second gear 28 drives the second rack 27 to move along the length direction of the detection bracket 12. The second rack 27 drives the bracket 26 to displace. The bracket 26 drives the connecting rod 23 to deflect through the pin shaft 25. The connecting rod 23 drives the optical sensor 13 to deflect through the hinge shaft 21, so that the optical sensor 13 can be deflected towards the side where the cleaning brush 17 is located, and the detection head of the optical sensor 13 can be brought into contact with the cleaning brush 17, which is convenient for cleaning. When the third motor 29 rotates back, the optical sensor 13 returns to its original position, avoiding the cleaning brush 17 from affecting the detection head during the use of the optical sensor 13. Of course, a return torsion spring can be installed between the optical sensor 13 and the detection bracket 12. After the third motor 29 is unloaded, the return torsion spring can drive the optical sensor 13 to return to the working position.

[0034] In this embodiment, a limiting plate 30 is fixed inside the supporting carrier 1. A guide hole is formed in the limiting plate 30. A guide rod 31 is fixed on the detection bracket 12. The guide rod 31 slides through the guide hole and is connected to an end plate 32. An elastic connection device 15 is installed between the end plate 32 and the limiting plate 30. The elastic connection device 15 adopts a spring. The spring is sleeved outside the guide rod 31 and is used to provide an elastic restoring force for the detection bracket 12, so that after the detection bracket 12 displaces along the radial direction, it can adapt to the rotational change of the cam groove 14.

[0035] In this embodiment, a sleeve 33 is fixedly connected to the output end of the second motor 9. A transmission shaft 34 is key-connected to the inside of the sleeve 33. The cam disc 10 is rotatably connected to the detection plate 8. The second motor 9 is connected to the cam disc 10 through the transmission shaft 34. The transmission shaft 34 can slide vertically in the sleeve 33 to adapt to the height change of the cam disc 10.

[0036] In this embodiment, the detection plate 8 is slidably matched with the chute 7 along the vertical direction. A guide rail 35 is integrally formed inside the chute 7. A guide groove 36 is formed on the outside of the detection plate 8 to cooperate with the guide rail 35. A vertical displacement driving device for driving the displacement of the detection plate 8 is installed on the supporting carrier 1. When there is an obstacle, by setting the vertical displacement driving device, the detection plate 8 can be driven to displace vertically, avoiding interference between the optical sensor 13 and the obstacle.

[0037] In this embodiment, the vertical displacement driving device includes an airbag 37, a pipe joint 38 and an air pump. The airbag 37 is installed between the support carrier 1 and the detection plate 8. The airbag 37 is connected to the air pump through the pipe joint 38. An elastic stretching device 39 is also installed between the support carrier 1 and the detection plate 8. By providing the airbag 37, when the airbag 37 expands, it can drive the detection plate 8 to move downward. Using the airbag 37 for driving, even if interference occurs between the optical sensor 13 and an obstacle, the airbag 37 can play a buffering role to further protect the optical sensor 13.

[0038] In this embodiment, a limit frame 40 is fixed on the detection plate 8. The limit frame 40 is installed outside the airbag 37 to limit the airbag 37, avoiding the irregular expansion of the airbag 37 and making its expansion direction more controllable.

[0039] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A bridge crack detection device, characterized in that: The invention comprises a supporting carrier, a mobile driving component and a detecting component installed at the bottom of the supporting carrier, wherein the mobile driving component comprises a universal supporting wheel and two groups of rollers, wherein the universal supporting wheel is located on the same central axis connecting the supporting carrier and the center of the detecting component, the two rollers are symmetrically installed on both sides of the rollers, and the two groups of rollers are respectively connected to a first motor; a cavity is formed on the inner side of the supporting carrier, and a slide groove extending along a vertical direction is formed at the bottom of the supporting carrier; the detecting component comprises a detecting plate, a second motor, a cam plate, a push rod, a detecting bracket, and an optical sensor; the detecting plate is installed in the slide groove, the second motor is fixed to the top of the supporting carrier, the output end of the second motor is connected to the cam plate, a circumferentially closed cam groove is provided on the cam plate, the cam groove cooperates with the push rod, the push rod is fixedly connected to the detecting bracket, the detecting bracket slides with the detecting plate along a radial direction, an elastic connecting device is provided between the detecting bracket and the detecting plate, a notch corresponding to the detecting bracket is provided on the detecting plate, and a plurality of optical sensors are evenly installed at the bottom of the detecting bracket, and the optical sensor can The bridge crack image is obtained based on optical means; a cleaning brush is arranged at the bottom of the detection bracket corresponding to the optical sensor, the cleaning brush is fixedly connected with a rotating shaft, the middle part of the rotating shaft is rotatably connected with the detection bracket, the upper end of the rotating shaft is fixedly connected with a first gear, each first gear is simultaneously meshed with a first rack, and the first rack is fixed on the inner side of the support carrier; the upper end of the optical sensor is fixedly connected with a hinge shaft, the hinge shaft is rotatably connected to the hinge seat installed at the bottom of the detection bracket, the end of the hinge shaft is simultaneously fixedly connected with a connecting rod, an open groove is arranged on the connecting rod along its length direction, a pin is matched in the open groove, the pin is simultaneously connected with a bracket, a second rack is fixed on the bracket, the second rack is meshed with a second gear, a third motor is fixed on the detection bracket, and the second gear is connected to the output end of the third motor; a limiting plate is fixed on the inner side of the support carrier, a guide hole is opened on the limiting plate, a guide rod is fixed on the detection bracket, the guide rod is connected to the end plate after sliding through the guide hole, and the elastic connecting device is installed between the end plate and the limiting plate.

2. A bridge crack detection device according to claim 1, characterized in that: The output end of the second motor is fixedly connected with a sleeve, the inner key of the sleeve is connected with a transmission shaft, the cam plate is rotationally connected to the detection plate, and the second motor is connected to the cam plate through the transmission shaft.

3. A bridge crack detection device according to claim 2, characterized in that: The detection plate slides with the slide groove along the vertical direction, a guide rail is integrally formed on the inner side of the slide groove, a guide groove cooperating with the guide rail is formed on the outer side of the detection plate, and a vertical displacement driving device for driving the displacement of the detection plate is installed on the support carrier.

4. A bridge crack detection device according to claim 3, characterized in that: The vertical displacement driving device includes an airbag, a pipe joint and an air pump. The airbag is installed between the support carrier and the detection plate. The airbag is connected to the air pump through the pipe joint. An elastic stretching device is also installed between the support carrier and the detection plate.

5. A bridge crack detection device according to claim 4, characterized in that: A limit frame is fixed on the detection plate, and the limit frame is installed on the outside of the airbag to limit the airbag.

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