Bridge crack detection device

Abstract

The invention discloses a bridge crack detection device, and belongs to the technical field of bridge crack detection by adopting an optical means, the bridge crack detection device comprises a support carrier, a mobile driving assembly and a detection assembly, the mobile driving assembly and the detection assembly are mounted at the bottom of the support carrier, and the mobile driving assembly comprises a universal support wheel and two groups of rollers; the universal supporting wheel is located on the same central axis connecting the center of the supporting carrier and the center of the detection assembly, the two rolling wheels are symmetrically installed on the two sides of the rolling wheels, and the two sets of rolling wheels are connected with first motors respectively; a cavity is formed in the inner side of the supporting carrier, a sliding groove extending in the vertical direction is formed in the bottom of the supporting carrier, the detection assembly comprises a detection plate, a second motor, a cam disc, a push rod, a detection support and an optical sensor, the detection plate is installed in the sliding groove, the second motor is fixed to the top of the supporting carrier, and the output end of the second motor is connected to the cam disc. The cam disc is provided with a cam groove which is closed in the circumferential direction. According to the device, the bridge crack detection efficiency can be improved, and the labor intensity of workers is reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of bridge crack detection using optical means, and specifically relates to a bridge crack detection device. Background Art

[0002] During the long-term use of bridges, cracks are prone to occur due to the influence of various factors such as vehicle loads, environmental factors, and aging of the bridge materials. The existence of cracks will not only weaken the strength and stability of the bridge structure, but may also cause moisture to penetrate into the interior, accelerate the development of steel corrosion and other diseases, and seriously threaten the safe operation of the bridge. Therefore, timely and accurate detection of bridge cracks is extremely important. At present, bridge cracks are mainly measured manually, and the width and depth of cracks on the entire bridge deck are gradually detected manually. However, this method has low detection efficiency and high labor intensity. Summary of the invention

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

[0004] In order to achieve the above object, the present invention provides the following technical solutions: A bridge crack detection device disclosed in the present invention comprises a support carrier, a mobile drive assembly installed at the bottom of the support carrier, and a detection assembly, wherein the mobile drive assembly comprises a universal support wheel and two groups of rollers, wherein the universal support wheel is located on the same central axis connecting the support carrier and the center of the detection assembly, and 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 support carrier, and a slide groove extending along a vertical direction is formed at the bottom of the support carrier; the detection assembly comprises a detection plate, a second motor, a cam plate, a push rod, a detection bracket, and an optical sensor, wherein the detection plate is installed in the slide groove, 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 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 detection bracket, the detection bracket slides with the detection plate along the radial direction, an elastic connection device is provided between the detection bracket and the detection plate, a notch corresponding to the detection bracket is provided on the detection plate, and a plurality of optical sensors are evenly installed at the bottom of the detection bracket, and the optical sensor can obtain a bridge crack image based on optical means.

[0005] Furthermore, a cleaning brush is provided at the bottom of the detection bracket corresponding to the optical sensor, and the cleaning brush is fixedly connected to a rotating shaft, a middle part of the rotating shaft is rotatably connected to the detection bracket, an upper end of the rotating shaft is fixedly connected to a first gear, each first gear is simultaneously meshed with a first rack, and the first rack is fixed to the inner side of the supporting carrier.

[0006] Furthermore, the upper end of the optical sensor is fixedly connected to a hinge shaft, and the hinge shaft is rotatably connected to a hinge seat installed at the bottom of the detection bracket. The end of the hinge shaft is also fixedly connected to a connecting rod, and an open groove is provided on the connecting rod along its length direction. A pin shaft is fitted in the open groove, and the pin shaft is also connected to a bracket. A second rack is fixed on the bracket, and 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.

[0007] Furthermore, a limiting plate is fixed on the inner side of the supporting carrier, a guide hole is opened on the limiting plate, a guide rod is fixed on the detection bracket, the guide rod slides through the guide hole and then connects to the end plate, and the elastic connecting device is installed between the end plate and the limiting plate.

[0008] Furthermore, the output end of the second motor is fixedly connected to a sleeve, the inner key of the sleeve is connected to 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.

[0009] Furthermore, 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.

[0010] Furthermore, 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.

[0011] Furthermore, 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.

[0012] The beneficial effects of the present invention are: The present invention discloses a bridge crack detection device, which can control the forward and backward movement of a support carrier by setting two sets of rollers, and the two sets of rollers are respectively connected to a first motor, and when there is a speed difference between the two sets of rollers, the support carrier can be controlled to turn. The above device can drive an optical sensor to perform all-round detection of cracks on the bridge surface, improve the detection efficiency of bridge cracks, and reduce the labor intensity of manual labor.

[0013] In a bridge crack detection device disclosed in the present invention, a cam plate is provided. When the cam plate rotates, in conjunction with an elastic connection device, it can drive a detection bracket and an optical sensor on the detection bracket to move back and forth in the radial direction, thereby enabling further detection of various radial positions, making the detection range more comprehensive.

[0014] The device of the present invention has a simple structure and can increase the detection accuracy by installing an optical sensor for small area detection, coordinating the planar movement of the support carrier and the radial reciprocating movement of the detection bracket, thereby improving the detection efficiency and accuracy.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 The structure of the device of the present invention is shown in FIG. Figure 1 ; Figure 2 The structure of the device of the present invention is shown in FIG. Figure 2 ; Figure 3 It is a schematic diagram of the internal structure of the device of the present invention; Figure 4 Schematic diagram of the structure of the detection component Figure 1 ; Figure 5 Schematic diagram of the structure of the detection component Figure 2 ; Figure 6 for Figure 5 The enlarged view of point A in the middle; Figure 7 A side view of the detection assembly.

[0017] The markings in the accompanying drawings are as follows: supporting carrier 1, mobile drive component 2, detection component 3, universal support wheel 4, roller 5, first motor 6, slide groove 7, detection plate 8, second motor 9, cam plate 10, push rod 11, detection bracket 12, optical sensor 13, cam groove 14, elastic connecting 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, opening groove 24, pin 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 DESCRIPTION

[0018] like Figures 1 to 7As shown, a bridge crack detection device disclosed in the present invention includes a support carrier 1, a mobile drive component 2 installed at the bottom of the support carrier 1, and a detection component 3. The support carrier 1 is circular as a whole, which can reduce the possibility of the support carrier 1 getting stuck with obstacles at the edge of the site when rotating. The mobile drive component 2 is used to drive the support carrier 1 to move, and the detection component 3 is used to detect cracks on the surface of the bridge when the support carrier 1 is moving. It can be understood that in order to increase the accuracy of the detection, a fill light can be installed at the bottom of the support carrier 1. In some other embodiments, the mobile drive component 2 can adopt existing technologies, such as tracks or drive wheels.

[0019] In the embodiment of the present invention, the mobile driving component 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 support carrier 1 and the center of the detection component 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 to the first motor 6; the first motor 6 adopts a servo motor, and the speed can be controlled separately by the controller. By setting two groups of rollers 5, the support carrier 1 can be controlled to move forward and backward. The two groups of rollers 5 are respectively connected to the first motor 6. When there is a speed difference between the two groups of rollers 5, the support carrier 1 can be controlled to turn. The above device can drive the optical sensor 13 to perform all-round detection of cracks on the surface of the bridge, improve the detection efficiency of bridge cracks, and reduce the labor intensity of manual labor.

[0020] Furthermore, a cavity is formed on the inner side of the support carrier 1 of the present invention, which can conveniently accommodate various parts. A slide groove 7 extending along the vertical direction is formed at the bottom of the support carrier 1. The detection component 3 includes a detection plate 8, a second motor 9, a cam plate 10, a push rod 11, a detection bracket 12, and an optical sensor 13. The detection bracket 12 is Z-shaped, and the detection plate 8 is a thin plate. The detection plate 8 is installed in the slide groove 7 and can be fixedly installed.

[0021] The second motor 9 also adopts a servo motor. The second motor 9 is fixed on the top of the supporting carrier 1. The output end of the second motor 9 is connected to the cam plate 10, which can drive the cam plate 10 to rotate around a vertical axis. A circumferentially closed cam groove 14 is provided on the cam plate 10. The cam groove 14 is in the shape of a hexagonal 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 slides with the detection plate 8 along the radial direction. An elastic connecting device 15 is arranged between the detection bracket 12 and the detection plate 8. A notch 16 corresponding to the detection bracket 12 is provided on the detection plate 8 to facilitate the optical sensor 13 to extend for detection. A number of optical sensors 13 are evenly installed at the bottom of the detection bracket 12. The optical sensor 13 can obtain the bridge crack image based on optical means.

[0022] In the embodiment of the present invention, the optical sensor 13 adopts the existing technology, and the optical sensor 13 receives the light reflected by the bridge, or emits light and receives the reflected light, so as to capture the image of the bridge surface. These lights can be visible light, infrared light or other light of specific wavelengths; then the collected image is analyzed and processed to extract the crack information on the bridge surface, so as to detect the cracks of the bridge.

[0023] In this embodiment, a cleaning brush 17 is provided at the bottom of the detection bracket 12 corresponding to the optical sensor 13. The cleaning brush 17 is fixedly connected to 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 to a first gear 19. Each first gear 19 is simultaneously meshed with a first rack 20. The first rack 20 is fixed to the inner side of the support carrier 1. When the detection bracket 12 moves in the radial direction, it can drive the first gear 19 to move together, so that the first gear 19 and the first rack 20 are relatively displaced. 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 of the detection. Through the coordination of the gear and rack, automatic cleaning can be achieved, which can reduce the power source, save energy, and make the control more convenient.

[0024] In this embodiment, the upper end of the optical sensor 13 is fixedly connected to a hinge shaft 21, which is rotatably connected to a hinge seat 22 installed at the bottom of the detection bracket 12. The end of the hinge shaft 21 is also fixedly connected to a connecting rod 23. The connecting rod 23 is provided with an open groove 24 along its length direction. A pin shaft 25 is fitted in the open groove 24. The pin shaft 25 is also connected to a bracket 26. A second rack 27 is fixed to the bracket 26. The second rack 27 is meshed with a second gear 28. A third motor 29 is fixed to the detection bracket 12, and the second gear 28 is connected to the output end of the third motor 29. Start the third motor 29, 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 move, the bracket 26 drives the connecting rod 23 to deflect through the pin 25, and the connecting rod 23 drives the optical sensor 13 to deflect through the hinge shaft 21, so that the optical sensor 13 can be biased to the side where the cleaning brush 17 is located, so that the detection head of the optical sensor 13 can be in contact with the cleaning brush 17, which is convenient for cleaning. When the third motor 29 rotates, the optical sensor 13 returns to its original position to prevent the cleaning brush 17 from affecting the detection head when the optical sensor 13 is in use. Of course, a reset torsion spring can be installed between the optical sensor 13 and the detection bracket 12. After the third motor 29 is unloaded, the reset torsion spring can drive the optical sensor 13 to return to the working position.

[0025] In this embodiment, a limit plate 30 is fixed on the inner side of the support carrier 1, a guide hole is opened on the limit 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 the end plate 32, an elastic connecting device 15 is installed between the end plate 32 and the limit plate 30, the elastic connecting device 15 adopts a spring, and the spring is sleeved on the outer side of the guide rod 31, which is used to provide elastic restoring force for the detection bracket 12, so that the detection bracket 12 can adapt to the rotation change of the cam groove 14 after the detection bracket 12 is displaced along the radial direction.

[0026] In this embodiment, the output end of the second motor 9 is fixedly connected to the sleeve 33, the inner key of the sleeve 33 is connected to the transmission shaft 34, the cam plate 10 is rotatably connected to the detection plate 8, and the second motor 9 is connected to the cam plate 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 plate 10.

[0027] In this embodiment, the detection plate 8 slides with the slide groove 7 along the vertical direction, the inner side of the slide groove 7 is integrally formed with a guide rail 35, the outer side of the detection plate 8 is formed with a guide groove 36 that cooperates with the guide rail 35, and a vertical displacement driving device for driving the displacement of the detection plate 8 is installed on the support carrier 1. When there is an obstacle, by setting the vertical displacement driving device, the detection plate 8 can be driven to move vertically, avoiding interference between the optical sensor 13 and the obstacle.

[0028] 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, the detection plate 8 can be driven to move downward. Even if the optical sensor 13 interferes with an obstacle, the airbag 37 can play a buffering role, thereby further protecting the optical sensor 13.

[0029] In this embodiment, a limit frame 40 is fixed on the detection plate 8. The limit frame 40 is installed on the outside of the airbag 37 to limit the airbag 37, thereby avoiding irregular expansion of the airbag 37 and making its expansion direction more controllable.

[0030] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. 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 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 support carrier, a mobile drive component and a detection component installed at the bottom of the support carrier, wherein the mobile drive component comprises a universal support wheel and two groups of rollers, wherein the universal support wheel is located on the same central axis connecting the support carrier and the center of the detection component, and 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 support carrier, and a slide groove extending along a vertical direction is formed at the bottom of the support carrier; the detection component comprises a detection plate, a second motor, a cam plate, a push rod, a detection bracket, and an optical sensor; the detection plate is installed in the slide groove, 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 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 detection bracket, the detection bracket slides with the detection plate along the radial direction, an elastic connection device is provided between the detection bracket and the detection plate, a notch corresponding to the detection bracket is provided on the detection plate, and a plurality of optical sensors are evenly installed at the bottom of the detection bracket, and the optical sensor can obtain a bridge crack image based on optical means.

2. A bridge crack detection device according to claim 1, characterized in that: A cleaning brush is provided at the bottom of the detection bracket corresponding to the optical sensor, and the cleaning brush is fixedly connected to a rotating shaft, the middle part of the rotating shaft is rotatably connected to the detection bracket, and the upper end of the rotating shaft is fixedly connected to a first gear, and each first gear is simultaneously meshed with a first rack, and the first rack is fixed on the inner side of the supporting carrier.

3. A bridge crack detection device according to claim 2, characterized in that: The upper end of the optical sensor is fixedly connected to a hinge shaft, and the hinge shaft is rotatably connected to a hinge seat installed at the bottom of the detection bracket. The end of the hinge shaft is also fixedly connected to a connecting rod, and an open groove is provided on the connecting rod along its length direction. A pin shaft is fitted in the open groove, and the pin shaft is also connected to a bracket. A second rack is fixed on the bracket, and 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.

4. A bridge crack detection device according to claim 1, characterized in that: 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 slides through the guide hole and then connects to the end plate, and the elastic connecting device is installed between the end plate and the limiting plate.

5. A bridge crack detection device according to any one of claims 1 to 4, 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.

6. A bridge crack detection device according to claim 5, 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.

7. A bridge crack detection device according to claim 6, 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.

8. A bridge crack detection device according to claim 7, 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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