Municipal bridge crack measuring device

Abstract

The invention belongs to the technical field of crack measurement, and provides a municipal bridge crack measuring device, which comprises a supporting assembly comprising a supporting seat, a supporting column mounted on the bottom surface of the supporting seat, universal wheels mounted below the supporting column, and a push frame fixed on the upper surface of the supporting seat; a through groove penetrates through the side wall of the supporting base, and a sliding groove communicating with the through groove is formed in an inner cavity of the supporting base. One side of the sliding groove communicates with a driving groove. The moving assembly comprises a lead screw, a sliding seat, a double-shaft motor and a gear set; the detection assembly comprises a first electric push rod, a rotating frame, a detection frame and a detection plate; by arranging the moving assembly, the rotating assembly, the winch and the like, flexible movement and angle adjustment of the detection assembly in the horizontal direction and the vertical direction are achieved, safety risks during high-altitude or bridge bottom detection are avoided, and meanwhile the detection range of the device is enlarged; and through a crack width compensation module, the accuracy of crack width and contour data is remarkably improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of crack measurement, and particularly relates to a municipal bridge crack measurement device. BACKGROUND

[0002] As an important infrastructure of urban traffic, the structural safety of a municipal bridge is directly related to the travel safety of the public and the stable development of the social economy. With the increase of the service life, the repeated action of the traffic load, the erosion of the natural environment and the aging of the material itself, various damages will inevitably occur in the bridge structure, and the crack is one of the most common and easily found diseases. If these cracks are not detected and treated in time, they may gradually expand, leading to the decrease of the bearing capacity of the bridge and even causing safety accidents. The traditional bridge crack detection method mainly relies on manual detection, and it is difficult to accurately measure the width and length of the cracks, especially for some hidden parts or high-altitude cracks, manual detection has a great safety hazard.

[0003] The current measurement method is to manually hold a laser scanner to collect crack data at a close distance. When detecting high-altitude or bridge bottom cracks, the personnel need to climb and hold the equipment manually, which has the hidden dangers of personnel falling and equipment damage. Moreover, the laser scanner is easily affected by the measurement distance, resulting in distorted data.

[0004] Therefore, the technical personnel in the field propose a municipal bridge crack measurement device to solve the problems in the background art. SUMMARY

[0005] In order to solve the above technical problems, the application provides a municipal bridge crack measurement device to solve the problems in the prior art, such as the need for manual climbing and holding equipment when collecting crack data at a close distance, detecting high-altitude or bridge bottom cracks, the hidden dangers of personnel falling and equipment damage, and the fact that the laser scanner is easily affected by the measurement distance, resulting in distorted data.

[0006] A municipal bridge crack measurement device comprises a support assembly, which comprises a support seat, a support column installed on the bottom surface of the support seat, a universal wheel installed below the support column, and a push frame fixed to the upper surface of the support seat; a through slot is formed in the side wall of the support seat, and a sliding slot is formed in the inner cavity of the support seat and communicates with the through slot; a driving slot is connected to one side of the sliding slot;

[0007] A moving assembly comprises a lead screw, a sliding seat, a double-shaft motor and a gear set; two groups of lead screws are symmetrically installed in the sliding slot, the lead screws are threadedly connected with the sliding seat, and the double-shaft motor drives the two groups of lead screws to rotate in the same direction through the gear set;

[0008] The utility model provides a detection assembly, it includes first electric push rod, rotary frame, detection frame and detection board, first electric push rod is rotatoryly installed between two groups of slide, the telescopic end of first electric push rod is connected with telescopic rod, one end of telescopic rod is fixedly connected rotary frame, the outer wall of rotary frame is installed with micro motor, the output of micro motor is connected detection frame, the inner wall of detection frame is installed with detection board, the end surface of detection board is integrated with laser scanner and laser ranging sensor.

[0009] Preferably, a rotating assembly is arranged between the two groups of slide blocks, the rotating assembly comprises a driving motor and a connecting shaft, the driving motor is installed in the inner cavity of the slide block, the output of the driving motor is fixedly connected with the shell of the first electric push rod, and the first electric push rod is rotatoryly connected with the connecting shaft and the other slide block.

[0010] Preferably, the gear set comprises a driving tooth and a driven tooth, a double-shaft motor is installed inside the driving groove, both outputs of the double-shaft motor are connected with the driving tooth, the driven tooth is installed on the periphery of the lead screw, and the driving tooth is engaged with the driven tooth.

[0011] Preferably, a winch is installed on the side wall of the support base, a winding disc is installed on the output of the winch, a connecting ring is fixedly connected to the upper surface of the first electric push rod, a pull rope is connected between the winding disc and the connecting ring, a guide hole is penetrated through the side wall of the push frame, and the pull rope penetrates through the guide hole.

[0012] Preferably, an adjusting groove is formed in the inner wall of the detection frame, the detection board is in sliding fit with the adjusting groove, a second electric push rod is installed on the outer wall of the detection frame, and the telescopic end of the second electric push rod is connected with the side wall of the detection board.

[0013] Preferably, a supporting plate is fixedly connected to the top surface of the first electric push rod, and the position of the supporting plate corresponds to the surface of the support base.

[0014] Preferably, a battery module and a control box are installed on the surface of the support base.

[0015] Preferably, the control box is internally provided with a crack width compensation module, the crack width compensation module sets a reference working distance d0 of the laser scanner; a vertical distance d between the detection board and a crack surface is acquired in real time through the laser ranging sensor; original crack width data w collected by the laser scanner is compensated according to the crack width compensation module 原始 Distance compensation is performed:

[0016]

[0017] The crack width value w after distance normalization is output 补偿 .

[0018] Preferably, the crack width compensation module carries out spatial transformation on the crack profile point cloud coordinates (x i , y i ) obtained by the laser scanner in proportion to the distance:

[0019]

[0020] A standardized crack three-dimensional model equivalent to the reference distance d0 is generated.

[0021] Compared with the prior art, the present application has the following beneficial effects:

[0022] The present application realizes the flexible movement and angle adjustment of the detection assembly in the horizontal and vertical directions by setting the moving assembly, rotating assembly and winch, replaces the manual handheld device operation, avoids the safety risk during high-altitude or bridge bottom detection, expands the detection range of the device, realizes the dynamic correction of the original measurement data of the laser scanner caused by the distance change through the crack width compensation module, reduces the measurement deviation caused by the spacing difference at the non-planar crack, and significantly improves the accuracy of the crack width and profile data. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application;

[0024] Figure 2 It is a schematic diagram of the structure of the second embodiment;

[0025] Figure 3 It is a schematic diagram of the front view structure of the second embodiment;

[0026] Figure 4 It is a schematic diagram of the A-A cross-sectional structure in the second embodiment; Figure 3

[0027] It is a schematic diagram of the cross-sectional structure of the measurement assembly; Figure 5

[0028] It is a schematic diagram of the right side of the second embodiment. Figure 6 In the drawings:

[0029]

[0030] ​1, support seat; 2, support column; 3, universal wheel; 4, push frame; 5, through slot; 6, sliding groove; 601, drive groove; 7, screw rod; 8, sliding seat; 9, double-shaft motor; 10, driving tooth; 11, driven tooth; 12, driving motor; 1201, connecting shaft; 13, first electric push rod; 14, telescopic rod; 15, rotating frame; 16, micro motor; 17, detection frame; 1701, adjusting groove; 18, second electric push rod; 19, detection plate; 20, laser scanner; 21, laser ranging sensor; 22, supporting plate; 23, support plate; 24, connecting ring; 25, guide hole; 26, winch; 27, winding disc; 28, pull rope; 29, battery module; 30, control box. DETAILED DESCRIPTION

[0031] The embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0032] Example 1: as shown in the accompanying drawings Figure 1 to the accompanying drawings Figure 6 As shown: the present application provides a kind of municipal bridge crack measuring device, including support assembly, moving assembly and detection component;

[0033] Support assembly includes support seat 1, support column 2 installed on the bottom surface of support seat 1, universal wheel 3 installed below support column 2, push frame 4 fixed to the upper surface of support seat 1;Through slot 5 is formed in the side wall of support seat 1, sliding groove 6 is formed in the inner cavity of support seat 1, and is communicated with through slot 5;Drive groove 601 is communicated with one side of sliding groove 6;

[0034] Moving assembly includes screw rod 7, sliding seat 8, double-shaft motor 9 and gear set;Two groups of screw rods 7 are symmetrically installed in sliding groove 6, screw rod 7 is threadedly connected with sliding seat 8, double-shaft motor 9 drives two groups of screw rods 7 to rotate in the same direction through gear set;Gear set includes driving tooth 10 and driven tooth 11, double-shaft motor 9 is installed in drive groove 601, both output ends of double-shaft motor 9 are connected with driving tooth 10, driven tooth 11 is installed on the side of screw rod 7, and driving tooth 10 is engaged with driven tooth 11;

[0035] Detection component includes first electric push rod 13, rotating frame 15, detection frame 17 and detection plate 19, first electric push rod 13 is rotatably installed between two groups of sliding seats 8, first electric push rod 13 is connected with telescopic rod 14 at telescopic end, one end of telescopic rod 14 is fixedly connected with rotating frame 15, micro motor 16 is installed on the outer wall of rotating frame 15, micro motor 16 is connected with detection frame 17 at output end, detection frame 17 is installed on the inner wall of detection plate 19, and laser scanner 20 and laser ranging sensor 21 are integrated on the end surface of detection plate 19;

[0036] The dual-axis motor 9 drives the two sets of active teeth 10 to rotate simultaneously, and the active teeth 10 drive the driven teeth 11 to rotate, thereby driving the two sets of lead screws 7 to rotate in the same direction at the same time, and the lead screws 7 drive the slide 8 to move along the slide groove 6; the two sets of slides 8 drive the first electric push rod 13 to move along the through groove 5, thereby driving the detection plate 19 to move along the crack to realize scanning and measurement of the crack; the micro motor 16 can drive the detection frame 17 to rotate, which is convenient for inspecting the bridge deck or beam body at non-planar locations.

[0037] An adjustment groove 1701 is provided on the inner wall of the detection frame 17, and the detection plate 19 slides in cooperation with the adjustment groove 1701. A second electric push rod 18 is installed on the outer wall of the detection frame 17, and the telescopic end of the second electric push rod 18 is connected to the side wall of the detection plate 19; the displacement of the detection plate 19 can be fine-tuned by the second electric push rod 18 to keep the distance between the detection plate 19 and the crack stable.

[0038] A rotating assembly is arranged between the two groups of slides 8, and the rotating assembly includes a drive motor 12 and a connecting shaft 1201. The drive motor 12 is installed in the inner cavity of the slide 8. The output end of the drive motor 12 is fixedly connected to the shell of the first electric push rod 13. The connecting shaft 1201 is rotatably installed between the first electric push rod 13 and the other slide 8.

[0039] A winch 26 is installed on the side wall of the support seat 1, and a winding drum 27 is installed on the output end of the winch 26. A connecting ring 24 is fixedly connected to the upper surface of the first electric push rod 13, and a pull rope 28 is connected between the winding drum 27 and the connecting ring 24. A guide hole 25 is passed through the side wall of the push frame 4, and the pull rope 28 passes through the guide hole 25.

[0040] When measuring the road surface, the first electric push rod 13 can be placed horizontally to quickly perform the test;

[0041] When it is necessary to detect a vertical wall, the first electric push rod 13 can be lifted and erected by driving the motor 12 in cooperation with the hoist 26, thereby realizing the function of detecting the wall.

[0042] A supporting plate 22 is fixedly connected to the bottom surface of the through slot 5, and the supporting plate 22 can support the first electric push rod 13 on the bottom surface of the through slot 5; a supporting plate 23 is fixedly connected to the top surface of the first electric push rod 13, and the position of the supporting plate 23 corresponds to the surface of the support seat 1; the first electric push rod 13 can be supported and limited by the supporting plate 23. After the first electric push rod 13 is lifted, it can be in a vertical state with the support seat 1 after being limited by the support plate 23, thereby ensuring stability during detection.

[0043] As can be seen from the above, first push the support base 1 through the push frame 4, and use the universal wheel 3 at the bottom of the support column 2 to move the device to the bridge crack detection area; the support base 1 stably supports the overall structure through the support column 2 to ensure that the device has no obvious shaking during the detection process.

[0044] The double-shaft motor 9 is started, and the output end drives the two groups of driving teeth 10 in the driving groove 601 to rotate synchronously; the driving teeth 10 are engaged with the driven teeth 11 on the side of the lead screw 7, so that the two groups of lead screws 7 in the sliding groove 6 are driven to rotate in the same direction. Since the lead screw 7 is in threaded connection with the sliding seat 8, the sliding seat 8 moves linearly along the sliding groove 6, and drives the detection assembly between the two groups of sliding seats 8 to move synchronously through the through groove 5, so that the detection plate 19 is scanned and covered along the length direction of the crack.

[0045] When detecting the road surface crack, the first electric push rod 13 is kept horizontally, and the supporting plate 22 supports the bottom of the first electric push rod 13; if the vertical wall crack is detected, the driving motor 12 of the rotating assembly is started, the output end of the driving motor 12 drives the first electric push rod 13 to rotate around the connecting shaft 1201 as the fulcrum, and the winch 26 drives the winding disc 27 to wind the pull rope 28, the pull rope 28 pulls the connecting ring 24 through the guide hole 25, and the first electric push rod 13 is lifted to the vertical state, at this time, the supporting plate 23 is in contact with the surface of the supporting seat 1 to limit, so that the detection assembly is stable.

[0046] The first electric push rod 13 is extended and retracted, the telescopic rod 14 drives the rotating frame 15 to move forward and backward, the initial distance between the detection plate 19 and the crack is adjusted, the micro motor 16 is started, the output end of the micro motor 16 drives the detection frame 17 to rotate, so that the detection plate 19 adapts to the inclination angle of the non-planar crack, the second electric push rod 18 drives the detection plate 19 to slide along the adjusting groove 1701, and the vertical distance between the detection plate 19 and the crack surface is further adjusted, so that the laser scanner 20 and the laser ranging sensor 21 are aligned with the crack area.

[0047] After the detection plate 19 is positioned, the laser scanner 20 starts to collect the profile data of the crack, the laser ranging sensor 21 synchronously acquires the real-time vertical distance between the detection plate 19 and the crack surface, and the data of the two is transmitted to the control terminal in real time, so that the preliminary collection of the basic crack parameters is completed.

[0048] The universal wheel 3 and the push frame 4 are arranged to realize flexible movement of the device, the detection assembly is driven to stably move along the crack in combination with the moving assembly, the scanning can be completed without manual holding of the equipment, and the climbing risk during high-altitude or bridge bottom detection is avoided.

[0049] In the detection assembly, the first electric push rod 13 and the telescopic rod 14 can adjust the detection distance, the micro motor 16 drives the detection frame 17 to rotate to adapt to the non-planar crack, the second electric push rod 18 adjusts the position of the detection plate 19 to ensure the measurement stability, the rotating assembly and the winch 26 are cooperated to realize the switching between the horizontal and vertical detection modes, and the application range and the operation safety of the device are greatly improved.

[0050] Example two: on the basis of example one, the surface of the support seat 1 is mounted with a battery module 29 and a control box 30; the control box 30 can control the double-shaft motor 9, the driving motor 12, the first electric push rod 13, the second electric push rod 18, the micro motor 16, the laser scanner 20 and the laser ranging sensor 21 and other equipment; the control box 30 controls the moving speed of the double-shaft motor 9, the rotation angle of the driving motor 12 and the winding and unwinding of the winch 26 through the built-in program, to ensure that the movement of the detection plate 19 matches the data acquisition in real time.

[0051] The control box 30 is built-in with a crack width compensation module, which sets the reference working distance d0 of the laser scanner 20; the vertical distance d between the detection plate 19 and the crack surface is obtained in real time through the laser ranging sensor 21; the original crack width data w collected by the laser scanner 20 is compensated by the crack width compensation module. 原始 Distance compensation is performed:

[0052]

[0053] The crack width value w after distance normalization is output 补偿 .

[0054] The crack profile point cloud coordinates (x i , y i ) obtained by the laser scanner 20 are spatially transformed in proportion to the distance by the crack width compensation module:

[0055]

[0056] A standardized crack three-dimensional model equivalent to the reference distance d0 is generated.

[0057] As can be seen from the above, the crack width compensation module built-in the control box 30 pre-calibrates the reference working distance d0 of the laser scanner 20 (for example, 500 mm, at which distance the measurement error of the laser scanner 20 after calibration is the smallest).

[0058] During the detection process, the laser ranging sensor 21 collects the vertical distance d between the detection plate 19 and the crack surface in real time (the range is usually 300-800 mm, which fluctuates due to the unevenness of the crack surface), and transmits the distance signal to the compensation module in the form of an electrical signal.

[0059] The original crack width w collected by the laser scanner 20 补偿 There is a proportional deviation due to the distance:

[0060] The compensation module is corrected by a correct formula:

[0061] If d0 = 500 mm, the actual width of a crack is 20 mm, and when d = 1000 mm, the original measurement value w of the laser scanner 20原始 = 10mm, w 补偿 = 10mm x 1000 / 500 = 20mm. The corrected data reduces the scaling error caused by distance difference, and restores the real width of the crack.

[0062] The crack profile point cloud coordinates (x i , y i ) obtained by the laser scanner 20 (unit: mm) are also affected by distance, and the compensation module performs spatial coordinate transformation according to the following formula:

[0063] When d0 = 500mm, d = 700mm, the original point cloud coordinates (120, 80) are transformed to (120 x 700 / 500 = 168, 80 x 700 / 500 = 112), which unifies the point cloud data at different distances to the reference distance scale, and the generated three-dimensional model effectively improves the fitting degree with the actual morphology of the crack.

[0064] The multi-component cooperative control control box 30 coordinates the linkage of each component through internal programs: the double-shaft motor 9 drives the sliding seat 8 to move along the sliding groove 6 at a speed of 0.1m / s, driving the detection plate 19 to scan along the length direction of the crack; the second electric push rod 18 adjusts the position of the detection plate 19 in the adjusting groove 1701 in real time according to the distance feedback of the laser ranging sensor 21, so that d is as close to d0 as possible, reducing the compensation amount;

[0065] When the micro motor 16 drives the detection frame 17 to rotate, the compensation module synchronously corrects the distance measurement deviation caused by the change of angle, ensuring that d is always a perpendicular distance;

[0066] The data transmission delay is controlled within 0.05s, ensuring that the compensation module updates parameters in real time and seamlessly synchronizes with the movement and rotation of the detection plate 19.

[0067] In the above manner, the device realizes high-precision measurement of the bridge crack width and profile, effectively reducing the data distortion problem caused by distance change of the laser scanner 20.

[0068] Through the crack width compensation module, the real-time distance data of the laser ranging sensor 21 is used to accurately correct the original width and point cloud coordinates of the laser scanner 20, reducing the measurement distortion problem caused by distance change; the standardized crack width data and three-dimensional model are more consistent with the actual morphology, providing a high-precision basis for bridge crack evaluation, while the cooperative control of the control box 30 on each component ensures the real-time of data acquisition and compensation, further improving the detection efficiency and result reliability.

[0069] In the drawings of the embodiments disclosed in the present invention, only the structures involved in the embodiments disclosed in the present invention are involved. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of the present invention can be combined with each other.

[0070] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A municipal bridge crack measurement device, characterized by: include: A support assembly comprises a support seat (1), a support column (2) mounted on the bottom surface of the support seat (1), a universal wheel (3) mounted below the support column (2), and a push frame (4) fixed to the upper surface of the support seat (1); a through groove (5) is passed through the side wall of the support seat (1), and a slide groove (6) communicating with the through groove (5) is provided in the inner cavity of the support seat (1); one side of the slide groove (6) is connected to a driving groove (601); A moving assembly comprises a screw rod (7), a slide seat (8), a dual-axis motor (9) and a gear set; two sets of screw rods (7) are symmetrically installed in the slide slot (6), the screw rods (7) are threadedly matched with the slide seat (8), and the dual-axis motor (9) drives the two sets of screw rods (7) to rotate in the same direction through the gear set; A detection assembly comprises a first electric push rod (13), a rotating frame (15), a detection frame (17) and a detection plate (19), wherein the first electric push rod (13) is rotatably installed between two groups of slide seats (8), the telescopic end of the first electric push rod (13) is connected to a telescopic rod (14), one end of the telescopic rod (14) is fixedly connected to the rotating frame (15), a micro motor (16) is installed on the outer wall of the rotating frame (15), the output end of the micro motor (16) is connected to the detection frame (17), the inner wall of the detection frame (17) is installed with a detection plate (19), and the end surface of the detection plate (19) is integrated with a laser scanner (20) and a laser ranging sensor (21).

2. A municipal bridge crack measuring device as claimed in claim 1, characterized in that: A rotating assembly is provided between the two groups of slides (8), and the rotating assembly includes a drive motor (12) and a connecting shaft (1201). The drive motor (12) is installed in the inner cavity of the slide (8), and the output end of the drive motor (12) is fixedly connected to the housing of the first electric push rod (13). The connecting shaft (1201) is rotatably installed between the first electric push rod (13) and the other slide (8).

3. A municipal bridge crack measuring device as claimed in claim 2, characterized in that: The gear set comprises a driving tooth (10) and a driven tooth (11); a dual-axis motor (9) is installed inside the driving slot (601); both output ends of the dual-axis motor (9) are connected to the driving tooth (10); a driven tooth (11) is installed on the circumference of the screw rod (7); and the driving tooth (10) is meshed with the driven tooth (11).

4. A municipal bridge crack measuring device as claimed in claim 3, characterized in that: A winch (26) is installed on the side wall of the support seat (1), and a winding disk (27) is installed on the output end of the winch (26). A connecting ring (24) is fixedly connected to the upper surface of the first electric push rod (13), and a pull rope (28) is connected between the winding disk (27) and the connecting ring (24). A guide hole (25) is passed through the side wall of the push frame (4), and the pull rope (28) passes through the guide hole (25).

5. The municipal bridge crack measuring device according to claim 1, characterized in that: An adjustment groove (1701) is provided on the inner wall of the detection frame (17), and the detection plate (19) is slidably matched with the adjustment groove (1701). A second electric push rod (18) is installed on the outer wall of the detection frame (17), and the telescopic end of the second electric push rod (18) is connected to the side wall of the detection plate (19).

6. A municipal bridge crack measuring device as claimed in claim 1, characterized in that: The bottom surface of the through slot (5) is fixedly connected to a supporting plate (22), and the top surface of the first electric push rod (13) is fixedly connected to a supporting plate (23), and the position of the supporting plate (23) corresponds to the surface of the support seat (1).

7. A municipal bridge crack measuring device as claimed in claim 1, characterized in that: A battery module (29) and a control box (30) are mounted on the surface of the support base (1).

8. A municipal bridge crack measuring device as claimed in claim 7, characterized in that: The control box (30) has a built-in crack width compensation module, which sets the reference working distance d0 of the laser scanner (20); obtains the vertical distance d between the detection plate (19) and the crack surface in real time through the laser distance sensor (21); and calculates the original crack width data w collected by the laser scanner (20). 原始 To perform distance compensation: Output the distance-normalized crack width value w 补偿 .

9. A municipal bridge crack measuring device as claimed in claim 8, characterized in that: The crack width compensation module converts the crack contour point cloud coordinates (x i ,y i ) Perform spatial transformation based on distance ratio: Generate a standardized three-dimensional crack model equivalent to the reference distance d0.

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