Improved pavement crack depth measurement device for road and bridge detection

Abstract

The utility model relates to the technical field of road and bridge detection, in particular to an improved pavement crack depth measurement device for road and bridge detection, which comprises a frame, a mounting plate is fixed on the surface of the frame, a measuring instrument is fixed at the top of the mounting plate, self-locking universal wheels are fixed at the bottom of the frame, and the self-locking universal wheels are fixed at the bottom of the frame. A multidirectional adjusting mechanism is mounted at the bottom of the mounting plate, a bidirectional adjusting mechanism is arranged on the surface of the multidirectional adjusting mechanism, an independent adjusting mechanism is arranged on the surface of the bidirectional adjusting mechanism, a transducer is arranged on the surface of the independent adjusting mechanism, and a controller is fixed on the surface of the mounting plate; the multi-direction adjusting mechanism comprises an extending block, the extending block is fixed to the bottom of the mounting plate, and an electric push rod is fixed to the surface of the extending block. High-precision measurement of the crack depth is achieved through cooperative work of the multi-directional adjusting mechanism, the bidirectional adjusting mechanism and the independent adjusting mechanism, and the problems that a transducer of a traditional device is inconvenient to adjust, and the device needs to be moved frequently are solved.

Description

Technical Field

[0001] This utility model relates to the field of road and bridge inspection technology, specifically to an improved device for measuring the depth of road surface cracks in road and bridge inspection. Background Technology

[0002] Currently, bridges and roads in cities are paved with asphalt. Due to traffic loads and natural factors, pit-like cracks can appear on the asphalt pavement. Some cracks are quite deep, and if they are not repaired in time, they will cause further damage to the asphalt pavement and affect driving safety. Therefore, it is necessary to use measuring devices to measure the depth of cracks in the pavement.

[0003] Utility model patent CN218492227U discloses a pavement crack depth measuring device for road and bridge inspection, including a fixed plate. A protective mechanism is fixedly connected to the lower center of the fixed plate. An adjusting mechanism is movably connected to the right center of the protective mechanism, and the adjusting mechanism is located inside the protective mechanism. Support feet are fixedly connected to the four corners of the lower end of the fixed plate. A universal wheel with brake is movably connected to the lower center of each of the four support feet via bearings. A measuring instrument is fixedly connected to the upper center of the fixed plate. A protective cover is fixedly connected between the upper left and upper right parts of the fixed plate. This pavement crack depth measuring device for road and bridge inspection, by setting up a protective mechanism, can protect the transducer. By setting up an adjusting mechanism, the position of the transducer can be easily adjusted, improving the accuracy of the measurement data, making it suitable for widespread use.

[0004] However, the aforementioned road crack depth measuring device can only adjust the spacing of the transducers and cannot quickly adjust the position of the transducers according to the location of the crack. The operator needs to frequently move the entire device or even rotate the device to align it with the crack, resulting in high labor intensity, low operating efficiency and easy accumulation of errors. Utility Model Content

[0005] To overcome the shortcomings of existing technologies, this utility model proposes an improved device for measuring the depth of road surface cracks in road and bridge inspection. Through the coordinated work of a multi-directional adjustment mechanism, a bi-directional adjustment mechanism, and an independent adjustment mechanism, it achieves high-precision measurement of crack depth, solving the problem of inconvenient transducer adjustment and the need for frequent device movement in traditional devices.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] An improved device for measuring the depth of road surface cracks in road and bridge inspection includes a frame, a mounting plate fixed to the surface of the frame, a measuring instrument fixed to the top of the mounting plate, self-locking casters fixed to the bottom of the frame, a multi-directional adjustment mechanism installed at the bottom of the mounting plate, a bi-directional adjustment mechanism provided on the surface of the multi-directional adjustment mechanism, an independent adjustment mechanism provided on the surface of the bi-directional adjustment mechanism, a transducer provided on the surface of the independent adjustment mechanism, and a controller fixed to the surface of the mounting plate.

[0008] The multi-directional adjustment mechanism includes an extension block, which is fixed to the bottom of the mounting plate. An electric push rod is fixed to the surface of the extension block. One end of the electric push rod passes through the extension block and is fixed to a sliding table. An electric rotary table is fixed to the surface of the sliding table.

[0009] The bidirectional adjustment mechanism includes an adjustment shell, the top of which is fixedly connected to the surface of an electric rotary table. A bidirectional lead screw is rotatably connected to the inner wall of the adjustment shell. A handwheel that passes through the adjustment shell is fixed to one end of the bidirectional lead screw. Two double sliding sleeves are threadedly connected to the surface of the bidirectional lead screw, and a combination plate is fixed to the bottom of the double sliding sleeves.

[0010] Preferably, a first guide rail is fixed to the surface of the mounting plate, and two first sliders are slidably connected to the surface of the first guide rail. The bottom of the first slider is fixedly connected to the top of the sliding table. A second guide rail is fixed to the surface of the sliding table, and a second slider is slidably connected to the surface of the second guide rail. The bottom of the second slider is fixedly connected to the top of the adjusting shell.

[0011] Preferably, the independent adjustment mechanism includes two support plates, the support plates are fixedly connected to the bottom of the combined plate, an adjustment plate slides through the surface of the support plate, an L-shaped plate is fixed to the surface of the adjustment plate, and the bottom of the L-shaped plate is fixedly connected to the surface of the transducer.

[0012] Preferably, the L-shaped plate has a groove on its surface, and the support plate is slidably connected to the surface of the groove.

[0013] Preferably, a movable block is slidably connected to the surface of the groove, and a baffle is fixed to the bottom of the movable block.

[0014] Preferably, an extension frame is fixed to the surface of the support plate, a pin slides through the surface of the extension frame, a movable block is fixed to the surface of the pin, a spring is fixed to the surface of the movable block, one end of the spring is fixedly connected to the inner wall of the extension frame, the pin slides through the support plate, and the surface of the adjustment plate has multiple pin holes for inserting the mating pin.

[0015] Preferably, a guide rod is fixed to the inner wall of the adjusting shell, and the surface of the guide rod is slidably connected to the surface of the double sliding sleeve.

[0016] Compared with the prior art, the advantages of this improved device for measuring the depth of road surface cracks in road and bridge inspection are:

[0017] First, the multi-directional adjustment mechanism drives the sliding table to move horizontally along the first guide rail via an electric push rod. Combined with the rotation function of the electric rotary table, it achieves coarse positioning and angle adaptation of the transducer, greatly reducing the labor intensity of repeated manual handling of the equipment. The bidirectional adjustment mechanism adopts a symmetrical drive design with bidirectional screws, which allows the distance between the two transducers to be adjusted symmetrically, adapting to dynamic detection scenarios such as bridges and highways, and significantly improving detection efficiency.

[0018] Secondly, the independent adjustment mechanism allows for independent fine-tuning of the transducer by sliding the adjustment plate back and forth along the support plate, accurately matching the local morphology of the crack and solving the signal distortion problem caused by the fixed position of traditional devices. The sliding design of the slide and the moving block allows the baffle to flexibly cover the transducer, effectively protecting the transducer and making it less prone to damage when not in use, thus enhancing the technical extensibility and scene adaptability. Attached Figure Description

[0019] Figure 1 A three-dimensional structural schematic diagram of the improved road surface crack depth measurement device for road and bridge inspection, from perspective one;

[0020] Figure 2 This is a two-dimensional structural schematic diagram of the improved road surface crack depth measurement device for road and bridge inspection according to this utility model;

[0021] Figure 3 This is a schematic diagram of the multi-directional adjustment mechanism in this utility model;

[0022] Figure 4 This is a cross-sectional structural diagram of the bidirectional adjustment mechanism in this utility model;

[0023] Figure 5 This is a schematic diagram of the disassembled structure of the independent mechanism in this utility model.

[0024] The components include: 1. Frame; 2. Mounting plate; 3. Measuring instrument; 4. Self-locking caster wheel; 5. Multi-directional adjustment mechanism; 501. Extension block; 502. Electric push rod; 503. Sliding table; 504. Electric rotary table; 505. First guide rail; 506. Second guide rail; 507. First slider; 508. Second slider; 6. Bidirectional adjustment mechanism; 601. Adjustment shell; 602. Bidirectional lead screw; 603. Double sliding sleeve; 604. Combination plate; 605. Guide rod; 7. Independent adjustment mechanism; 701. Support plate; 702. Adjustment plate; 703. L-shaped plate; 704. Slide groove; 705. Extension frame; 706. Pin rod; 707. Movable block; 708. Spring; 709. Pin hole; 8. Transducer; 9. Moving block; 10. Baffle; 11. Controller. Detailed Implementation

[0025] The specific embodiments of this utility model will now be described in further detail with reference to the accompanying drawings.

[0026] Please refer to the improved pavement crack depth measurement device for road and bridge inspection described in this specific embodiment. Figure 1 — Figure 5 The system includes a frame 1, a mounting plate 2 fixed to the surface of the frame 1, a measuring instrument 3 fixed to the top of the mounting plate 2, a self-locking universal wheel 4 fixed to the bottom of the frame 1, a multi-directional adjustment mechanism 5 installed at the bottom of the mounting plate 2, a bi-directional adjustment mechanism 6 provided on the surface of the multi-directional adjustment mechanism 5, an independent adjustment mechanism 7 provided on the surface of the bi-directional adjustment mechanism 6, a transducer 8 provided on the surface of the independent adjustment mechanism 7, and a controller 11 fixed to the surface of the mounting plate 2.

[0027] The multi-directional adjustment mechanism 5 includes an extension block 501, which is fixed to the bottom of the mounting plate 2. An electric push rod 502 is fixed on the surface of the extension block 501. One end of the electric push rod 502 passes through the extension block 501 and is fixed with a sliding table 503. An electric rotary table 504 is fixed on the surface of the sliding table 503.

[0028] The bidirectional adjustment mechanism 6 includes an adjustment housing 601. The top of the adjustment housing 601 is fixedly connected to the surface of the electric rotary table 504. A bidirectional lead screw 602 is rotatably connected to the inner wall of the adjustment housing 601. A handwheel that passes through the adjustment housing 601 is fixed to one end of the bidirectional lead screw 602. Two double sliding sleeves 603 are threadedly connected to the surface of the bidirectional lead screw 602. A combination plate 604 is fixed to the bottom of the double sliding sleeves 603. A through groove is opened at the bottom of the adjustment housing 601. The surface of the combination plate 604 is slidably connected to the surface of the through groove.

[0029] Through the above technical solution, rotating the handwheel can rotate the bidirectional lead screw 602, allowing the double sliding sleeve 603 to move in opposite directions due to the influence of the thread, driving the combined plate 604 to slide on the surface of the through groove, thereby changing the distance between the transducers 8 on both sides and realizing the initial position adjustment of the transducers 8. The frame 1, as the main body of the device, can move and be fixed flexibly through the self-locking universal wheels 4. The mounting plate 2 integrates the measuring instrument 3 and the controller 11 to form the core control unit. The electric push rod 502 drives the sliding table 503 to move horizontally, driving the adjustment shell 601 and the transducer 8 to move as a whole. The electric rotary table 504 can make the adjustment shell 601 drive the transducer 8 to rotate around the vertical axis, realizing the angular rotation of the transducer 8, greatly reducing the labor intensity of repeated manual handling of equipment, and significantly improving the adaptability to the macroscopic direction of cracks, realizing the orientation adaptation of multiple transducers 8.

[0030] The mounting plate 2 has a first guide rail 505 fixed on its surface. Two first sliders 507 are slidably connected to the surface of the first guide rail 505. The bottom of the first slider 507 is fixedly connected to the top of the sliding table 503. The sliding table 503 has a second guide rail 506 fixed on its surface. The second guide rail 506 has a ring structure design. A second slider 508 is slidably connected to the surface of the second guide rail 506. The bottom of the second slider 508 is fixedly connected to the top of the adjusting shell 601.

[0031] With the above technical solution, when the electric push rod 502 pushes the sliding table 503 to move, the first slider 507 will slide on the surface of the first guide rail 505. This can improve the stability of the sliding table 503 when it moves and avoid deviation. When the electric rotary table 504 drives the adjusting shell 601 to rotate, the second slider 508 will also slide along the adjusting shell 601 on the surface of the second guide rail 506. This helps to improve the center stability of the adjusting shell 601 when it rotates, reduce the occurrence of shaking, and improve the rotation accuracy.

[0032] The independent adjustment mechanism 7 includes two support plates 701. The support plates 701 are fixedly connected to the bottom of the combined plate 604. An adjustment plate 702 slides through the surface of the support plate 701. An L-shaped plate 703 is fixed to the surface of the adjustment plate 702. The bottom of the L-shaped plate 703 is fixedly connected to the surface of the transducer 8.

[0033] Through the above technical solution, the adjustment plate 702 can slide along the inside of the support plate 701, driving the L-shaped plate 703 and the transducer 8 to move back and forth, realizing independent fine adjustment of the front and back positions of the transducer 8, and better matching the local direction of the crack.

[0034] The L-shaped plate 703 has a groove 704 on its surface, and the support plate 701 is slidably connected to the surface of the groove 704.

[0035] With the above technical solution, when the L-shaped plate 703 is in motion, the support plate 701 will slide on the surface of the groove 704, so that the L-shaped plate 703 can obtain a further horizontal guiding effect, reduce the occurrence of offset, and provide a supporting effect for the L-shaped plate 703.

[0036] A movable block 9 is slidably connected to the surface of the slide 704, and a baffle 10 is fixed to the bottom of the movable block 9.

[0037] With the above technical solution, when the transducer 8 is not in use, the moving block 9 can be installed on the surface of the L-shaped plate 703 through the sliding groove 704, so that the baffle 10 can shield and protect the transducer 8, making the transducer 8 less susceptible to collision damage.

[0038] An extension frame 705 is fixed to the surface of the support plate 701. A pin 706 slides through the surface of the extension frame 705. A movable block 707 is fixed to the surface of the pin 706. A spring 708 is fixed to the surface of the movable block 707. One end of the spring 708 is fixedly connected to the inner wall of the extension frame 705. The pin 706 slides through the surface of the support plate 701. A plurality of pin holes 709 are opened on the surface of the adjusting plate 702 to accommodate the insertion of the pin 706. A pull plate is fixed to one end of the pin 706.

[0039] With the above technical solution, under normal circumstances, the pin 706 will be located inside the pin hole 709, so that the adjusting plate 702 can be limited and the transducer 8 can be prevented from being displaced. When the position of one side of the transducer 8 needs to be finely adjusted, pulling the pull plate can drive both pins 706 to disengage from the pin hole 709 at the same time. At this time, the spring 708 is compressed, and the limiting effect on the adjusting plate 702 is released, so that the adjusting plate 702 can move freely.

[0040] A guide rod 605 is fixed to the inner wall of the adjusting shell 601, and the surface of the guide rod 605 is slidably connected to the surface of the double sliding sleeve 603.

[0041] Through the above technical solution, the double sliding sleeve 603 can slide on the surface of the guide rod 605, avoiding the situation where the bidirectional lead screw 602 drives the double sliding sleeve 603 to rotate.

[0042] The controller 11 is electrically connected to the measuring instrument 3, the transducer 8, the electric push rod 502, and the electric rotary table 504.

[0043] Its working principle is as follows: During operation, the operator first moves the device to the crack area to be tested using the self-locking universal wheels 4. The controller 11 activates the electric push rod 502 to drive the sliding table 503 to move horizontally along the first guide rail 505, so that the transducer 8 is initially aligned with the crack. The electric rotary table 504 rotates the adjustment shell 601 to be perpendicular to the crack direction. Then, the handwheel is turned to drive the bidirectional lead screw 602 to rotate, and the double sliding sleeve 603 slides along the surface of the guide rod 605, driving the combination plate 604 and the transducer 8 to adjust the spacing symmetrically, ensuring that the ultrasonic emission and reception paths symmetrically cover the crack area. If it is necessary to further adapt to the local crack morphology, the pin rod 706 can be pulled out to unlock it, and the sliding adjustment plate 702 moves back and forth along the support plate 701 to fine-tune the front and back positions of the transducer 8 on one side. During the measurement process, the measuring instrument 3 collects ultrasonic echo signals through the controller 11 and calculates the crack depth. Combined with the above operations, the device can finally complete high-reliability testing under complex road conditions.

[0044] It should be noted that, although specific embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these specific embodiments without departing from the principles and spirit, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An improved device for measuring the depth of road surface cracks in road and bridge inspection, characterized in that: The system includes a frame (1), a mounting plate (2) fixed to the surface of the frame (1), a measuring instrument (3) fixed to the top of the mounting plate (2), a self-locking universal wheel (4) fixed to the bottom of the frame (1), a multi-directional adjustment mechanism (5) installed at the bottom of the mounting plate (2), a bi-directional adjustment mechanism (6) provided on the surface of the multi-directional adjustment mechanism (5), an independent adjustment mechanism (7) provided on the surface of the bi-directional adjustment mechanism (6), a transducer (8) provided on the surface of the independent adjustment mechanism (7), and a controller (11) fixed to the surface of the mounting plate (2). The multi-directional adjustment mechanism (5) includes an extension block (501), which is fixed to the bottom of the mounting plate (2). An electric push rod (502) is fixed on the surface of the extension block (501). One end of the electric push rod (502) passes through the extension block (501) and is fixed with a sliding table (503). An electric rotary table (504) is fixed on the surface of the sliding table (503). The bidirectional adjustment mechanism (6) includes an adjustment shell (601), the top of which is fixedly connected to the surface of an electric rotary table (504), and a bidirectional lead screw (602) is rotatably connected to the inner wall of the adjustment shell (601). A handwheel that passes through the adjustment shell (601) is fixed at one end of the bidirectional lead screw (602), and two double sliding sleeves (603) are threadedly connected to the surface of the bidirectional lead screw (602). A combination plate (604) is fixed at the bottom of the double sliding sleeves (603).

2. The improved device for measuring the depth of road surface cracks for bridge and road inspection according to claim 1, characterized in that: The mounting plate (2) is fixed with a first guide rail (505), and two first sliders (507) are slidably connected to the surface of the first guide rail (505). The bottom of the first slider (507) is fixedly connected to the top of the sliding table (503). The sliding table (503) is fixed with a second guide rail (506), and a second slider (508) is slidably connected to the surface of the second guide rail (506). The bottom of the second slider (508) is fixedly connected to the top of the adjusting shell (601).

3. The improved device for measuring the depth of road surface cracks for road and bridge inspection according to claim 1, characterized in that: The independent adjustment mechanism (7) includes two support plates (701), the support plates (701) are fixedly connected to the bottom of the combination plate (604), the surface of the support plates (701) is slidably penetrated by an adjustment plate (702), the surface of the adjustment plate (702) is fixedly fitted with an L-shaped plate (703), and the bottom of the L-shaped plate (703) is fixedly connected to the surface of the transducer (8).

4. An improved device for measuring the depth of road surface cracks for bridge and road inspection according to claim 3, characterized in that: The L-shaped plate (703) has a groove (704) on its surface, and the support plate (701) is slidably connected to the surface of the groove (704).

5. An improved device for measuring the depth of road surface cracks for bridge and road inspection according to claim 4, characterized in that: A movable block (9) is slidably connected to the surface of the slide (704), and a baffle (10) is fixed to the bottom of the movable block (9).

6. An improved device for measuring the depth of road surface cracks for bridge and road inspection according to claim 3, characterized in that: An extension frame (705) is fixed to the surface of the support plate (701). A pin (706) slides through the surface of the extension frame (705). A movable block (707) is fixed to the surface of the pin (706). A spring (708) is fixed to the surface of the movable block (707). One end of the spring (708) is fixedly connected to the inner wall of the extension frame (705). The pin (706) slides through the support plate (701). A plurality of pin holes (709) are opened on the surface of the adjusting plate (702) for inserting the pin (706).

7. An improved device for measuring the depth of road surface cracks for road and bridge inspection according to claim 1, characterized in that: A guide rod (605) is fixed to the inner wall of the adjusting shell (601), and the surface of the guide rod (605) is slidably connected to the surface of the double sliding sleeve (603).

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