Crack detection device for expressway and detection method thereof

Abstract

The invention belongs to the technical field of expressway crack detection, and discloses an expressway crack detection device and a detection method thereof.The expressway crack detection device comprises a device body, a sound wave detector host and a control box are fixedly connected to the top of the device body, and the sound wave detector host is connected with a pair of transducer probes through data lines; according to the device, through cooperation of the transverse position adjusting assembly, the scale plate and other structures, the measurement distance can be conveniently controlled, through arrangement of the adjusting mechanism, a sliding block on a linear guide rail drives a warped plate to move, the warped plate pulls a fixing frame to drive a transducer probe to move synchronously, the measurement distance is adjusted, and the measurement precision is improved. Through cooperation of the adjusting mechanism, the coupling agent supplementing assembly and other structures, the coupling agent can be supplemented in time, and the first telescopic rod pushes the limiting sleeve to drive the push rod to move up and down.

Description

Technical Field

[0001] The invention belongs to the technical field of highway crack detection, and in particular is a highway crack detection device and a detection method thereof. Background Art

[0002] Highway crack detection is an important part of ensuring highway safety, extending service life and reducing maintenance costs. Through regular crack detection, road surface problems can be discovered and dealt with in a timely manner to prevent the problems from further deteriorating, thereby reducing repair and maintenance costs. After regular inspections of the road surface through drone inspections, cracks need to be repaired in a timely manner. Before repairing, a series of tests are required to confirm the size, depth, type and other contents of the cracks.

[0003] When detecting the depth of cracks, the acoustic wave detection method is often used to measure the depth of the cracks by the propagation characteristics of the acoustic wave. Traditional acoustic wave detection requires manual marking of multiple points along the cracks and the use of tools to draw measurement point marks at the cracks. This is not only cumbersome but also requires workers to crouch frequently and manually replenish coupling agents, which is inefficient and slows down the progress of the project. However, the time for highway construction is very tight and it needs to be open to traffic as soon as possible. Therefore, a crack detection device and a detection method for highways are proposed. Summary of the invention

[0004] In order to solve the problem of low efficiency of manual detection mentioned in the above background technology, the present invention provides a crack detection device and a detection method for a highway.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a crack detection device for highways, comprising a device body, a mainframe of an acoustic wave detector and a control box are fixedly connected to the top of the device body, a pair of transducer probes are connected to the mainframe of the acoustic wave detector via a data line, an adjustment mechanism is arranged at one end of the device body, a coupling agent supplement component is arranged at the bottom of the adjustment mechanism, a positioning mechanism is fixedly connected to the middle of the device body, a camera is fixedly connected to the top of the device body, and a data transmitter is fixedly connected to the top of the mainframe of the acoustic wave detector;

[0006] Among them, the adjustment mechanism includes a lateral adjustment component and a first telescopic rod, the output end of the first telescopic rod is fixedly connected to a limiting sleeve, the middle part of the limiting sleeve is slidably connected to a push rod, both ends of the push rod are respectively slidably connected to a rocker, and the end of the rocker away from the push rod is hinged to a fixed frame.

[0007] Preferably, the lateral positioning assembly comprises a pair of linear guide rails, a slider is slidably connected inside the linear guide rails, a support frame is fixedly connected to the side of the slider, and a rotating shaft is fixedly connected to the top of the slider;

[0008] The linear guide is located at the top of the device body and is fixedly connected to the device body, the support frame passes through the device body and extends to the lower side of the device body, the rotating shaft is slidably connected to the middle part of the rocker, the first telescopic rod is fixedly connected to the device body, and the lower end of the fixed frame is fixedly connected to the transducer probe.

[0009] Preferably, the coupling agent supplement component comprises a pair of sliding brackets, a second telescopic rod is arranged inside the sliding bracket, a push plate is fixedly connected to the output end of the second telescopic rod, and a coupling agent box is placed inside the sliding bracket;

[0010] The sliding bracket is located at the bottom of the slider and is slidably connected to the slider, the sliding bracket is in contact with the transducer probe, one end of the second telescopic rod is fixedly connected to the slider, the push plate is slidably connected inside the sliding bracket and is in contact with the coupling agent box, and the discharge port of the coupling agent box faces upward.

[0011] Preferably, the positioning mechanism comprises a supporting shell, a scale plate is rotatably connected to the top of the supporting shell, a first limiting frame and a second limiting frame are slidably connected inside the supporting shell, and a synchronization component is arranged in the middle of the supporting shell.

[0012] Preferably, the supporting shell is fixedly connected to the middle part of the device body, the scale plate faces the side of the supporting shell close to the adjustment mechanism, the first limiting frame and the second limiting frame are both provided with limiting rings on the same side, the limiting rings are slidably connected to the transducer probe, the first limiting frame and the second limiting frame are slidably connected, and the first limiting frame and the first limiting frame are both provided with teeth on one side located inside the supporting shell and facing opposite directions.

[0013] Preferably, the synchronization component includes a first gear and a second gear, a pair of limiting sliding grooves are opened inside the first gear, a locking rod is slidably connected inside the first gear and the second gear, a lifting cap is rotatably connected to the top of the locking rod, and a locking protrusion is arranged in the middle of the second gear.

[0014] Preferably, the first gear is located on the upper side of the second gear and in the middle of the supporting shell, the first gear and the second gear are both rotatably connected to the supporting shell, an arc-shaped protrusion block matching the limiting slide groove is provided in the middle of the locking rod, the arc-shaped protrusion block is slidably connected inside the limiting slide groove, a locking groove matching the locking protrusion is provided at the bottom of the locking rod, the lifting cap penetrates the supporting shell and extends to the top of the supporting shell, and the top of the lifting cap is rotatably connected to the middle of the scale plate.

[0015] Preferably, the first gear is meshedly connected with the first limit frame, and the second gear is meshedly connected with the second limit frame. When the scale plate flips, the lifting cap moves upward with the scale plate, so that the lifting cap pulls the locking rod to move upward, so that the bottom of the locking rod is released from the locking protrusion.

[0016] Preferably, the camera is located in the middle of the device body, and the camera is facing the middle of the positioning mechanism scale, and the data transmitter transmits the data of the sound wave detector host to the external computer through the network.

[0017] A method for detecting cracks in a highway comprises the following steps:

[0018] S1. Use an external computer to control the main unit of the acoustic wave detector to set the detection interval and the detection point coordinates, and then move the device body to the detection point, and make the crack, the middle of the scale plate and the camera in the same vertical line;

[0019] S2, perform cross-gap detection, the slider drives the transducer probe to move to the detection position on both sides through the seesaw and the fixed frame, and then the second telescopic rod pushes the push plate to squeeze the coupling agent box to move, so that the coupling agent box drives the sliding bracket to move to contact with the transducer probe, and then the second telescopic rod continues to push the coupling agent box to squeeze and apply the coupling agent to the bottom of the transducer probe, and then the sliding bracket drives the push plate and the sliding bracket to retract, and the first telescopic rod pushes the push rod to move upward through the limit sleeve, so that the push rod pushes the seesaw to flip with the rotating shaft as the axis, so that the transducer probe moves downward to contact with the road surface for detection, pull up the transducer probe, and move the slider to both sides by equal distances for detection, and obtain the cross-gap detection data;

[0020] S3, perform non-slit-crossing detection, reset the transducer probe, and then flip the scale plate, pull the lifting cap upward with the scale plate, so that the lifting cap pulls the locking rod to slide along the limiting slide groove, so that the bottom of the locking rod and the locking protrusion are released from the locking, so that the first gear and the second gear are released from synchronous rotation, and then the device body is moved to the detection point. At this time, the slider on one side is controlled to move, and the slider on the other side remains stationary, and the moving distance of the slider on the moving side is increased by equal distances step by step to obtain the data of non-slit-crossing detection;

[0021] S4. Compare and analyze the data of cross-crack detection and non-cross-crack detection, and calculate the depth of the crack using relevant formulas or software in combination with parameters such as probe spacing.

[0022] Compared with the prior art, the present invention has the following beneficial effects:

[0023] The present invention facilitates the control of the measurement interval by arranging the cooperation of structures such as the lateral adjustment component and the scale plate, and by arranging the adjustment mechanism, the slider on the linear guide rail drives the seesaw to move, so that the seesaw pulls the fixed frame to drive the transducer probe to move synchronously, so as to adjust the lateral position of the transducer probe, thereby controlling the lateral movement interval to be equal during detection, and recording the probe spacing parameters in real time through the camera and the scale plate, thereby saving the time of manually drawing the measurement line and greatly improving the detection efficiency;

[0024] The present invention facilitates timely replenishment of the coupling agent by arranging the coordination of the adjustment mechanism and the coupling agent replenishment assembly and other structures. The first telescopic rod pushes the limiting sleeve to drive the push rod to move up and down, and the up and down movement of the transducer probe is controlled in the form of a lever. Then, the second telescopic rod pushes the coupling agent box to move to the bottom of the transducer probe through the push plate. At the same time, the sliding bracket contacts the transducer probe. At this time, the second telescopic rod pushes and squeezes the coupling agent box, so that the coupling agent inside the coupling agent box is squeezed out and applied to the bottom of the transducer probe, so that the coupling agent is replenished, the manual application step is saved, and the work efficiency is further improved.

[0025] The present invention switches the detection mode by setting up the coordination of structures such as the positioning mechanism and the synchronization component. The lifting cap is driven to move upward by flipping the scale plate, so that the lifting cap pulls the locking rod to move upward, so that the bottom of the locking rod and the locking protrusion are released from the locking, so that the first gear and the second gear are released from synchronous rotation, so that a pair of transducer probes can be moved separately, so as to edit the switching detection mode and collect data. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 It is an enlarged cross-sectional view of the adjustment mechanism of the present invention;

[0028] Figure 3 It is a cross-sectional view of the coupling agent supplement component of the present invention;

[0029] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 It is a cross-sectional schematic diagram of the positioning mechanism of the present invention;

[0031] Figure 6 This is a schematic diagram of the overall disassembly of the positioning mechanism of the present invention;

[0032] Figure 7 for Figure 6 The enlarged schematic diagram of point B in the middle;

[0033] Figure 8This is an enlarged cross-sectional view of the middle portion of the positioning synchronization component of the present invention.

[0034] In the figure: 1. device body; 2. main unit of the acoustic wave detector; 3. control box; 4. transducer probe; 5. adjustment mechanism; 51. lateral adjustment assembly; 511. linear guide rail; 512. slider; 513. support frame; 514. rotating shaft; 52. first telescopic rod; 53. limiting sleeve; 54. push rod; 55. seesaw; 56. fixed frame; 6. coupling agent replenishing assembly; 61. sliding bracket; 62. second telescopic rod; 63. push plate; 64. coupling agent box; 7. positioning mechanism; 71. supporting shell; 72. scale plate; 73. first limiting frame; 74. second limiting frame; 75. synchronization assembly; 751. first gear; 752. second gear; 753. limiting slide groove; 754. positioning rod; 755. lifting cap; 756. positioning protrusion; 8. camera; 9. data transmitter. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 8 As shown, the present invention provides a crack detection device for highways, comprising a device body 1, a sonic wave detector host 2 and a control box 3 are fixedly connected to the top of the device body 1, a pair of transducer probes 4 are connected to the sonic wave detector host 2 through a data line, an adjustment mechanism 5 is provided at one end of the device body 1, a coupling agent supplement component 6 is provided at the bottom of the adjustment mechanism 5, a positioning mechanism 7 is fixedly connected to the middle of the device body 1, a camera 8 is fixedly connected to the top of the device body 1, and a data transmitter 9 is fixedly connected to the top of the sonic wave detector host 2;

[0037] Among them, the adjustment mechanism 5 includes a lateral adjustment component 51 and a first telescopic rod 52. The output end of the first telescopic rod 52 is fixedly connected to a limiting sleeve 53. The middle part of the limiting sleeve 53 is slidably connected to a push rod 54. Both ends of the push rod 54 are respectively slidably connected to a rocker 55. The end of the rocker 55 away from the push rod 54 is hinged to a fixed frame 56.

[0038] The above scheme is adopted: by setting up the device body 1, the device body 1 carries the acoustic wave detector host 2 and the transducer probe 4 for mobile detection, which saves labor costs and improves efficiency. In addition, the positioning mechanism 7 arranged in the middle of the device body 1 can control the distance without manual marking. At the same time, when performing detection, the coupling agent can be replenished in real time at the bottom of the transducer probe 4 through the coupling agent replenishing component 6 to ensure the accuracy of the measurement.

[0039] like Figures 2 to 4 As shown, the lateral positioning assembly 51 includes a pair of linear guide rails 511, a slider 512 is slidably connected inside the linear guide rails 511, a support frame 513 is fixedly connected to the side of the slider 512, and a rotating shaft 514 is fixedly connected to the top of the slider 512;

[0040] The linear guide rail 511 is located at the top of the device body 1 and is fixedly connected to the device body 1. The support frame 513 passes through the device body 1 and extends to the lower side of the device body 1. The rotating shaft 514 is slidably connected to the middle part of the rocker 55. The first telescopic rod 52 is fixedly connected to the device body 1. The lower end of the fixed frame 56 is fixedly connected to the transducer probe 4.

[0041] The above scheme is adopted: by setting the adjustment mechanism 5, the slider 512 on the linear guide rail 511 drives the seesaw 55 to move, so that the seesaw 55 pulls the fixing frame 56 to drive the transducer probe 4 to move synchronously, so as to adjust the lateral position of the transducer probe 4, so as to control the lateral movement spacing to be equal during detection, and by setting the first telescopic rod 52 and the limiting sleeve 53, the first telescopic rod 52 can push the limiting sleeve 53 to drive the push rod 54 to move up and down, and control the up and down movement of the transducer probe 4 in the form of a lever, so as to facilitate the movement of the transducer probe 4 after the detection is completed, and at the same time the transducer probe 4 does not rub against the road surface.

[0042] like Figure 3 and Figure 5 As shown, the coupling agent supplement component 6 includes a pair of sliding brackets 61, a second telescopic rod 62 is arranged inside the sliding bracket 61, a push plate 63 is fixedly connected to the output end of the second telescopic rod 62, and a coupling agent box 64 is placed inside the sliding bracket 61;

[0043] The sliding bracket 61 is located at the bottom of the slider 512 and is slidably connected to the slider 512. The sliding bracket 61 is in contact with the transducer probe 4. One end of the second telescopic rod 62 is fixedly connected to the slider 512. The push plate 63 is slidably connected inside the sliding bracket 61 and is in contact with the coupling agent box 64. The discharge outlet of the coupling agent box 64 faces upward.

[0044] The above scheme is adopted: by setting up the coupling agent replenishing component 6, the second telescopic rod 62 pushes the push plate 63 and the coupling agent box 64 to move, and then the coupling agent box 64 squeezes the sliding bracket 61 to move to contact the transducer probe 4. After the sliding bracket 61 contacts the transducer probe 4, the second telescopic rod 62 will push and squeeze the coupling agent box 64, so that the coupling agent inside the coupling agent box 64 is squeezed out and applied to the bottom of the transducer probe 4, so as to replenish the coupling agent and save the step of manual application.

[0045] like Figure 5 , Figure 6 and Figure 8 As shown, the positioning mechanism 7 includes a supporting shell 71, a scale plate 72 is rotatably connected to the top of the supporting shell 71, a first limit frame 73 and a second limit frame 74 are slidably connected inside the supporting shell 71, a synchronization component 75 is arranged in the middle of the supporting shell 71, the supporting shell 71 is fixedly connected to the middle of the device body 1, the scale plate 72 faces the side of the supporting shell 71 close to the adjustment mechanism 5, the first limit frame 73 and the second limit frame 74 are both provided with a limit ring on the same side, the limit ring is slidably connected to the transducer probe 4, the first limit frame 73 and the second limit frame 74 are slidably connected, and the first limit frame 73 and the first limit frame 73 are both provided with teeth on one side of the supporting shell 71 and face oppositely.

[0046] The above scheme is adopted: by setting the positioning mechanism 7, the moving distance of the transducer probe 4 is marked by the scale plate 72, and at the same time, a scale line is also set on the top of the supporting shell 71 for use after the scale plate 72 is turned over. The first limit frame 73 and the second limit frame 74 are set inside the supporting shell 71. By setting a limit ring on the same side of the first limit frame 73 and the second limit frame 74, the transducer probe 4 can be limited and the moving distance of the transducer probe 4 can be clearly displayed. By setting the synchronization component 75 and the first limit frame 73 and the first limit frame 73 with teeth, the first limit frame 73 and the second limit frame 74 can be controlled to move synchronously or move freely respectively, so as to distinguish between cross-slit detection and non-cross-slit detection.

[0047] like Figures 5 to 8As shown, the synchronization component 75 includes a first gear 751 and a second gear 752. A pair of limiting sliding grooves 753 are opened inside the first gear 751. A locking rod 754 is slidably connected inside the first gear 751 and the second gear 752. A lifting cap 755 is rotatably connected to the top of the locking rod 754. A locking protrusion 756 is arranged in the middle of the second gear 752. The first gear 751 is located on the upper side of the second gear 752 and in the middle of the supporting shell 71. The first gear 751 and the second gear 752 are both rotatably connected to the supporting shell 71. An arc-shaped protrusion block matching the limiting sliding groove 753 is arranged in the middle of the locking rod 754. The arc-shaped protrusion block is slidably connected inside the limiting slide groove 753, and a locking groove matching the locking protrusion 756 is provided at the bottom of the locking rod 754. The lifting cap 755 penetrates the supporting shell 71 and extends to the top of the supporting shell 71. The lifting cap 755 is rotatably connected to the middle part of the scale plate 72 at the top, and the first gear 751 is meshed with the first limiting frame 73, and the second gear 752 is meshed with the second limiting frame 74. When the scale plate 72 flips over, the lifting cap 755 flips up with the scale plate 72, so that the lifting cap 755 pulls the locking rod 754 to move upward, so that the bottom of the locking rod 754 is disengaged from the locking protrusion 756.

[0048] The above scheme is adopted: by setting a synchronization component 75 to control the switching between the gap crossing detection and the non-gap crossing detection, by setting the first gear 751 and the second gear 752 to mesh with the teeth of the first limiting frame 73 and the second limiting frame 74 respectively, so that when the first limiting frame 73 and the second limiting frame 74 move, they will drive the first gear 751 and the second gear 752 to rotate synchronously, and the setting of the locking rod 754 allows the first gear 751 and the second gear 752 to rotate synchronously, and the arc-shaped protrusion block slidably connected to the inside of the limiting slide groove 753 provided in the middle of the locking rod 754 makes the locking rod 754 always rotate with the first gear 751, and at the same time, the The locking groove matching the locking protrusion 756 ensures that when the locking rod 754 is engaged with the locking protrusion 756, the rotation of the second gear 752 will synchronously drive the locking rod 754 to rotate, and the locking rod 754 will keep the first gear 751 and the second gear 752 rotating synchronously. By setting the lifting cap 755, the lifting cap 755 is rotatably connected to the scale plate 72, so that the flipping of the scale plate 72 will drive the lifting cap 755 to move upward synchronously, so that the lifting cap 755 pulls the locking rod 754 to move upward, so that the bottom of the locking rod 754 is disengaged from the locking protrusion 756, so that the first gear 751 and the second gear 752 are disengaged from the synchronous rotation, so that a pair of transducer probes 4 can be moved separately.

[0049] like Figures 1 to 3As shown, the camera 8 is located in the middle of the device body 1, and the camera 8 is facing the middle of the scale of the positioning mechanism 7, and the data transmitter 9 transmits the data of the acoustic wave detector host 2 to the external computer through the network.

[0050] The above solution is adopted: by setting up a camera 8 to record the parameters of the probe spacing, and by setting up a data transmitter 9, it is convenient for the staff to record the data in real time for unified calculation.

[0051] like Figures 1 to 8 As shown, the present invention proposes a crack detection method for highways, comprising the following steps:

[0052] S1, control the host 2 of the acoustic wave detector by an external computer to set the detection interval and the detection point coordinates, and then move the device body 1 to the detection point, and make the crack and the middle of the scale plate 72 and the camera 8 in the same vertical line;

[0053] S2, perform cross-seam detection, the slider 512 drives the transducer probe 4 to move to the detection position on both sides through the seesaw 55 and the fixing frame 56, and then the second telescopic rod 62 drives the push plate 63 to squeeze the coupling agent box 64 to move, so that the coupling agent box 64 drives the sliding bracket 61 to move to contact with the transducer probe 4, and then the second telescopic rod 62 continues to push the coupling agent box 64 to squeeze and apply the coupling agent to the bottom of the transducer probe 4, and then the sliding bracket 61 drives the push plate 63 and the sliding bracket 61 to retract, and the first telescopic rod 52 drives the push rod 54 to move upward through the limiting sleeve 53, so that the push rod 54 drives the seesaw 55 to turn around the rotating shaft 514, so that the transducer probe 4 moves downward to contact with the road surface for detection, pull up the transducer probe 4, and move the slider 512 to both sides by equal distances for detection, and obtain the data of cross-seam detection;

[0054] S3, perform non-slit detection, reset the transducer probe 4, and then flip the scale plate 72, and pull the lifting cap 755 upward by the scale plate 72, so that the lifting cap 755 pulls the locking rod 754 to slide along the limiting slide groove 753, so that the bottom of the locking rod 754 is released from the locking protrusion 756, so that the first gear 751 and the second gear 752 are released from synchronous rotation, and then the device body 1 is moved to the detection point. At this time, the slider 512 on one side is controlled to move, and the slider 512 on the other side remains stationary, and the moving distance of the slider 512 on the moving side is increased by equal distances one by one, and the data of non-slit detection is obtained;

[0055] S4. Compare and analyze the data of cross-seam detection and non-cross-seam detection, and calculate the depth of the crack using relevant formulas or software in combination with the parameters of the probe spacing.

[0056] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0057] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A crack detection device for a highway, comprising a device body (1), characterized in that: The top of the device body (1) is fixedly connected to a sound wave detector host (2) and a control box (3); the sound wave detector host (2) is connected to a pair of transducer probes (4) via a data line; an adjustment mechanism (5) is provided at one end of the device body (1); a coupling agent supplement component (6) is provided at the bottom of the adjustment mechanism (5); a positioning mechanism (7) is fixedly connected to the middle of the device body (1); a camera (8) is fixedly connected to the top of the device body (1); and a data transmitter (9) is fixedly connected to the top of the sound wave detector host (2); The adjustment mechanism (5) comprises a lateral adjustment component (51) and a first telescopic rod (52); the output end of the first telescopic rod (52) is fixedly connected to a limiting sleeve (53); the middle of the limiting sleeve (53) is slidably connected to a push rod (54); both ends of the push rod (54) are respectively slidably connected to a rocker plate (55); and one end of the rocker plate (55) away from the push rod (54) is hinged to a fixing frame (56).

2. The highway crack detection device according to claim 1, characterized in that: The lateral positioning assembly (51) comprises a pair of linear guide rails (511), a slider (512) is slidably connected inside the linear guide rails (511), a support frame (513) is fixedly connected to the side of the slider (512), and a rotating shaft (514) is fixedly connected to the top of the slider (512); The linear guide rail (511) is located at the top of the device body (1) and is fixedly connected to the device body (1); the support frame (513) passes through the device body (1) and extends to the lower side of the device body (1); the rotating shaft (514) is slidably connected to the middle of the seesaw (55); the first telescopic rod (52) is fixedly connected to the device body (1); and the lower end of the fixed frame (56) is fixedly connected to the transducer probe (4).

3. The highway crack detection device according to claim 1, characterized in that: The coupling agent replenishing component (6) comprises a pair of sliding brackets (61), a second telescopic rod (62) is arranged inside the sliding bracket (61), a push plate (63) is fixedly connected to the output end of the second telescopic rod (62), and a coupling agent box (64) is placed inside the sliding bracket (61); The sliding bracket (61) is located at the bottom of the slider (512) and is slidably connected to the slider (512), the sliding bracket (61) is in contact with the transducer probe (4), one end of the second telescopic rod (62) is fixedly connected to the slider (512), the push plate (63) is slidably connected inside the sliding bracket (61) and is in contact with the coupling agent box (64), and the discharge outlet of the coupling agent box (64) faces upward.

4. The highway crack detection device according to claim 1, characterized in that: The positioning mechanism (7) comprises a supporting shell (71), the top of the supporting shell (71) is rotatably connected to a scale plate (72), the interior of the supporting shell (71) is slidably connected to a first limiting frame (73) and a second limiting frame (74), and a synchronization component (75) is arranged in the middle of the supporting shell (71).

5. The highway crack detection device according to claim 4, characterized in that: The support shell (71) is fixedly connected to the middle part of the device body (1); the scale plate (72) faces the side of the support shell (71) close to the adjustment mechanism (5); a limit ring is provided on the same side of the first limit frame (73) and the second limit frame (74); the limit ring is slidably connected to the transducer probe (4); the first limit frame (73) and the second limit frame (74) are slidably connected; the first limit frame (73) and the first limit frame (74) are both provided with teeth on one side located inside the support shell (71) and facing opposite directions.

6. The highway crack detection device according to claim 4, characterized in that: The synchronization component (75) includes a first gear (751) and a second gear (752), wherein a pair of limiting sliding grooves (753) are provided inside the first gear (751), a locking rod (754) is slidably connected inside the first gear (751) and the second gear (752), a lifting cap (755) is rotatably connected to the top of the locking rod (754), and a locking protrusion (756) is provided in the middle of the second gear (752).

7. The highway crack detection device according to claim 6, characterized in that: The first gear (751) is located on the upper side of the second gear (752) and in the middle of the supporting shell (71). The first gear (751) and the second gear (752) are both rotatably connected to the supporting shell (71). An arc-shaped protrusion block matching the limiting slide groove (753) is provided in the middle of the locking rod (754). The arc-shaped protrusion block is slidably connected inside the limiting slide groove (753). A locking groove matching the locking protrusion (756) is provided at the bottom of the locking rod (754). The lifting cap (755) passes through the supporting shell (71) and extends to the top of the supporting shell (71). The top of the lifting cap (755) is rotatably connected to the middle of the scale plate (72).

8. The highway crack detection device according to claim 6, characterized in that: The first gear (751) is meshedly connected with the first limiting frame (73), and the second gear (752) is meshedly connected with the second limiting frame (74). When the scale plate (72) flips over, the lifting cap (755) flips up with the scale plate (72), so that the lifting cap (755) pulls the locking rod (754) to move upward, so that the bottom of the locking rod (754) is released from the locking protrusion (756).

9. The highway crack detection device according to claim 1, characterized in that: The camera (8) is located in the middle of the device body (1), and the camera (8) is facing the middle of the scale of the positioning mechanism (7). The data transmitter (9) transmits the data of the acoustic wave detector host (2) to the external computer through the network.

10. A highway crack detection method, applied to a highway crack detection device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1, the host computer (2) of the sonic wave detector is controlled by an external computer to set the detection interval and the coordinates of the detection point, and then the device body (1) is moved to the detection point, and the crack is placed on the same vertical line as the middle of the scale plate (72) and the camera (8); S2. Perform cross-slit detection. The slider (512) drives the transducer probe (4) to move to the detection position on both sides through the seesaw (55) and the fixing frame (56). Then the second telescopic rod (62) drives the push plate (63) to squeeze the coupling agent box (64) to move, so that the coupling agent box (64) drives the sliding bracket (61) to move to contact the transducer probe (4). Then the second telescopic rod (62) continues to push the coupling agent box (64) to squeeze and apply the coupling agent to the bottom of the transducer probe (4). The sliding bracket (61) then drives the push plate (63) and the sliding bracket (61) to retract, and the first telescopic rod (52) pushes the push rod (54) to move upward through the limiting sleeve (53), so that the push rod (54) pushes the seesaw (55) to flip around the rotating shaft (514), so that the transducer probe (4) moves downward until it contacts the road surface for detection, and the transducer probe (4) is pulled up and moved to both sides by equal distances through the slider (512) for detection one by one, thereby obtaining data of cross-slit detection; S3, perform non-slit detection, reset the transducer probe (4), and then flip the scale plate (72), and pull the lifting cap (755) upward by the scale plate (72), so that the lifting cap (755) pulls the locking rod (754) to slide along the limiting slide groove (753), so that the bottom of the locking rod (754) and the locking protrusion (756) are released from the locking, so that the first gear (751) and the second gear (752) are released from synchronous rotation, and then the device body (1) is moved to the detection point. At this time, the slider (512) on one side is controlled to move, and the slider (512) on the other side is kept stationary, and the moving distance of the slider (512) on the moving side is increased by equal distances step by step to obtain the data of non-slit detection; S4. Compare and analyze the data of cross-seam detection and non-cross-seam detection, and calculate the depth of the crack using relevant formulas or software in combination with the parameters of the probe spacing.

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