Radar exploration-based flaw detection equipment and method for hidden cracks in road surface

Abstract

The invention relates to the technical field of pavement flaw detection equipment, in particular to a radar exploration-based pavement internal hidden crack flaw detection equipment and a radar exploration-based pavement internal hidden crack flaw detection method, the radar exploration-based pavement internal hidden crack flaw detection equipment comprises a regulation and control receiving structure and an emission displacement structure, and the lower end of the regulation and control receiving structure is fixedly connected with the emission displacement structure; the regulation and control receiving structure comprises a receiving regulation part, a signal transmitter, an underframe seat, a bottom plate frame, a motor and an infrared distance meter, the motor is mounted on the bottom plate frame, the infrared distance meter is fixedly mounted at the front end of the bottom plate frame, one side of the bottom plate frame is fixedly connected with the underframe seat, and the other side of the bottom plate frame is fixedly connected with the signal transmitter. And the side end of the bottom frame base is hinged to a receiving adjusting component, a signal transmitter is fixedly installed in the center of the bottom plate frame, and through the arrangement of the structure, flaw detection work of hidden cracks in a road surface can be conveniently conducted.

Description

Technical Field

[0001] The present invention relates to the technical field of road surface flaw detection equipment, specifically a road surface internal hidden crack flaw detection equipment and method based on radar exploration. Background Art

[0002] Using vehicle-mounted and push-type ground penetrating radar to detect municipal roads, potential diseases such as cracks and cavities are found to ensure road safety. The detection includes equipment calibration, data collection, analysis and interpretation, drawing of disease distribution maps, and review and confirmation. The causes of diseases are analyzed in combination with design and construction data and quantitatively analyzed.

[0003] According to Chinese Patent Publication No. CN102012221B, a non-destructive detection method for the depth of road surface cracks based on ground penetrating radar is disclosed, including: emitting electromagnetic waves to the cracks on the road surface at a sampling interval S and a transmission frequency; selecting the electromagnetic wave amplitude corresponding to the material at the bottom of the crack from the received reflected electromagnetic waves according to the electromagnetic wave amplitudes reflected by each layer of material in the road surface crack; filtering out the corresponding electromagnetic waves from the received reflected electromagnetic waves according to the selected electromagnetic wave amplitude; using the travel time of the filtered electromagnetic waves and the dielectric constants of each layer of material on the road surface to calculate the depth of the road surface crack. By the reflected waves at different depths of the crack, the electromagnetic waves reflected back from the deepest part are extracted, so as to effectively measure the cracking depth of the road surface.

[0004] For the existing road surface internal hidden crack flaw detection equipment based on radar exploration, when in use, the contact area cannot be enlarged. When the radar wave rebounds, due to the different angles of the hidden cracks, the rebound wave is likely to shift, resulting in the receiver not receiving the rebound signal. Therefore, a structure is needed to solve the above problems. Summary of the Invention

[0005] Aiming at the problems in the prior art, the present invention provides a road surface internal hidden crack flaw detection equipment and method based on radar exploration.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a road surface internal hidden crack flaw detection equipment and method based on radar exploration, including a regulation and reception structure and a transmission displacement structure, and the lower end of the regulation and reception structure is fixedly connected with the transmission displacement structure;

[0007] The control receiving structure includes a receiving adjustment component, a signal transmitter, a chassis base, a bottom plate frame, a motor, and an infrared rangefinder. The motor is installed on the bottom plate frame. The infrared rangefinder is fixedly installed at the front end of the bottom plate frame. One side of the bottom plate frame is fixedly connected to the chassis base. The side end of the chassis base is hinged to the receiving adjustment component. The signal transmitter is fixedly installed at the central position of the bottom plate frame. Through the structural setting of the control receiving structure, it is convenient to carry out receiving expansion work, which can expand the contact area. When the radar wave rebounds, the receiver can receive the rebound signals from more positions. The double-headed motor can drive the worm gear and the output shaft to rotate through the worm, so that the output shaft drives the second connecting rod to rotate accordingly, and the rotation range is controlled within degrees. Thus, the second connecting rod drives the connecting shaft frame to move through the first connecting rod. The connecting shaft frame conducts the force to the receiving plate through the docking connecting shaft seat. At this time, the receiving plate rotates on the limit support through the rotation adjustment shaft, and the side end of the rotation adjustment shaft is fixedly connected to the movable fitting frame. The upper end of the movable fitting frame rotates on the arc-shaped track plate through the displacement guide rod. The position sensor detects the position of the displacement guide rod, which can detect the position of the receiving plate in real time and is convenient for angle control work.

[0008] Specifically, the receiving adjustment component includes a flipping receiving mechanism and a driving control mechanism. The side end of the driving control mechanism is drivingly connected to the flipping receiving mechanism. The flipping receiving mechanism includes a receiving plate, a connecting shaft frame, a docking connecting shaft seat, a displacement guide rod, a position sensor, an arc-shaped track plate, a rotation adjustment shaft, and a limit support. The central side end of the receiving plate is fixedly connected to the docking connecting shaft seat. The connecting shaft frame is fixedly connected to the docking connecting shaft seat. The first connecting rod is sleeved on the connecting shaft frame. The lower end of the first connecting rod is hinged to the second connecting rod. The lower end of the receiving plate is hinged to the limit support through the rotation adjustment shaft. The side end of the rotation adjustment shaft is fixedly connected to the displacement guide rod through the movable fitting frame. The displacement guide rod rotates on the arc-shaped track plate, and a position sensor is provided at the front end of the arc-shaped track plate. The position sensor is used for sensing the position of the displacement guide rod.

[0009] Specifically, the driving control mechanism includes a first mounting plate, a second mounting plate, and a double-headed motor. The second mounting plate is fixedly connected to the side end of the first mounting plate. The side end of the double-headed motor is drivingly connected to a worm. The worm is meshed with a worm gear. The front end of the worm gear is fixedly connected to an output shaft. The output shaft penetrates through the second mounting plate.

[0010] Specifically, the emission displacement structure includes a central support, a lead screw, a hydraulic telescopic shaft, a radar reflector, a special-shaped support, a movable support slide bar, a universal wheel, and a receiving card board. The side end of the receiving card board is fixedly connected to the central support. The lower end of the central support is equipped with a hydraulic telescopic shaft. The lower end of the hydraulic telescopic shaft is telescopically connected to a radar reflector. Through the structural setting of the emission displacement structure, the motor can drive the lead screw to rotate. The lead screw is threadedly connected to the special-shaped support to change the position of the radar reflector. When the radar reflector moves, it drives the hydraulic telescopic shaft to adjust passively, so that the transmitting head at the lower end of the radar reflector fits the ground, thereby transmitting radar signals. Moreover, the receiving structure and the receiving card board can be adjusted by the universal wheel to move, which is convenient for detecting together with the vehicle.

[0011] Specifically, the side end of the radar reflector is fixedly connected to a special-shaped support. One side of the special-shaped support is threadedly connected to the lead screw, and the other side of the special-shaped support is slidably connected to the movable support slide bar. The lower end of the receiving card board is fixedly connected to a universal wheel.

[0012] Specifically, a transmitting head is provided at the lower end of the hydraulic telescopic shaft, and the transmitting head is in contact with the ground. The motor is drivingly connected to the lead screw, and the motor controls the position adjustment of the radar reflector and the special-shaped support through the lead screw.

[0013] Specifically, the upper ends of the central support and the receiving card board are fixed to the bottom plate frame. The double-headed motor is fixed at the middle position of the bottom plate frame. A plurality of receivers are provided on the receiving plate.

[0014] Specifically, the arc-shaped track plate is fixed to the bottom frame seat. The worm gear drives the second connecting rod to rotate through the output shaft, and the second connecting rod controls the movement of the connecting shaft frame through the first connecting rod. The lower end of the receiving plate is rotationally adjusted with the limiting support through the rotational adjustment shaft.

[0015] Specifically, the lower ends of the first mounting plate and the second mounting plate are fixedly connected to the bottom plate frame. The double-headed motor controls the rotation of the worm gear through the worm, and controls the worm gear to rotate reciprocally by 80°.

[0016] A method for a pavement internal hidden crack detection device based on radar exploration includes the following steps:

[0017] S1. First, a universal wheel is provided at the bottom of the emission displacement structure, which is convenient for adjusting the movement of the receiving structure and the emission displacement structure. Moreover, the receiving structure and the emission displacement structure can be fixed to the vehicle, so as to follow the vehicle for continuous detection. During the detection, at this time, the motor drives the lead screw to rotate. The lead screw is threadedly connected to the special-shaped support, which can change the positions of the radar reflector and the special-shaped support. The hydraulic telescopic shaft at the upper end of the radar reflector follows for telescopic adjustment. At this time, the transmitting head at the lower end of the radar reflector contacts the ground and can emit radar waves;

[0018] S2. When there are cracks in the ground, it can reflect waves at different angles, and the receiving card board can perform detection work. After analysis and processing, the information is transmitted to the inside of the computer through the signal transmitter.

[0019] S3. When it is necessary to expand the receiving area, the double-headed motor works at this time, driving the worm to rotate. The worm meshes with the worm wheel, driving the worm wheel to adjust the angle by 80 degrees. Through the output shaft, the second connecting rod can be driven to rotate. When the second connecting rod rotates, it drives the first connecting rod to move accordingly. At this time, the first connecting rod drives the receiving plate and the docking coupling seat to swing through the movable fitting frame.

[0020] S4. The lower end of the receiving plate rotates with the limiting support through the rotation adjustment shaft to realize the angle adjustment of the receiving plate and expand the receiving area. When the receiving plate rotates, it drives the displacement guide rod to adjust accordingly on the arc-shaped track plate through the movable fitting frame. At this time, the in-place sensor can check the position of the displacement guide rod in real time, so as to analyze the position of the receiving plate. The receiving plate is provided with a receiver, which can perform the detection and analysis of radar waves, thereby expanding the detection range and better performing the detection work.

[0021] Advantages of the present invention:

[0022] First, through the structural setting of the receiving structure of the present invention, it is convenient to carry out the receiving expansion work, and the contact area can be expanded. When the radar wave rebounds, the receiver can receive the rebound signals at more positions. The double-headed motor can drive the worm wheel and the output shaft to rotate through the worm, so that the output shaft drives the second connecting rod to rotate accordingly, and the rotation range is controlled within 80 degrees. Thus, the second connecting rod drives the connecting shaft frame to move through the first connecting rod. The connecting shaft frame conducts the force to the receiving plate through the docking coupling seat. At this time, the receiving plate rotates on the limiting support through the rotation adjustment shaft, and the side end of the rotation adjustment shaft is fixed to the movable fitting frame. The upper end of the movable fitting frame rotates on the arc-shaped track plate through the displacement guide rod. The in-place sensor detects the position of the displacement guide rod, and can detect the position of the receiving plate in real time, which is convenient for controlling the angle.

[0023] Second, through the structural setting of the emission displacement structure of the present invention, the motor can drive the lead screw to rotate. The lead screw is threadedly connected with the special-shaped bracket, changing the position of the radar reflector. When the radar reflector moves, it drives the hydraulic telescopic shaft to adjust passively, so that the transmitting head at the lower end of the radar reflector fits the ground, thereby transmitting radar signals. Moreover, the receiving structure and the receiving card board can be adjusted by the universal wheels, which is convenient to detect together with the vehicle. Description of the drawings

[0024] The present invention will be further described below in conjunction with the drawings and embodiments.

[0025] Figure 1Schematic diagram of the three-dimensional structure of the main body in the present invention;

[0026] Figure 2 Three-dimensional side view of the main body in the present invention;

[0027] Figure 3 Exploded view of the main body in the present invention;

[0028] Figure 4 Three-dimensional structure diagram of the regulation and reception structure in the present invention;

[0029] Figure 5 Three-dimensional structure diagram of the reception adjustment component in the present invention from the front perspective;

[0030] Figure 6 Three-dimensional structure diagram of the flipping reception mechanism in the present invention from the front perspective;

[0031] Figure 7 Three-dimensional structure diagram of the drive control mechanism in the present invention from the front perspective;

[0032] Figure 8 Exploded view of the drive control mechanism in the present invention;

[0033] Figure 9 Three-dimensional structure diagram of the emission displacement structure in the present invention from the front perspective.

[0034] In the figure: 1 - regulation and reception structure, 2 - emission displacement structure, 3 - reception adjustment component, 4 - signal transmitter, 5 - chassis base, 6 - bottom plate frame, 7 - motor, 8 - infrared rangefinder, 9 - flipping reception mechanism, 10 - drive control mechanism, 11 - reception plate, 12 - connecting shaft frame, 13 - docking connecting shaft seat, 14 - displacement guide rod, 15 - in-place sensor, 16 - arc-shaped track plate, 17 - rotation adjustment shaft, 18 - limit support, 19 - first connecting rod, 20 - second connecting rod, 21 - movable fitting frame, 22 - first mounting plate, 23 - second mounting plate, 24 - double-headed motor, 25 - worm gear, 26 - output shaft, 27 - worm, 28 - central support, 29 - lead screw, 30 - hydraulic telescopic shaft, 31 - radar reflector, 32 - special-shaped support, 33 - movable support slide bar, 34 - universal wheel, 35 - reception clamping plate. Detailed implementation manners

[0035] In order to enable those skilled in the art to better understand the solution of the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0036] The present invention will be further described below in conjunction with the accompanying drawings.

[0037] Embodiment

[0038] As Figures 1-9 As shown, the device and method for detecting hidden cracks inside the road surface based on radar exploration of the present invention include a control and reception structure 1 and a transmission displacement structure 2. The lower end of the control and reception structure 1 is fixedly connected to the transmission displacement structure 2;

[0039] The control and reception structure 1 includes a reception adjustment component 3, a signal transmitter 4, a chassis base 5, a bottom plate frame 6, a motor 7, and an infrared rangefinder 8. A motor 7 is installed on the bottom plate frame 6. An infrared rangefinder 8 is fixedly installed at the front end of the bottom plate frame 6. One side of the bottom plate frame 6 is fixedly connected to a chassis base 5. The side end of the chassis base 5 is hinged to the reception adjustment component 3. A signal transmitter 4 is fixedly installed at the central position of the bottom plate frame 6.

[0040] The reception adjustment component 3 includes a flipping reception mechanism 9 and a drive control mechanism 10. The side end of the drive control mechanism 10 is drivingly connected to the flipping reception mechanism 9. The flipping reception mechanism 9 includes a reception plate 11, a connecting shaft frame 12, a docking connecting shaft seat 13, a displacement guide rod 14, a position sensor 15, an arc track plate 16, a rotation adjustment shaft 17, and a limit support 18. The central side end of the reception plate 11 is fixedly connected to a docking connecting shaft seat 13. A connecting shaft frame 12 is fixedly connected to the docking connecting shaft seat 13. A first connecting rod 19 is sleeved on the connecting shaft frame 12. The lower end of the first connecting rod 19 is hinged to a second connecting rod 20. The lower end of the reception plate 11 is hinged to a limit support 18 through a rotation adjustment shaft 17. The side end of the rotation adjustment shaft 17 is fixedly connected to the displacement guide rod 14 through a movable fitting frame 21. The displacement guide rod 14 rotates on the arc track plate 16, and a position sensor 15 is provided at the front end of the arc track plate 16 for sensing the position of the displacement guide rod 14. When it is necessary to expand the reception area, at this time, the double-headed motor 24 works to drive the worm 27 to rotate, and the worm 27 meshes with the worm gear 25 to drive the worm gear 25 to perform an 80-degree angle adjustment. The output shaft 26 can drive the second connecting rod 20 to rotate. When the second connecting rod 20 rotates, it drives the first connecting rod 19 to move accordingly. At this time, the first connecting rod 19 drives the reception plate 11 and the docking connecting shaft seat 13 to swing through the movable fitting frame 21. The lower end of the reception plate 11 rotates with the limit support 18 through the rotation adjustment shaft 17 to realize the angle adjustment of the reception plate 11 and expand the reception area. When the reception plate 11 rotates, it drives the displacement guide rod 14 to adjust accordingly on the arc track plate 16 through the movable fitting frame 21. At this time, the position sensor 15 can check the position of the displacement guide rod 14 in real time, so as to analyze the position of the reception plate 11. A receiver is provided on the reception plate 11, which can detect and analyze radar waves, thereby expanding the detection range and better performing the detection work.

[0041] The drive control mechanism 10 includes a first mounting plate 22, a second mounting plate 23, and a double-headed motor 24. The side end of the first mounting plate 22 is fixedly connected to the second mounting plate 23. The side end of the double-headed motor 24 is drivingly connected to a worm 27. A worm gear 25 is meshed with the worm 27. The front end of the worm gear 25 is fixedly connected to an output shaft 26, and the output shaft 26 penetrates through the second mounting plate 23.

[0042] The emission displacement structure 2 includes a central support 28, a lead screw 29, a hydraulic telescopic shaft 30, a radar reflector 31, a special-shaped support 32, a movable support slide bar 33, a universal wheel 34, and a receiving card board 35. The side end of the receiving card board 35 is fixedly connected to the central support 28. The lower end of the central support 28 is provided with a hydraulic telescopic shaft 30. The lower end of the hydraulic telescopic shaft 30 is telescopically connected to a radar reflector 31. Universal wheels 34 are provided at the bottom of the emission displacement structure 2, which facilitates the adjustment of the movement of the receiving structure 1 and the emission displacement structure 2, and the receiving structure 1 and the emission displacement structure 2 can be fixed to the vehicle, so as to follow the vehicle for continuous detection. During the detection, at this time, the motor 7 drives the lead screw 29 to rotate. The lead screw 29 is threadedly connected to the special-shaped support 32, which can change the positions of the radar reflector 31 and the special-shaped support 32. The hydraulic telescopic shaft 30 at the upper end of the radar reflector 31 follows for telescopic adjustment. At this time, the emission head at the lower end of the radar reflector 31 contacts the ground and can emit radar waves.

[0043] The side end of the radar reflector 31 is fixedly connected to a special-shaped support 32. One side of the special-shaped support 32 is threadedly connected to the lead screw 29, and the other side of the special-shaped support 32 is slidably connected to the movable support slide bar 33. The lower end of the receiving card board 35 is fixedly connected to the universal wheel 34.

[0044] The lower end of the hydraulic telescopic shaft 30 is provided with an emission head, and the emission head is in contact with the ground. The motor 7 is drivingly connected to the lead screw 29, and the motor 7 controls the position adjustment of the radar reflector 31 and the special-shaped support 32 through the lead screw 29.

[0045] The upper ends of the central support 28 and the receiving card board 35 are fixed to the bottom plate frame 6. The double-headed motor 24 is fixed at the middle position of the bottom plate frame 6. A plurality of receivers are provided on the receiving plate 11. When there are cracks in the ground, waves at different angles can be reflected, and the receiving card board 35 can perform detection work. After analysis and processing, the information is transmitted to the inside of the computer through the signal transmitter 4.

[0046] The arc-shaped track plate 16 is fixed to the chassis seat 5. The worm gear 25 drives the second connecting rod 20 to rotate through the output shaft 26, and the second connecting rod 20 controls the movement of the connecting shaft frame 12 through the first connecting rod 19. The lower end of the receiving plate 11 is rotationally adjusted with the limit support 18 through the rotation adjustment shaft 17.

[0047] The lower ends of the first mounting plate 22 and the second mounting plate 23 are fixedly connected to the bottom plate frame 6. The double-headed motor 24 controls the rotation of the worm gear 25 through the worm 27, and controls the worm gear 25 to rotate reciprocally by 80°.

[0048] The working principle is as follows: When in use, universal wheels 34 are provided at the bottom of the emission displacement structure 2, which facilitates the adjustment of the movement of the receiving structure 1 and the emission displacement structure 2, and the receiving structure 1 and the emission displacement structure 2 can be fixed to the vehicle, so as to follow the vehicle for continuous detection. During the detection, at this time, the motor 7 drives the lead screw 29 to rotate. The lead screw 29 is threadedly connected to the special-shaped bracket 32, which can change the positions of the radar reflector 31 and the special-shaped bracket 32. The hydraulic telescopic shaft 30 at the upper end of the radar reflector 31 follows for telescopic adjustment. At this time, the transmitting head at the lower end of the radar reflector 31 contacts the ground and can transmit radar waves. When there are cracks in the ground, waves at different angles can be reflected, and the receiving card board 35 can perform the detection work. Then, through analysis and processing, the information is transmitted to the inside of the computer through the signal transmitter 4. When it is necessary to expand the receiving area, at this time, the double-headed motor 24 works, drives the worm 27 to rotate, and the worm 27 meshes with the worm gear 25 to drive the worm gear 25 to perform an 80-degree angle adjustment. Through the output shaft 26, the second connecting rod 20 can be driven to rotate. When the second connecting rod 20 rotates, it drives the first connecting rod 19 to move accordingly. At this time, the first connecting rod 19 drives the receiving plate 11 and the docking shaft seat 13 to swing through the movable fitting frame 21. The lower end of the receiving plate 11 rotates with the limiting support 18 through the rotating adjustment shaft 17 to realize the angle adjustment of the receiving plate 11 and expand the receiving area. When the receiving plate 11 rotates, it drives the displacement guide rod 14 to adjust along the arc-shaped track plate 16 through the movable fitting frame 21. At this time, the in-place sensor 15 can check the position of the displacement guide rod 14 in real time, so as to analyze the position of the receiving plate 11. The receiving plate 11 is provided with a receiver, which can perform the detection and analysis of radar waves, so as to expand the detection range and better perform the detection work to complete the work.

[0049] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. The equipment for detecting hidden cracks inside the road surface based on radar exploration is characterized by: It comprises a regulating and receiving structure (1) and a transmitting and displacing structure (2), wherein the lower end of the regulating and receiving structure (1) is fixedly connected to the transmitting and displacing structure (2); The control receiving structure (1) comprises a receiving and adjusting component (3), a signal transmitter (4), a base frame (5), a base frame (6), a motor (7) and an infrared rangefinder (8); the base frame (6) is provided with a motor (7); the front end of the base frame (6) is fixedly provided with an infrared rangefinder (8); one side of the base frame (6) is fixedly connected with the base frame (5); the side end of the base frame (5) is hingedly arranged with the receiving and adjusting component (3); and the center position of the base frame (6) is fixedly provided with the signal transmitter (4).

2. The radar-based road surface internal hidden crack detection equipment according to claim 1 is characterized in that: The receiving and adjusting component (3) comprises a flip receiving mechanism (9) and a driving control mechanism (10), the side end of the driving control mechanism (10) is drivingly connected to the flip receiving mechanism (9), the flip receiving mechanism (9) comprises a receiving plate (11), a connecting shaft frame (12), a butt joint shaft seat (13), a displacement guide rod (14), an in-position sensor (15), an arc track plate (16), a rotation adjustment shaft (17) and a limit support (18), the central side end of the receiving plate (11) is fixedly connected to the butt joint shaft seat (13), and the butt joint shaft seat (13) is fixedly connected to the connecting shaft frame ( 12), a first connecting rod (19) is sleeved on the connecting shaft frame (12), a second connecting rod (20) is hingedly provided at the lower end of the first connecting rod (19), a limit support (18) is hingedly provided at the lower end of the receiving plate (11) through a rotating adjustment shaft (17), a side end of the rotating adjustment shaft (17) is fixedly connected to a displacement guide rod (14) through a movable matching frame (21), the displacement guide rod (14) rotates on the arc track plate (16), and an in-position sensor (15) is provided at the front end of the arc track plate (16), and the in-position sensor (15) is used to sense the position of the displacement guide rod (14).

3. The radar-based road surface internal hidden crack detection equipment according to claim 2 is characterized in that: The drive control mechanism (10) comprises a first mounting plate (22), a second mounting plate (23) and a double-headed motor (24); the side end of the first mounting plate (22) is fixedly connected to the second mounting plate (23); the side end of the double-headed motor (24) is drivingly connected to a worm (27); the worm (27) is meshingly connected to a worm wheel (25); the front end of the worm wheel (25) is fixedly connected to an output shaft (26); and the output shaft (26) passes through the second mounting plate (23).

4. The radar-based road surface internal hidden crack detection equipment according to claim 3 is characterized by: The launch displacement structure (2) comprises a central support (28), a screw rod (29), a hydraulic telescopic shaft (30), a radar reflector (31), a special-shaped support (32), a movable support slide rod (33), a universal wheel (34) and a receiving card plate (35), wherein the side end of the receiving card plate (35) is fixedly connected to the central support (28), the lower end of the central support (28) is equipped with a hydraulic telescopic shaft (30), and the lower end of the hydraulic telescopic shaft (30) is telescopically connected to the radar reflector (31).

5. The radar-based road surface internal hidden crack detection equipment according to claim 4 is characterized in that: The side end of the radar reflector (31) is fixedly connected to a special-shaped bracket (32), the special-shaped bracket (32) on one side is threadedly connected to the screw rod (29), and the special-shaped bracket (32) on the other side is slidably connected to the movable support slide rod (33), and the lower end of the receiving card plate (35) is fixedly connected to a universal wheel (34).

6. The radar-based road surface internal hidden crack detection equipment according to claim 5 is characterized by: The lower end of the hydraulic telescopic shaft (30) is provided with a transmitter head, and the transmitter head is in contact with the ground. The motor (7) is drivingly connected to a screw rod (29), and the motor (7) controls the radar reflector (31) and the special-shaped bracket (32) through the screw rod (29) to adjust the position.

7. The radar-based road surface internal hidden crack detection device according to claim 6 is characterized by: The upper ends of the central support (28) and the receiving card plate (35) are fixed to the bottom plate frame (6), the double-headed motor (24) is fixed to the middle position of the bottom plate frame (6), and a plurality of receivers are arranged on the receiving plate (11).

8. The radar-based road surface internal hidden crack detection device according to claim 7 is characterized in that: The arc track plate (16) is fixed to the base frame (5), the worm gear (25) drives the second connecting rod (20) to rotate through the output shaft (26), and the second connecting rod (20) controls the movement of the connecting shaft frame (12) through the first connecting rod (19), and the lower end of the receiving plate (11) is rotated and adjusted through the rotating adjustment shaft (17) and the limit support (18).

9. The radar-based road surface internal hidden crack detection device according to claim 8 is characterized in that: The lower ends of the first mounting plate (22) and the second mounting plate (23) are fixedly connected to the bottom plate frame (6); the double-headed motor (24) controls the rotation of the worm wheel (25) through the worm (27), and controls the worm wheel (25) to reciprocate by 80°.

10. A method for detecting hidden cracks in a road surface based on radar exploration, using the hidden crack detection device in a road surface based on radar exploration as claimed in claim 9, characterized in that: The following steps are involved: S1. First, a universal wheel (34) is provided at the bottom of the transmitting displacement structure (2) to facilitate the movement of the receiving structure (1) and the transmitting displacement structure (2), and the receiving structure (1) and the transmitting displacement structure (2) can be fixed to the vehicle, so as to follow the vehicle for continuous detection. During the detection, the motor (7) drives the screw rod (29) to rotate, and the screw rod (29) is threadedly connected to the special-shaped bracket (32), so that the positions of the radar reflector (31) and the special-shaped bracket (32) can be changed. The hydraulic telescopic shaft (30) at the upper end of the radar reflector (31) is telescopically adjusted accordingly. At this time, the transmitting head at the lower end of the radar reflector (31) is in contact with the ground and can emit radar waves; S2. When there are cracks in the ground, waves at different angles can be reflected, and the receiving card board (35) can perform detection work, and then the information is transmitted to the inside of the computer through the signal transmitter (4) through analysis and processing; S3, when it is necessary to expand the receiving area, the double-headed motor (24) works, driving the worm (27) to rotate, and the worm (27) meshes with the worm wheel (25), driving the worm wheel (25) to adjust the angle by 80 degrees, and the second connecting rod (20) can be driven to rotate through the output shaft (26). When the second connecting rod (20) rotates, it drives the first connecting rod (19) to follow the movement. At this time, the first connecting rod (19) drives the receiving plate (11) and the docking shaft seat (13) to swing through the movable matching frame (21); S4, the lower end of the receiving plate (11) is rotated by rotating the adjusting shaft (17) and the limiting support (18) to achieve angle adjustment of the receiving plate (11) and expand the receiving area. When the receiving plate (11) rotates, the movable matching frame (21) drives the displacement guide rod (14) to follow and adjust on the arc track plate (16). At this time, the in-position sensor (15) can check the position of the displacement guide rod (14) in real time, thereby analyzing the position of the receiving plate (11). The receiving plate (11) is provided with a receiver, which can detect and analyze radar waves, thereby expanding the detection range and better performing the detection work.

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