Nondestructive testing device and method for road surface based on ground penetrating radar and deflectometer

Abstract

The application relates to a pavement nondestructive detection device and method based on a ground penetrating radar and a deflectometer, and belongs to the technical field of pavement nondestructive detection. The detection device comprises a mobile base, a ground penetrating radar for acquiring pavement detection data, a drop hammer deflectometer for acquiring a deflection basin index at a pavement disease position, and a marking structure for marking the pavement disease position. One pavement disease type corresponds to one mark. A controller comprises an information receiving module for receiving the detection data and the deflection basin index, a judgment module for determining the pavement disease position and the corresponding pavement disease type and determining the pavement disease degree, a position acquiring module for acquiring the current position of the drop hammer deflectometer in real time, and a control module for controlling the drop hammer deflectometer to act when the current position matches the pavement disease position and for controlling the marking structure to act after the pavement disease position is determined. The application has the beneficial effect of reducing the core drilling verification step.

Description

Technical Field

[0001] This application relates to the technical field of non-destructive testing of road surfaces, and in particular to a non-destructive testing device and method for road surfaces based on ground penetrating radar and deflectometer. Background Technology

[0002] In related technologies, patent CN115928546A, published on 2023-04-07, discloses a polymer composite grouting method for repairing road surface water damage, the method comprising the following steps:

[0003] Ground-penetrating radar and falling weight deflectometers are used to detect pavement defects, obtaining the type, location, and severity of the defects. The specific steps include:

[0004] Ground-penetrating radar is used to detect pavement defects and determine the type and location of the defects. A falling weight deflectometer is used to measure the defects at the locations to obtain the deflection basin index. The degree of pavement defects corresponding to different types of defects is determined based on the deflection basin index.

[0005] In actual testing, after ground-penetrating radar and falling weight deflectometers detect the road surface, core drilling is usually required at the location of road defects to improve detection accuracy. When using the above-mentioned technologies, although the falling weight deflectometer is used to detect the location of road defects after the ground-penetrating radar determines the location of the road defects, external personnel cannot directly determine the location of the road defects and the corresponding types of road defects, and cannot perform core drilling verification. They can only view the location of the road defects through a host computer and then search for them on the road surface. Therefore, the core drilling verification process is quite cumbersome. Summary of the Invention

[0006] To reduce the core drilling verification steps, this application provides a road surface non-destructive testing device and method based on ground penetrating radar and deflectometer.

[0007] Firstly, this application provides a non-destructive testing device for road surfaces based on ground-penetrating radar and a deflectometer, which adopts the following technical solution:

[0008] A non-destructive road surface testing device based on ground-penetrating radar and deflectometer, comprising:

[0009] A mobile base is installed on the inspection vehicle and moves along the road surface;

[0010] Ground-penetrating radar, installed on the mobile base near the rear of the detection vehicle, is used to acquire road surface detection data;

[0011] A falling weight deflectometer is installed on the movable base away from the rear of the inspection vehicle to obtain the deflection basin index at the location of road surface defects.

[0012] A marking structure is installed on the mobile base and close to the ground penetrating radar to mark the location of the road surface defects. One type of road surface defect corresponds to one marking.

[0013] The controller includes:

[0014] The information receiving module is used to receive the detection data and the deflection basin index;

[0015] The judgment module is used to determine the location of pavement distress and the corresponding type of pavement distress based on the detection data, and to determine the degree of pavement distress based on the deflection basin index.

[0016] The position acquisition module is used to acquire the current position of the falling weight deflectometer in real time.

[0017] The control module is used to control the action of the falling weight deflectometer when the judgment module determines that the current position matches the location of the pavement defect; and to control the action of the marking structure after the judgment module determines the location of the pavement defect.

[0018] By adopting the above technical solution, when the mobile base moves along the road surface, the ground-penetrating radar will detect the road surface, acquire road surface detection data, and analyze the road surface detection data to determine the location and corresponding type of road surface defects. The data is then sent to the controller, which then controls the marking structure to mark the defects. After the falling weight deflectometer reaches the location of the road surface defect, the controller controls the falling weight deflectometer to detect the defects. Because the location of the road surface defects is marked in a timely manner, and each type of road surface defect corresponds to a different mark, external personnel can clearly understand the location of the road surface defects and confirm the type of road surface defects, thereby enabling rapid core drilling and reducing the number of core drilling verification steps.

[0019] Optionally, the tag structure includes:

[0020] A chalk tray is rotatably connected to the movable base along the circumference of the detection radar. The chalk tray is equipped with chalk of various colors, with each color corresponding to a type of road surface defect.

[0021] A baffle plate is rotatably connected to the chalk tray, and the baffle plate has a chalk hole for chalk to pass through.

[0022] A gear drive component is used to drive the rotation of the gear disc;

[0023] A powder driving component is used to drive the rotation of the chalk disk.

[0024] By adopting the above technical solution, the drive component drives the baffle to rotate, so that the chalk hole is coaxial with a certain color of chalk. The chalk passes through the chalk hole and comes into contact with the ground. Thus, after the drive component drives the chalk disk to rotate, the chalk can draw circles on the road surface to mark the location and type of road surface defects.

[0025] Optionally, the powder driving component includes:

[0026] The toothed ring is fixedly connected to the movable base and sleeved on the outside of the ground-penetrating radar;

[0027] The powder gear meshes with the powder gear ring and is rotatably connected to the movable base;

[0028] A powder drive motor is coaxially and fixedly connected to the powder gear, and slidably connected to the movable base; the powder drive motor is communicatively connected to the control module.

[0029] By adopting the above technical solution, after the powder drive motor is started, it will drive the powder gear to rotate, and the powder gear will move along the powder gear ring to perform the marking action.

[0030] Optionally, the gear drive component includes:

[0031] The mounting plate is coaxially rotatably connected to the shaft of the chalk tray; the diameter of the mounting plate is smaller than the diameter of the baffle plate.

[0032] A gear drive motor is mounted on the mounting plate, and its output shaft is coaxially fixedly connected to the gear master gear and is communicatively connected to the control module.

[0033] The driven gear is coaxially sleeved on the rotating shaft of the chalk disk and fixedly connected to the baffle plate, meshing with the main gear; the baffle plate is rotatably connected to the rotating shaft of the chalk disk.

[0034] By adopting the above technical solution, after starting the gear drive motor, the gear drive motor drives the main gear to rotate, and the main gear drives the driven gear to rotate, thereby driving the gear plate to rotate, so that the chalk hole corresponds to different colors of chalk.

[0035] Optionally, the detection device further includes:

[0036] A clamping tube, with one end of the chalk embedded inside the clamping tube; when the chalk first comes into contact with the ground, the end of the clamping tube near the ground can protrude through the chalk hole;

[0037] The clamping blocks are slidably connected to the end face of the baffle near the ground, either facing each other or moving apart.

[0038] A clamping element, disposed on the baffle, is used to drive the sliding of the clamping block;

[0039] A clamping sliding member is mounted on the baffle plate and is used to drive the clamping member to slide closer to or further away from the ground.

[0040] By adopting the above technical solution, when the chalk passes through the chalk hole and comes into contact with the ground, the clamping component will drive the clamping blocks to slide towards each other to clamp the clamping tube. As the chalk is consumed, its length will become shorter and shorter. Therefore, it is necessary to use the clamping sliding component to drive the clamping component to slide towards the ground to ensure that the chalk can always be in contact with the ground during use and improve the utilization rate of the chalk.

[0041] Optionally, the clamping component is a clamping bidirectional cylinder; the clamping sliding component is a clamping sliding cylinder, the clamping sliding cylinder is vertically installed on the side wall of the chalk tray, and the cylinder body of the clamping bidirectional cylinder is horizontally installed on the piston rod of the clamping sliding cylinder.

[0042] Optionally, the detection device further includes:

[0043] A feed turntable is rotatably connected to the movable base; magnets are evenly installed on the feed turntable, and the magnets are used to attract the clamping tube.

[0044] A feeding rotating component is mounted on the movable base and is used to drive the rotation of the feeding turntable;

[0045] A robotic arm is used to grip and flip the clamping tube;

[0046] A camera is used to capture image information of the feeding conveyor belt; the camera, the feeding drive component, and the robot are all communicatively connected to the controller; based on the image information, the controller controls the starting and stopping of the feeding rotation component and controls the robot to grab the clamping tube with the corresponding mark and place it at the corresponding position on the chalk tray.

[0047] By adopting the above technical solution, when replenishment is needed, the controller controls the robot to take out the clamping tube that needs to be replenished, so that the empty magnetic block on the feed turntable can hold the clamping tube, and then the robot is controlled to clamp the new chalk to fill the position, thereby realizing the replenishment.

[0048] Optionally, the feed rotating component includes:

[0049] The feed shaft is rotatably connected to the movable base at one end; the feed turntable is coaxially disposed on the feed shaft.

[0050] The feed gear is coaxially and fixedly connected to the feed shaft;

[0051] The feeding motor is mounted on the movable base, and the output shaft is coaxially fixedly connected to the feeding main gear. The feeding main gear meshes with the feeding driven gear, and the controller is communicatively connected to the feeding motor.

[0052] Optionally, the detection device further includes:

[0053] A connecting shaft has a connecting block hinged to one end, and the connecting block is slidably connected to the feed shaft via a groove; the other end of the connecting shaft is fixedly connected to the feed turntable; initially, the hinge point between the connecting shaft and the connecting block is located inside the feed shaft.

[0054] The tension spring has one end attached to the inner wall of the feed shaft and the other end attached to the connecting block.

[0055] By adopting the above technical solution, when it is necessary to feed the feed turntable, the feed turntable can be pulled to make the hinge point slide out of the feed shaft, and then the feed turntable can be rotated, so that the axis of the feed turntable changes from vertical to horizontal, which facilitates feeding the feed turntable.

[0056] Secondly, this application provides a non-destructive testing method for road surfaces based on ground-penetrating radar and a deflectometer, employing the following technical solution:

[0057] A non-destructive testing method for road surfaces based on ground-penetrating radar and deflectometer, comprising:

[0058] Receive detection data from ground-penetrating radar;

[0059] Based on the detection data, the type and location of pavement defects are determined;

[0060] The control marking structure marks the location of the pavement defects, with one mark corresponding to one type of pavement defect;

[0061] Obtain the current position of the falling weight deflectometer;

[0062] When the current position matches the marked position, the falling weight deflectometer is controlled to perform deflection detection;

[0063] Receive deflection basin index;

[0064] The degree of pavement distress is determined based on the deflection basin index.

[0065] By adopting the above technical solution, after receiving pavement detection data, the data is analyzed to determine the location and corresponding type of pavement distress. A marking structure is then controlled to mark the distress. After the falling weight deflectometer reaches the distress location, it is used for detection. Because the distress locations are marked promptly, and each distress type corresponds to a specific mark, external personnel can clearly understand the distress location and confirm the distress type, enabling rapid core drilling and thus reducing the number of core drilling verification steps.

[0066] In summary, this application has at least the following beneficial effects:

[0067] The purpose of setting up the marking structure is to promptly mark the location of road surface defects, with one mark corresponding to each type of road surface defect. This allows external personnel to clearly understand the location of road surface defects and confirm their type, thus enabling rapid core drilling and reducing the number of core drilling verification steps. Attached Figure Description

[0068] Figure 1 This is a schematic diagram of the overall structure of the device embodiment of this application;

[0069] Figure 2 This is a structural diagram showing the positional relationship between the robotic arm and the feed turntable;

[0070] Figure 3 This is a structural diagram showing the connection relationship between the movable base, the chalk tray, and the baffle plate;

[0071] Figure 4 This is a structural diagram showing the connection between the chalk tray and the baffle plate;

[0072] Figure 5 It mainly shows the structural schematic diagrams of the clamping components and the clamping sliding components;

[0073] Figure 6 It is a block diagram of the control system;

[0074] Figure 7 This is a flowchart of an embodiment of the method of this application.

[0075] Explanation of reference numerals in the attached drawings: 100, movable base; 110, robotic arm; 120, camera; 200, ground-penetrating radar; 300, falling weight deflectometer; 400, marking structure; 410, feed turntable; 411, magnet; 412, clamping tube; 413, chalk; 420, feed drive component; 421, feed shaft; 422, feed motor; 423, connecting shaft; 424, tension spring; 425, feed main gear; 426, feed driven gear; 427, connecting block; 430, chalk tray; 440, baffle plate; 441. Chalk hole; 450, gear drive component; 451, mounting plate; 452, gear drive motor; 453, driven gear; 454, main gear; 460, chalk drive component; 461, chalk gear ring; 462, chalk gear; 463, chalk drive motor; 464, support rod; 465, moving cylinder; 470, clamping block; 471, clamping component; 472, clamping sliding component; 500, controller; 501, information receiving module; 502, judgment module; 503, position acquisition module; 504, control module; 600, display screen. Detailed Implementation

[0076] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will be described in conjunction with the appendices in the embodiments of the present invention. Figure 1 -Appendix Figure 7 The technical solutions in the embodiments of the present invention are clearly and completely described herein. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0077] One embodiment of this application discloses a non-destructive testing device for road surfaces based on ground-penetrating radar and a deflectometer. (Refer to...) Figure 1 As one embodiment of the detection device, the detection device may include a movable base 100, a ground penetrating radar 200, a falling weight deflectometer 300, and a marking structure 400.

[0078] The mobile base 100 is installed at the rear of the detection vehicle, and is moved along the road surface by the movement of the detection vehicle. A bracket is fixedly connected to the ground penetrating radar 200, and the bracket is bolted to the mobile base 100 near the rear of the detection vehicle to acquire road surface detection data.

[0079] The falling weight deflectometer 300 is bolted to the movable base 100 at a location away from the vehicle being inspected, and is used to obtain the deflection basin index at the location of road surface defects; and the ground penetrating radar 200 shares the same centerline with the falling weight deflectometer 300.

[0080] The marking structure 400 is installed on the mobile base 100 and is positioned close to the ground penetrating radar 200 to mark the location of road surface defects. It should be noted that one type of road surface defect corresponds to one type of marking.

[0081] Reference Figure 2 The marking structure 400 may include a feed turntable 410 and a feed drive component 420.

[0082] The feeding turntable 410 is horizontally rotatably connected to the movable base 100, and magnets 411 are uniformly fixedly connected to the end face of the feeding turntable 410 along the circumference. The feeding drive component 420 is mounted on the movable base 100 and is used to drive the rotation of the feeding turntable 410.

[0083] The feeding drive component 420 may include a feeding shaft 421, a feeding motor 422, a connecting shaft 423, and a tension spring 424.

[0084] One end of the feed shaft 421 is rotatably connected to the movable base 100, and a feed driven gear 426 is coaxially fixedly connected thereto. The feed motor 422 is bolted to the movable base 100, and a feed main gear 425 is coaxially fixedly connected to its output shaft. The feed main gear 425 meshes with the feed driven gear 426.

[0085] A connecting block 427 is hinged to one end of the connecting shaft 423, and the connecting block 427 is slidably connected to the inner wall of the feed shaft 421 via a groove; the feed turntable 410 is coaxially fixedly connected to the other end of the connecting shaft 423. Initially, the hinge point between the connecting shaft 423 and the connecting block 427 is inside the feed shaft 421. One end of the tension spring 424 is hooked to the inner wall of the feed shaft 421, and the other end is hooked to the connecting block 427.

[0086] The detection device also includes a clamping tube 412 and chalk 413; one end of the clamping tube 412 is attached to a magnet 411, and one end of the chalk 413 is embedded in the other end of the clamping tube 412. The chalk 413 is colored chalk, and various colors of chalk 413 are provided on the feed turntable 410. In addition, a robotic arm 110 is also installed on the movable base 100. The robotic arm 110 is a common robotic arm with functions such as clamping, lifting, and rotating, and can clamp the clamping tube 412 and drive the clamping tube 412 to lift and rotate.

[0087] Reference Figure 3 and Figure 4 The marking structure 400 may also include a chalk tray 430, a baffle 440, a baffle drive component 450, and a chalk drive component 460.

[0088] The chalk tray 430 is rotatably connected to the movable base 100 along the circumference of the ground penetrating radar 200. Multiple colors of chalk 413 are placed circumferentially on the chalk tray 430, each color corresponding to a type of road surface defect. A baffle plate 440 is rotatably connected to the chalk tray 430. A chalk hole 441 is provided on the baffle plate 440 for the chalk 413 to pass through. When the baffle plate 440 rotates, the chalk hole 441 becomes coaxial with a particular color of chalk 413, allowing the chalk 413 to contact the ground through the chalk hole 441. A baffle drive component 450 drives the rotation of the baffle plate 440, and a chalk drive component 460 drives the rotation of the chalk tray 430.

[0089] The powder drive component 460 may include a powder gear ring 461, a powder gear 462, and a powder drive motor 463.

[0090] The powder gear ring 461 has a support rod 464 fixedly connected to its end face. The support rod 464 is horizontally slidably connected to the movable base 100. The powder gear ring 461 is sleeved on the outside of the ground penetrating radar 200. The powder gear 462 meshes with the powder gear ring 461. The output shaft of the powder drive motor 463 is coaxially and fixedly connected to the powder gear 462. The powder drive motor 463 is slidably connected to the movable base 100 through an annular groove.

[0091] To enable the sliding of the support rod 464, a movable cylinder 465 is bolted to the bracket of the ground penetrating radar 200. The piston rod of the movable cylinder 465 is fixedly connected to the support rod 464. The movable cylinder 465 drives the powder gear ring 461 to disengage from the powder gear 462, thereby starting the powder drive motor 463 and driving the chalk tray 430 to rotate, allowing the robot arm 110 to feed the chalk tray 430. Additionally, a feeding cavity is provided on the movable base 100 to facilitate feeding by the robot arm 110, thus preventing the clamping tube 412 and chalk 413 from being unable to be installed on the chalk tray 430 when the robot arm 110 feeds the chalk. The movable cylinder 465 can be powered by an air pump.

[0092] The gear drive component 450 may include a mounting plate 451, a gear drive motor 452, and a gear driven 453.

[0093] The mounting plate 451 is coaxially rotatably connected to the shaft of the chalk tray 430. The diameter of the mounting plate 451 is smaller than the diameter of the baffle plate 440, so the chalk 413 does not need to contact the mounting plate 451. The baffle drive motor 452 is bolted to the mounting plate 451, and its output shaft is coaxially fixedly connected to the main baffle gear 454. The driven baffle gear 453 is coaxially sleeved on the shaft of the chalk tray 430 and fixedly connected to the baffle plate 440, and meshes with the main baffle gear 454. The baffle plate 440 is coaxially rotatably connected to the shaft of the chalk tray 430. It should be noted that the end of the clamping tube 412 on the chalk 413 that first comes into contact with the ground can extend through the chalk hole 441; "first time" refers to the time when the chalk 413 has not yet been consumed.

[0094] Reference Figure 5 On the end face of the baffle 440 near the ground, a clamping block 470 adapted to the clamping tube 412 is slidably connected, either facing or moving away from it. The clamping block 470 is used to clamp the clamping tube 412. A clamping member 471 is installed on the baffle 440, which is used to drive the sliding of the clamping block 470. In addition, a clamping sliding member 472 is also installed on the baffle 440, which is used to drive the clamping member 471 to slide closer to or further away from the ground.

[0095] The clamping component 471 can be a clamping bidirectional cylinder, and the clamping sliding component 472 can be a clamping sliding cylinder. The clamping sliding cylinder is vertically mounted on the end face of the baffle 440 by bolts, and the cylinder body of the clamping bidirectional cylinder is horizontally mounted on the piston rod of the clamping sliding cylinder. Additionally, the clamping component 471 and the clamping block 470 can also be mounted on the end face of the baffle 440 away from the ground to clamp and limit the clamping tube 412 that has not passed through the chalk hole 441. Both the clamping bidirectional cylinder and the clamping sliding cylinder can be powered by an air pump.

[0096] Reference Figure 6As another embodiment of the detection device, the detection device may also include a controller 500 and a camera 120; wherein, the camera 120 is mounted on the movable base 100 and is used to collect images around the feed turntable 410 and the chalk tray 430; the controller 500 is communicatively connected to the camera 120, the feed motor 422, the robot arm 110, the gear drive motor 452, the powder drive motor 463, the clamping member 471, and the clamping sliding member 472; when the controller 500 determines that the chalk tray 430 needs to be replenished based on the images, it controls the robot arm 110 to clamp the clamping tube 412 at the replenishment position, and the clamping tube 412 is attracted to the free magnet 411 on the feed turntable 410, and then the new clamping tube 412 of this type on the feed turntable 410 is placed at the corresponding position of the chalk tray 430 to realize the replenishment. When chalk 413 contacts the ground through chalk hole 441, controller 500 controls the retraction of clamping bidirectional cylinder to clamp clamping block 470 onto clamping tube 412. When chalk 413 is consumed, if chalk 413 is no longer in contact with the ground, clamping sliding cylinder can be controlled to extend to drive chalk 413 to contact the ground. Additionally, the detection device may include a display screen 600, mounted at the rear of the detection vehicle and communicatively connected to controller 500, for cyclically displaying marking information, including marking color, associated road surface defect location, and associated road surface defect type.

[0097] The controller 500 may also include:

[0098] Information receiving module 501 is used to receive detection data and deflection basin index;

[0099] The judgment module 502 is used to determine the location of pavement defects and the corresponding pavement defect type based on the detection data, and to determine the degree of pavement defects based on the deflection basin index.

[0100] The position acquisition module 503 is used to acquire the current position of the falling weight deflectometer 300 in real time;

[0101] The control module 504 is used to control the marking structure 400 to move after the judgment module 502 determines the location of the road surface defect, so that the chalk 413 corresponding to the type of road surface defect passes through the chalk hole 441; and to control the falling weight deflectometer 300 to move when the judgment module 502 determines that the current position matches the marking position.

[0102] The implementation principle of this embodiment is as follows:

[0103] As the vehicle moves along the road with the mobile base 100, the ground-penetrating radar 200 detects the road surface and sends the detection data to the controller 500. The controller 500 determines the location and type of road surface defects based on the detection data. Then, the controller 500 starts the gear drive motor 452 and, combined with the image captured by the camera 120, rotates the gear plate 440 to the position of the chalk 413 corresponding to the type of road surface defect. Afterward, it controls the clamping bidirectional cylinder to retract, unlocking the clamping tube 412, and the chalk 413 passes through the chalk hole 4. 41 contacts the ground, and then the clamping bidirectional cylinder on the end face of the baffle 440 near the ground extends to clamp the clamping tube 412; then the powder drive motor 463 is started, and the powder drive motor 463 drives the powder gear 462 to rotate, thereby marking the location of the road surface defect; at the same time, the controller 500 will obtain the current position of the falling weight deflectometer 300 in real time, and when the current position matches the marked position, the controller controls the falling weight deflectometer 300 to perform detection and receive the deflection basin index. Based on the deflection basin index, the degree of road surface defect is determined.

[0104] Based on the above-described device embodiments, another embodiment of this application discloses a non-destructive testing method for road surfaces based on a ground-penetrating radar 200 and a deflectometer. (Refer to...) Figure 7 As one embodiment of the detection method, the detection method may include S101-S107:

[0105] S101 receives detection data from the ground-penetrating radar 200;

[0106] S102, Based on the detection data, determine the type and location of pavement defects;

[0107] S103, the control marking structure 400 marks the location of pavement defects, with one mark corresponding to one type of pavement defect;

[0108] S104, Obtain the current position of the falling weight deflectometer 300;

[0109] S105, when the current position matches the position of the mark, control the falling weight deflectometer 300 to perform deflection detection;

[0110] S106, receiving deflection basin index;

[0111] S107, the degree of pavement distress is determined based on the deflection basin index.

[0112] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Any feature disclosed in this specification (including the abstract and drawings) may be replaced by other equivalent or similar features unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is only one example of a series of equivalent or similar features.

Claims

1. A non-destructive testing device for road surfaces based on ground-penetrating radar and a deflectometer, characterized in that, include: A mobile base (100) is installed on the inspection vehicle and moves along the road surface; Ground-penetrating radar (200) is installed on the mobile base (100) near the rear of the detection vehicle to acquire road surface detection data; A falling weight deflectometer (300) is installed on the movable base (100) away from the rear of the test vehicle to obtain the deflection basin index at the location of road surface defects. A marking structure (400) is installed on the mobile base (100) and close to the ground penetrating radar (200) for marking the location of the road surface defects. One type of road surface defect corresponds to one marking. The controller (500) includes: Information receiving module (501) is used to receive the detection data and the deflection basin index; The judgment module (502) is used to determine the location of pavement distress and the corresponding type of pavement distress based on the detection data, and to determine the degree of pavement distress based on the deflection basin index. The position acquisition module (503) is used to acquire the current position of the falling weight deflectometer (300) in real time; The control module (504) is used to control the falling weight deflectometer (300) to operate when the judgment module (502) determines that the current position matches the location of the road surface defect; and to control the marking structure (400) to operate after the judgment module (502) determines the location of the road surface defect. The marker structure (400) includes: The chalk tray (430) is rotatably connected to the movable base (100) along the circumference of the ground penetrating radar. The chalk tray (430) is equipped with chalk (413) of various colors, with each color corresponding to a type of road surface defect. A baffle plate (440) is rotatably connected to the chalk tray (430), and a chalk hole (441) is provided on the baffle plate (440) for the chalk (413) to pass through. A gear drive component (450) is used to drive the rotation of the gear disc (440); A powder driving component (460) is used to drive the rotation of the chalk disk (430); The detection device further includes: A clamping tube (412) is used, with one end of the chalk (413) embedded inside the clamping tube (412); when the chalk (413) first comes into contact with the ground, the end of the clamping tube (412) near the ground can pass through the chalk hole (441). Clamping blocks (470) are slidably connected to the end face of the baffle (440) near the ground, either facing each other or moving apart; A clamping member (471) is disposed on the baffle (440) and is used to drive the clamping block (470) to slide. A clamping sliding member (472) is mounted on the baffle (440) for driving the clamping member (471) to slide closer to or further away from the ground.

2. The road surface non-destructive testing device based on ground penetrating radar and deflectometer according to claim 1, characterized in that, The powder driving component (460) includes: The powder tooth ring (461) is fixedly connected to the movable base (100) and sleeved on the outside of the ground penetrating radar (200); The powder gear (462) meshes with the powder gear ring (461) and is rotatably connected to the movable base (100); The powder drive motor (463) is coaxially fixedly connected to the powder gear (462) and slidably connected to the movable base (100); the powder drive motor (463) is communicatively connected to the control module (504).

3. The road surface non-destructive testing device based on ground penetrating radar and deflectometer according to claim 2, characterized in that, The gear drive component (450) includes: The mounting plate (451) is coaxially rotatably connected to the shaft of the chalk tray (430); the diameter of the mounting plate (451) is smaller than the diameter of the baffle plate (440); A gear drive motor (452) is mounted on the mounting plate (451), and its output shaft is coaxially fixedly connected to a gear main gear (454), and is communicatively connected to the control module (504); The driven gear (453) is coaxially sleeved on the rotating shaft of the chalk disk (430) and fixedly connected to the baffle (440), and meshes with the main gear (454); the baffle (440) is coaxially rotatably connected to the rotating shaft of the chalk disk (430).

4. The road surface non-destructive testing device based on ground penetrating radar and deflectometer according to claim 1, characterized in that, The clamping component (471) is a clamping bidirectional cylinder; the clamping sliding component (472) is a clamping sliding cylinder. The clamping sliding cylinder is vertically installed on the side wall of the chalk tray (430), and the cylinder body of the clamping bidirectional cylinder is horizontally installed on the piston rod of the clamping sliding cylinder.

5. A non-destructive testing device for road surfaces based on ground-penetrating radar and a deflectometer according to claim 1, characterized in that, The detection device further includes: A feed turntable (410) is rotatably connected to the movable base (100); magnets (411) are evenly installed on the feed turntable (410), and the magnets (411) are used to attract the clamping tube (412). A feeding drive component (420) is mounted on the movable base (100) and is used to drive the rotation of the feeding turntable (410); A robotic arm (110) is used to grip and flip the clamping tube (412). A camera (120) is used to collect image information at the feed turntable (410) and the chalk tray (430); the camera (120), the feed drive component (420) and the robot (110) are all communicatively connected to the controller (500); the controller (500) controls the start and stop of the feed drive component (420) and controls the robot (110) to grab the corresponding marked clamping tube (412) and place it at the corresponding position of the chalk tray (430) based on the image information.

6. A road surface non-destructive testing device based on ground-penetrating radar and deflectometer according to claim 5, characterized in that, The feed drive component (420) includes: The feed shaft (421) is rotatably connected at one end to the movable base (100); the feed turntable (410) is coaxially arranged on the feed shaft (421); The feed gear (426) is coaxially fixedly connected to the feed shaft (421); The feed motor (422) is mounted on the movable base (100), and the output shaft is coaxially fixedly connected to the feed main gear (425). The feed main gear (425) meshes with the feed driven gear (426). The controller (500) is communicatively connected to the feed motor (422).

7. A non-destructive testing device for road surface based on ground-penetrating radar and deflectometer according to claim 6, characterized in that, The detection device further includes: A connecting shaft (423) has a connecting block (427) hinged at one end. The connecting block (427) is slidably connected to the feed shaft (421) through a groove. The other end of the connecting shaft (423) is fixedly connected to the feed turntable (410). In the initial case, the hinge point between the connecting shaft (423) and the connecting block (427) is located inside the feed shaft (421). The tension spring (424) is attached at one end to the inner wall of the feed shaft (421) and at the other end to the connecting block (427).

8. A method for non-destructive testing of road surfaces based on ground-penetrating radar and deflectometer, applicable to the non-destructive testing device for road surfaces based on ground-penetrating radar and deflectometer as described in any one of claims 1-7, comprising: Receive detection data from ground-penetrating radar (200); Based on the detection data, the type and location of pavement defects are determined; The control marking structure (400) marks the location of the pavement distress, with one mark corresponding to one type of pavement distress; Obtain the current position of the falling weight deflectometer (300); When the current position matches the marked position, the falling weight deflectometer (300) is controlled to perform deflection detection; Receive deflection basin index; The degree of pavement distress is determined based on the deflection basin index.

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