Road detection device based on three-dimensional ground penetrating radar

Abstract

The invention discloses a road detection device based on a three-dimensional ground penetrating radar, and relates to the technical field of road detection.The road detection device comprises a vehicle frame, universal wheels are installed on the periphery of the lower end face of the vehicle frame, and a hand pushing frame is installed on one side of the vehicle frame and used for pushing the road detection device; the three-dimensional ground penetrating radar equipment is mounted on the vehicle frame and is used for detecting a road; the accumulated water removing mechanism is installed on the vehicle frame and located on the front side of the three-dimensional ground penetrating radar equipment, and the accumulated water removing mechanism is used for removing accumulated water on the ground and improving the detection precision of the three-dimensional ground penetrating radar equipment; through the arrangement of the accumulated water removing mechanism, accumulated water can be removed in advance in a detection area where the front side of the three-dimensional ground penetrating radar equipment needs to pass in the moving process of the frame, so that a thick accumulated water layer on the surface of a road is eliminated, and the detection precision of the three-dimensional ground penetrating radar equipment can be effectively improved.

Description

Technical Field

[0001] This invention relates to the field of road detection technology, and more specifically to a road detection device based on three-dimensional ground-penetrating radar. Background Technology

[0002] 3D ground-penetrating radar (GPR) is a non-destructive testing technology that uses high-frequency electromagnetic waves to detect the internal structure of roads. Its working principle is as follows: electromagnetic pulses are emitted into the ground via an antenna. When the waves encounter media with different dielectric constants (such as voids, delamination, or pipelines), they generate reflected echoes that are captured by the receiving antenna. The system records the amplitude and two-way travel time of the echoes to invert the distribution characteristics of the underground media. During the detection process, the equipment typically uses an array antenna to continuously move along the survey line to collect data. High-resolution 3D images are then generated using synthetic aperture imaging (SAR) technology, which can visually reveal the thickness of road structural layers, the location of defects, and the morphology of buried objects, providing crucial information for road health assessment and maintenance.

[0003] Currently, 3D ground-penetrating radar (GPR) is often mounted on a hand-pushed cart, which is used to detect road movement. When there is standing water on the road, the water layer significantly negatively impacts the detection performance of 3D GPR. The high dielectric constant of the water layer strongly reflects most of the incident electromagnetic wave energy, greatly weakening the signal strength penetrating the ground and drastically reducing the effective detection depth. Simultaneously, multiple reflections from the water generate strong interference clutter, masking the true, weak echo signals from within the road structure (such as voids, cracks, or the base layer), significantly increasing the difficulty and uncertainty of data interpretation. Furthermore, the propagation speed of electromagnetic waves changes in water; without accurate velocity correction, this can lead to inaccurate judgments of target depth and location. Therefore, a road detection device based on 3D GPR is needed to address these problems. Summary of the Invention

[0004] The purpose of this invention is to provide a road detection device based on three-dimensional ground-penetrating radar to solve the problems existing in the prior art mentioned in the background section.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A road detection device based on three-dimensional ground-penetrating radar, comprising:

[0007] The vehicle frame is equipped with casters around its lower end face and a pusher frame is installed on one side of the vehicle frame for pushing the road detection device.

[0008] A three-dimensional ground-penetrating radar device, which is mounted on a vehicle frame and used to detect roads;

[0009] A water removal mechanism is mounted on the vehicle frame and located at the front of the three-dimensional ground-penetrating radar device. The water removal mechanism is used to remove water from the ground and improve the detection accuracy of the three-dimensional ground-penetrating radar device.

[0010] Preferably, there are two water removal mechanisms, which are located on the left and right sides of the vehicle frame, respectively, to drain road water to the left and right sides of the vehicle frame.

[0011] Preferably, the water removal mechanism includes a mounting base, a drive shaft, and a connecting block. The mounting base is installed on the front and rear sides of the opening on the bottom surface of the vehicle frame. The drive shaft is rotatably connected to the mounting base, and the connecting block is keyed to the drive shaft.

[0012] The connecting block is equipped with sleeves at equal intervals around its side circumference. A telescopic rod is movably and telescopically connected inside the sleeve. A spring is provided inside the sleeve to push the telescopic rod outward. A cleaning component is installed at the other end of the telescopic rod.

[0013] Preferably, the cleaning assembly includes a connecting plate, a water-absorbing block, and a water-pushing strip. The connecting plate is fixedly connected to the end of the telescopic rod, and the water-absorbing block and the water-pushing strip are installed on the connecting plate. The water-pushing strip is located on one side of the water-absorbing block.

[0014] Preferably, the water removal mechanism further includes a drainage block and a drive mechanism. The drainage block is installed on both sides of the vehicle frame and is used to squeeze and drain the water from the water-absorbing block. The drive mechanism is used to drive the two drive shafts to rotate in opposite directions respectively.

[0015] Preferably, the drive mechanism includes a transmission box and a drive motor. The transmission box is mounted on the vehicle frame, the output end of the transmission box is connected to the drive shaft, and the input end of the transmission box is equipped with the drive motor.

[0016] Preferably, the hand-operated frame is equipped with a mounting bracket for placing the data acquisition computer.

[0017] Preferably, a support rod is installed on one side of the push frame, and an RTK head is installed on the top of the support rod.

[0018] Compared with the prior art, the beneficial effects of the present invention are:

[0019] 1. By setting up a water removal mechanism, the present invention can pre-remove water from the detection area that the front side of the three-dimensional ground penetrating radar equipment needs to pass through during the movement of the vehicle frame, thereby eliminating the thick water layer on the road surface and effectively improving the detection accuracy of the three-dimensional ground penetrating radar equipment.

[0020] 2. The present invention uses a drainage block in the water removal mechanism to drain water during the rotation of the water absorption block, ensuring that the water absorption block is in a low water absorption state in the next cycle, which facilitates the adsorption of residual water on the road surface and thus improves the effect of removing water from the road surface. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0022] Figure 2 This is a schematic diagram of the bottom structure of the vehicle frame of the present invention.

[0023] Figure 3 This is a schematic diagram of the front view of the vehicle frame structure of the present invention.

[0024] Figure 4 This is a schematic diagram of the water removal mechanism of the present invention.

[0025] Figure 5 This is a schematic diagram of the cleaning component structure of the present invention.

[0026] In the diagram: 1. Frame; 2. Casters; 3. Hand-push frame; 4. Placement rack; 5. Support rod; 6. RTK head; 7. 3D ground-penetrating radar equipment; 8. Water removal mechanism; 81. Mounting base; 82. Drive shaft; 83. Connecting block; 84. Sleeve; 85. Telescopic rod; 86. Connecting plate; 87. Water-absorbing block; 88. Water-pushing strip; 89. Drainage block; 9. Drive mechanism; 91. Transmission box; 92. Drive motor. Detailed Implementation

[0027] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0028] Please see Figure 1-5 The present invention provides the following technical solutions:

[0029] A road detection device based on three-dimensional ground-penetrating radar includes: a frame 1, with casters 2 installed around the lower end face of the frame 1, and a pusher 3 installed on one side of the frame 1 for pushing the road detection device; a mounting rack 4 for placing a data acquisition computer is provided on the pusher 3; a support rod 5 is installed on one side of the pusher 3, and an RTK head 6 is installed on the top of the support rod 5; and a three-dimensional ground-penetrating radar device 7, which is mounted on the frame 1 and used for road detection; the mounting rack 4 and the support rod 5 facilitate the placement and installation of related auxiliary equipment for the three-dimensional ground-penetrating radar device 7.

[0030] The water removal mechanism 8 is installed on the frame 1 and located at the front of the 3D ground penetrating radar device 7. The water removal mechanism 8 is used to remove water from the ground and improve the detection accuracy of the 3D ground penetrating radar device 7. There are two water removal mechanisms 8, which are located on the left and right sides of the inside of the frame 1, respectively. They are used to drain the water from the road to the left and right sides of the frame 1, which helps to improve the effect of removing water from the road in front of the 3D ground penetrating radar device 7.

[0031] The water removal mechanism 8 includes a mounting base 81, a drive shaft 82, and a connecting block 83. The mounting base 81 is installed on the front and rear sides of the opening on the bottom surface of the frame 1. The drive shaft 82 is rotatably connected to the mounting base 81, and the connecting block 83 is keyed to the drive shaft 82. The connecting block 83 has sleeves 84 equidistantly installed on its side circumference. A telescopic rod 85 is movably and telescopically connected inside the sleeve 84. A spring is provided inside the sleeve 84 to push the telescopic rod 85 outward. A cleaning component is installed at the other end of the telescopic rod 85. The telescopic rod 85 can slide and extend within the sleeve 84, and the spring pushes the telescopic rod 85, so that the cleaning component is always in contact with the ground during cleaning, thus draining the water to both sides of the frame 1.

[0032] The cleaning assembly includes a connecting plate 86, a water-absorbing block 87, and a water-pushing strip 88. The connecting plate 86 is fixedly connected to the end of the telescopic rod 85. The water-absorbing block 87 and the water-pushing strip 88 are installed on the connecting plate 86. The water-pushing strip 88 is located on one side of the water-absorbing block 87. The water-absorbing block 87 is made of water-absorbing materials such as sponge or cotton, and the water-pushing strip 88 is made of flexible rubber material. During the water removal process, the water-pushing strip 88 is located in front of the water-absorbing block 87. The water-pushing strip 88 first scrapes away most of the accumulated water, and then the water-absorbing block 87 absorbs the remaining water on the ground.

[0033] In addition to the water accumulation mechanism 8, it also includes a drainage block 89 and a drive mechanism 9. The drainage block 89 is installed on both sides of the frame 1 and is used to squeeze and drain the water absorption block 87. When the water absorption block 87 rotates to the position of the drainage block 89, the drainage block 87 is squeezed and drained under the guidance of the drainage block 89, which facilitates the next cycle of water absorption operation of the water absorption block 87.

[0034] The drive mechanism 9 is used to drive two drive shafts 82 to rotate in the forward and reverse directions respectively. The drive mechanism 9 includes a transmission box 91 and a drive motor 92. The transmission box 91 is mounted on the frame 1. The output end of the transmission box 91 is connected to the drive shaft 82. The input end of the transmission box 91 is equipped with the drive motor 92. The transmission box 91 is a gear transmission box.

[0035] The working process of this invention is as follows:

[0036] When it is necessary to use 3D ground penetrating radar to detect roads, first install the 3D ground penetrating radar device 7 at the designated position on the vehicle frame 1, and place the RTK head 6, acquisition computer, power supply and other related auxiliary equipment on the vehicle frame 1, connect the wiring harness, start the 3D ground penetrating radar device 7, and push the detection device to move by the pusher 3 to realize the detection of the road.

[0037] When water accumulation is detected on the road, the drive motor 92 is started. The drive motor 92 drives two drive shafts 82 to rotate in opposite directions through the transmission box 91. The drive shafts 82 drive the connecting block 83 to rotate, so that the connecting block 83 drives the connecting plate 86 to rotate through the sleeve 84 and the telescopic rod 85. The water-pushing strip 88 on the connecting plate 86 first contacts the road surface and pushes the water accumulation towards the side of the frame 1. The water-absorbing block 87 then contacts the road surface and absorbs the residual water on the road surface, thus facilitating the detection of the three-dimensional ground penetrating radar equipment 7.

[0038] When the water-absorbing block 87 passes the position of the drainage block 89, the arc-shaped edge on the drainage block 89 guides the water-absorbing block 87 and causes the water-absorbing block 87 to be squeezed, thereby draining the water absorbed in the water-absorbing block 87 to the side of the frame 1, which facilitates the next cycle of water absorption by the water-absorbing block 87, thereby improving the effect of removing water accumulation on the road surface.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A road detection device based on three-dimensional ground-penetrating radar, characterized in that, include: A frame (1) is provided with casters (2) around the lower end face of the frame (1) and a push frame (3) is provided on one side of the frame (1) for pushing the road detection device. A three-dimensional ground-penetrating radar device (7) is mounted on a vehicle frame (1) and used to detect roads; The water removal mechanism (8) is mounted on the vehicle frame (1) and located at the front of the three-dimensional ground penetrating radar device (7). The water removal mechanism (8) is used to remove water from the ground and improve the detection accuracy of the three-dimensional ground penetrating radar device (7).

2. The road detection device based on three-dimensional ground-penetrating radar according to claim 1, characterized in that: Two water removal mechanisms (8) are provided, and the two water removal mechanisms (8) are located on the left and right sides of the inside of the vehicle frame (1) respectively, for discharging road water to the left and right sides of the vehicle frame (1).

3. The road detection device based on three-dimensional ground-penetrating radar according to claim 1, characterized in that: The water removal mechanism (8) includes a mounting base (81), a drive shaft (82), and a connecting block (83). The mounting base (81) is installed on the front and rear sides of the bottom opening of the frame (1). The drive shaft (82) is rotatably connected to the mounting base (81). The connecting block (83) is keyed to the drive shaft (82). The connecting block (83) is equidistantly fitted with sleeves (84) on its side circumference. A telescopic rod (85) is movably and telescopically connected inside the sleeve (84). A spring is provided inside the sleeve (84) to push the telescopic rod (85) outward. A cleaning component is installed at the other end of the telescopic rod (85).

4. A road detection device based on three-dimensional ground-penetrating radar according to claim 3, characterized in that: The cleaning assembly includes a connecting plate (86), a water-absorbing block (87), and a water-pushing strip (88). The connecting plate (86) is fixedly connected to the end of the telescopic rod (85). The water-absorbing block (87) and the water-pushing strip (88) are installed on the connecting plate (86), and the water-pushing strip (88) is located on one side of the water-absorbing block (87).

5. A road detection device based on three-dimensional ground-penetrating radar according to claim 4, characterized in that: The water removal mechanism (8) also includes a drainage block (89) and a drive mechanism (9). The drainage block (89) is installed on both sides of the frame (1) and is used to squeeze the water-absorbing block (87) to drain water. The drive mechanism (9) is used to drive the two drive shafts (82) to rotate in opposite directions respectively.

6. A road detection device based on three-dimensional ground-penetrating radar according to claim 5, characterized in that: The drive mechanism (9) includes a transmission box (91) and a drive motor (92). The transmission box (91) is mounted on the frame (1). The output end of the transmission box (91) is connected to the drive shaft (82). The input end of the transmission box (91) is equipped with the drive motor (92).

7. A road detection device based on three-dimensional ground-penetrating radar according to claim 1, characterized in that: The hand-operated frame (3) is equipped with a mounting bracket (4) for placing the data acquisition computer.

8. A road detection device based on three-dimensional ground-penetrating radar according to claim 1, characterized in that: A support rod (5) is installed on one side of the push frame (3), and an RTK head (6) is installed on the top of the support rod (5).

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