Damping arm for vehicle-mounted ground penetrating radar and vehicle

Abstract

The invention provides a damping arm for a vehicle-mounted ground penetrating radar and a vehicle. The damping arm comprises a connecting support, a first damping assembly, a second damping assembly and a holder assembly. The first damping assembly comprises a first connecting base, a second connecting base, a first buffering piece, a first hinge rod and a second hinge rod, and the first hinge rod and the second hinge rod are hinged to the first connecting base and the second connecting base. Two ends of the first buffer piece are respectively connected with one end, hinged to the first connecting seat, of the first hinge rod and one end, hinged to the second connecting seat, of the second hinge rod; the connecting support is connected with the first connecting seat; the second damping assembly comprises a third connecting base, a fourth connecting base and a second buffering piece, the third connecting base is connected with the second connecting base, the fourth connecting base is hinged to the third connecting base, and the two ends of the second buffering piece are hinged to the third connecting base and the fourth connecting base respectively; the holder assembly is hinged to the lower end of the fourth connecting base. According to the invention, the vibration interference of the vehicle-mounted ground penetrating radar test can be reduced, and the data acquisition accuracy and reliability are improved.

Description

Technical Field

[0001] The invention relates to a road bridge detection technology, in particular to a shock absorbing arm and a vehicle for a vehicle-mounted ground penetrating radar. Background Art

[0002] Ground penetrating radar, as a nondestructive testing technology based on high-frequency electromagnetic waves, is widely used in the nondestructive testing and evaluation of large-scale transportation infrastructure such as roads, bridges, and tunnels. Ground penetrating radar excites high-frequency electromagnetic waves through a controller and transmits them to the target to be detected through an antenna. The difference in electrical properties, especially dielectric properties, of different materials inside the target to be detected forms reflected electromagnetic waves, which are received by the antenna of the ground penetrating radar and converted into digital signals. By analyzing the difference in echo propagation time, amplitude, and waveform between the reflected electromagnetic wave signal from the inside of the pavement structure and the incident wave, the internal information and hidden defects (such as cracks and subsidence) of the road structure can be determined. At the same time, parameters such as thickness, density, and water content of the road structure can be determined through signal processing analysis.

[0003] The advantages of ground penetrating radar are its fast detection speed, ability to penetrate the surface of the object being detected, large coverage area, and non-contact high-speed measurement using air-coupled antennas. At present, the main detection methods of ground penetrating radar include handheld, trolley, and vehicle-mounted. In the detection application of road and bridge infrastructure, vehicle-mounted air-coupled ground penetrating radar is widely used due to its high-speed detection and no need to close traffic. This measurement method usually fixes the ground penetrating radar antenna and auxiliary electronic equipment on the vehicle to realize the road surface data collection when the vehicle is running at high speed. However, due to the bumps of the vehicle and the vibrations between the connecting parts during this process, the ground clearance and pitch attitude of the vehicle-mounted air-coupled ground penetrating radar undergo high-frequency oscillations. According to the principle of electromagnetic wave propagation, for a fixed target, the reflection intensity of the electromagnetic wave received by the radar is negatively correlated with the distance between the radar and the target. Therefore, changes in the ground clearance and pitch attitude will cause high-frequency vibration noise in the electromagnetic wave receiving signal, thereby affecting the measurement accuracy of the ground penetrating radar for road surface information. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention provides a shock absorbing arm for a vehicle-mounted ground penetrating radar, comprising a connecting support, a first shock absorbing assembly, a second shock absorbing assembly and a pan / tilt assembly.

[0005] The first shock absorbing assembly includes a first connecting seat, a second connecting seat, a first buffer, a first hinge rod and a second hinge rod, the first hinge rod and the second hinge rod have the same length, the first hinge rod and the second hinge rod are parallelly hinged on the first connecting seat and the second connecting seat, and the two ends of the first buffer are respectively connected to one end of the first hinge rod hinged to the first connecting seat and one end of the second hinge rod hinged to the second connecting seat. A parallel four-bar linkage is formed, and through the buffering effect of the first buffer, the ground penetrating radar installed in the pan-tilt assembly can be kept at the original height as much as possible under the action of inertia during the bumping of the vehicle.

[0006] The second shock absorbing assembly includes a third connection seat, a fourth connection seat and a second buffer, the third connection seat is fixedly connected to the second connection seat, the fourth connection seat is hinged on the third connection seat, and both ends of the second buffer are respectively hinged on the third connection seat and the fourth connection seat. The second shock absorbing assembly is used to make the vehicle bumpy, and different from the buffering effect of the first shock absorbing assembly in the height direction, the second shock absorbing assembly has a buffering effect in another direction, and tries to keep the original position under the action of inertia during the bumping of the vehicle.

[0007] The connecting support is used to connect the vehicle, the connecting support is fixedly connected to the first connecting seat, and is used to install the shock absorbing arm at the rear of the vehicle. The pan-tilt assembly is used to install the ground penetrating radar, and the pan-tilt assembly is hinged at the lower end of the fourth connecting seat.

[0008] Furthermore, the pan-tilt assembly includes a first pan-tilt module, a second pan-tilt module and two herringbone connection modules, the first pan-tilt module is connected to the fourth connection seat, and the second pan-tilt module is used to install the ground penetrating radar.

[0009] The herringbone connection module includes a first connection part in the middle and second connection parts at both ends. The first pan-tilt module is provided with two parallel first connecting rods. The first connection parts of the two herringbone connection modules are slidably connected to a first connecting rod respectively. The first connecting rod is provided with a third buffer part on both sides of the corresponding first connection part, which is used to reduce the vibration of the ground penetrating radar along the direction of the first connecting rod.

[0010] There are also two parallel second connecting rods, which are respectively connected to the second connecting parts corresponding to the two herringbone connecting modules. The second gimbal module is slidably arranged on the two second connecting rods. The second connecting rods are respectively provided with third buffer parts on both sides corresponding to the second gimbal module, which are used to reduce the vibration of the ground penetrating radar along the vehicle in the direction of the second connecting rod.

[0011] Furthermore, the line connecting the hinged positions of the first hinged rod and the second hinged rod on the first connecting seat is along the direction of gravity, and the damping direction is the direction of gravity, so that the damping arm can operate reliably.

[0012] Furthermore, the buffering direction of the second buffer is always perpendicular to the axis direction of the hinged rotation of the first hinged rod, thereby enhancing the shock absorption effect.

[0013] Furthermore, the first buffer, the first hinge rod and the second hinge rod are respectively provided with two groups, which are symmetrically arranged on the first connecting seat and the second connecting seat. A reinforcing rod is also included, which is respectively connected between the two groups of first hinge rods and the two groups of second hinge rods to strengthen the shock absorbing effect of the first shock absorbing assembly.

[0014] Furthermore, the first buffer member is a spring.

[0015] Furthermore, it also includes a mounting frame, which is fixed on the third connecting seat, and two ends of the second buffer member are respectively hinged on the mounting frame and the fourth connecting seat.

[0016] Furthermore, the second buffer member is a hydraulic spring or a gas spring.

[0017] Furthermore, it also includes a motor, and the first hinged rod or the second hinged rod is provided with a rotating shaft at the hinged position of the first connecting seat, and the motor transmission is connected to the rotating shaft of the first hinged rod or the second hinged rod to actively reduce the vibration at the first shock absorbing assembly.

[0018] The present invention also provides a vehicle provided with the shock absorbing arm as described above.

[0019] The present invention can better adapt to different terrains and detection requirements, reduce vibration noise, and effectively reduce interference, thereby improving the accuracy and reliability of data collection. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of a shock absorbing arm of the present invention; Figure 2 is a schematic diagram of the pan / tilt assembly of the present invention; In the figure: 1. connecting support; 2. first shock-absorbing assembly; 3. second shock-absorbing assembly; 4. pan-tilt assembly; 5. first connecting seat; 6. second connecting seat; 7. first buffer member; 8. first hinged rod; 9. second hinged rod; 10. third connecting seat; 11. fourth connecting seat; 12. second buffer member; 13. mounting frame; 14. first pan-tilt module; 15. second pan-tilt module; 16. herringbone connecting module; 17. first connecting part; 18. second connecting part; 19. third buffer member; 20. reinforcing rod. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1:

[0024] See also Figure 1 The shock absorbing arm of this embodiment includes a connecting support 1, a first shock absorbing component 2, a second shock absorbing component 3 and a pan / tilt head component 4.

[0025] The first shock absorbing assembly 2 includes a first connecting seat 5, a second connecting seat 6, a first buffer 7, a first hinge rod 8 and a second hinge rod 9. The first hinge rod 8 and the second hinge rod 9 have the same length. The first hinge rod 8 and the second hinge rod 9 are parallelly hinged on the first connecting seat 5 and the second connecting seat 6. The two ends of the first buffer 7 are respectively connected to one end of the first hinge rod 8 hinged to the first connecting seat 5 and one end of the second hinge rod 9 hinged to the second connecting seat 6. A parallel four-bar linkage is formed, and through the buffering effect of the first buffer 7, the ground penetrating radar installed in the pan-tilt assembly 4 can be kept at the original height as much as possible under the action of inertia during the bumping of the vehicle. The first buffer 7 can be selected from hydraulic springs, gas springs or other metal springs with the same function, which can be used for buffering during stretching and extrusion. Preferably, the connecting line of the hinged position of the first hinge rod 8 and the second hinge rod 9 on the first connecting seat 5 is along the gravity direction, and the shock absorption direction is the gravity direction, so that the shock absorbing arm can operate reliably.

[0026] The second shock absorbing assembly 3 includes a third connecting seat 10, a fourth connecting seat 11 and a second buffer 12, wherein the third connecting seat 10 is fixedly connected to the second connecting seat 6, the fourth connecting seat 11 is hinged on the third connecting seat 10, and the two ends of the second buffer 12 are respectively hinged on the third connecting seat 10 and the fourth connecting seat 11. The second shock absorbing assembly 3 is used to make the vehicle bumpy, and in another direction, it is different from the buffering effect of the first shock absorbing assembly 2 in the height direction, and tries to keep the original position under the action of inertia during the bumping of the vehicle. Preferably, it also includes a mounting frame 13, the mounting frame 13 is fixed on the third connecting seat 10, and the two ends of the second buffer 12 are respectively hinged on the mounting frame 13 and the fourth connecting seat 11. The second buffer 12 is preferably a hydraulic spring or a gas spring. The buffering direction of the second buffer 12 is always perpendicular to the axis direction of the hinged rotation of the first hinged rod 8, so as to enhance the shock absorption effect.

[0027] The connecting support 1 is used to connect the vehicle, and the connecting support 1 is fixedly connected to the first connecting seat 5, and is used to install the shock absorbing arm at the rear of the vehicle. The pan-tilt assembly 4 is used to install the ground penetrating radar, and the pan-tilt assembly 4 is hinged at the lower end of the fourth connecting seat 11.

[0028] See also Figure 2 The pan-tilt assembly 4 of this embodiment includes a first pan-tilt module 14, a second pan-tilt module 15 and two herringbone connection modules 16. The first pan-tilt module 14 is connected to the fourth connection socket 11, and the second pan-tilt module 15 is used to install a ground penetrating radar.

[0029] The herringbone connection module 16 includes a first connection part 17 in the middle and second connection parts 18 at both ends. The first pan-tilt module 14 is provided with two parallel first connection rods. The first connection parts 17 of the two herringbone connection modules 16 are respectively slidably connected to a first connection rod. The first connection rods are respectively provided with third buffer parts 19 on both sides of the corresponding first connection parts 17, which are used to reduce the vibration of the ground penetrating radar along the direction of the first connection rod.

[0030] There are also two second connecting rods arranged in parallel, which are respectively connected to the second connecting parts 18 corresponding to the two herringbone connecting modules 16, and the second pan-tilt module 15 is slidably arranged on the two second connecting rods. The second connecting rods are respectively provided with third buffers 19 on both sides corresponding to the second pan-tilt module 15, which are used to reduce the vibration of the ground penetrating radar along the direction of the second connecting rod. Of course, the pan-tilt assembly 4 can use a commercially available pan-tilt that can play the effect of reducing vibration.

[0031] In this embodiment, the first buffer member 7, the first hinge rod 8 and the second hinge rod 9 are respectively provided with two groups, which are symmetrically arranged on the first connecting seat 5 and the second connecting seat 6. A reinforcing rod 20 is also included, which is respectively connected between the two groups of first hinge rods 8 and the two groups of second hinge rods 9 to strengthen the shock absorbing effect of the first shock absorbing assembly 2.

[0032] Preferably, this embodiment also includes a motor, and the first hinged rod 8 or the second hinged rod 9 is provided with a rotating shaft at the hinged position of the first connecting seat 5. The motor transmission is connected to the rotating shaft of the first hinged rod 8 or the second hinged rod 9, and the vibration at the first shock absorbing assembly 2 is actively reduced by monitoring the height of the ground penetrating radar from the ground.

[0033] Embodiment 2:

[0034] The present invention also provides a vehicle, which is provided with the shock absorbing arm in the above embodiment.

[0035] A power supply and a ground-penetrating radar controller are provided inside the vehicle. The ground-penetrating radar controller is used to process and store ground-penetrating radar signals, and the power supply is used to provide power to the ground-penetrating radar controller and the ground-penetrating radar.

[0036] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A shock absorbing arm for a vehicle-mounted ground penetrating radar, characterized in that: It includes a connecting support, a first shock-absorbing assembly, a second shock-absorbing assembly and a pan-tilt assembly; the first shock-absorbing assembly includes a first connecting seat, a second connecting seat, a first buffer, a first hinged rod and a second hinged rod, the first hinged rod and the second hinged rod are of the same length, the first hinged rod and the second hinged rod are hinged in parallel on the first connecting seat and the second connecting seat, and two ends of the first buffer are respectively connected to one end of the first hinged rod hinged to the first connecting seat and one end of the second hinged rod hinged to the second connecting seat; the connecting support is used to connect the vehicle, and the connecting support is fixedly connected to the first connecting seat; the second shock-absorbing assembly includes a third connecting seat, a fourth connecting seat and a second buffer, the third connecting seat is fixedly connected to the second connecting seat, the fourth connecting seat is hinged to the third connecting seat, and two ends of the second buffer are respectively hinged to the third connecting seat and the fourth connecting seat; the pan-tilt assembly is used to install a ground penetrating radar, and the pan-tilt assembly is hinged at the lower end of the fourth connecting seat.

2. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 1, characterized in that: The pan-tilt assembly includes a first pan-tilt module, a second pan-tilt module and two herringbone connecting modules. The first pan-tilt module is connected to the fourth connecting seat, and the second pan-tilt module is used to install the ground penetrating radar; the herringbone connecting module includes a first connecting part in the middle and second connecting parts at both ends. The first pan-tilt module is provided with two parallel first connecting rods. The first connecting parts of the two herringbone connecting modules are respectively slidably connected to a first connecting rod, and the first connecting rods are respectively provided with third buffers on both sides of the corresponding first connecting parts. Two parallel second connecting rods are also provided, which are respectively connected to the second connecting parts corresponding to the two herringbone connecting modules. The second pan-tilt module is slidably arranged on the two second connecting rods, and the second connecting rods are respectively provided with third buffers on both sides of the corresponding second pan-tilt module.

3. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 1, characterized in that: A line connecting the hinged positions of the first hinge rod and the second hinge rod on the first connecting seat is along the direction of gravity.

4. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 3, characterized in that: The buffering direction of the second buffer member is always perpendicular to the axis direction of the hinged rotation of the first hinge rod.

5. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 4, characterized in that: The first buffer, the first hinge rod and the second hinge rod are respectively provided with two groups, which are symmetrically arranged on the first connecting seat and the second connecting seat; and also include reinforcing rods respectively connected between the two groups of first hinge rods and the two groups of second hinge rods.

6. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 5, characterized in that: The first buffer is a spring.

7. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 1, characterized in that: It also includes a mounting frame, which is fixed on the third connecting seat, and two ends of the second buffer are respectively hinged on the mounting frame and the fourth connecting seat.

8. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 7, characterized in that: The second buffer is a hydraulic spring or a gas spring.

9. The shock absorbing arm for vehicle-mounted ground penetrating radar according to claim 1, characterized in that: It also includes a motor. The first hinged rod or the second hinged rod is provided with a rotating shaft at the hinged position of the first connecting seat. The motor is connected to the rotating shaft of the first hinged rod or the second hinged rod through transmission.

10. A vehicle, characterized in that: It is provided with a shock absorbing arm as described in any one of claims 1-9.

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