Asphalt concrete pavement roadbed cavity nondestructive testing instrument

Abstract

The utility model discloses an asphalt concrete pavement roadbed cavity nondestructive testing instrument, which belongs to the field of road detection equipment and comprises a movable base, a scanning mechanism, a positioning system and a controller mounted on the movable base. An output shaft of the first motor is coaxially connected with a rotating shaft, a plurality of driving wheels are installed on the rotating shaft, and a plurality of driven wheels are further arranged at the front position of the bottom of the movable base. The scanning mechanism comprises a transverse sliding rail installed at the bottom of the movable base, a sliding block connected into the transverse sliding rail in a sliding mode, a transverse driving assembly installed on the transverse sliding rail and used for driving the sliding block to slide, and a detection sensor installed on the sliding block. The positioning system is installed on the sliding block, the positioning system and the detection sensor are distributed in a staggered mode, and the positioning system is used for obtaining device position information.

Description

Technical Field

[0001] This utility model relates to the field of road testing equipment technology, specifically to a non-destructive testing instrument for voids in asphalt concrete pavement subgrade. Background Technology

[0002] With the rapid development of transportation infrastructure construction in my country, asphalt concrete pavement has been widely used due to its excellent comfort and skid resistance. However, affected by factors such as geological conditions, construction quality, and vehicle load, asphalt concrete pavement subgrades are prone to voids. Subgrade voids reduce the pavement's load-bearing capacity, leading to pavement settlement, cracking, and other defects, and in severe cases, even threatening traffic safety.

[0003] Traditional methods for detecting roadbed voids, such as manual excavation, are not only inefficient and labor-intensive, but also damage the road surface, affecting normal traffic flow. Some existing non-destructive testing (NDT) equipment suffers from limited coverage, low accuracy, and inaccurate positioning, making it difficult to meet the demands of rapid and accurate detection of voids in asphalt concrete pavement roadbeds in practical engineering projects. Therefore, there is an urgent need for an instrument capable of efficiently and accurately performing non-destructive testing on voids in asphalt concrete pavement roadbeds. Summary of the Invention

[0004] The purpose of this invention is to address the problems of low detection efficiency, low accuracy, and inaccurate positioning in existing technologies by providing a non-destructive testing instrument for voids in asphalt concrete pavement subgrade.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a non-destructive testing instrument for voids in asphalt concrete pavement subgrade, comprising a movable base, a scanning mechanism, a positioning system, and a controller installed on the movable base.

[0006] A first motor is located at the rear of the bottom of the mobile base. The output shaft of the first motor is coaxially connected to a rotating shaft, on which multiple drive wheels are mounted. Multiple driven wheels are also located at the front of the bottom of the mobile base. The first motor drives the drive wheels to rotate, moving the entire testing instrument on the road surface. The driven wheels provide support and assist in movement, making the instrument's movement more stable.

[0007] The scanning mechanism includes a transverse slide rail mounted on the bottom of the movable base, a slider slidably connected within the transverse slide rail, a transverse drive assembly mounted on the transverse slide rail for driving the slider to slide, and a detection sensor mounted on the slider. The transverse drive assembly can drive the slider to slide on the transverse slide rail, thereby causing the detection sensor to move in the transverse direction, realizing the detection of different positions on the road surface and expanding the detection range.

[0008] The positioning system is mounted on the slider and offset from the detection sensor. The positioning system acquires the device's position information and is connected to a controller, which is electrically connected to the first motor and the lateral drive assembly. The positioning system can accurately acquire the position information of the detection instrument on the road surface. Based on the position information acquired by the positioning system, the controller controls the start / stop and travel speed of the first motor, as well as the sliding speed and stroke of the slider driven by the lateral drive assembly, thereby achieving accurate detection and positioning of the detection area.

[0009] Furthermore, a storage battery is installed on the mobile base to power the first motor, the lateral drive assembly, and the controller, ensuring the continuous operation of the testing instrument.

[0010] Furthermore, the lateral drive assembly includes a second motor, a lead screw, and a nut. The output shaft of the second motor is connected to the lead screw, and the nut is fixedly connected to the slider and cooperates with the lead screw. The second motor drives the lead screw to rotate, thereby causing the slider to slide on the lateral slide rail. The battery supplies power to the second motor. This structure is simple, provides stable transmission, and can precisely control the movement of the slider.

[0011] Furthermore, the detection sensor is a ground-penetrating radar sensor, used to transmit and receive electromagnetic waves to detect cavities in the roadbed. Ground-penetrating radar sensors can utilize the propagation characteristics of electromagnetic waves in different media to quickly and accurately detect the location and size of cavities in the roadbed.

[0012] Furthermore, the positioning system is a GPS positioning module or a Beidou positioning module, which can accurately obtain the device's location information on the road surface, ensuring accurate correspondence between the detection data and the actual location.

[0013] Furthermore, the controller is equipped with a microcontroller control circuit. The microcontroller control circuit controls the start and stop of the first motor and its traveling speed according to the position information obtained by the positioning system, as well as controls the sliding speed and stroke of the slider driven by the lateral drive component, so as to realize the automation and precise control of the detection process.

[0014] Furthermore, the transverse slide rail is fixedly installed on the bottom of the movable base by bolts or welding to ensure the sturdiness of the transverse slide rail installation.

[0015] Furthermore, the transverse slide rail is installed on the transverse central axis at the bottom of the movable base, so that the detection sensor can cover the road surface more evenly during transverse detection, thereby improving the comprehensiveness and accuracy of the detection.

[0016] Furthermore, both the drive wheel and the driven wheel are directional wheels, which facilitates the control of the movement direction of the detection instrument, ensuring that the detection instrument maintains linear motion during the detection process and avoiding any deviation that could affect the detection results.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] 1. This non-destructive testing instrument for voids in asphalt concrete pavement subgrade uses a first motor to drive the instrument to move on the road surface, while the lateral drive component drives the detection sensor to scan laterally. This enables rapid testing of large areas of asphalt concrete pavement subgrade, greatly improving testing efficiency.

[0019] 2. This non-destructive testing instrument for asphalt concrete pavement subgrade voids uses a ground-penetrating radar sensor as the detection sensor, which can accurately detect subgrade voids by utilizing the characteristics of electromagnetic waves; at the same time, it accurately acquires location information through a positioning system, and combined with the controller for precise control of the detection process, it ensures the accuracy and reliability of the detection data.

[0020] 3. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade can accurately obtain the instrument's location using a GPS or Beidou positioning module, ensuring that the test results correspond accurately to the actual location and facilitating subsequent repair and treatment of subgrade voids.

[0021] 4. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade has a single-chip microcomputer control circuit in the controller that automatically controls the operation of the first motor and the lateral drive component based on the information obtained by the positioning system, thereby automating the testing process, reducing manual operation, and lowering labor intensity. Attached Figure Description

[0022] Figure 1 This is a front view structural diagram of the present invention.

[0023] Figure 2 This utility model Figure 1 A magnified structural diagram of point A in the middle.

[0024] Figure 3 This is a bottom view of the structure of this utility model.

[0025] Figure 4 This is a schematic diagram of the scanning mechanism and positioning system of this utility model.

[0026] In the diagram: 1. Movable base; 11. First motor; 12. Rotating shaft; 13. Drive wheel; 14. Driven wheel; 15. Mounting bracket; 2. Scanning mechanism; 21. Lateral slide rail; 22. Slider; 23. Lateral drive assembly; 231. Second motor; 232. Lead screw; 24. Detection sensor; 3. Positioning system; 4. Controller; 5. Battery. Detailed Implementation

[0027] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0028] Please refer to Figures 1 to 4 The non-destructive testing instrument for voids in asphalt concrete pavement subgrade in this embodiment includes a movable base 1, a scanning mechanism 2, a positioning system 3, and a controller 4 installed on the movable base 1.

[0029] A first motor 11 is located at the rear of the bottom of the mobile base 1, and the first motor 11 is fixedly mounted on the mobile base 1 via a mounting bracket 15. The output shaft of the first motor 11 is coaxially connected to a rotating shaft 12, and multiple drive wheels 13 are mounted on the rotating shaft 12. Multiple driven wheels 14 are also located at the front of the bottom of the mobile base 1. The first motor 11 drives the drive wheels 13 to rotate, moving the entire testing instrument on the road surface. The driven wheels 14 provide support and assist in the movement, making the instrument's movement more stable.

[0030] Please refer to Figure 1 , Figure 3 and Figure 4 The scanning mechanism 2 includes a transverse slide rail 21 mounted on the bottom of the movable base 1, a slider 22 slidably connected within the transverse slide rail 21, a transverse drive assembly 23 mounted on the transverse slide rail 21 for driving the slider 22 to slide, and a detection sensor 24 mounted on the slider 22. The transverse drive assembly 23 can drive the slider 22 to slide on the transverse slide rail 21, thereby causing the detection sensor 24 to move in the transverse direction, realizing the detection of different positions on the road surface and expanding the detection range.

[0031] Please refer to Figure 1 , Figure 2 and Figure 4The positioning system 3 is mounted on the slider 22 and is offset from the detection sensor 24. The positioning system 3 is used to acquire the device's position information and is connected to the controller 4. The controller 4 is electrically connected to the first motor 11 and the lateral drive assembly 23. The positioning system 3 can accurately acquire the position information of the detection instrument on the road surface. Based on the position information acquired by the positioning system 3, the controller 4 controls the start / stop and travel speed of the first motor 11, and controls the sliding speed and stroke of the slider 22 driven by the lateral drive assembly 23, thereby achieving accurate detection and positioning of the detection area.

[0032] Furthermore, a storage battery 5 is installed on the mobile base 1. The storage battery 5 is used to power the first motor 11, the lateral drive assembly 23 and the controller 4 to ensure the continuous operation of the testing instrument.

[0033] Furthermore, the lateral drive assembly 23 includes a second motor 231, a lead screw 232, and a nut. The output shaft of the second motor 231 is connected to the lead screw 232. The nut is fixedly connected to the slider 22 and cooperates with the lead screw 232. The second motor 231 drives the lead screw 232 to rotate, thereby causing the slider 22 to slide on the lateral slide rail 21. The battery 5 supplies power to the second motor 231. This structure is simple, has stable transmission, and can precisely control the movement of the slider 22.

[0034] Furthermore, the detection sensor 24 is a ground-penetrating radar sensor, used to transmit and receive electromagnetic waves to detect cavities in the roadbed. Ground-penetrating radar sensors can utilize the propagation characteristics of electromagnetic waves in different media to quickly and accurately detect the location and size of cavities in the roadbed.

[0035] Furthermore, the positioning system 3 is a GPS positioning module or a Beidou positioning module, which can accurately obtain the device's location information on the road surface, ensuring accurate correspondence between the detection data and the actual location.

[0036] Furthermore, the controller 4 is equipped with a microcontroller control circuit. The microcontroller control circuit controls the start and stop of the first motor 11 and its traveling speed according to the position information obtained by the positioning system 3, and controls the sliding speed and stroke of the slider 22 driven by the transverse drive component 23, so as to realize the automation and precise control of the detection process.

[0037] Furthermore, the transverse slide rail 21 is fixedly installed on the bottom of the movable base 1 by bolts or welding to ensure the sturdiness of the transverse slide rail 21 installation.

[0038] Furthermore, the transverse slide rail 21 is installed on the transverse central axis at the bottom of the movable base 1, so that the detection sensor 24 can cover the road surface more evenly during transverse detection, thereby improving the comprehensiveness and accuracy of the detection.

[0039] Furthermore, both the drive wheel 13 and the driven wheel 14 are directional wheels, which facilitates the control of the movement direction of the detection instrument, ensuring that the instrument maintains linear motion during the detection process and preventing deviations from affecting the detection results.

[0040] Work style:

[0041] The testing instrument is placed on the asphalt concrete pavement to be tested. The controller 4 is activated. Based on the initial position information obtained from the positioning system 3, the microcontroller control circuit within the controller 4 controls the first motor 11 to start. The first motor 11 drives the rotating shaft 12 and drive wheels 13 to rotate, causing the testing instrument to move forward on the pavement. Simultaneously, the microcontroller control circuit controls the second motor 231 in the lateral drive assembly 23 to start. The second motor 231 drives the lead screw 232 to rotate. The lead screw 232, through a nut, drives the slider 22 to slide on the lateral slide rail 21, thereby causing the detection sensor 24 mounted on the slider 22 to scan in the lateral direction.

[0042] The detection sensor 24 emits electromagnetic waves. When these electromagnetic waves encounter abnormal media such as cavities in the roadbed, they are reflected. The detection sensor 24 receives the reflected electromagnetic waves and converts them into electrical signals, which are then transmitted to the controller 4. The controller 4 analyzes and processes the electrical signals to determine whether cavities exist in the roadbed and to ascertain the location and size of such cavities.

[0043] During the detection process, the positioning system 3 continuously acquires the position information of the detection instrument and transmits it to the controller 4. Based on the position information, the microcontroller control circuit adjusts the traveling speed of the first motor 11 and the sliding speed and stroke of the slider 22 in the lateral drive assembly 23 in real time to ensure the comprehensiveness and accuracy of the detection.

[0044] After a section of road surface is inspected, the microcontroller control circuit stops the first motor 11 and the second motor 231, moves the inspection instrument to the next section of road surface to be inspected, and repeats the above inspection process until the inspection of the entire inspection area is completed.

[0045] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A non-destructive testing instrument for voids in asphalt concrete pavement subgrade, comprising a movable base (1), a scanning mechanism (2), a positioning system (3), and a controller (4) mounted on the movable base (1), characterized in that: The bottom of the mobile base (1) is provided with a first motor (11) at the rear position. The output shaft of the first motor (11) is coaxially connected to a rotating shaft (12). Multiple drive wheels (13) are installed on the rotating shaft (12). Multiple driven wheels (14) are also provided at the bottom of the mobile base (1). The scanning mechanism (2) includes a horizontal slide rail (21) installed at the bottom of the movable base (1), a slider (22) slidably connected in the horizontal slide rail (21), a horizontal drive assembly (23) installed on the horizontal slide rail (21) and used to drive the slider (22) to slide, and a detection sensor (24) installed on the slider (22). The positioning system (3) is installed on the slider (22) and is staggered from the detection sensor (24). The positioning system (3) is used to obtain device position information and is connected to the controller (4). The controller (4) is electrically connected to the first motor (11) and the lateral drive assembly (23) respectively.

2. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, A battery (5) is installed on the mobile base (1), which is used to power the first motor (11), the lateral drive assembly (23) and the controller (4).

3. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, The transverse drive assembly (23) includes a second motor (231), a lead screw (232) and a nut. The output shaft of the second motor (231) is connected to the lead screw (232). The nut is fixedly connected to the slider (22) and cooperates with the lead screw (232). The second motor (231) drives the lead screw (232) to rotate, thereby causing the slider (22) to slide on the transverse slide rail (21).

4. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, The detection sensor (24) is a ground-penetrating radar sensor, used to transmit and receive electromagnetic waves to detect roadbed cavities.

5. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, The positioning system (3) is a GPS positioning module or a Beidou positioning module, which can accurately obtain the device's location information on the road surface.

6. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, The controller (4) is equipped with a microcontroller control circuit. The microcontroller control circuit controls the start and stop of the first motor (11) and its speed of travel based on the position information obtained by the positioning system (3), and controls the sliding speed and stroke of the slider (22) driven by the transverse drive component (23).

7. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, The transverse slide rail (21) is fixedly installed at the bottom of the movable base (1) by bolts or welding.

8. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, The transverse slide rail (21) is installed on the transverse central axis at the bottom of the movable base (1).

9. The non-destructive testing instrument for voids in asphalt concrete pavement subgrade according to claim 1, characterized in that, Both the driving wheel (13) and the driven wheel (14) are directional wheels.

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