A highway subgrade pavement deflection detection device

Abstract

The utility model discloses a highway roadbed pavement deflection detection equipment, it includes loading module, sensing collection module, data processing unit, position adjusting module, environmental correction module, storage module, display module and auxiliary support module. Loading module is evenly dispersed loading force through loading plate and elastic element, sensing collection module adopts strain gauge group and vibration sensor group and detects static deformation variable and dynamic response signal respectively, position adjusting module adjusts loading position and angle flexibly, environmental correction module compensates environmental influence in real time through temperature and humidity sensor, display module shows the detection result directly, and auxiliary support module enhances equipment stability. The present application can detect pavement deflection performance comprehensively and accurately, adapts to various road condition demands, improves detection efficiency and reliability.

Description

Technical Field

[0001] This utility model relates to the field of road engineering testing technology, and in particular to a highway subgrade and pavement deflection testing device. Background Technology

[0002] To improve the load-bearing capacity and service life of highway subgrades and pavements, and to ensure road safety and comfort, it is necessary to test the deflection performance of subgrades and pavements. Deflection testing is an important means of assessing the strength and stability of road structures; however, traditional testing methods usually rely on manual operation or simple mechanical equipment, resulting in low testing efficiency and difficulty in guaranteeing data accuracy. Furthermore, existing equipment may be affected by environmental conditions and operational complexity in practical use, leading to incomplete or biased test results, which in turn affects subsequent road maintenance and repair work. Therefore, we propose a highway subgrade and pavement deflection testing device to improve testing efficiency and data accuracy. Utility Model Content

[0003] The purpose of this utility model is to provide a highway subgrade and pavement deflection detection device, which solves the problems mentioned in the background art.

[0004] This invention is implemented as follows: a highway subgrade and pavement deflection detection device includes a loading module, a sensor acquisition module, a data processing unit, a position adjustment module, an environmental correction module, a storage module, a display module, and an auxiliary support module. The loading module is mechanically connected to the sensor acquisition module. The sensor acquisition module transmits the acquired signals to the data processing unit for analysis and processing. The data processing unit stores the processed signals in the storage module and transmits the results to the display module for display. The position adjustment module is fixedly connected to the loading module via a threaded connection and is used to adjust the position of the loading module. The environmental correction module is connected to the data processing unit via a signal line and is used to compensate for environmental factors in the acquired data.

[0005] Furthermore, a highway subgrade and pavement deflection detection device also includes a simulated loading unit. The simulated loading unit is connected to the loading module through a pressure sensor. Under the action of the simulated loading unit, the loading module applies a preset load to the pavement. The pressure sensor transmits the load signal to the data processing unit for processing.

[0006] Furthermore, the position adjustment module includes a horizontal movement submodule, a vertical lifting submodule, and an angle adjustment submodule. The horizontal movement submodule is connected to the main frame of the equipment via a slide rail. The vertical lifting submodule is connected to the horizontal movement submodule via a hydraulic cylinder. The angle adjustment submodule is connected to the vertical lifting submodule via a rotating shaft. The horizontal movement submodule, vertical lifting submodule, and angle adjustment submodule are each connected to a data processing unit via signal lines for real-time position information feedback.

[0007] Furthermore, the sensing and acquisition module includes a strain gauge group and a vibration sensor group. The strain gauge group is fixed to the bottom of the loading module by adhesive bonding and is used to detect the deformation of the road surface. The vibration sensor group is fixed to the side wall of the loading module by bolts and is used to detect the dynamic response signal of the road surface. The strain gauge group and the vibration sensor group are respectively connected to the data processing unit through signal lines for transmitting the acquired signals.

[0008] Furthermore, the data processing unit processes signals from the loading module, the sensor acquisition module, the position adjustment module, and the environmental correction module in a preset order. The data processing unit has built-in signal filtering algorithm and data fusion algorithm for denoising and comprehensive analysis of the acquired signals.

[0009] Furthermore, the loading module includes a loading plate and a loading driver. The loading plate is fixedly connected to the loading driver by bolts, and the loading driver is connected to the data processing unit via wires for receiving control commands and executing loading actions. The bottom of the loading plate has multiple evenly distributed contact points, each connected to the loading plate by an elastic element to distribute the loading force and improve detection accuracy.

[0010] Furthermore, the environmental correction module includes a temperature sensor and a humidity sensor, which are connected to the data processing unit via signal lines to monitor changes in temperature and humidity in the detection environment in real time and transmit the monitoring data to the data processing unit for compensation calculation.

[0011] Furthermore, the display module includes an LCD screen and an indicator light group. The LCD screen is connected to the data processing unit via signal lines and is used to display detection results and equipment operating status. The indicator light group is connected to the data processing unit via a circuit board and is used to indicate the equipment's working mode and abnormal status.

[0012] Furthermore, the auxiliary support module includes retractable legs and anti-slip pads. The retractable legs are connected to the main frame of the equipment via threads to adjust the height of the equipment. The anti-slip pads are fixed to the bottom of the retractable legs by adhesive bonding to enhance the stability of the equipment.

[0013] Compared with existing technologies, the beneficial effects of this utility model are as follows: This utility model provides a highway subgrade and pavement deflection testing device. Through the synergistic effect of a loading module, a sensing acquisition module, a position adjustment module, and an environmental correction module, it achieves comprehensive testing of pavement deflection performance. The loading module, through the design of the loading plate and elastic elements, can evenly distribute the loading force, avoiding testing errors caused by local stress concentration. The strain gauge group and vibration sensor group in the sensing acquisition module respectively detect static deformation and dynamic response signals, improving the diversity and accuracy of the test data. The horizontal movement submodule, vertical lifting submodule, and angle adjustment submodule in the position adjustment module can flexibly adjust the loading position and angle to adapt to the testing needs of different road conditions. The environmental correction module uses temperature and humidity sensors to monitor and compensate for the testing environment in real time, reducing the impact of environmental factors on the test results. Furthermore, the LCD screen and indicator light group in the display module can intuitively display the test results and equipment status, facilitating operators to keep track of the testing progress. The retractable outriggers and anti-slip pads in the auxiliary support module enhance the stability and adaptability of the equipment, ensuring the safety and reliability of the testing process. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 This is a partial enlarged view of the position adjustment module of this utility model.

[0016] The attached diagram is labeled as follows: 1. Loading module; 2. Sensor acquisition module; 3. Position adjustment module; 4. Environmental correction module; 5. Display module; 6. Auxiliary support module; 7. Horizontal movement sub-module; 8. Vertical lifting sub-module; 9. Angle adjustment sub-module; 12. Telescopic outrigger; 13. Anti-slip mat. Detailed Implementation

[0017] This utility model provides a highway subgrade and pavement deflection testing device, the specific implementation of which is described in conjunction with the appendix. Figure 1 and attached Figure 2 Detailed explanation follows. (Attached) Figure 1 This is a schematic diagram of the overall structure of this utility model, showing the layout and connection relationship of the loading module 1, sensing and acquisition module 2, position adjustment module 3, environmental correction module 4, display module 5, and auxiliary support module 6. Figure 2 This is a partially enlarged view of the position adjustment module 3, showing in detail the structure and connection method of the horizontal movement submodule 7, the vertical lifting submodule 8, and the angle adjustment submodule 9. The specific implementation methods of each module are described in detail below with reference to the accompanying drawings.

[0018] The main frame of the equipment is the foundation of the entire device. Loading module 1 is connected to the main frame via position adjustment module 3. Loading module 1 includes a loading plate and a loading driver. The loading plate is fixedly connected to the loading driver with bolts, and the loading driver is connected to the data processing unit via wires to receive control commands and execute loading actions. The bottom of the loading plate has multiple evenly distributed contact points, each connected to the loading plate via an elastic element made of spring steel, which disperses the loading force to avoid localized stress concentration. A simulated loading unit is installed on the side wall of loading module 1. The simulated loading unit is connected to loading module 1 via a pressure sensor, which transmits the load signal to the data processing unit for processing.

[0019] The position adjustment module 3 is fixedly connected to the loading module 1 via a threaded connection and is used to adjust the position of the loading module 1. The position adjustment module 3 includes a horizontal movement submodule 7, a vertical lifting submodule 8, and an angle adjustment submodule 9. The horizontal movement submodule 7 is connected to the main frame of the equipment via a linear guide rail to ensure smooth and precise horizontal movement. The vertical lifting submodule 8 is connected to the horizontal movement submodule 7 via a hydraulic cylinder. The hydraulic cylinder has a built-in piston rod, and the extension and retraction of the piston rod drives the vertical lifting submodule 8 to move up and down. The angle adjustment submodule 9 is connected to the vertical lifting submodule 8 via a rotating shaft. One end of the rotating shaft has a worm gear mechanism, allowing for angle adjustment via manual or electric drive. The horizontal movement submodule 7, vertical lifting submodule 8, and angle adjustment submodule 9 are each connected to the data processing unit via signal lines for real-time position information feedback.

[0020] The sensor acquisition module 2 is installed on the bottom and side walls of the loading module 1 to detect the deformation and dynamic response signals of the road surface. The sensor acquisition module 2 includes a strain gauge group and a vibration sensor group. The strain gauge group is fixed to the bottom of the loading module 1 by adhesive bonding; the number of strain gauges depends on the size of the loading plate, typically 4 to 8, and they are evenly distributed along the bottom edge of the loading plate. The vibration sensor group is fixed to the side walls of the loading module 1 by bolts; the number of vibration sensors is 2 to 4, and they are installed near the center of the loading plate. Both the strain gauge group and the vibration sensor group are connected to the data processing unit via signal lines to transmit the acquired signals.

[0021] The environmental correction module 4 is connected to the data processing unit via signal lines and is used to compensate for environmental factors in the collected data. The environmental correction module 4 includes a temperature sensor and a humidity sensor, which are connected to the data processing unit via signal lines. The temperature sensor is installed on the outer surface of the main frame of the equipment, and the humidity sensor is installed at the bottom of the main frame of the equipment near the ground. These sensors are used to monitor changes in the temperature and humidity of the environment in real time and transmit the monitored data to the data processing unit for compensation calculations.

[0022] The data processing unit processes signals from the loading module 1, sensor acquisition module 2, position adjustment module 3, and environmental correction module 4 sequentially according to a preset order. The unit incorporates signal filtering and data fusion algorithms for denoising and comprehensive analysis of the acquired signals. The signal filtering algorithm, based on wavelet transform, effectively removes high-frequency noise while retaining effective low-frequency signals. The data fusion algorithm integrates multi-source signals using a weighted average method to ultimately generate a unified detection result.

[0023] Display module 5, located on the upper part of the device, includes an LCD screen and an indicator light group. The LCD screen is connected to the data processing unit via signal lines and is used to display test results and device operating status. The LCD screen uses a high-resolution touchscreen, supporting multi-touch operation for convenient viewing and adjustment of parameters. The indicator light group is connected to the data processing unit via a circuit board and includes red, green, and yellow LEDs to indicate the device's operating mode and abnormal status. A red LED indicates a device malfunction, a green LED indicates normal operation, and a yellow LED indicates standby mode.

[0024] The auxiliary support module 6 is located at the bottom of the equipment and includes retractable support legs 12 and anti-slip pads 13. The retractable support legs 12 are connected to the main frame of the equipment via threads. There are four retractable support legs 12, evenly distributed at the four corners of the main frame, used to adjust the height of the equipment. The anti-slip pads 13 are fixed to the bottom of the retractable support legs 12 by adhesive bonding. The anti-slip pads 13 are made of rubber and have good friction properties to enhance the stability of the equipment.

[0025] In actual use, the operator first adjusts the height of the equipment using the extendable outriggers 12 to ensure the loading plate is parallel to the road surface being tested. Then, the horizontal movement submodule 7 and the vertical lifting submodule 8 are activated to move the loading module 1 to the designated position. The angle adjustment submodule 9 is used to fine-tune the angle of the loading plate, ensuring it is fully in contact with the road surface. The loading driver is then activated, and the loading plate, under the action of the elastic element, applies a uniformly distributed preset load to the road surface. The pressure sensor transmits the load signal to the data processing unit. Simultaneously, the strain gauge group and vibration sensor group collect the static deformation and dynamic response signals of the road surface, respectively, and transmit these signals to the data processing unit for processing. The data processing unit filters and fuses the received signals, and performs compensation calculations based on the temperature and humidity data provided by the environmental correction module 4, ultimately generating the test results. The test results are displayed in real time on the LCD screen, and indicator lights synchronously indicate the equipment's operating status. Throughout the testing process, the anti-slip pad 13 ensures the stability of the equipment, preventing tilting or sliding due to uneven ground.

[0026] As can be seen from the above embodiments, the various modules of this utility model achieve close cooperation through mechanical connections and signal line connections, ensuring the efficiency and accuracy of the detection process. The loading module 1 achieves uniform distribution of loading force through the design of elastic elements, avoiding localized stress concentration. The strain gauge group and vibration sensor group in the sensing and acquisition module 2 respectively detect static deformation and dynamic response signals, improving the diversity and accuracy of the detection data. The horizontal movement submodule 7, vertical lifting submodule 8, and angle adjustment submodule 9 in the position adjustment module 3 can flexibly adjust the loading position and angle to adapt to the detection needs of different road conditions. The environmental correction module 4 uses temperature and humidity sensors to monitor and compensate for the detection environment in real time, reducing the impact of environmental factors on the detection results. The LCD screen and indicator light group in the display module 5 can intuitively display the detection results and equipment status, facilitating operators to keep track of the detection progress. The retractable outriggers 12 and anti-slip pads 13 in the auxiliary support module 6 enhance the stability and adaptability of the equipment, ensuring the safety and reliability of the detection process.

[0027] To enable those skilled in the art to fully understand and implement this utility model, the following supplementary explanation of the specific implementation principle of this utility model is provided in conjunction with a specific application scenario.

[0028] In actual operation, the overall height of the equipment is first adjusted by adjusting the retractable outriggers 12 in the auxiliary support module 6. Specifically, the operator rotates the threaded portion of the retractable outriggers 12, moving them vertically along the four corners of the main frame of the equipment until the loading plate is parallel to the road surface being tested. This step is crucial to ensure that the loading force is evenly distributed on the road surface, preventing the loading force from deviating from the preset range due to equipment tilting. Simultaneously, the anti-slip mat 13, with its high-friction rubber material, enhances the stability between the bottom of the equipment and the ground, preventing the equipment from sliding or tilting during testing, thus ensuring the reliability of the test data.

[0029] Subsequently, the horizontal movement submodule 7 and vertical lifting submodule 8 in the position adjustment module 3 are activated to move the loading module 1 to the designated detection position. The horizontal movement submodule 7 is connected to the main frame of the equipment via a slide rail, which is a linear guide rail to ensure smooth and precise horizontal movement of the loading module 1. The vertical lifting submodule 8 moves the loading module 1 up and down through the extension and retraction of the piston rod in the hydraulic cylinder. During this process, the angle adjustment submodule 9 is connected to the vertical lifting submodule 8 via a rotating shaft and uses a worm gear mechanism to fine-tune the angle of the loading plate, ensuring it is fully in contact with the road surface. The core of the above steps lies in adapting to the detection needs of different road conditions through multi-dimensional position adjustment functions, ensuring that the loading force can be accurately applied to the target area.

[0030] After position adjustment is completed, the loading driver in loading module 1 is activated. Under the action of the elastic element, the loading plate applies a uniformly distributed preset load to the road surface. The elastic element is made of spring steel, designed to disperse the loading force, avoid unnecessary damage to the road surface caused by localized stress concentration, and improve detection accuracy. During loading, the pressure sensor monitors the magnitude of the loading force in real time and transmits the load signal to the data processing unit for recording and analysis. The key to this process is ensuring that the loading force meets the preset value through precise control of the simulated loading unit, thus providing a reliable basis for subsequent data analysis.

[0031] Simultaneously with the application of the loading force, sensor acquisition module 2 begins operation. The strain gauge assembly is adhesively fixed to the bottom of the loading plate to detect the static deformation of the road surface under the loading force; the vibration sensor assembly is bolted to the side wall of the loading plate to capture the dynamic response signals of the road surface. Both the strain gauge and vibration sensor assemblies transmit the acquired signals to the data processing unit for comprehensive analysis. The technical significance of this step lies in comprehensively reflecting the mechanical properties of the road surface under loading conditions through the acquisition of multi-source signals, thereby providing diverse data support for deflection performance assessment.

[0032] Meanwhile, the temperature and humidity sensors in the environmental correction module 4 monitor changes in the ambient temperature and humidity in real time and transmit the monitoring data to the data processing unit. The signal filtering algorithm built into the data processing unit, based on wavelet transform principles, denoises the acquired signals, retaining only the effective low-frequency signals. The data fusion algorithm integrates multi-source signals using a weighted average method, ultimately generating a unified detection result. The key to this process is reducing the impact of external conditions on the detection results through real-time compensation for environmental factors, thereby improving the accuracy of the detection data.

[0033] The test results are displayed in real time on the LCD screen in display module 5. Operators can view detailed test data and equipment operating status via the touchscreen. The indicator lights use red, green, and yellow LEDs to visually indicate the equipment's operating mode and abnormal status. For example, a green LED is lit when the equipment is in normal operation; a red LED flashes when the equipment malfunctions; and a yellow LED remains lit when the equipment is in standby mode. The significance of this design is that it allows operators to easily monitor the testing progress and equipment status through an intuitive visual interface.

[0034] Throughout the testing process, the anti-slip pad 13 in the auxiliary support module 6 plays a crucial role. The anti-slip pad 13, with its high-friction rubber material, ensures the equipment remains stable under various terrain conditions, preventing tilting or sliding due to uneven ground. Furthermore, the height-adjustable telescopic legs 12 further enhance the equipment's adaptability, enabling it to meet testing needs at different heights.

[0035] In summary, this invention achieves efficient and accurate detection of the deflection performance of highway subgrade and pavement through the coordinated operation of the loading module 1, sensing and acquisition module 2, position adjustment module 3, environmental correction module 4, display module 5, and auxiliary support module 6. The mechanical and signal line connections between the modules ensure the efficiency and accuracy of the detection process, while the design of the elastic element, the acquisition and fusion of multi-source signals, and the real-time compensation for environmental factors further improve the diversity and reliability of the detection data.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A highway subgrade and pavement deflection testing device, characterized in that, It includes a loading module (1), a sensor acquisition module (2), a data processing unit, a position adjustment module (3), an environmental correction module (4), a storage module, a display module (5), and an auxiliary support module (6); The loading module (1) is connected to the sensing acquisition module (2) by mechanical connection. The sensing acquisition module (2) transmits the acquired signal to the data processing unit for analysis and processing. The data processing unit stores the processed signal in the storage module and transmits the result to the display module (5) for display. The position adjustment module (3) is fixedly connected to the loading module (1) by a threaded connection and is used to adjust the position of the loading module (1); The environmental correction module (4) is connected to the data processing unit via a signal line and is used to compensate for environmental factors in the collected data.

2. The highway subgrade and pavement deflection testing equipment according to claim 1, characterized in that: It also includes a simulated loading unit, which is connected to the loading module (1) via a pressure sensor. The loading module (1) applies a preset load to the road surface under the action of the simulated loading unit, and the pressure sensor transmits the load signal to the data processing unit for processing.

3. The highway subgrade and pavement deflection testing equipment according to claim 1, characterized in that: The position adjustment module (3) includes a horizontal movement submodule (7), a vertical lifting submodule (8), and an angle adjustment submodule (9). The horizontal movement submodule (7) is connected to the main frame of the equipment via a slide rail. The vertical lifting submodule (8) is connected to the horizontal movement submodule (7) via a hydraulic cylinder. The angle adjustment submodule (9) is connected to the vertical lifting submodule (8) via a rotating shaft. The horizontal movement submodule (7), the vertical lifting submodule (8), and the angle adjustment submodule (9) are respectively connected to the data processing unit via signal lines.

4. The highway subgrade and pavement deflection testing equipment according to claim 1, characterized in that: The sensing acquisition module (2) includes a strain gauge group and a vibration sensor group. The strain gauge group is fixed to the bottom of the loading module (1) by adhesive bonding, and the vibration sensor group is fixed to the side wall of the loading module (1) by bolts. The strain gauge group and the vibration sensor group are respectively connected to the data processing unit through signal lines.

5. The highway subgrade and pavement deflection testing equipment according to claim 1, characterized in that: The loading module (1) includes a loading plate and a loading driver. The loading plate is fixedly connected to the loading driver by bolts, and the loading driver is connected to the data processing unit by wires. The bottom of the loading plate is provided with multiple evenly distributed contact points, and each contact point is connected to the loading plate by an elastic element.

6. The highway subgrade and pavement deflection testing equipment according to claim 1, characterized in that: The environmental correction module (4) includes a temperature sensor and a humidity sensor, which are connected to the data processing unit via signal lines.

7. The highway subgrade and pavement deflection testing equipment according to claim 1, characterized in that: The auxiliary support module (6) includes a telescopic support leg (12) and an anti-slip pad (13). The telescopic support leg (12) is connected to the main frame of the equipment by threads, and the anti-slip pad (13) is fixed to the bottom of the telescopic support leg (12) by adhesive bonding.

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