Automatic rut depth testing device matched with actual road surface

Abstract

An automatic rut depth testing device matched with an actual road surface relates to the technical field of road administration testing devices and comprises a testing box body, a testing stand for fixing a sample is arranged in the testing box body, a transverse moving assembly is horizontally arranged on the top surface of the inner wall of the testing box body in the transverse direction, and the transverse moving assembly drives a vertical telescopic assembly to move in the transverse direction. A roller assembly is arranged at the telescopic end of the vertical telescopic assembly, the transverse moving assembly drives the roller assembly to roll back and forth along the sample to form a track, and a laser detection assembly used for testing the sunken deformation depth of the track and the protruding deformation height of the two sides of the track is arranged in the middle of the test box body. According to the utility model, the rut depth of the asphalt mixture in an indoor rut test can be comprehensively measured by virtue of the laser displacement sensor and the photoelectric receiver, and the rut condition of a real pavement can be better simulated, so that the rut condition is better close to the actual condition, and the measurement of concave-convex deformation in indoor rut depth detection is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of road administration test devices, and particularly relates to an automatic rut depth test device matching the actual road surface. Background Art

[0002] In recent years, the highway transportation industry in China has developed rapidly and vigorously, promoting China's economic construction and strengthening regional exchanges. In particular, the completion and opening of a large number of highways have made great contributions to social development. The criss-cross highway network has greatly facilitated people's travel. Corresponding to the rapid development of highway construction in China, the traffic volume has also increased sharply, and vehicles have gradually formed a channelized traffic. Coupled with the combined effects of factors such as continuous high temperature, rutting has become a common pavement disease in the early damage of asphalt pavements in China. Rutting not only deforms the road surface and destroys the flatness of the road surface, but also the rut in the shape of a track will seriously endanger the safety of driving, because the accumulated water in the rut groove will cause the vehicle traveling at high speed to hydroplane; at the same time, as the rut deepens, it is difficult to control the steering wheel, increasing the insecurity of driving. Rutting can be divided into narrow rutting and broad rutting. Narrow rutting refers to the strip-shaped groove generated at the position where vehicles concentrate longitudinally on the road, and this definition does not consider the bulges of asphalt mixtures on both sides of the wheel track. Broad rutting refers to the accumulation of plastic deformation of the asphalt mixture under the wheels due to the repeated action of wheels on the driving lane. First, it is compacted, and then it is pushed to both sides of the road surface under the wheels, resulting in permanent downward deformation and at the same time forming upward convex deformation on both sides of the rut.

[0003] Therefore, it is very necessary to evaluate the high-temperature stability of asphalt mixtures through indoor rutting tests and then adjust the mixture ratio. The technical index used in China to evaluate the high-temperature stability of asphalt pavements is the dynamic stability measured by indoor rutting tests. The technical requirements for the dynamic stability of highway asphalt mixtures are specified in the "Test Procedures for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011). China's rutting test is carried out under standard conditions of a temperature of 60°C, a load of 0.7 MPa, and a rate of 42 times / min. By continuously monitoring the development of rutting during the rolling process, the deformations at 45 min and 60 min are obtained, and the dynamic stability DS is calculated according to the specified formula to evaluate the rutting resistance of asphalt mixtures.

[0004] At present, in the indoor rutting test regulations, since the displacement sensor of the equipment only considers the rut depression depth of the rutting plate specimen, while the actual road surface test process considers the edge convex deformation and the depression deformation at the center of the wheel print, the indoor rutting test cannot fully simulate the actual road rutting situation, resulting in inconsistent high-temperature deformation data between the indoor specimens and the actual road surface, and insufficient guidance for the deformation performance of the physical road surface. Content of the Utility Model

[0005] The purpose of the present utility model is to provide an automated rut depth testing device that matches the actual road surface to solve the technical problems pointed out in the background art.

[0006] To solve the above technical problems, the technical solution adopted by the present utility model is as follows:

[0007] An automated rut depth testing device that matches the actual road surface, comprising a testing box body. Inside the testing box body, there is a test bench for fixing the specimen. Horizontally and horizontally arranged on the top surface of the inner wall of the testing box body is a transverse movement component. The transverse movement component drives the vertical telescopic component to move horizontally. The telescopic end of the vertical telescopic component is provided with a roller component. The transverse movement component drives the roller component to roll back and forth along the specimen to form a rut. In the middle of the testing box body, there is a laser detection component for testing the depth of the rut depression deformation and the height of the convex deformation on both sides of the rut.

[0008] Furthermore, the transverse movement component includes a roller guide rail horizontally arranged on the top wall inside the test box body. A guide slider is drivingly connected to the roller guide rail. The roller guide rail drives the guide slider to move along its length direction through a driving member.

[0009] Furthermore, the vertical telescopic component includes a telescopic driver fixed on the guide slider. Vertically downward from the bottom of the telescopic driver is a telescopic cylinder. Inside the telescopic cylinder, there is a telescopic rod that is driven up and down by the telescopic driver. The roller component is arranged at the lower end of the telescopic rod.

[0010] Furthermore, the roller component includes a roller support frame and a roller rotatably arranged inside the roller support frame. The roller support frame is fixedly connected to the lower end of the telescopic rod.

[0011] Furthermore, the laser detection component includes a cross beam plate guide rail horizontally arranged in the middle of the testing box body. A cross beam plate is horizontally slidably arranged on the cross beam plate guide rail. The cross beam plate is driven by a driving member to move left and right in the horizontal direction of the cross beam plate guide rail. At the bottom surface of the cross beam plate, a number of laser displacement sensors are arranged at intervals. The detection direction of the laser displacement sensors faces the direction of the specimen. The laser displacement sensors are connected to a photoelectric receiver through wires. The photoelectric receiver is connected to a data analysis terminal through wires.

[0012] Furthermore, 4 - 8 laser displacement sensors are arranged relative to the rut print position on the cross beam plate, and 2 - 4 laser displacement sensors are arranged relative to the edge position of the rut print.

[0013] Furthermore, a temperature sensor for real - time detection of the temperature inside the test box body is arranged inside the test box body.

[0014] Further, it also includes a control component, and the control component is electrically connected to the driving part, the telescopic driver, and the temperature sensor through wires.

[0015] Further, a test mold for clamping and fixing the specimen is arranged on the test bench.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] Under the action of vehicle loads, deformations of different degrees will occur on the surface and inside of the road surface. With the help of the laser displacement sensor and the photoelectric receiver, this device can comprehensively measure the rut depth of the asphalt mixture in the indoor rut test, better simulate the rut situation of the real road surface, make it closer to the actual situation, and realize the measurement of the concave and convex deformation in the indoor rut depth detection. This device uses multiple laser displacement sensors for multi-point measurement, can obtain very accurate data, and provide a more accurate rut shape. This device adopts the point laser rut detection technology combined with the indoor rut test device, can complete the vehicle detection in a very short time, and can automatically generate the deformation curve and rut shape relying on the data analysis terminal, thus improving the work efficiency. Description of the Drawings

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0019] Figure 1 It is the front view structural schematic diagram of the present utility model;

[0020] Figure 2 It is the top view structural schematic diagram of the present utility model;

[0021] Figure 3 It is the schematic diagram of the test rut print of the present utility model.

[0022] In the figure: The sliding guide 1, the roller guide rail 2, the telescopic driver 3, the telescopic cylinder 4, the telescopic rod 5, the roller support frame 6, the roller 7, etc. constitute the roller device system; the cross beam plate guide rail 8, the test 9, the specimen mold 10, the specimen table 11, the box body 12, the cross beam plate 13, the laser displacement device 14, the control component, the photoelectric receiver 16, the data analysis terminal 17, the temperature sensor 18. Detailed Embodiments

[0023] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0025] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "beneath" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0027] As Figures 1-3 shown, an automatic rut depth testing device matching the actual road surface includes a testing box body 12. A test bench 11 for fixing a specimen 9 is arranged inside the testing box body 12. A transverse movement component is horizontally arranged on the top surface of the inner wall of the testing box body 12. The transverse movement component drives the vertical telescopic component to move horizontally. A roller component is arranged at the telescopic end of the vertical telescopic component. The transverse movement component drives the roller component to roll back and forth along the specimen 9 to form a rut. A laser detection component for testing the depression deformation depth of the rut and the convex deformation height on both sides of the rut is arranged in the middle of the testing box body 12.

[0028] The utility model provides an automatic rut depth testing device that matches the actual road surface. During use, the specimen 9 to be tested is placed on the test bench 11 and fixed to ensure that the specimen will not move or deform during the test. When the test starts, the transverse movement assembly is activated. It is located on the top surface of the inner wall of the test box 12 and is horizontally arranged transversely. The transverse movement assembly is responsible for driving the vertical telescopic assembly to move in the horizontal direction, that is, to move back and forth along the length direction of the specimen. With the drive of the transverse movement assembly, the telescopic end of the vertical telescopic assembly starts to work. The telescopic end of the vertical telescopic assembly is equipped with a roller assembly, which enables the roller assembly to move up and down to adjust its height and at the same time can roll back and forth along the surface of the specimen under the drive of the transverse movement assembly. When the roller assembly rolls back and forth along the surface of the specimen, due to the pressure and friction of the rollers, depressions (ruts) will gradually form on the surface of the specimen and bulging deformations will occur on both sides. During this process, the back-and-forth rolling of the roller assembly simulates the impact of actual vehicle driving on the road surface. The laser detection assembly arranged in the middle of the test box 12 is used to monitor and measure the deformation depth of the rut depression and the deformation height of the bulges on both sides of the rut in real time. The laser detection assembly uses laser ranging technology to accurately measure the minute deformations on the surface of the specimen and transmits the measurement data to the data processing system for analysis. The measured rut depth and the deformation height data of the bulges on both sides will be transmitted to the data processing system for further analysis and processing. These data are of great reference value for evaluating the rut resistance performance of the specimen, material properties, and road surface structure design, etc.

[0029] Specifically, as shown in the figure, the transverse movement assembly includes a roller guide rail 2 horizontally arranged on the inner top wall of the test box 12. A guide slider 1 is drivingly connected to the roller guide rail 2, and the roller guide rail 2 drives the guide slider 1 to move along its length direction through a driving member. The vertical telescopic assembly includes a telescopic driver 3 fixed on the guide slider 1. A telescopic cylinder 4 is vertically arranged downward at the bottom of the telescopic driver 3. A telescopic rod 5 that is driven to move up and down by the telescopic driver 3 is vertically arranged in the telescopic cylinder 4. The roller assembly is arranged at the lower end of the telescopic rod 5. The roller assembly includes a roller support frame 6 and a roller 7 rotatably arranged in the roller support frame 6. The roller support frame 6 is fixedly connected to the lower end of the telescopic rod 5. The laser detection assembly includes a cross beam plate guide rail 8 horizontally arranged in the middle of the test box 12. A cross beam plate 13 is horizontally slidably arranged on the cross beam plate guide rail 8. The cross beam plate 13 is driven by a driving member to move left and right in the transverse direction of the cross beam plate guide rail 8. A plurality of laser displacement sensors 14 are arranged at intervals on the bottom surface of the cross beam plate 13. The detection direction of the laser displacement sensors 14 faces the direction of the specimen 9. The laser displacement sensors 14 are connected to a photoelectric receiver 16 through wires, and the photoelectric receiver 16 is connected to a data analysis terminal 17 through wires.

[0030] The roller guide rail 2 is horizontally placed on the inner top wall of the test box body 12, and the guide slider 1 is drivingly connected to the roller guide rail 2. When the driving member is started, it drives the guide slider 1 to move along the length direction of the roller guide rail 2, thereby realizing lateral movement. The telescopic drive 3 is fixed on the guide slider 1, and it drives the telescopic rod 5 in the telescopic cylinder 4 to move up and down. The roller assembly (including the roller support frame 6 and the roller 7) is arranged at the lower end of the telescopic rod 5 and moves up and down as the telescopic rod 5 moves. When the guide slider 1 moves along the roller guide rail 2, the roller assembly also moves accordingly and rolls on the surface of the specimen 9 to simulate the influence of vehicle driving on the road surface. The cross beam plate 13 slides horizontally on the cross beam plate guide rail 8 through the driving member, so that the laser displacement sensor 14 on its bottom surface can move along the width direction of the specimen 9. The laser displacement sensor 14 emits laser light towards the specimen 9 and receives the reflected laser light, thereby measuring the rut depression depth on the specimen surface and the convex deformation height on both sides. The measurement data is transmitted to the photoelectric receiver 16 through a wire and further transmitted to the data analysis terminal 17 for processing and analysis.

[0031] Through the coordinated work of the transverse movement component and the vertical telescopic component, this device simulates the rolling process of vehicle driving on the road surface, and uses the laser detection component to accurately measure the rut depression depth and the convex deformation height on both sides, providing effective data for the performance test and evaluation of road materials.

[0032] Specifically, as shown in the figure, 4 - 8 laser displacement sensors 14 are arranged on the cross beam plate 13 relative to the rut print position, and 2 - 4 laser displacement sensors 14 are arranged relative to the rut print edge position. The laser displacement device sweeps across the rut position, measures the distance from each sensor to the specimen, scans 3 - 5 contour lines at the center position of the wheel print, and scans 2 - 3 contour lines at the edge position, thereby obtaining the cross-sectional height curve of the specimen, and finally the specific shape of the rut is displayed through the data analysis terminal 17. As Figure 3 shown, where H1 represents the absolute rut depth, H2 represents the relative rut depth, h1 is the convex depth on the left side, and h2 is the convex depth on the right side. The so-called "absolute" rut depth refers to the permanent deformation of the asphalt specimen surface downward relative to the external calibration point of the specimen; the "relative" rut depth refers to the distance from the lowest point of the depression in the rut belt to the connection line of the highest points of the convexities in the middle on both sides.

[0033] Specifically, as shown in the figure, a temperature sensor 18 for real-time detection of the temperature inside the box is arranged in the test box body 12.

[0034] Specifically, as shown in the figure, it further includes a control component 15, and the control component 15 is electrically connected to the driving member, the telescopic drive, and the temperature sensor through wires.

[0035] Specifically, as shown in the figure, a test mold 10 for clamping and fixing the specimen 9 is arranged on the test bench 11.

[0036] The operation process of the present utility model is as follows:

[0037] After connecting the test box body 12 to the power supply and setting the test temperature, start the test. Place the asphalt mixture sample in the sample mold for fixation, and adjust the position of the sample according to the test requirements. Control the telescopic driver and guide pulley through the control panel system to adjust the position of the roller, and set the moving speed, moving frequency, and pressure of the roller, etc. Click the start button to start the test. After the test is completed, retract the roller to a suitable position through the control panel. Control the crossbeam plate and laser displacement sensor to work through the control panel, so that the crossbeam plate scans the sample along the guide rail to obtain the displacement data from the rut to the laser displacement sensor. Finally, the rut shape is displayed through the data analysis terminal.

[0038] Under the action of vehicle load, different degrees of deformation will occur on the surface and inside of the road surface. At present, the indoor rut test depth detector only considers the depression deformation of the sample and does not consider the development of the convex deformation of the sample. This device can comprehensively measure the rut depth of the asphalt mixture in the indoor rut test with the help of laser displacement sensors and photoelectric receivers, can better simulate the rut situation of the real road surface, make it closer to the actual situation, and realize the measurement of concave and convex deformation in the indoor rut depth detection. This device uses multiple laser displacement sensors for multi-point measurement, can obtain very accurate data, and provide a more accurate rut shape. This device uses the point laser rut detection technology combined with the indoor rut test device to complete the vehicle detection in a very short time, and can automatically generate the deformation curve and rut shape relying on the data analysis terminal, thereby improving the work efficiency.

[0039] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0040] In addition, it should be understood that although this specification is described according to the embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automated rut depth testing device for matching the actual road surface, characterized in that It includes a test box body (12), a test bench (11) for fixing a specimen (9) is arranged inside the test box body (12), a transverse movement assembly is horizontally arranged on the top surface of the inner wall of the test box body (12), the transverse movement assembly drives the vertical telescopic assembly to move horizontally, a roller assembly is arranged at the telescopic end of the vertical telescopic assembly, and the transverse movement assembly drives the roller assembly to roll back and forth along the specimen (9) to form a rut. A laser detection assembly for testing the depression deformation depth of the rut and the convex deformation height on both sides of the rut is arranged in the middle of the test box body (12).

2. The automated rut depth testing device for matching the actual road surface according to claim 1, characterized in that, The transverse movement assembly includes a roller guide rail (2) horizontally arranged on the inner top wall of the test box body (12), a guide slider (1) is drivingly connected on the roller guide rail (2), and the roller guide rail (2) drives the guide slider (1) to move along its length direction through a driving member.

3. The automated rut depth testing device for matching the actual road surface according to claim 2, wherein, The vertical telescopic assembly includes a telescopic driver (3) fixed on the guide slider (1), a telescopic cylinder (4) is vertically arranged downward at the bottom of the telescopic driver (3), a telescopic rod (5) driven by the telescopic driver (3) to move up and down is vertically arranged in the telescopic cylinder (4), and the roller assembly is arranged at the lower end of the telescopic rod (5).

4. An automated rut depth testing device for matching the actual road surface according to claim 3, characterized in that, The roller assembly includes a roller support frame (6) and a roller (7) rotatably arranged inside the roller support frame (6), and the roller support frame (6) is fixedly connected to the lower end of the telescopic rod (5).

5. An automated rut depth testing device for matching the actual road surface according to claim 4, characterized in that, The laser detection assembly includes a cross beam plate guide rail (8) horizontally arranged in the middle of the test box body (12), a cross beam plate (13) is horizontally slidably arranged on the cross beam plate guide rail (8), the cross beam plate (13) is driven by a driving member to move left and right in the horizontal direction of the cross beam plate guide rail (8), a plurality of laser displacement sensors (14) are arranged at intervals on the bottom surface of the cross beam plate (13), the detection direction of the laser displacement sensors (14) faces the direction of the specimen (9), the laser displacement sensors (14) are connected to a photoelectric receiver (16) through wires, and the photoelectric receiver (16) is connected to a data analysis terminal (17) through wires.

6. The automated rut depth testing device for matching the actual road surface according to claim 5, wherein 4 - 8 laser displacement sensors (14) are arranged at positions of the cross beam plate (13) relative to the rut mark, and 2 - 4 laser displacement sensors (14) are arranged at positions of the cross beam plate (13) relative to the edge of the rut mark.

7. An automated rut depth testing device for matching the actual road surface according to claim 5, characterized in that, A temperature sensor (18) for real - time detecting the temperature inside the box is arranged inside the test box body (12).

8. An automated rut depth testing device for matching the actual road surface according to claim 7, characterized in that, It further includes a control component (15), and the control component (15) is electrically connected to the driving member, the telescopic driver, and the temperature sensor through wires.

9. An automated rut depth testing device for matching the actual road surface according to claim 5, characterized in that A test die (10) for clamping and fixing the specimen (9) is arranged on the test bench (11).

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