Method, system and device for testing depth of dense contact type structure

Abstract

The invention relates to a dense contact type structure depth testing method, system and device, and belongs to the technical field of pavement structure depth detection. Comprising the following steps: placing a test device above a to-be-tested area, leveling, and moving a probe plate of the test device downwards; when the probe on the probe plate shrinks to a preset condition, the probe plate stops moving downwards, and displacement data of the probe in a current state is acquired; determining a theoretical displacement reference surface, and calculating a first effective displacement according to the theoretical displacement reference surface and the displacement data; performing abnormal value screening and elimination on the first effective displacement to obtain a second effective displacement, and calculating a structure depth evaluation index value and a reference index value of the to-be-tested area according to the second effective displacement; and according to the evaluation index value and the reference index value, evaluating the structure depth of the to-be-tested area. According to the invention, the detection efficiency and precision are improved, the operation process is simplified, the requirement on the equipment performance is reduced, and the dependence on the environmental condition in the detection process is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of pavement texture depth detection, and in particular to a dense contact type texture depth testing method, system and device. Background Art

[0002] The anti-skid performance of the pavement is mainly affected by various factors, including pavement materials, pavement texture, pavement structure, and environmental conditions, etc. At present, the evaluation of the anti-skid performance of the pavement mainly depends on indicators such as pavement texture depth and pavement friction coefficient. Among them, the pavement texture depth is one of the important parameters for measuring the anti-skid performance of the pavement. Existing pavement texture depth detection methods have their own advantages and disadvantages, mainly including: The first category is the manual sand spreading method. This method is based on spreading sand with a known volume on the measuring points of the test road surface, so that the sand is embedded in the concave and convex gaps on the surface, and the area covered by spreading and flattening is measured. The texture depth is determined by calculating the ratio of the volume of the sand to the covered area. This method is simple to operate, but has low efficiency, is greatly affected by human factors, and has limited accuracy. The second category is the electric sand spreading method. This method spreads a fixed volume of sand on the pavement and calculates the texture depth by comparing it with the spreading length on a glass plate. Compared with the manual sand spreading method, the electric sand spreading method improves the detection efficiency and accuracy, but still has problems such as complex equipment and high operation requirements. The third category is the vehicle-mounted laser method. This method uses the principle of laser ranging to measure the depth changes on the surface of ground material particles and between the particles. This method can output the average depth data within a certain spacing length along the cross-section of the measuring line, and has the advantages of high efficiency, fast speed, and high degree of automation. However, its equipment cost is high, and it is more sensitive to environmental conditions (such as light, dust, etc.), which affects the measurement accuracy. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the low efficiency, low accuracy, complex operation, high equipment cost, and dependence on environmental conditions in the prior art.

[0004] In a first aspect, to solve the above technical problem, the present invention provides a dense contact type texture depth testing method, including: S1. Place the testing device above the area to be tested. After leveling, move the needle plate of the testing device downward; when the needles on the needle plate contract to a preset condition, the needle plate stops moving downward, and obtain the displacement data of the needles in the current state; S2. Determine the theoretical displacement reference plane, and calculate the first effective displacement according to the theoretical displacement reference plane and the displacement data; S3. Screen and eliminate outliers from the first effective displacement to obtain the second effective displacement; S4. Calculate the evaluation index value of the texture depth of the area to be tested based on the second effective displacement, and obtain the reference index value of the texture depth; S5. Evaluate the texture depth of the area to be tested based on the evaluation index value and the reference index value.

[0005] In one embodiment of the present invention, in S4, the evaluation index value of the texture depth of the area to be tested is the average value of the second effective displacement.

[0006] In one embodiment of the present invention, the reference index value includes a standard deviation and a coefficient of variation. The steps for obtaining the standard deviation and the coefficient of variation are as follows: calculate the standard deviation of the second effective displacement based on the second effective displacement; calculate the coefficient of variation based on the standard deviation.

[0007] In one embodiment of the present invention, the preset condition is that one of the styli on the stylus plate retracts to a threshold value or the number of styli that start to retract exceeds a preset ratio.

[0008] In one embodiment of the present invention, the method for screening and eliminating outliers in S3 includes: the interquartile range method and the Z-Score method.

[0009] In one embodiment of the present invention, the stylus includes a first-section stylus, a second-section stylus, and a third-section stylus; the third-section stylus is connected to the second-section stylus, and the second-section stylus is connected to the first-section stylus; the length of the first-section stylus is less than the length of the second-section stylus, and the length of the second-section stylus is less than the length of the third-section stylus; wherein the first-section stylus is solid, and the second-section stylus and the third-section stylus are hollow.

[0010] Second, to solve the above technical problems, the present invention provides a dense contact type texture depth testing system, including: A data acquisition module, configured to place the testing device above the area to be tested, level it, and then move the stylus plate of the testing device downward; when the styli on the stylus plate retract to a preset condition, the stylus plate stops moving downward, and acquire the displacement data of the styli in the current state; A screening module, configured to determine a theoretical displacement reference plane, calculate a first effective displacement based on the theoretical displacement reference plane and the displacement data; screen and eliminate outliers from the first effective displacement to obtain a second effective displacement; A calculation module, configured to calculate the evaluation index value of the texture depth of the area to be tested based on the second effective displacement, and obtain the reference index value of the texture depth; An evaluation module is used to evaluate the structural depth of the area to be tested according to the evaluation index value and the reference index value.

[0011] In a third aspect, in order to solve the above technical problems, the present invention provides a dense contact structure depth testing device, comprising: The acquisition device comprises a probe box, wherein the probe box comprises a probe plate and the probe, the probe is mounted on the probe plate, and data is acquired from the area to be tested through the probe; A driving transmission device, used for driving the measuring needle plate to move up and down and transmitting the displacement of the measuring needle; A controller is used to receive the displacement and send a control signal to the drive transmission device; the controller includes the above-mentioned dense contact structure depth testing system.

[0012] In one embodiment of the present invention, the collecting device comprises a plurality of legs, and each of the legs comprises a plurality of cleaning air blowing holes for cleaning the area to be tested.

[0013] In one embodiment of the present invention, the supporting legs further include a level adjustment device.

[0014] The above technical solution of the present invention has the following beneficial effects compared with the prior art: (1) The dense contact structural depth testing method, system and device described in the present invention can accurately capture the actual structural depth of the road surface by stopping the movement of the probe plate when the probe reaches the preset contraction condition, effectively reducing the measurement error and damage caused by excessive compression of the probe. In addition, a screening process is performed on the collected displacement data to eliminate abnormal values, ensuring that the data used for structural depth calculation is both accurate and reliable, thereby significantly improving the credibility of the final measurement results.

[0015] (2) The automated measurement process of the present invention not only reduces the need for manual operation and improves measurement efficiency, but also reduces potential errors caused by human factors.

[0016] (3) The present invention allows the user to preset different shrinkage conditions according to different test conditions and requirements, thereby adapting to the changing test environment and road conditions. In addition, the present invention not only simplifies the operation process, making the entire test process easy to operate and maintain, but also facilitates regular calibration and inspection, ensuring the long-term stability of the equipment and the accuracy of the measurement results.

[0017] (4) The present invention integrates multiple cleaning air holes on each leg, which solves the problem of manual cleaning of the test area before testing. The test area is cleaned automatically, freeing up labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To make the content of the present invention easier to be clearly understood, the following further elaborates on the present invention in detail according to specific embodiments of the present invention in conjunction with the accompanying drawings, where: Figure 1 It is a flowchart of a method for testing the depth of a dense contact structure in a preferred embodiment of the present invention; Figure 2 It is a structural diagram of a probe plate and a probe in a preferred embodiment of the present invention; Figure 3 It is a schematic diagram of a theoretical displacement reference plane in a preferred embodiment of the present invention; Figure 4 It is a structural diagram of a device for testing the depth of a dense contact structure in a preferred embodiment of the present invention.

[0019] Explanation of reference numerals in the accompanying drawings of the specification: 1. Probe plate; 2. Probe; 3. Probe box; 4. Driving and transmission device; 5. Controller; 6. Leg; 7. Horizontal adjustment device; 8. Level bubble; 9. Cleaning air hole. Specific embodiments

[0020] The following further describes the present invention in conjunction with the accompanying drawings and specific embodiments, so that those skilled in the art can better understand the present invention and be able to implement it, but the embodiments cited do not limit the present invention.

[0021] In traditional pavement texture depth detection methods, the manual sand spreading method is widely used because of its intuitive principle, simple operation, and mature technology. However, this method requires a large amount of manual labor intensity during implementation, and the sand used can only be used once and cannot be reused. In addition, the manual sand spreading method lacks an effective mechanism for identifying and eliminating abnormal data during processing, which is prone to large human errors and lacks a unified actual operation standard.

[0022] The electric sand spreading method simplifies the operation process through electric equipment and reduces the dependence on manual labor. Nevertheless, the operation steps of this method are relatively complex. It is necessary to accurately pour the sand into the measuring cylinder first and then transfer it to the sand spreader, which requires high control of details. Before the test, the equipment also needs to be accurately calibrated, and there is also the problem of being unable to effectively identify and eliminate abnormal data.

[0023] The vehicle-mounted laser method is favored for its high-efficiency testing capabilities. It can collect data synchronously with other data such as road surface flatness and rutting to achieve automated operation, thereby saving human resources. However, this method is not suitable for roads that are severely damaged, waterlogged, snow-covered or mud-covered. The test results it outputs are based on the average depth data within a certain interval along the test section, which is different from the sand-paving method which is based on the average depth data within a certain area. In addition, the vehicle-mounted laser method has high requirements for the driving conditions of the test vehicle. Before the test, it is necessary to establish a correlation model with the sand-paving method to ensure that the correlation coefficient R value is not less than 0.97. At the same time, it also has high requirements for the acquisition response frequency of the laser sensor.

[0024] In view of the limitations of traditional pavement structure depth detection methods, embodiments of the present invention propose a dense contact structure depth testing method, system and device. The present invention uses a dense contact acquisition device to obtain pavement structure depth information and transmits the data to a controller in real time. The controller can not only display the specific displacement of each probe, but also conduct comprehensive data statistics and analysis on the displacement of all probes in combination with the actual slope of the on-site road and other working conditions. On this basis, the system can flexibly choose whether to eliminate abnormal values ​​caused by abnormal road conditions such as holes and protrusions according to actual conditions, and then accurately calculate the pavement structure depth of the test point. The present invention effectively solves many problems existing in traditional structure depth detection methods, significantly improves detection efficiency and accuracy, and at the same time greatly simplifies the operation process, reduces dependence on equipment performance, and reduces the requirements for environmental conditions during the detection process.

[0025] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0026] Example 1: Reference Figures 1 to 2 As shown, an embodiment of the present invention provides a dense contact structure depth testing method, including but not limited to the following steps: S1. Place the test device above the area to be tested, and move the probe plate 1 of the test device downward after leveling; when the probe 2 on the probe plate 1 shrinks to a preset condition, the probe plate 1 stops moving downward, and obtains the displacement data of the probe 2 in the current state; S2, determining a theoretical displacement reference plane, and calculating a first effective displacement according to the theoretical displacement reference plane and the displacement data; S3, screening and eliminating abnormal values ​​of the first effective displacement to obtain a second effective displacement; S4. Calculate the structural depth evaluation index value of the area to be tested according to the second effective displacement, and obtain a reference index value of the structural depth; S5. Evaluate the texture depth of the area to be tested according to the evaluation index value and the reference index value.

[0027] An embodiment of the present invention provides a dense contact type texture depth testing method. By stopping the movement of the probe plate when the probe 2 contracts to a preset condition, the actual texture depth of the road surface can be accurately captured, reducing measurement errors and damage caused by excessive compression. By determining the theoretical displacement reference plane to calculate the first effective displacement amount, a unified reference standard for data processing is provided, effectively eliminating errors caused by abnormal road surface conditions. Screening and removing outliers from the first effective displacement amount ensure that the data used to calculate the texture depth is accurate and reliable, thereby improving the credibility of the final result. In the evaluation step, the texture depth evaluation index value is calculated based on the second effective displacement amount, and the reference index value of the texture depth is obtained. This evaluation method based on actual measurement data and combined with statistical indicators can scientifically and comprehensively reflect the texture depth of the area to be tested. Therefore, the embodiment of the present invention allows different contraction conditions to be preset according to different test conditions and requirements, making the measurement method more flexible and capable of adapting to different test environments and road surface conditions. At the same time, this method also simplifies the operation process, not only making the entire test process easier to operate and maintain, but also facilitating regular calibration and inspection. In addition, the embodiment of the present invention realizes the function of collecting texture depth data of a certain area of the road surface.

[0028] Specifically, in step S1, the preset condition is that one of the probes 2 on the probe plate 1 contracts to a threshold value, or the number of probes 2 starting to contract exceeds a preset ratio. In this embodiment, the preset ratio is set to 95%. Specifically, when a certain probe 2 contracts to the threshold value, or when more than 95% of the probes 2 start to contract, the probe plate 1 will stop moving downward, and the displacement data of all probes 2 will be obtained in this state. Among them, the threshold value can be reasonably set according to the actual on-site working conditions.

[0029] Further, referring to Figure 2 , in this embodiment, the area of the probe plate 1 is preferably 300mm * 300mm. On the side of the probe plate 1 facing the area to be tested, a plurality of probes 2 are evenly arranged. The probe plate 1 drives the probes 2 to move up and down in a direction perpendicular to the area to be tested.

[0030] Furthermore, the layout spacing between the stylus tips 2 is preferably set to 3 mm (usually not greater than 3 mm) to ensure the measurement coverage and accuracy. Each stylus tip 2 adopts a multi-section movable design to reduce the total length of the stylus tip 2 and save space. The stylus tip 2 includes a first-section stylus, a second-section stylus, and a third-section stylus. Among them, the first-section stylus is connected to the second-section stylus, the second-section stylus is connected to the third-section stylus, and the length of the first-section stylus is less than that of the second-section stylus, the length of the second-section stylus is less than that of the third-section stylus. The first-section stylus is solid, and the second-section stylus and the third-section stylus are hollow. Such a design enables the first-section stylus to retract into the second section, and the second-section stylus to retract into the third section, thus achieving compact storage and flexible measurement. In addition, the lengths of these three sections of stylus tips can be adjusted according to specific application scenarios. For example, the length of the first-section stylus can be set to 10 mm, the length of the second-section stylus can be set to 15 mm, and the length of the third-section stylus can be set to 25 mm.

[0031] Furthermore, the first-section stylus adopts a solid structure, and the diameter of its end can be set according to actual needs, such as 0.3 mm or 0.5 mm. At the same time, an arc is designed at the end to meet diverse test requirements. In contrast, the second and third-section stylus tips adopt a hollow structure design to meet the telescopic requirements of the first-section stylus and the second-section stylus. In addition, each stylus tip 2 is replaceable, and this design increases the convenience of maintenance and use of the stylus tip 2.

[0032] The stylus tip 2 designed by the above method can capture the subtle changes in the pavement texture depth with a test accuracy of 0.01 mm. This high-precision measurement ability ensures the accuracy and reliability of the measurement results.

[0033] Specifically, the traditional manual sand spreading method evenly spreads a fixed volume of sand on the surface of the road section to be measured, so that the sand grains are embedded in the uneven gaps of the road surface. Subsequently, the diameters of the sand layer formed into a circle are measured in two perpendicular directions, and the average value is taken to calculate the circular area. Finally, based on the volume of the sand and the calculated area, the texture depth of the road surface is deduced. . The calculation formula is as follows: ; where represents the volume of the sand (25 cm 3 ), represents the average diameter of the flattened sand (mm); represents the pi.

[0034] This method calculates the texture depth through the volume of sand and the paving area. However, its limitation is that it cannot effectively eliminate the influence of abnormal factors such as road surface holes and protrusions. The existence of these outliers easily leads to a certain deviation between the test results and the actual working conditions, thus affecting the accuracy and reliability of the test. To overcome this problem, the embodiments of the present invention screen the obtained displacement data of the measuring needle to eliminate outliers, ensuring that the test results are closer to the actual working conditions and improving the accuracy and reliability of the test.

[0035] Specifically, for steps S2 and S3, a screening process is performed on the calculated first effective displacement amount, and the outliers therein are removed to ensure the accuracy and reliability of the obtained effective displacement amount data. The methods to achieve this goal include the IQR method (interquartile range method), the Z-Score method, and a custom rejection method.

[0036] Exemplarily, for the IQR method (interquartile range method), its specific steps are as follows: First, calculate the upper quartile (Q3) and the lower quartile (Q1) of the actual displacement data; then determine the interquartile range (IQR), and the calculation formula is IQR = Q3 - Q1; then identify and remove those data points that fall outside the range of Q1 - 1.5×IQR and Q3 + 1.5×IQR.

[0037] Exemplarily, for the Z-Score method, its specific steps are as follows: First, calculate the Z-Score (standard score) of each data point, which is a standardized measure of the difference between the data point and the mean. Those data points with an absolute value of Z-Score greater than 3 are regarded as outliers and removed.

[0038] In practical applications, whether to perform outlier rejection and which outlier rejection method to adopt can be flexibly selected according to the specific data characteristics and analysis requirements.

[0039] Specifically, in step S4, an evaluation index value of the texture depth is calculated according to the second effective displacement amount obtained in step S3, and a reference index value of the area to be tested is obtained. In this embodiment, the evaluation index value is the average value of the second effective displacement amount, and the reference index values include the standard deviation and the coefficient of variation. Among them, the specific steps to obtain the evaluation index value and the reference index value are as follows: Step 1: Obtain the displacement data of the area to be tested through the measuring needle 2.

[0040] Step 2: According to the on-site working conditions (such as slope, etc.), use the linear principle to determine the theoretical displacement reference plane. According to the theoretical displacement reference plane and the displacement data of the measuring needle 2, calculate the first effective displacement amount, where the mathematical expression of the first effective displacement amount is where represents the total number of the measuring needles 2.

[0041] Furthermore, referring to Figure 3 , the calculation formula for the effective displacement of each probe 2 is: ; where represents the effective displacement of the -th probe 2, represents the displacement data of the actual probe of the -th probe 2, and represents the theoretical displacement reference plane data of the

[0042] -th probe 2. Step 3: For the effective displacement of each probe 2, select whether to reject outliers and determine the outlier rejection method, so as to obtain the final second effective displacement for calculation. Calculate the corresponding average value , standard deviation , and coefficient of variation

[0043] Specifically, the calculation formulas for the average value and standard deviation are respectively expressed as: ; ; where represents the total number of second effective displacement data.

[0044] Furthermore, the calculation formula for the coefficient of variation is expressed as: .

[0045] The calculated average value is the evaluation index value of the construction depth, while the standard deviation and the coefficient of variation are the reference index values for analyzing the discreteness and uniformity of the construction depth.

[0046] Specifically, in step S5, the criteria for evaluation based on the evaluation index values are as follows: When the area to be tested is a cement concrete surface course, it includes expressways and other roads, where both expressways and other roads cover general sections and special sections. For the general sections of expressways, if the evaluation index value falls within the first interval, it is determined that the texture depth meets the requirements; for the special sections of expressways, the evaluation index value needs to be within the second interval. For the general sections of other roads, when the evaluation index value belongs to the third interval, it is regarded that the texture depth meets the requirements; for the special sections of other roads, the evaluation index value should be within the fourth interval. When the area to be tested is an asphalt concrete surface course or an asphalt macadam (gravel) surface course, the evaluation index value only needs to meet the design requirements. In addition, it should be noted that due to differences in general pavement standards or road design schemes in practical applications, the specific values of the above four intervals are not fixed.

[0047] Exemplarily, the first interval is from 0.7 to 1.1; the second interval is from 0.8 to 1.2; the third interval is from 0.5 to 1.0; the fourth interval is from 0.6 to 1.1.

[0048] In step S5, by setting clear evaluation criteria and flexible interval ranges and adopting a differential treatment method, the uniqueness of each section is fully considered. This method avoids evaluation errors caused by using a unified standard, thus being able to more accurately reflect the actual condition of the road.

[0049] The dense contact type texture depth test method provided by the embodiment of the present invention has significant advantages compared with the traditional methods. First, aiming at the problems of high manual labor intensity and large human errors during the sand spreading process in the manual sand spreading method, this method releases labor force through automated operation and significantly improves the stability of the test results. Second, aiming at the problems of complicated operation steps and the need for calibration before the test in the electric sand spreading method, this method simplifies the test steps, making it simpler and more convenient, thus effectively improving the detection efficiency.

[0050] In addition, the present invention solves the problem that the sand used in the manual sand spreading method and the electric sand spreading method can only be used once and cannot be reused, thus saving the operation cost and reducing resource waste. At the same time, aiming at the problem that the manual sand spreading method and the electric sand spreading method cannot identify and eliminate abnormal data, resulting in data distortion, this method can effectively identify and eliminate abnormal data, making the test results more reasonable and having a higher reliability.

[0051] The present invention also optimizes the test results of the vehicle-mounted laser method. The test results output by the traditional vehicle-mounted laser method are the average depth data within a certain spacing length along the cross-section of the measuring line, while the method of the present invention changes the test results from line average data to surface average data, which is more in line with the actual road use conditions. In addition, the method of the present invention reduces the high requirements of the vehicle-mounted laser method for the driving conditions of the test vehicle and the acquisition response frequency of the laser sensor, reduces the limiting conditions during the test, and reduces the high-performance requirements of the equipment.

[0052] In addition, the embodiment of the present invention solves the problem that the signal of the vehicle-mounted laser method is interfered, and significantly improves the stability and accuracy of the test results. Aiming at the problem that a correlation relationship needs to be established with the sand paving method before the vehicle-mounted laser method test, the method of the present invention reduces the early work investment and makes the test results more direct and accurate.

[0053] Embodiment 2: Based on the same inventive concept, this embodiment provides a dense contact type texture depth test system, and the principle of solving problems is similar to that of a dense contact type texture depth test method provided in Embodiment 1, and the repeated parts will not be described again.

[0054] This embodiment provides a dense contact type texture depth test system, including: A data acquisition module, which is used to place the test device above the area to be tested, level it and then move the needle plate 1 of the test device downward; when the needles 2 on the needle plate 1 contract to a preset condition, the needle plate 1 stops moving downward, and acquires the displacement data of the needles 2 in the current state; A screening module, which is used to determine the theoretical displacement reference plane, calculate the first effective displacement according to the theoretical displacement reference plane and the displacement data; screen and eliminate the outliers for the first effective displacement to obtain the second effective displacement; A calculation module, which is used to calculate the texture depth evaluation index value of the area to be tested according to the second effective displacement, and acquire the reference index value of the texture depth; An evaluation module, which is used to evaluate the texture depth of the area to be tested according to the evaluation index value and the reference index value.

[0055] Embodiment 3: Referring to Figure 4 As shown, this embodiment provides a dense contact type texture depth test device, including: An acquisition device, including a needle box 3, the needle box 3 includes a needle plate 1 and needles 2, the needles 2 are installed on the needle plate 1, and data of the area to be tested is acquired through the needles 2; A driving and transmission device 4, which is used to drive the needle plate 1 to move up and down and transmit the displacement of the needles 2; A controller 5, which is used to receive the displacement and send a control signal to the driving and transmission device 4; the controller 5 includes the dense contact type texture depth test system provided in Embodiment 2.

[0056] The dense contact type texture depth testing device provided by this embodiment is an integrated device, which reduces unnecessary accessory conditions such as physical wiring or wireless transmission, saving device space and device cost. High-density data acquisition is achieved through the probe board 1 and the probes 2 installed thereon. At the same time, by controlling the movement of the probe board 1, the subtle changes in the road surface can be accurately captured. Through the integrated, automated and refined measurement methods, this embodiment significantly improves the efficiency, accuracy and reliability of the road surface texture depth testing. In addition, this automated measurement process reduces manual operations, improves the measurement efficiency, and reduces the errors caused by human factors.

[0057] Specifically, the acquisition device includes a probe box 3 and legs 6. Inside the probe box 3, a probe board 1 with a size of 300mm×300mm is assembled, and probes 2 are evenly installed on the board. These probes 2 are densely arranged at an interval of 3mm. The length of each probe 2 is designed to be 50mm and consists of three sections (10mm, 15mm and 25mm respectively), so as to achieve a test range of 0-25mm. The diameter of the tip of the probe 2 can be 0.3mm or 0.5mm and has a curvature to adapt to different test surfaces. The resolution of the above-designed probe 2 can be as high as 0.01mm, ensuring high-precision measurement. It should be noted that the parameters such as the size of the probe board 1, the interval of each probe 2, and the size of the probe 2 are the optimal results given in this embodiment and are not fixed. In actual applications, these parameters can be appropriately adjusted according to specific test requirements and conditions to achieve the best measurement effect.

[0058] In this embodiment, the acquisition device includes 4 legs 6, which are used to provide stable support for the device. Each leg 6 is equipped with a leveling device 7, which works in cooperation with the spirit level 8 on the acquisition device (in this embodiment, the number of spirit levels 8 is preferably set to 4) to adjust the entire dense contact type texture depth testing device to a horizontal state. This design can eliminate the measurement errors caused by the tilt of the device, thereby improving the reliability of the measurement results.

[0059] Furthermore, a plurality of cleaning air nozzles 9 are integrated on each leg 6, and the cleaning air nozzles 9 can be started or stopped by the controller 5 to achieve the cleaning function and ensure that the area to be tested is in a clean state. This design solves the problem of manual cleaning of the test area before testing and cleans the test area automatically, releasing labor.

[0060] Specifically, the driving and transmission device 4 includes a driving device and a data transmission device. The driving device is used to drive the probe board 1 to move in the vertical direction, thereby driving the probes 2 fixed on the probe board 1 to move up and down synchronously to achieve the detection of the pavement texture depth. The data transmission device is responsible for collecting the data information generated by the movement of the probes 2 in real time and transmitting it to the controller 5. After receiving these data, the controller 5 performs further processing and analysis so that the operator can accurately evaluate the texture depth of the area to be tested. Such a design ensures the automation of the measurement process and the accuracy of data collection, improving the overall test efficiency and reliability.

[0061] Furthermore, in this embodiment, the driving and transmission device 4 also integrates a battery box, which is responsible for providing the required energy for the entire device. The pavement texture depth testing device is equipped with a built-in battery box, which provides a convenient power source for the device during on-site testing. The design of the built-in battery box not only enhances the portability of the device but also ensures effective test operations without an external power source, thereby improving the flexibility and adaptability of the test.

[0062] Specifically, the controller 5 integrates various functions such as display, storage, and analysis, and can accurately control the driving device according to instructions to achieve the up and down movement and start and stop of the probe board 1. Among them, the controller 5 includes the dense contact type pavement texture depth testing system provided in Embodiment 2. When performing data analysis, the system combines the displacement data of the probes 2 with working condition parameters such as the actual slope of the on-site road for comprehensive data statistics and analysis. This process includes determining the theoretical displacement reference plane, calculating the effective displacement, and intelligently identifying and eliminating outliers that may cause measurement deviations, such as holes and protrusions. After this series of data processing, the controller 5 can finally accurately calculate the average value, standard deviation, and coefficient of variation of the pavement texture depth at each test point, providing reliable data support for pavement evaluation and maintenance.

[0063] Furthermore, the controller 5 also includes an operation display. This display can not only intuitively show the pavement texture depth of the test point but also be used to set the theoretical displacement reference plane and define the boundaries of outliers. The operation display provides a user-friendly interface, enabling users to easily adjust parameters and view results, thereby improving the convenience of operation and the accuracy of data interpretation. Through this integrated display, users can monitor the measurement process in real time and quickly obtain accurate test results, enhancing the practicality and efficiency of the entire test device.

[0064] Specifically, referring to Figure 4, the assembly structure of the above-mentioned acquisition device, drive transmission device 4 and controller 5 is as follows: The probe box 3 is connected to the drive transmission device 4 through a mechanical structure. This design enables the drive device of the drive transmission device 4 to accurately control the vertical movement of the probe box 3, thereby achieving accurate measurement of the pavement texture depth. The controller 5 is connected to the drive transmission device 4 by electrical or wireless means, responsible for sending control signals to manipulate the movement of the probe box 3 and receiving the displacement data from the probe 2. The acquisition device is arranged below the drive transmission device 4, and the legs 6 are firmly placed on the pavement to be tested to support the entire device and ensure the stability of the measurement. Such a structural layout not only ensures the operational convenience and measurement accuracy of the entire test device, but also enhances the stability and durability of the device, enabling it to adapt to various pavement test environments.

[0065] Furthermore, the specific operation steps of the dense contact type pavement texture depth test device provided in this embodiment are as follows: Step 1: Place the test device directly above the area to be tested, and rotate and adjust the leveling device 7 until the four spirit levels 8 on the test device are all in a horizontal state.

[0066] Step 2: Activate the device cleaning function, and blow out gas through the cleaning air holes 9 of the legs 6 to clean the area to be tested, ensuring that there are no other interfering factors when the probe 2 contacts the pavement, thereby guaranteeing the accuracy of the measurement.

[0067] Step 3: The controller 5 sends a control signal to control the drive device to drive the entire probe plate 1 to move downward. When any one probe 2 shrinks to the set threshold, or when more than 95% of the probes 2 start to shrink, the probe plate 1 stops moving downward. In this state, the displacement data of the probe 2 is collected.

[0068] Step 4: Through operating the display, determine the theoretical displacement reference plane and the outlier limit. The controller 5 analyzes the collected displacement data, eliminates the outliers, and calculates the pavement texture depth evaluation index value and the reference index value of this test point. Finally, the display outputs the pavement texture depth result of this test point, providing accurate data support for pavement evaluation and maintenance.

[0069] This embodiment significantly improves the measurement accuracy, operational convenience, data reliability and device stability through optimized measures such as precise level adjustment, cleaning function, automated data acquisition and processing. It is applicable to various complex working conditions and can effectively improve work efficiency and measurement quality.

[0070] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-usable program code.

[0071] The present application is described with reference to the flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each flow and / or block in the flowchart and / or block diagram, as well as the combination of flows and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, such that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0072] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, such that the instructions stored in the computer-readable memory generate a manufactured article including instruction means that implement the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0073] These computer program instructions can also be loaded onto a computer or other programmable data processing device, such that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process, and thus the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in Figure 1 one or more of the flows Figure 1 or blocks or the combination of blocks.

[0074] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to exhaustively list all implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A dense contact structure depth testing method, characterized in that: include: S1. Place the test device above the area to be tested, and move the probe plate of the test device downward after leveling; When the stylus on the stylus plate is retracted to a preset condition, the stylus plate stops moving downward, and the displacement data of the stylus in the current state is obtained; S2, determining a theoretical displacement reference plane, and calculating a first effective displacement according to the theoretical displacement reference plane and the displacement data; S3, screening and eliminating abnormal values ​​from the first effective displacement to obtain a second effective displacement; S4. Calculating a structural depth evaluation index value of the area to be tested according to the second effective displacement, and obtaining a reference index value of the structural depth; S5. Evaluate the structural depth of the area to be tested according to the evaluation index value and the reference index value.

2. A dense contact structure depth testing method according to claim 1, characterized in that: In S4, the structural depth evaluation index value of the area to be tested is an average value of the second effective displacement.

3. A dense contact structure depth testing method according to claim 1, characterized in that: The reference index value includes a standard deviation and a coefficient of variation; the steps of obtaining the standard deviation and the coefficient of variation are: calculating the standard deviation of the second effective displacement according to the second effective displacement; Based on the standard deviation, the coefficient of variation is calculated.

4. A dense contact structure depth testing method according to claim 1, characterized in that: The preset condition is: one of the measuring needles on the measuring needle plate shrinks to a threshold value or the measuring needle that begins to shrink exceeds a preset ratio.

5. A dense contact structure depth testing method according to claim 1, characterized in that: The methods for screening and eliminating outliers in S3 include: interquartile range method and Z-Score method.

6. A dense contact structure depth testing method according to claim 1, characterized in that: The measuring needle comprises a first section, a second section and a third section; the third section is connected to the second section, and the second section is connected to the first section; the length of the first section is smaller than the length of the second section, and the length of the second section is smaller than the length of the third section; wherein the first section is solid, and the second and third sections are hollow.

7. A dense contact structure depth testing system, characterized in that: include: A data acquisition module, used for placing a test device above the area to be tested, and moving the probe plate of the test device downward after leveling; When the stylus on the stylus plate shrinks to a preset condition, the stylus plate stops moving downward, and the displacement data of the stylus in the current state is obtained; A screening module, used to determine a theoretical displacement reference plane, and calculate a first effective displacement according to the theoretical displacement reference plane and the displacement data; Screening and removing abnormal values ​​from the first effective displacement to obtain a second effective displacement; A calculation module, used to calculate a structural depth evaluation index value of the area to be tested according to the second effective displacement, and obtain a reference index value of the structural depth; An evaluation module is used to evaluate the structural depth of the area to be tested according to the evaluation index value and the reference index value.

8. A dense contact structure depth testing device, characterized in that: include: The acquisition device comprises a probe box, wherein the probe box comprises a probe plate and the probe, the probe is mounted on the probe plate, and data is acquired from the area to be tested through the probe; A driving transmission device, used for driving the measuring needle plate to move up and down and transmitting the displacement of the measuring needle; A controller is used to receive the displacement and send a control signal to the drive transmission device; the controller includes a dense contact structure depth testing system as described in claim 7.

9. A dense contact structure depth testing device according to claim 8, characterized in that: The collecting device comprises a plurality of legs, and each of the legs comprises a plurality of cleaning air blowing holes for cleaning the area to be tested.

10. A dense contact structure depth testing device according to claim 9, characterized in that: The legs also include a leveling device.

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