A method, system and device for testing the texture depth of a dense contact type

Abstract

The present invention relates to a method, system and device for testing the texture depth of a dense contact type, belonging to the technical field of pavement texture depth detection. It includes: placing the testing device above the area to be tested, leveling it and then moving the probe plate of the testing device downward; when the probes on the probe plate contract to a preset condition, the probe plate stops moving downward, and the displacement data of the probes in the current state is obtained; determining the theoretical displacement reference plane, and calculating the first effective displacement according to the theoretical displacement reference plane and the displacement data; screening and eliminating outliers from the first effective displacement to obtain the second effective displacement, and calculating the texture depth evaluation index value and the reference index value of the area to be tested based on it; evaluating the texture depth of the area to be tested according to the evaluation index value and the reference index value. The present invention improves the detection efficiency and accuracy, simplifies the operation process, reduces the requirements for equipment performance, and reduces the dependence on environmental conditions during the detection process.

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-slip 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-slip 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-slip 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, making the sand embed into the concave and convex voids of the surface, and measuring the area covered after spreading and leveling. 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 calculates the texture depth by spreading a fixed volume of sand on the pavement and 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 the 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:

[0005] S1. Place the testing device above the area to be tested, level it and then move the probe board of the testing device downward; when the probes on the probe board contract to a preset condition, the probe board stops moving downward, and obtain the displacement data of the probes in the current state;

[0006] S2. Determine the theoretical displacement reference plane, and calculate the first effective displacement according to the theoretical displacement reference plane and the displacement data;

[0007] S3. Screen and eliminate the outliers from the first effective displacement to obtain the second effective displacement;

[0008] S4. Calculate the evaluation index value of the texture depth of the area to be tested according to the second effective displacement, and obtain the reference index value of the texture depth;

[0009] S5. Evaluate the texture depth of the area to be tested according to the evaluation index value and the reference index value.

[0010] 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.

[0011] In one embodiment of the present invention, the reference index value includes the standard deviation and the 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 according to the second effective displacement; calculate the coefficient of variation according to the standard deviation.

[0012] In one embodiment of the present invention, the preset condition is that one of the stylus pins on the stylus plate shrinks to the threshold or the number of the stylus pins that start to shrink exceeds a preset ratio.

[0013] In one embodiment of the present invention, the methods for screening and removing outliers in S3 include: the interquartile range method and the Z-Score method.

[0014] In one embodiment of the present invention, the stylus pin includes a first-section stylus pin, a second-section stylus pin, and a third-section stylus pin; the third-section stylus pin is connected to the second-section stylus pin, and the second-section stylus pin is connected to the first-section stylus pin; the length of the first-section stylus pin is less than the length of the second-section stylus pin, and the length of the second-section stylus pin is less than the length of the third-section stylus pin; wherein the first-section stylus pin is solid, and the second-section stylus pin and the third-section stylus pin are hollow.

[0015] Second, to solve the above technical problems, the present invention provides a dense contact type texture depth testing system, including:

[0016] 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 stylus pins on the stylus plate shrink to the preset condition, the stylus plate stops moving downward, and acquire the displacement data of the stylus pins in the current state;

[0017] A screening module, configured 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 remove outliers from the first effective displacement to obtain the second effective displacement;

[0018] A calculation module, configured to calculate an evaluation index value of the construction depth of the area to be tested according to the second effective displacement amount, and obtain a reference index value of the construction depth;

[0019] An evaluation module, configured to evaluate the construction depth of the area to be tested according to the evaluation index value and the reference index value.

[0020] In a third aspect, to solve the above technical problems, the present invention provides a dense contact type construction depth testing device, including:

[0021] An acquisition device, including a probe box, the probe box includes a probe board and the probes, the probes are installed on the probe board, and data of the area to be tested is acquired through the probes;

[0022] A driving and transmission device, configured to drive the probe board to move up and down and transmit the displacement amount of the probes;

[0023] A controller, configured to receive the displacement amount and send a control signal to the driving and transmission device; the controller includes the above-mentioned dense contact type construction depth testing system.

[0024] In an embodiment of the present invention, the acquisition device includes a plurality of legs, and each leg includes a plurality of cleaning air holes for cleaning the area to be tested.

[0025] In an embodiment of the present invention, the leg further includes a level adjusting device.

[0026] The above technical solutions of the present invention have the following beneficial effects compared with the prior art:

[0027] (1) For the dense contact type construction depth testing method, system and device of the present invention, by stopping the movement of the probe board when the probes reach the preset contraction condition, the actual construction depth of the road surface can be accurately captured, effectively reducing the measurement error and damage caused by excessive compression of the probes. In addition, a screening process is performed on the acquired displacement amount data to eliminate outliers, ensuring that the data used for construction depth calculation is both accurate and reliable, thereby significantly improving the credibility of the final measurement result.

[0028] (2) The automated measurement process of the present invention not only reduces the need for manual operation, improves the measurement efficiency, but also reduces the potential errors caused by human factors.

[0029] (3) The present invention allows users to preset different shrinkage conditions according to different test conditions and requirements, so as to adapt to the changing test environment and road surface conditions. In addition, the present invention not only simplifies the operation process, making the whole 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.

[0030] (4) The present invention integrates multiple cleaning air holes on each leg, solves the problem of manually cleaning the test area before the test, and cleans the test area automatically, releasing labor force. Description of the Drawings

[0031] In order to make the content of the present invention easier to be clearly understood, the following further describes the present invention in detail according to the specific embodiments of the present invention and in conjunction with the drawings, where:

[0032] Figure 1 It is a flowchart of a dense contact type texture depth test method in a preferred embodiment of the present invention;

[0033] Figure 2 It is a structure diagram of a probe plate and a probe in a preferred embodiment of the present invention;

[0034] Figure 3 It is a schematic diagram of a theoretical displacement reference plane in a preferred embodiment of the present invention;

[0035] Figure 4 It is a structure diagram of a dense contact type texture depth test device in a preferred embodiment of the present invention.

[0036] Explanation of the reference numerals in the drawings: 1. Probe plate; 2. Probe; 3. Probe box; 4. Driving and transmission device; 5. Controller; 6. Leg; 7. Leveling device; 8. Spirit level; 9. Cleaning air hole. Detailed Embodiments

[0037] The following further describes the present invention in conjunction with the 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.

[0038] In traditional road surface 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 material used can only be used once and cannot be reused. In addition, the manual sand spreading method lacks an effective recognition and elimination mechanism for processing abnormal data, is prone to large human errors, and lacks a unified actual operation standard.

[0039] 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 material into the measuring cylinder first and then transfer it to the sand spreading device, 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.

[0040] The vehicle-mounted laser method is favored for its high-efficiency testing ability. It can synchronously collect data such as road surface flatness and rutting, realizing automated operation, thus saving human resources. However, this method is not applicable to roads with severe damage, water accumulation, snow accumulation or mud coverage. The output test result is based on the average depth data within a certain distance along the test section, which is different from the average depth data based on a certain area in the sand spreading method. In addition, the vehicle-mounted laser method has high requirements for the driving conditions of the test vehicle. Before the test, a correlation model with the sand spreading method needs to be established to ensure that the correlation coefficient R value is not less than 0.97, and there are also high requirements for the acquisition response frequency of the laser sensor.

[0041] In view of the limitations of traditional road surface texture depth detection methods, the embodiments of the present invention propose a dense contact type texture depth testing method, system and device. The present invention uses a dense contact type acquisition device to obtain road surface texture depth information and transmits the data to the controller in real time. The controller can not only display the specific displacement of each measuring needle, but also perform comprehensive data statistics and analysis on the displacements of all measuring needles in combination with the actual working conditions such as the actual slope of the on-site road. On this basis, the system can flexibly select whether to eliminate abnormal values caused by road surface abnormalities such as holes and protrusions according to the actual situation, and then accurately calculate the road surface texture depth of the test point. The present invention effectively solves many problems existing in traditional texture depth detection methods, significantly improves the detection efficiency and accuracy, simplifies the operation process, reduces the dependence on equipment performance, and reduces the requirements for environmental conditions during the detection process.

[0042] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0043] Example 1: Refer to Figures 1 to 2 As shown, the embodiments of the present invention provide a dense contact type texture depth testing method, including but not limited to the following steps:

[0044] S1. Place the test device above the area to be tested. After leveling, move the measuring needle plate 1 of the test device downward; when the measuring needles 2 on the measuring needle plate 1 shrink to the preset condition, the measuring needle plate 1 stops moving downward, and obtain the displacement data of the measuring needles 2 in the current state;

[0045] S2. Determine the theoretical displacement reference plane, and calculate the first effective displacement according to the theoretical displacement reference plane and the displacement data.

[0046] S3. Screen and eliminate outliers from the first effective displacement to obtain the second effective displacement.

[0047] S4. Calculate the evaluation index value of the structural depth of the area to be tested according to the second effective displacement, and obtain the reference index value of the structural depth.

[0048] S5. Evaluate the structural depth of the area to be tested according to the evaluation index value and the reference index value.

[0049] An embodiment of the present invention provides a dense contact type structural depth test method. By stopping the movement of the probe plate when the probe 2 shrinks to a preset condition, the actual structural 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, a unified reference standard is provided for data processing, effectively eliminating errors caused by abnormal road surface conditions. Screening and eliminating outliers from the first effective displacement ensures that the data used to calculate the structural depth is accurate and reliable, thereby improving the credibility of the final result. In the evaluation step, the evaluation index value of the structural depth is calculated according to the second effective displacement, and the reference index value of the structural depth is obtained. This evaluation method based on actual measurement data and combined with statistical indicators can scientifically and comprehensively reflect the structural depth of the area to be tested. Therefore, the embodiment of the present invention allows different shrinkage 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 whole 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 structural depth data of a certain area of the road surface.

[0050] Specifically, in step S1, the preset condition is that one of the probes 2 on the probe plate 1 shrinks to the threshold value, or the number of probes 2 starting to shrink exceeds the preset ratio. In this embodiment, the preset ratio is set to 95%. Specifically, when a certain probe 2 shrinks to the threshold value, or when more than 95% of the probes 2 start to shrink, 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.

[0051] Further, referring to Figure 2 , in this embodiment, the area of the probe plate 1 is preferably 300 mm * 300 mm. 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.

[0052] Furthermore, the arrangement 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, and 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 stylus, and the second-section stylus to retract into the third-section stylus, 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.

[0053] 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.

[0054] 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.

[0055] Specifically, in the traditional manual sand spreading method, a fixed volume of sand is evenly spread on the surface of the section to be measured, so that the sand grains are embedded in the uneven gaps of the pavement. Subsequently, the diameters of the sand layer formed into a circle are measured in two perpendicular directions, and their 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. . Its calculation formula is as follows:

[0056] ;

[0057] Among them, represents the volume of the sand (25 cm 3 ), represents the average diameter of the flattened sand (mm); represents the pi.

[0058] 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.

[0059] 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 data. The methods to achieve this goal include the IQR method (interquartile range method), the Z-Score method, and a custom rejection method.

[0060] 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.

[0061] 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 the Z-Score greater than 3 are regarded as outliers and removed.

[0062] 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.

[0063] Specifically, in step S4, the evaluation index value of the texture depth is calculated according to the second effective displacement amount obtained in step S3, and the 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:

[0064] Step 1: Obtain the displacement data of the area to be tested through the measuring needle 2.

[0065] 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, the first effective displacement amount is calculated, and the mathematical expression of the first effective displacement amount is , where represents the total number of the measuring needles 2.

[0066] Further, referring to Figure 3 , the calculation formula for the effective displacement of each probe 2 is:

[0067] ;

[0068] Wherein, represents the effective displacement of the -th probe 2, represents the displacement data of the actual probe of the -th probe 2, represents the theoretical displacement reference plane data of the

[0069] 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 .

[0070] Specifically, the calculation formulas for the average value and standard deviation are respectively expressed as:

[0071] ;

[0072] ;

[0073] Wherein, represents the total number of second effective displacement data.

[0074] Further, the calculation formula for the coefficient of variation is expressed as:

[0075] .

[0076] 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.

[0077] 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 road surface standards or road design schemes in practical applications, the specific values of the above four intervals are not fixed.

[0078] 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.

[0079] 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, and thus can more accurately reflect the actual condition of the road.

[0080] The dense contact type texture depth test method provided by the embodiment of the present invention has significant advantages compared with the traditional method. First, aiming at the problems of high manual labor intensity and large human error in the process of laying sand in the manual sand laying method, this method releases labor force through automated operation and significantly improves the stability of the test results. Second, aiming at the problems of complex operation steps and the need for calibration before the test in the electric sand laying method, this method simplifies the test steps, making it simpler and more convenient, thus effectively improving the detection efficiency.

[0081] In addition, the present invention solves the problem that the sand used in the manual sand laying method and the electric sand laying 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 laying method and the electric sand laying 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 more reliable.

[0082] 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 measurement 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 usage 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.

[0083] In addition, the embodiment of the present invention solves the problem of signal interference of the vehicle-mounted laser method, and significantly improves the stability and accuracy of the test results. Aiming at the problem that a correlation relationship with the sand spreading method needs to be established before the vehicle-mounted laser method test, the method of the present invention reduces the input of preliminary work and makes the test results more direct and accurate.

[0084] Embodiment 2: Based on the same inventive concept, the present embodiment provides a dense contact type texture depth test system, and the principle of solving the problem 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.

[0085] The present embodiment provides a dense contact type texture depth test system, including:

[0086] A data acquisition module, configured to place the test device above the area to be tested, level it, and then move the probe plate 1 of the test device downward; when the probes 2 on the probe plate 1 contract to a preset condition, the probe plate 1 stops moving downward, and acquires the displacement data of the probes 2 in the current state;

[0087] A screening module, configured 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 outliers from the first effective displacement to obtain the second effective displacement;

[0088] A calculation module, configured to calculate the texture depth evaluation index value of the area to be tested according to the second effective displacement, and obtain the reference index value of the texture depth;

[0089] An evaluation module, configured to evaluate the texture depth of the area to be tested according to the evaluation index value and the reference index value.

[0090] Embodiment 3: Refer to Figure 4 As shown, the present embodiment provides a dense contact type texture depth test device, including:

[0091] An acquisition device, including a probe box 3, the probe box 3 includes a probe plate 1 and probes 2, the probes 2 are installed on the probe plate 1, and data of the area to be tested is acquired through the probes 2;

[0092] A driving and transmission device 4 is used to drive the probe board 1 to move up and down and transmit the displacement of the probe 2.

[0093] A controller 5 is used to receive the displacement and send a control signal to the driving and transmission device 4. The controller 5 includes the densely packed contact type structure depth testing system provided in Embodiment 2.

[0094] The densely packed contact type structure depth testing device provided in this embodiment is an integrated device, which reduces unnecessary accessory conditions such as physical wiring or wireless transmission, saving equipment space and equipment cost. High-density data acquisition is achieved through the probe board 1 and the probes 2 mounted 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, the efficiency, accuracy and reliability of the road surface structure depth test are significantly improved. In addition, this automated measurement process reduces manual operation, improves measurement efficiency, and reduces errors caused by human factors.

[0095] 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. Probes 2 are evenly installed on the board, and these probes 2 are densely arranged at a spacing 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 probe tip of the probe 2 can be 0.3mm or 0.5mm, with 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 above parameters such as the size of the probe board 1, the spacing 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.

[0096] 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 densely packed contact type structure depth testing device to a horizontal state. This design can eliminate measurement errors caused by equipment tilt, thereby improving the reliability of measurement results.

[0097] Furthermore, multiple cleaning air holes 9 are integrated on each leg 6, and the cleaning air holes 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.

[0098] 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, and then drive the probes 2 fixed on the probe board 1 to move up and down synchronously, so as to realize 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.

[0099] 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 whole 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 that effective test operations can be carried out without an external power source, thus improving the flexibility and adaptability of the test.

[0100] Specifically, the controller 5 integrates multiple functions such as display, storage, and analysis, and can accurately control the driving device according to instructions to realize 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 analyzing data, 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.

[0101] Furthermore, the controller 5 also includes an operation display, which can not only intuitively display the pavement texture depth of the test point, but also be used to set the theoretical displacement reference plane and define the boundary of outliers. The operation display provides a user-friendly interface, enabling users to easily adjust parameters and view results, thus 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.

[0102] 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 driving device of the drive transmission device 4 to precisely 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 electrically or wirelessly, 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 testing device, but also enhances the stability and durability of the device, enabling it to adapt to various pavement testing environments.

[0103] Furthermore, the specific operation steps of the dense contact type pavement texture depth testing device provided in this embodiment are as follows:

[0104] Step 1: Place the testing device directly above the area to be tested, and rotate the horizontal adjustment device 7 until the four spirit levels 8 on the testing device are all in a horizontal state.

[0105] 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 is no other interference factor when the probe 2 contacts the pavement, thereby guaranteeing the accuracy of the measurement.

[0106] Step 3: The controller 5 issues a control signal to control the driving device to drive the entire probe plate 1 to move downward. When any one probe 2 contracts to the set threshold, or when more than 95% of the probes 2 start to contract, the probe plate 1 stops moving downward. In this state, the displacement data of the probe 2 is collected.

[0107] 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.

[0108] Through precise horizontal adjustment, cleaning function, automated data acquisition and processing and other optimization measures in this embodiment, the measurement accuracy, operational convenience, data reliability and device stability are significantly improved. It is applicable to various complex working conditions and can effectively improve work efficiency and measurement quality.

[0109] 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.

[0110] The present application is described with reference to the flowcharts and / or block diagrams of methods, apparatuses (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 can be implemented by computer program instructions, and the combination of the flows and / or blocks in the flowchart and / or block diagram can also 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, so that the instructions executed by the processor of the computer or other programmable data processing devices generate means for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0111] 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, so that the instructions stored in the computer-readable memory generate a manufactured article including instruction means, and the instruction means implement the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0112] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one Figure 1 one flow or multiple flows and / or blocks Figure 1 one block or multiple blocks.

[0113] Obviously, the above embodiments are only 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 variations can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A method for testing the texture depth of a dense contact type, characterized in that, Including: S1. Place the testing device above the area to be tested. After leveling, move the probe board of the testing device downward. When the probes on the probe board contract to a preset condition, the probe board stops moving downward, and obtain the displacement data of the probes in the current state. Wherein, the preset condition is that one of the probes on the probe board contracts to a threshold value or the number of probes starting to contract exceeds a preset ratio. The probe includes a first-section probe, a second-section probe, and a third-section probe. The third-section probe is connected to the second-section probe, and the second-section probe is connected to the first-section probe. The length of the first-section probe is less than that of the second-section probe, and the length of the second-section probe is less than that of the third-section probe. The first-section probe is solid, and the second-section probe and the third-section probe are hollow. 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 structural depth of the area to be tested according to the second effective displacement, and obtain the reference index value of the structural depth. Wherein, the evaluation index value is the average value of the second effective displacement. The reference index values include the standard deviation and the 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 according to the second effective displacement; calculate the coefficient of variation according to the standard deviation. S5. Evaluate the structural depth of the area to be tested according to the evaluation index value and the reference index value. The method for screening and eliminating outliers in S3 includes: the interquartile range method and the Z-Score method.

2. The method for testing the depth of a densely contacted structure according to claim 1, wherein A device for implementing the dense-contact type structural depth testing method according to any one of claims 1 to 2, including:

3. A dense contact type texture depth testing system, characterized in that, A data acquisition module, configured to place the testing device above the area to be tested. After leveling, move the probe board of the testing device downward. When the probes on the probe board contract to a preset condition, the probe board stops moving downward, and obtain the displacement data of the probes in the current state; A screening module, configured to determine the theoretical displacement reference plane, and calculate the first effective displacement according to the theoretical displacement reference plane and the displacement data; screen and eliminate outliers from the first effective displacement to obtain the second effective displacement; A calculation module, configured to calculate the evaluation index value of the structural depth of the area to be tested according to the second effective displacement, and obtain the reference index value of the structural depth; An evaluation module, configured to evaluate the structural depth of the area to be tested according to the evaluation index value and the reference index value. Including:

4. A dense contact type texture depth testing device, characterized in that A collection device, including a probe box. The probe box includes a probe board and probes. The probes are installed on the probe board, and data is collected from the area to be tested through the probes; A driving and transmission device, configured to drive the probe board to move up and down and transmit the displacement of the probes. ​ A controller for receiving the displacement amount and sending a control signal to the drive transmission device; the controller includes a dense contact type structure depth testing system as described in claim 3.

5. The depth testing device with a dense contact structure according to claim 4, characterized in that, The acquisition device includes a plurality of legs, and each leg includes a plurality of cleaning air holes for cleaning the area to be tested.

6. The depth testing device with a dense contact structure according to claim 5, characterized in that, The leg further includes a leveling device.

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