In-situ calibration method, calibration device and system for pavement rutting instrument

Abstract

The invention discloses an in-situ calibration method, calibration device and system for a pavement rutting instrument, and belongs to the technical field of calibration. The method comprises the following steps: determining a target lifting height of each lifter in a group of lifters according to a target track; determining a sampling pulse signal according to the simulated vehicle speed of the laser rutting instrument test system to be calibrated; before measurement of the to-be-calibrated laser rutting instrument testing system, the lifters are driven to reach the target lifting heights according to the target lifting heights of the lifters so as to simulate cross section curves, and ruts corresponding to the cross section curves are consistent with target ruts; receiving a group of measured cross section measurement curves sent by a lifter; obtaining a track standard value according to the cross section measurement curve; receiving a rut measurement value obtained by the to-be-calibrated laser rut instrument test system based on the sampling pulse signal; and calibrating the laser rutting instrument test system according to the rutting standard value and the rutting measurement value. According to the scheme, the dynamic calibration process of the test system can be realized, and accurate and stable calibration parameters can be quickly obtained.

Description

Technical Field

[0001] The invention belongs to the field of calibration technology, and in particular relates to a road rutting in-situ calibration method, a calibration device and a system. Background Art

[0002] Road rutting refers to the permanent deformation of the asphalt pavement structure under the influence of high temperature or channelized traffic. The formation of rutting is mainly due to the further compaction and extrusion of the asphalt surface layer under the action of vehicle load, which causes the wheel track to sink and the two sides to bulge, forming crests and troughs. The height difference between the crests and troughs is the rutting depth. Rutting detection can be divided into the following three stages: manual detection stage, mechanized detection stage, and automated detection stage.

[0003] During the manual inspection stage, the instruments required for manual inspection mainly include cross-section rulers and levels. Place the cross-section ruler on the measuring section, place the two ends of the support on both sides of the measuring lane, and use a ruler to measure the distance between the rod and the bottom. This distance is the rutting depth. Measure once every 20 cm, accurate to 1 mm, and multiple points need to be measured at the same time. Although manual inspection has simple equipment and concise methods, it is inefficient, time-consuming and labor-intensive, and sampling inspection is only performed in a few cases.

[0004] In the mechanized detection stage, mechanized detection generally uses a pavement cross section meter. The pavement cross section meter is placed on the section to be measured, so that the center line of the road is perpendicular to it, and the end legs are placed on both sides of the measurement lane, and the measurement pile number is recorded. Adjust the height of the legs to make them equal. Move the pavement cross section meter from one side of the lane to the other, and record the section status. The pavement cross section meter is a further improvement on manual detection, and the efficiency has been improved. However, due to the continuous increase in highway mileage, the detection efficiency cannot meet the requirements of my country's highway high-speed construction.

[0005] In the automated detection stage, current automated rutting detection equipment is mainly divided into two categories. The first category is equipment that uses laser ranging technology to directly measure the cross-sectional elevation of the road surface and calculate the road rutting depth (Rut). It is mainly composed of laser ranging sensors, longitudinal ranging sensors, and computer processing systems. The second category is equipment that uses laser and image acquisition technology to calculate the road rutting depth by deforming the laser line projected onto the road surface. It is mainly composed of laser light sources, digital image acquisition devices, longitudinal ranging sensors, and computer digital image processing systems.

[0006] With the popularization and application of vehicle-mounted pavement testing equipment, the accuracy and stability of the measurement data of such equipment are increasingly concerned. The pavement rutting calibration device uses a cross-section of the pavement with standard test blocks as an auxiliary measuring device when measuring the standard. Through multiple single-point measurements with a precision level, the elevation sequence of the pavement cross section is obtained to reproduce the pavement rutting value.

[0007] The test road for the verification test can choose the standard test road method and the section test method. Among them, the standard test road method is a method to change the flatness of the test line by arranging test blocks of different thicknesses and numbers at different positions along the cross section of the pavement on the platform road according to the Rut value of the section required for the verification project. The test blocks in the standard test road method are set up at intervals of 10m on the road, and the above 7 typical rutting pavement models must be covered, with the number of cross sections not less than 7. The section test method is to select three test sections with different rutting levels on the actual operating road. The Rut distribution ranges are 0mm~10mm, 20mm~30mm and 40mm~50mm, respectively, and the length of each test road is not less than 300m. Regardless of the standard test road method or the section test method, it is first necessary to mark the points along the cross section of the test road at intervals of 250mm, and then use a precision level to measure the cross-section elevation data of each section of the test road. Then calculate the rutting value of each section according to the rutting calculation method. The test system is tested at a certain speed on the test road, and the output value of the test system is compared with the standard value of the test section, thereby realizing the metrological verification of the test system.

[0008] In the process of implementing the calibration method, it was found that: 1) Because the road needs to be closed for testing, management and coordination are very difficult, and it is difficult to find a suitable test road outdoors; 2) A level instrument is required for testing, which is slow, inefficient, time-consuming and labor-intensive; 3) Due to the influence of weather, in the event of sudden weather changes, the on-site calibration work will have to be interrupted, resulting in construction delays; 4) The test block is not tightly fitted to the road surface, so the test block may be tilted, resulting in a deviation between the actual elevation curve and the theoretical calculated value. Summary of the invention

[0009] In order to solve the above problems, the present invention provides a road rutting in-situ calibration method, calibration device and system.

[0010] On one hand, the present invention provides an in-situ calibration method for a road surface rutting instrument, which comprises:

[0011] Determine the target lifting height of each lifter in a group of lifters according to the target rut; determine the sampling pulse signal according to the simulated vehicle speed of the laser tracker test system to be calibrated; before the laser tracker test system to be calibrated measures, drive the height of the corresponding lifter to the target lifting height according to the target lifting height of each lifter to simulate a cross-sectional curve, and the rut corresponding to the cross-sectional curve is consistent with the target rut; receive the measured cross-sectional measurement curve sent by the lifter; obtain the rut standard value according to the cross-sectional measurement curve; receive the rut measurement value obtained by the laser tracker test system to be calibrated based on the sampling pulse signal, and when the laser tracker test system measures, the measurement position of the laser tracker test system corresponds to the group of lifters; calibrate the laser tracker test system according to the rut standard value and the rut measurement value.

[0012] In the method as described above, optionally, determining a target lifting height of each lifter in a group of lifters according to a target rut comprises:

[0013] A target lifting height combination of each lifter in the group of lifters is determined according to the target rutting range; and a target lifting height of each lifter in the group of lifters is determined according to the target lifting height combination.

[0014] Another aspect of the present invention provides a road rutting in-situ calibration device, comprising:

[0015] A target lifting height determination module is used to determine the target lifting height of each lifter in a group of lifters according to the target rut; a pulse signal determination module is used to determine the sampling pulse signal according to the simulated vehicle speed of the laser flatness meter test system to be calibrated; a height driving module is used to drive the height of the corresponding lifter to the target lifting height according to the target lifting height of each lifter to simulate a cross-sectional curve before the laser track meter test system to be calibrated measures, and the rut corresponding to the cross-sectional curve is consistent with the target rut; a cross-sectional curve receiving module is used to receive the measured cross-sectional measurement curve sent by the lifter; a rut standard value obtaining module is used to obtain the rut standard value according to the cross-sectional measurement curve; a rut measurement value receiving module is used to receive the rut measurement value obtained by the laser track meter test system to be calibrated based on the sampling pulse signal, and when the laser track meter test system measures, the measurement position of the laser track meter test system corresponds to the group of lifters; a rut calibration module is used to calibrate the laser track meter test system according to the rut standard value and the rut measurement value.

[0016] In the device as described above, optionally, the target lifting height determination module includes:

[0017] A height combination determining unit is used to determine a target lifting height combination of each lifter in the group of lifters according to the target rutting range; a target lifting height determining unit is used to determine a target lifting height of each lifter in the group of lifters according to the target lifting height combination.

[0018] Another aspect of the present invention provides a road rutting in-situ calibration system, comprising:

[0019] A calibration platform for carrying a laser tracker test system to be calibrated; a group of lifters having multiple lifters for simulating cross-sectional curves, located below a data acquisition sensor of the laser tracker test system; and a calibration device, which is the above-mentioned road rutting in-situ calibration device.

[0020] In the system as described above, optionally, the inspection platform comprises: a platform body and a turbulence generator;

[0021] The bump generator is used to make the laser tracker test system placed on the platform body bump to simulate road bumps during driving; the data acquisition sensor is a cross-sectional sensor, and the cross-sectional sensor includes: a laser ranging sensor and an acceleration sensor.

[0022] In the system as described above, optionally, the lifter is a lifting platform structure, and the upper end surface of the lifting platform is located below the cross-section sensor of the laser tracker testing system.

[0023] Another aspect of the present invention provides an electronic device, comprising: a processor and a memory for storing executable instructions of the processor; wherein the processor is configured to execute the above-mentioned road rutting in-situ calibration method.

[0024] On the other hand, the present invention provides a computer-readable storage medium, which stores at least one instruction, at least one program, code set or instruction set, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the above-mentioned road rutting in-situ calibration method.

[0025] In yet another aspect, the present invention provides a computer program product comprising instructions, which, when executed on a computer, enables the computer to execute the steps in the above method and various possible implementations.

[0026] The technical solution provided by the embodiment of the present invention has the following beneficial effects:

[0027] 1) The road rutting in-situ calibration device is used to directly calibrate the road rutting output results of the test system, so that the calibration process does not rely on the standard test section, and the whole machine measurement traceability without site constraints is realized. Compared with the standard test road method, this method saves a huge amount of cost for the construction of the standard test road, and at the same time reduces the difficulty of calibrating the wheel rutting instrument test system, and also makes the calibration work of such equipment easier to promote and popularize;

[0028] 2) The output sampling pulse signal (which can be output by a standard signal generator) and the cross-section elevation simulation device (i.e., the lifter) are used to solve the problem of rapid calibration of the test system, and accurate and stable calibration parameters can be quickly obtained;

[0029] 3) The test system to be tested can be made to vibrate up and down, left and right, simulating the bumps in actual driving, so that the state of the test system when driving on the actual road can be simulated, ensuring that the calibration process is closer to the actual working conditions and realizing the dynamic calibration process of the test system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic flow chart of a road rutting in-situ calibration method provided by an embodiment of the present invention;

[0031] Figure 2 A schematic structural diagram of a road rutting in-situ calibration device provided by an embodiment of the present invention;

[0032] Figure 3 A schematic structural diagram of a road rutting in-situ calibration system provided by an embodiment of the present invention;

[0033] Figure 4 A schematic diagram of a cross-sectional curve collected by an in-situ calibration device for road rutting provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0035] See also Figure 1 The embodiment of the present invention provides a method for in-situ calibration of road rutting, which comprises the following steps:

[0036] Step 101, determining a target lifting height of each lifter in a group of lifters according to a target rut.

[0037] A group of lifters includes a plurality of lifters, and the plurality of lifters are arranged in sequence along the cross section. The lifting height of each lifter is independently controlled. When each lifter is lifted to its own target lifting height, a cross-sectional curve is formed. After the target rut is determined, it is used as the rut to be simulated. Then, the lifting height of each lifter in a group of lifters is determined according to the target rut. This embodiment does not limit the specific process of determining each lifter. In specific implementation, it can be: based on historical data, determine the first range of each lifting height, and then calculate the rut. If the size of the rut and the target rut does not meet the requirements, adjust the height of the lifter until the requirements are met. Alternatively, if the rut and the target rut are within the same rut range, the rut is used as the target rut to replace the initial target rut. The target rut range can be determined according to the relevant calibration test requirements, and this embodiment does not limit its specific numerical range.

[0038] In order to better improve the calibration performance of the present method, determining the target lifting height of each lifter in a group of lifters according to the target rut includes: determining a target lifting height combination of each lifter in a group of lifters according to the target rut range; determining the target lifting height of each lifter in a group of lifters according to the target lifting height combination. Specifically, the target rut is determined according to the target rut range, and the lifting height of each lifter in a group of lifters is determined according to the target rut. According to the aforementioned method, the target rut range is traversed to determine the lifting height combination of each lifter in a group of lifters. A lifting height is selected from the lifting height combination as the target lifting height, and the selection method can be a random selection method.

[0039] Step 102, determining a sampling pulse signal according to a simulated vehicle speed of the laser wheel tracker test system to be calibrated.

[0040] This method uses a sampling pulse signal as an excitation source to realize the distance of the test system corresponding to this method (i.e., the road surface roughness in-situ calibration system described below) in the driving direction. By setting the sampling pulse signal (or roughness distance signal), the number of data collected on a certain road section can be determined.

[0041] The simulated vehicle speed can be 50km / h, 60km / h, 80km / h, or 100km / h. The simulated vehicle speed range used by this method is wide and meets the requirements.

[0042] Step 103, before the laser tracker test system to be calibrated measures, the height of the corresponding lifter is driven to the target lift height according to the target lift height of each lifter to simulate the cross-sectional curve, and the rut corresponding to the cross-sectional curve is consistent with the target rut.

[0043] After the target lifting height of each lifter is obtained through the above steps, the lifter is driven up and down according to the target lifting height of each lifter, so that a group of lifters can realize the simulated cross-sectional curve, and the rut corresponding to the cross-sectional curve is consistent with the target rut, or the rut corresponding to the cross-sectional curve is within the target rut range.

[0044] Step 104: receiving a group of measured cross-sectional measurement curves sent by the lifters.

[0045] After a group of lifters are lifted and lowered according to the target lifting height, a height value will be generated. By sampling the height value, a cross-sectional curve will be obtained, which is called a cross-sectional measurement curve.

[0046] Step 105, obtaining the rutting standard value according to the cross-section measurement curve.

[0047] Regarding how to obtain the standard rutting value based on the cross-sectional measurement curve, reference may be made to the relevant methods for rutting calculation in the prior art, which will not be described in detail here.

[0048] Step 106, receiving the rutting measurement value obtained by the laser rutting instrument test system to be calibrated based on the sampling pulse signal. When the laser rutting instrument test system is measuring, the measuring position of the laser rutting instrument test system corresponds to a set of lifters.

[0049] The laser wheel tracker test system to be calibrated obtains the wheel track measurement value based on the sampled pulse signal. The laser wheel tracker test system can be the two types of automated testing equipment mentioned above, Figure 3 The first type of automated testing equipment is shown schematically in FIG.

[0050] On the automated testing equipment, a distance sensor is provided, which is generally composed of a photoelectric encoder, and is mainly used to record the distance traveled and the real-time speed of the vehicle. When applied, the photoelectric encoder in the distance sensor is first calibrated, and the total number of pulses (for example, 100,000) generated by the pulse encoder within a certain distance (for example, 100m) in the driving direction is counted, and the longitudinal displacement length (1mm / pulse) corresponding to one pulse is calculated, that is, the pulse coefficient. In actual testing, the distance traveled by the vehicle in the driving direction can be calculated by counting the current number of pulses, and the current speed of the vehicle can be calculated by calculating the period of the pulse. When the load-bearing vehicle travels at a certain test speed, the cross-sectional sensor measures its relative elevation to the road surface, and then the rutting of the road surface is obtained based on this.

[0051] Since this method does not use the actual road section, the load-bearing vehicle does not need to travel forward. The sampling pulse signal generated by the set signal generator matches the distance traveled by the load-bearing vehicle. The signal generator is set in the road rutting in-situ calibration device. Before the laser wheel tracker test system to be calibrated measures, a set of lifters has been lifted to the target lifting height. Although multiple data will be collected during the measurement process, the collected data are basically consistent. The sampling pulse signal can also be used to match the cross-sectional curve of a set of lifters collected by the position feedback unit with the cross-sectional curve collected by the laser wheel tracker test system to be calibrated.

[0052] Step 107, calibrating the laser wheel tracker test system according to the wheel track standard value and the wheel track measurement value.

[0053] The rutting standard value Rut is calculated by recording the elevation data of each lifter in a group of lifters in the cross section. 标 , and the corresponding rutting measurement value Rut output by the laser rutting instrument test system to be calibrated 测 Perform comparative analysis, calculate the relative error of road rutting, and complete the calibration of the test system. The relative error calculation method can be:

[0054]

[0055] Among them: Rut 测 ——Rutting depth value measured by the laser rutting instrument test system (mm);

[0056] Rut 标 ——Rutting depth value set for the simulated section (mm);

[0057] R——Relative error of rutting depth (%).

[0058] It should be noted that the relative error of rutting for Class I laser wheel tracker is ≤10%, and the relative error of rutting for Class II laser wheel tracker is ≤15%. If the relative error is greater than 15%, the test result does not meet the requirements.

[0059] The laser wheel tracker test system to be calibrated simulates a vehicle to test at a certain speed through the input sampling pulse signal. The cross-sectional sensor collects the cross-sectional curve information generated by a set of lifters. Combined with the distance information generated by the sampling pulse signal, the laser wheel tracker test system can output the cross-sectional curve (or cross-sectional elevation curve) and the wheel track measurement value Rut in the road section. 测 .

[0060] In other embodiments, the laser rutting instrument test system is bumped to simulate the bumps of the road during driving. At this time, the laser sensor in the cross-sectional sensor will also collect the elevation information caused by the bumps of the vehicle, and the acceleration sensor in the cross-sectional sensor records the vertical acceleration signal caused by the bumps at the laser sensor. The elevation information measured by the laser can be corrected by integral calculation, and finally the cross-sectional elevation information simulated by the lifter is obtained. In combination with the distance information generated by the sampling pulse signal, the laser flatness instrument test system can output the cross-sectional elevation curve and rutting measurement value Rut in the road section. 测 .

[0061] See also Figure 2 An embodiment of the present invention provides an in-situ calibration device for road surface flatness, which is used to execute the in-situ calibration method for road surface flatness of the above embodiment, and includes: a target lifting height determination module 201, a pulse signal determination module 202, a height driving module 203, a cross-sectional curve receiving module 204, a rutting standard value obtaining module 205, a rutting measurement value receiving module 206 and a rutting calibration module 207.

[0062] Among them, the target lifting height determination module 201 is used to determine the target lifting height of each lifter in a group of lifters according to the target rut. The pulse signal determination module 202 is used to determine the sampling pulse signal according to the simulated vehicle speed of the laser flatness meter test system to be calibrated. The height driving module 203 is used to drive the height of the corresponding lifter to the target lifting height according to the target lifting height of each lifter to simulate the cross-sectional curve before the laser rutting meter test system to be calibrated measures, and the rut corresponding to the cross-sectional curve is consistent with the target rut. The cross-sectional curve receiving module 204 is used to receive the measured cross-sectional measurement curve sent by the lifter. The rutting standard value obtaining module 205 is used to obtain the rutting standard value according to the cross-sectional measurement curve. The rutting measurement value receiving module 206 is used to receive the rutting measurement value obtained by the laser rutting meter test system to be calibrated based on the sampling pulse signal. When the laser rutting meter test system measures, the measurement position of the laser rutting meter test system corresponds to a group of lifters. The rutting calibration module 207 is used to calibrate the laser rutting meter test system according to the rutting standard value and the rutting measurement value.

[0063] Optionally, the target lifting height determination module 201 includes: a height combination determination unit and a target lifting height determination unit. The height combination determination unit is used to determine a target lifting height combination of each lifter in a group of lifters according to a target rutting range. The target lifting height determination unit is used to determine a target lifting height of each lifter in a group of lifters according to the target lifting height combination.

[0064] It should be noted that: the road rutting in-situ calibration device provided in the above embodiment only uses the division of the above functional modules as an example when calibrating the laser flatness meter test system. In actual applications, the above functions can be assigned to different functional modules as needed, that is, the internal structure of the device can be divided into different functional modules to complete all or part of the functions described above. In addition, the road rutting in-situ calibration device provided in the above embodiment and the road rutting in-situ calibration method embodiment belong to the same concept. The specific implementation process is detailed in the method embodiment, and will not be repeated here.

[0065] See also Figure 3 , an embodiment of the present invention provides an in-situ calibration system for road rutting, which includes: a calibration platform, a group of lifters and a calibration device 5. Among them, the calibration platform is used to carry the laser rutting instrument test system 6 to be calibrated. Each lifter in a group of lifters is used to simulate the corresponding value in the cross-sectional curve, and is located below the cross-sectional sensor of the laser flatness meter test system 6. The number of lifters 40 in a group of lifters (or lifter units) 4 can be 60, or other values, which are specifically set according to the actual calibration situation. The calibration device 5 is the aforementioned in-situ calibration device for road rutting.

[0066] The inspection platform has: a platform body and a bump generator. The platform body is used to carry the laser tracker test system 6 to be calibrated. The bump generator is used to make the laser tracker test system 6 placed on the platform body simulate the bumps of the road during driving. This embodiment does not limit the specific structure of the bump generator, and it is sufficient to make the laser tracker test system generate bump vibration. The cross-sectional sensor includes: a laser ranging sensor and an acceleration sensor.

[0067] A set of lifters is used to simulate the cross-sectional curve. It can be a lift structure. The power parts of the lifters drive the lift body 41 to move up and down, so as to move to the target lifting height. In order to improve the lifting accuracy of the lifter, the system is also provided with a damper 42, which is used to keep the lifter in the current position and prevent the position from changing in the natural state. Figure 3 In the figure, a multi-point common beam wheel tracker is taken as an example, and 13 cross-section sensors are set up.

[0068] In this embodiment, the vertical range of the lifter is 500mm. The position feedback unit 41 is used to collect the lifting height of the lifter. It adopts LVDT (Linear Variable Displacement Transducer) sensor with a linear error of ±0.25%. The output frequency range of the pulse signal generator (or signal generator) is 1Hz to 10MHz. The bump generator can make the 3t load-bearing vehicle produce a preset bump vibration. The bump generator has a vibration curve for simulating the vibration of the vehicle under actual road conditions.

[0069] When in use, move the laser tracker test system to be calibrated to the calibration platform, place the limit blocks, and there are limit blocks in the front and rear directions. Adjust the bump generator at the bottom of the calibration platform so that it is located below the front and rear axles of the carrier vehicle. Adjust the position of the lifter so that the laser point of the laser of the laser tracker test system falls on the top surface of the lifter, such as the center position, and connect the sampling pulse signal (distance signal) of the road rutting in-situ calibration device to the laser tracker test system. The sampling pulse signal is used as the excitation source of the distance signal of the laser tracker test system to simulate the laser tracker test system to collect data at a normal driving speed. The calibration platform drives the laser tracker test system to bump together, simulating the bumps of the road surface during normal driving. The lifter is located outside the calibration platform and does not bump with it.

[0070] During the test, the bump generator is started to simulate the up and down and left and right bumps generated by the laser wheel tracker test system when driving on the actual road, realizing dynamic testing. There are four bump generators in total, one under each wheel.

[0071] The test system to be tested simulates the vehicle to be tested at a certain speed through the input pulse signal, and outputs the cross-sectional elevation curve and rutting value Rut within the section length by collecting the cross-sectional elevation information generated by a set of lifters. 测 The lifting height of each lifter in a group of lifters will also be collected by the position feedback unit, that is, the elevation value of the lifter is recorded by the position feedback unit, and the standard Rut of the cross section of a group of lifters is calculated through the elevation value of the cross section. 标 , and the corresponding measured value Rut output by the test system 测 Perform comparative analysis, calculate relative errors, and complete the calibration of the test system. In actual calibration, one cross-sectional curve corresponds to the lifting height of each lifter in a group of lifters. Multiple cross-sectional curves can be set, such as generating various cross-sectional curves according to the rutting shape in the test requirements. Figure 4 , schematic diagrams of multiple groups of cross-sectional curves.

[0072] Standard value of flat rutting Rut 标 The calculation process is explained below.

[0073] After the in-situ calibration device for pavement rutting is started, the position feedback unit is first scanned to confirm the connection status of the device and display a prompt message. If there is no connection, a corresponding error message is given. Then the relevant parameters of the lifter in the calibration device need to be set, mainly the number and shape of the cross-sectional curve groups. Next, the number of groups of pulse signals and the number of pulse signals in each group need to be set. After the calibration device is set up, after the calibration test system is ready, the data can be collected. The pulse signal is used to trigger the collection of the cross-sectional elevation signal of the lifter to obtain the simulated pavement cross-sectional elevation curve, and finally the pavement rutting value Rut of this section is calculated.

[0074] An embodiment of the present invention provides an electronic device, which includes: a memory and a processor. The processor is connected to the memory and is configured to execute the above-mentioned road rutting in-situ calibration method based on the instructions stored in the memory. The number of processors can be one or more, and the processor can be single-core or multi-core. The memory may include non-permanent memory in a computer-readable medium, random access memory (RAM) and / or non-volatile memory, such as a read-only memory (ROM) or flash RAM, and the memory includes at least one memory chip. The memory can be an example of the following computer-readable medium.

[0075] An embodiment of the present invention provides a computer-readable storage medium, on which at least one instruction, at least one program, code set or instruction set is stored, and the at least one instruction, at least one program, code set or instruction set is loaded and executed by a processor to implement the above-mentioned road rutting in-situ calibration method. Computer-readable storage media include: permanent and non-permanent, removable and non-removable media can implement information storage by any method or technology. Information can be a computer-readable instruction, a data structure, a module of a program or other data. Examples of computer storage media include, but are not limited to: phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk-read-only memory (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassette, disk storage or other magnetic storage device or any other non-transmission medium, which can be used to store information that can be accessed by a computing device.

[0076] An embodiment of the present invention provides a computer program product including instructions, which, when executed on a computer, enables the computer to execute various steps in the road rutting in-situ calibration method and various possible implementations.

[0077] It is known from common technical knowledge that the present invention can be implemented by other embodiments that do not deviate from its spirit or essential features. Therefore, the above disclosed embodiments are only illustrative in all respects and are not exclusive. All changes within the scope of the present invention or within the scope equivalent to the present invention are included in the present invention.

Claims

1. A method for in-situ calibration of a road surface rutting instrument, characterized in that: The method comprises: determining a target lifting height of each lifter in a group of lifters according to the target rutting; Determine a sampling pulse signal according to a simulated vehicle speed of a laser wheel tracker test system to be calibrated; Before the laser wheel tracker test system to be calibrated measures, the height of the corresponding lifter is driven to the target lift height according to the target lift height of each lifter to simulate a cross-sectional curve, and the rut corresponding to the cross-sectional curve is consistent with the target rut; receiving the measured cross-sectional measurement curve sent by the group of lifters; Obtaining a rutting standard value according to the cross-section measurement curve; Receiving a rutting measurement value obtained by a laser rutting instrument test system to be calibrated based on the sampling pulse signal, wherein when the laser rutting instrument test system is measuring, a measuring position of the laser rutting instrument test system corresponds to the set of lifters; The laser rutting instrument test system is calibrated according to the rutting standard value and the rutting measurement value.

2. The method according to claim 1, characterized in that Determining the target lifting height of each lifter in a group of lifters according to the target rut comprises: Determining a target lifting height combination of each lifter in the group of lifters according to the target rutting range; The target lifting height of each lifter in the group of lifters is determined according to the target lifting height combination.

3. A road rutting in-situ calibration device, characterized in that: The device comprises: A target lifting height determination module, for determining a target lifting height of each lifter in a group of lifters according to a target rut; A pulse signal determination module, used to determine a sampling pulse signal according to a simulated vehicle speed of a laser roughness meter test system to be calibrated; A height driving module, used for driving the height of the corresponding lifter to the target lifting height of each lifter to simulate a cross-sectional curve before the laser wheel tracker test system to be calibrated measures, wherein the wheel track corresponding to the cross-sectional curve is consistent with the target wheel track; A cross-sectional curve receiving module, used for receiving the measured cross-sectional measurement curve sent by the lifter; A rutting standard value obtaining module, used for obtaining the rutting standard value according to the cross-section measurement curve; A rutting measurement value receiving module, used for receiving the rutting measurement value obtained by the laser rutting instrument test system to be calibrated based on the sampling pulse signal, when the laser rutting instrument test system is measuring, the measuring position of the laser rutting instrument test system corresponds to the set of lifters; The rutting calibration module is used to calibrate the laser rutting instrument test system according to the rutting standard value and the rutting measurement value.

4. The device according to claim 3, characterized in that The target lifting height determination module comprises: a height combination determining unit, for determining a target lifting height combination of each lifter in the group of lifters according to the target rutting range; The target lifting height determination unit is used to determine the target lifting height of each lifter in the group of lifters according to the target lifting height combination.

5. A road rutting in-situ calibration system, characterized in that: The system comprises: A calibration platform, used to carry the laser tracker test system to be calibrated; A set of lifters having a plurality of lifters for simulating a cross-sectional curve, located below a cross-sectional acquisition sensor of the laser tracker test system; and The calibration device is the road rutting in-situ calibration device according to any one of claims 3-4.

6. The system according to claim 5, characterized in that The inspection platform comprises: a platform body and a turbulence generator; The bump generator is used to make the laser wheel tracker test system placed on the platform body bump to simulate the bump of the road surface during driving; The cross-section sensor includes: a laser distance sensor and an acceleration sensor.

7. The system according to claim 5, characterized in that The lifter is a lifting platform structure, and the upper end surface of the lifting platform is located below the cross-section sensor of the laser tracker test system.

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