Tire wear measuring method and system, readable storage medium and computer

Abstract

The invention provides a tire wear measurement method and system, a readable storage medium and a computer. The method comprises the following steps: processing a road test result of a to-be-measured vehicle based on a preset road test standard to obtain road test data; according to radial acceleration sampling data in the road test data, calculating grounding time of a tire inner measuring point of the to-be-measured vehicle and a tire rolling period of the to-be-measured vehicle; calculating the vertical load of the tire of the vehicle to be measured according to the grounding time and the tire rolling period, and performing feature extraction on the radial acceleration sampling data to obtain feature data; the friction loss rate of the tires of the to-be-tested vehicle is calculated according to the friction coefficient of the tires of the to-be-tested vehicle and the road test data, and the actual abrasion loss of the tires of the to-be-tested vehicle is calculated according to the friction loss rate and the tire rolling period; and inputting the feature data and the vertical load into the wear prediction model to obtain a wear prediction amount, and comparing the wear prediction amount with the actual wear amount to output a corresponding comparison result.

Description

Technical Field

[0001] The present invention relates to the field of data processing technology, and in particular to a tire wear measurement method, system, readable storage medium and computer. Background Art

[0002] With the rapid development of science and technology and the improvement of people's living standards, vehicles have become an indispensable means of transportation in people's lives and even travel.

[0003] Tires are the displacement parts of vehicles that come into contact with the road. When the vehicle is in various working conditions, the tires generate elastic force by contacting the road surface, thereby supporting the weight of the vehicle and the load and reducing the impact of the road surface. Tire wear measurement is an important factor in vehicle detection, which determines whether the vehicle will have a tire blowout during driving. At present, tire wear measurement is achieved by real-time measurement of tire pressure, tire temperature and visual inspection. Since the vertical load of the tire is also an important factor in the safe driving state of the vehicle, it is also one of the important indicators of tire wear. Monitoring tire pressure, tire temperature and visual inspection cannot achieve real-time monitoring, nor can the vertical load factor of the tire be considered in tire wear measurement. Summary of the invention

[0004] Based on this, an object of the present invention is to provide a tire wear measurement method, system, readable storage medium and computer to at least solve the deficiencies in the above-mentioned technology.

[0005] The present invention provides a tire wear measurement method, comprising: Performing a road test on the vehicle to be tested, and processing the result of the road test based on a preset road test standard to obtain road test data of the vehicle to be tested; Parsing the radial acceleration sampling data in the road test data, and calculating the contact time of the inner measuring point of the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data; Calculating the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period, and performing feature extraction on the radial acceleration sampling data to obtain corresponding feature data; Obtaining the friction coefficient of the tire of the vehicle to be tested, and calculating the friction loss rate of the tire of the vehicle to be tested according to the friction coefficient and the road test data, and calculating the actual wear amount of the tire of the vehicle to be tested according to the friction loss rate and the tire rolling cycle; A wear prediction model is constructed, and the characteristic data and the vertical load are input into the wear prediction model to obtain a wear prediction amount, and the wear prediction amount is compared with the actual wear amount to output a corresponding comparison result.

[0006] Further, the step of performing a road test on the vehicle to be tested and processing the result of the road test based on a preset road test standard to obtain the road test data of the vehicle to be tested includes: Defining the execution conditions of the road test experiment, and marking two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire; A road test is performed on the vehicle to be tested based on the two coordinate points, the sensor position and the execution conditions, and coordinate conversion and data processing are performed on the collected road test data to obtain the road test data of the vehicle to be tested.

[0007] Furthermore, an acceleration sensor is installed at a measuring point inside the tire of the vehicle to be tested, and the step of calculating the contact time of the measuring point inside the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data includes: Calculating the time that the acceleration sensor passes within the contact area corresponding to the inner point of the tire of the vehicle to be tested based on the sampling frequency of the acceleration sensor and the radial acceleration sampling data; The tire rolling period of the vehicle to be tested is calculated according to the elapsed time and the data sampling point positions of the tire of the vehicle to be tested within the free rolling period.

[0008] Furthermore, the calculation formula for the time that the acceleration sensor spends in the contact area corresponding to the inner point of the tire of the vehicle to be tested is: ; In the formula, Indicates the peak point in the radial acceleration sampling data The corresponding data sampling point position, Indicates the front peak point in the radial acceleration sampling data The corresponding data sampling point position, represents the sampling frequency of the acceleration sensor, Indicates the compensation coefficient of the acceleration sensor; The calculation formula of the tire rolling period of the vehicle to be tested is: ; In the formula, , They represent the first , No. The data sampling point position corresponding to the previous peak point in the cycle, , They represent the first , No. The data sampling point position corresponding to the last peak point in the cycle, Represents the rolling period coefficient, which is a constant.

[0009] Furthermore, the step of calculating the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period includes: Obtaining the tire width of the vehicle to be tested and its corresponding tire diameter, and calculating the tire rolling radius of the vehicle to be tested according to the tire width and the tire diameter; Calculating the tire contact length of the vehicle to be tested according to the tire rolling radius, the tire rolling period and the contact time; The tire pressure coefficient and rolling speed coefficient of the tire of the vehicle to be tested are constructed, and the vertical load of the tire of the vehicle to be tested is calculated according to the tire pressure coefficient, the rolling speed coefficient, the contact length of the tire of the vehicle to be tested, and the speed of the vehicle to be tested in the road test data.

[0010] Furthermore, the calculation formula of the vertical load of the tire of the vehicle to be tested is: ; ; In the formula, Indicates the tire contact length of the vehicle to be tested. Indicates the rolling radius of the tire of the vehicle to be tested, Indicates the tire pressure coefficient of the vehicle to be tested. Indicates the rolling speed coefficient of the tire of the vehicle to be tested, Indicates the speed of the vehicle to be tested.

[0011] The present invention also provides a tire wear measurement system, comprising: A road test module, used to perform a road test on the vehicle to be tested, and process the result of the road test based on a preset road test standard to obtain road test data of the vehicle to be tested; A data calculation module, used to parse the radial acceleration sampling data in the road test data, and calculate the contact time of the inner measuring point of the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data; A feature extraction module, used to calculate the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period, and perform feature extraction on the radial acceleration sampling data to obtain corresponding feature data; a wear amount calculation module, used to obtain the friction coefficient of the tire of the vehicle to be tested, and calculate the friction loss rate of the tire of the vehicle to be tested according to the friction coefficient and the road test data, and calculate the actual wear amount of the tire of the vehicle to be tested according to the friction loss rate and the tire rolling period; The wear comparison module is used to construct a wear prediction model, and input the characteristic data and the vertical load into the wear prediction model to obtain a wear prediction amount, and compare the wear prediction amount with the actual wear amount to output a corresponding comparison result.

[0012] Furthermore, the road test module includes: A condition definition unit, used to define the execution conditions of the road test experiment, and mark two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire; The road test unit is used to perform a road test on the vehicle to be tested based on the two coordinate points, the sensor position and the execution conditions, and to perform coordinate conversion and data processing on the collected road test data to obtain the road test data of the vehicle to be tested.

[0013] Furthermore, an acceleration sensor is installed at a measuring point inside the tire of the vehicle to be tested, and the data calculation module includes: A time calculation unit, configured to calculate the time that the acceleration sensor passes through the contact area corresponding to the inner point of the tire of the vehicle to be tested based on the sampling frequency of the acceleration sensor and the radial acceleration sampling data; The cycle calculation unit is used to calculate the tire rolling cycle of the vehicle to be tested according to the elapsed time and the data sampling point positions of the tire of the vehicle to be tested within the free rolling cycle.

[0014] Furthermore, the feature extraction module includes: A radius calculation unit, used to obtain the tire width of the vehicle to be tested and its corresponding tire diameter, and calculate the tire rolling radius of the vehicle to be tested according to the tire width and the tire diameter; A contact length calculation unit, used to calculate the contact length of the tire of the vehicle to be tested according to the tire rolling radius, the tire rolling period and the contact time; The vertical load calculation unit is used to construct the tire pressure coefficient and the rolling speed coefficient of the tire of the vehicle to be tested, and calculate the vertical load of the tire of the vehicle to be tested based on the tire pressure coefficient, the rolling speed coefficient, the tire contact length of the vehicle to be tested and the speed of the vehicle to be tested in the road test data.

[0015] The present invention also provides a readable storage medium on which a computer program is stored. When the program is executed by a processor, the above tire wear measurement method is implemented.

[0016] The present invention also provides a computer, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the above tire wear measurement method when executing the computer program.

[0017] The tire wear measurement method, system, readable storage medium and computer of the present invention perform a road test on the vehicle to be tested, calculate the contact time of the inner point of the tire and the tire rolling cycle based on the road test data, calculate the vertical load of the tire using the contact time and the tire rolling cycle, predict the relevant data of the tire through a one-dimensional sequence signal, thereby improving the efficiency of data processing, calculate the friction loss rate of the vehicle to be tested through the friction coefficient of the tire and the road test data, calculate the actual wear of the tire using the friction loss rate and the tire rolling cycle, calculate the wear prediction amount for the characteristic data and the vertical load through the constructed wear prediction model, judge the tire wear condition of the vehicle by comparing the wear prediction amount with the actual wear amount, and improve the accuracy of tire wear measurement by establishing the relationship between the characteristic data and the tire wear amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a flow chart of a tire wear measurement method in a first embodiment of the present invention; Figure 2 for Figure 1 Detailed flow chart of step S101; Figure 3 for Figure 1 Detailed flow chart of step S102; Figure 4 for Figure 1 Detailed flow chart of step S103; Figure 5 is a structural block diagram of a tire wear measurement system in a second embodiment of the present invention; Figure 6 FIG. 4 is a structural block diagram of a computer in a third embodiment of the present invention.

[0019] The following specific implementation manner will further illustrate the present invention in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0020] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0022] Embodiment 1 See also Figure 1 , which shows a tire wear measurement method in a first embodiment of the present invention, and the method specifically includes steps S101 to S105: S101, performing a road test experiment on the vehicle to be tested, and processing the result of the road test experiment based on a preset road test standard to obtain road test data of the vehicle to be tested; For further information, see Figure 2 , the step S101 specifically includes steps S1011~S1012: S1011, defining execution conditions of the road test experiment, and marking two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire; S1012, performing a road test on the vehicle to be tested based on the two coordinate points, the sensor position and the execution condition, and performing coordinate conversion and data processing on the collected road test data to obtain the road test data of the vehicle to be tested.

[0023] In the specific implementation, the execution conditions of the road test experiment are created, wherein the execution conditions include the road test process of the vehicle to be tested. In this embodiment, the road test process includes but is not limited to the following methods: First, enter the gas station, use the slowest gear in the automatic mode of the gas gun, refuel until the gun stops jumping, and record the amount of fuel and the mileage reading on the instrument. Secondly, drive along the No. 2 ring road to the entrance of the stone road, drive left to the entrance of the comprehensive road, stop and give way, turn right into the comprehensive road, pass the long slope road at an initial speed of 45km / h, slow down when reaching the twisted road, and pass the C twisted road at a speed of 10km / h; pass the north turn ring at 40km / h, enter the straight washboard road at an initial speed of 50km / h, and accelerate through it at full throttle; enter the next straight washboard road at a speed of 60km / h, and pass it by releasing the throttle. ; Pass the south turn at 40km / h, slow down when you reach the pothole, and pass the pothole at 10km / h; pass the bump road at 25km / h, and leave the bump road to the right; pass the north turn at 40km / h, enter the angled washboard road at an initial speed of 50km / h, and accelerate through it at full throttle; enter the next straight washboard road at 60km / h, and pass it with the throttle released; pass the south turn at 40km / h, and exit from the auxiliary Drive on the road, slow down when you turn right to the short-wave road, pass the short-wave road at a speed of 15km / h, leave the short-wave road to the right, slow down and give way at the exit of Comprehensive Road; enter the stone road, go around the stone road for 1 circle, that is, pass the north bend at a speed of 20km / h, pass the east straight section at a speed of 25km / h, and pass the splash pool; enter the No. 2 ring road, pass the north bend at a speed of 50km / h, enter the 2# brake road with an initial speed of 60Km / h and stop with emergency brake. Drive to the entrance and exit of the standard ramp, stop and give way; enter the standard ramp, go up the 16.6% slope and down the 20% slope, and brake and stop in the middle of the up and down slopes respectively, and use the parking brake to stop, and stop and give way at the entrance and exit of the standard ramp; enter the No. 2 Ring Road and drive to the entrance and exit of the No. 2 Ring Road; repeat the above steps and cycle 36 times, enter the gas station, use the same gas pump, use the slowest gear in the automatic mode of the gas gun, refuel until the gun stops, and record the amount of fuel refueled and the mileage reading on the instrument.

[0024] In the road test experiment, mark two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire. Take the sensor position as the origin and mark the coordinates of the two coordinate points. Perform a road test on the vehicle to be tested according to the coordinate marking points and the sensor position and the above-mentioned execution conditions, rotate the coordinate system of the collected road test data, and process the data after the coordinate system rotation to calculate the radial acceleration waveform of the sensor and the two coordinate points on the inner surface of the tire of the vehicle to be tested under free rolling conditions.

[0025] S102, parsing the radial acceleration sampling data in the road test data, and calculating the contact time of the inner measuring point of the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data; Furthermore, an acceleration sensor is installed at a measuring point inside the tire of the vehicle to be tested, see Figure 3 , the step S102 specifically includes steps S1021~S1022: S1021, calculating the time that the acceleration sensor passes within the contact area corresponding to the inner point of the tire of the vehicle to be tested based on the sampling frequency of the acceleration sensor and the radial acceleration sampling data; S1022: Calculate the tire rolling period of the vehicle to be tested according to the elapsed time and the data sampling point positions of the tire of the vehicle to be tested within the free rolling period.

[0026] In a specific implementation, the road test data obtained above are analyzed to obtain corresponding radial acceleration sampling data, and the sampling frequency of the acceleration sensor installed in the tire of the vehicle to be tested and the above radial acceleration sampling data are obtained to calculate the time the acceleration sensor passes in the contact area corresponding to the inner point of the tire of the vehicle to be tested according to the following formula: ; In the formula, Indicates the peak point in the radial acceleration sampling data The corresponding data sampling point position, Indicates the front peak point in the radial acceleration sampling data The corresponding data sampling point position, represents the sampling frequency of the acceleration sensor, Indicates the compensation coefficient of the acceleration sensor; Specifically, the tire rolling period is calculated using the above-obtained elapsed time and the data sampling point position of the tire of the vehicle to be tested within the free rolling period according to the following formula: ; In the formula, , They represent the first , No. The data sampling point position corresponding to the previous peak point in the cycle, , They represent the first , No. The data sampling point position corresponding to the last peak point in the cycle, Represents the rolling period coefficient, which is a constant.

[0027] In this embodiment, under the condition that the speed of the vehicle to be tested is 50 km / h, the sampling frequency is 4000 Hz, and the collected radial acceleration sampling waveform is processed. The two peaks of the waveform are the moment of entering the contact area and the moment of leaving the contact area. The waveform peak corresponding to the moment when the acceleration sensor inside the tire begins to enter the contact area is defined as the front peak, and the waveform peak corresponding to the moment of leaving the contact area is defined as the rear peak.

[0028] S103, calculating the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period, and performing feature extraction on the radial acceleration sampling data to obtain corresponding feature data; For further information, see Figure 4 , the step S103 specifically includes steps S1031 to S1033: S1031, obtaining the tire width of the vehicle to be tested and its corresponding tire diameter, and calculating the tire rolling radius of the vehicle to be tested according to the tire width and the tire diameter; S1032, calculating the tire contact length of the vehicle to be tested according to the tire rolling radius, the tire rolling period and the contact time; S1033, constructing a tire pressure coefficient and a rolling speed coefficient of the tire of the vehicle to be tested, and calculating a vertical load of the tire of the vehicle to be tested according to the tire pressure coefficient, the rolling speed coefficient, the contact length of the tire of the vehicle to be tested, and the speed of the vehicle to be tested in the road test data.

[0029] In a specific implementation, the tire width of the vehicle to be tested and its corresponding tire diameter are obtained, and the tire rolling radius of the vehicle to be tested is calculated according to the tire width and tire diameter. The tire rolling radius, the tire rolling period obtained above, and the contact time are used according to the corresponding motion relationship to obtain the contact length of the tire. Since there is an influence between tire pressure and tire rolling speed, the tire pressure coefficient and rolling speed coefficient of the vehicle to be tested are constructed, and when other variables of the vehicle to be tested are kept unchanged, corresponding curves are drawn for the tire pressure coefficient and the rolling speed coefficient to respectively determine the relationship between the tire pressure coefficient and the tire pressure and the tire rolling speed, and between the rolling speed coefficient and the tire pressure and the tire rolling speed. For example, the tire pressure is kept unchanged first, and the relationship between the tire rolling speed and the tire pressure coefficient and the rolling speed coefficient is determined using different functions, and the expression between the two coefficients and the tire rolling speed is obtained at each tire pressure, and then the tire pressure is gradually adjusted, and the final expression is determined according to the linear relationship between the tire pressure and the two coefficients: ; ; In the formula, is the tire pressure coefficient, is the rolling speed coefficient, Indicates tire pressure. Indicates the compensation parameter of the tire pressure coefficient, Compensation parameter representing the scroll speed coefficient.

[0030] The vertical load of the tire of the vehicle to be tested is calculated by using the tire pressure coefficient, rolling speed coefficient, tire contact length obtained above, and the speed of the vehicle to be tested in the road test data according to the following formula: ; ; In the formula, Indicates the tire contact length of the vehicle to be tested. Indicates the rolling radius of the tire of the vehicle to be tested, Indicates the tire pressure coefficient of the vehicle to be tested. Indicates the rolling speed coefficient of the tire of the vehicle to be tested, Indicates the speed of the vehicle to be tested.

[0031] Furthermore, feature extraction is performed on the radial acceleration sampling data obtained above to extract the radial acceleration characteristic value and the characteristic value of the radial acceleration differential in the radial acceleration sampling data.

[0032] S104, obtaining the friction coefficient of the tire of the vehicle to be tested, and calculating the friction loss rate of the tire of the vehicle to be tested according to the friction coefficient and the road test data, and calculating the actual wear amount of the tire of the vehicle to be tested according to the friction loss rate and the tire rolling cycle; In a specific implementation, the friction coefficient of the tire of the vehicle to be tested is obtained, and the above-mentioned road test data is input into a simulation analysis model for simulation analysis, so as to obtain the node slip rate of the tire of the vehicle to be tested on the contact surface and the corresponding contact normal reaction force, and the friction loss rate of the tire is calculated from the friction coefficient, the node slip rate and the contact normal reaction force, and the friction loss rate and the tire rolling period are input into a preset wear calculation model for calculation to obtain the actual wear amount of the vehicle to be tested.

[0033] S105, constructing a wear prediction model, and inputting the characteristic data and the vertical load into the wear prediction model to obtain a wear prediction amount, and comparing the wear prediction amount with the actual wear amount to output a corresponding comparison result.

[0034] In the specific implementation, a convolutional neural network model is defined and optimized to construct a wear prediction model. Specifically, the number of input layer nodes of the convolutional neural network model and the dimension of the input variables are set to be the same, the number of hidden layer layers of the convolutional neural network model is set to 1, the neuron connection mode is fully connected, the hyperbolic tangent Sigmoid function is selected as the activation function, and the linear ReLU function is selected as the activation function of the output layer.

[0035] Furthermore, the characteristic data and the vertical load obtained by the above calculation are input into the wear prediction model, so that the model predicts the data to obtain the predicted wear amount, and the predicted wear amount is compared with the actual wear amount obtained above. If the difference between the actual wear amount and the predicted wear amount is greater than the wear threshold, the vehicle to be tested is marked as abnormal, and the corresponding abnormal instruction is transmitted to enable the staff to inspect the vehicle to be tested.

[0036] In summary, the tire wear measurement method in the above-mentioned embodiment of the present invention performs a road test on the vehicle to be tested, calculates the contact time of the inner point of the tire and the tire rolling cycle according to the road test data, calculates the vertical load of the tire using the contact time and the tire rolling cycle, predicts the relevant data of the tire through a one-dimensional sequence signal, thereby improving the efficiency of data processing, calculates the friction loss rate of the vehicle to be tested through the friction coefficient of the tire and the road test data, calculates the actual wear of the tire using the friction loss rate and the tire rolling cycle, calculates the wear prediction amount for the characteristic data and the vertical load through the constructed wear prediction model, judges the tire wear condition of the vehicle by comparing the wear prediction amount with the actual wear amount, and improves the accuracy of tire wear measurement by establishing the relationship between the characteristic data and the tire wear amount.

[0037] Embodiment 2 Another aspect of the present invention is to provide a tire wear measurement system. Figure 5 , which is a tire wear measurement system in a second embodiment of the present invention, the system comprises: A road test module 11 is used to perform a road test on the vehicle to be tested, and process the result of the road test based on a preset road test standard to obtain road test data of the vehicle to be tested; Furthermore, the road test module 11 includes: A condition definition unit, used to define the execution conditions of the road test experiment, and mark two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire; The road test unit is used to perform a road test on the vehicle to be tested based on the two coordinate points, the sensor position and the execution conditions, and to perform coordinate conversion and data processing on the collected road test data to obtain the road test data of the vehicle to be tested.

[0038] A data calculation module 12 is used to parse the radial acceleration sampling data in the road test data, and calculate the contact time of the inner measuring point of the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data; Furthermore, an acceleration sensor is installed at a measuring point inside the tire of the vehicle to be tested, and the data calculation module 12 includes: A time calculation unit, configured to calculate the time that the acceleration sensor passes through the contact area corresponding to the inner point of the tire of the vehicle to be tested based on the sampling frequency of the acceleration sensor and the radial acceleration sampling data; The cycle calculation unit is used to calculate the tire rolling cycle of the vehicle to be tested according to the elapsed time and the data sampling point positions of the tire of the vehicle to be tested within the free rolling cycle.

[0039] A feature extraction module 13 is used to calculate the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period, and perform feature extraction on the radial acceleration sampling data to obtain corresponding feature data; Furthermore, the feature extraction module 13 includes: A radius calculation unit, used to obtain the tire width of the vehicle to be tested and its corresponding tire diameter, and calculate the tire rolling radius of the vehicle to be tested according to the tire width and the tire diameter; A contact length calculation unit, used to calculate the contact length of the tire of the vehicle to be tested according to the tire rolling radius, the tire rolling period and the contact time; The vertical load calculation unit is used to construct the tire pressure coefficient and the rolling speed coefficient of the tire of the vehicle to be tested, and calculate the vertical load of the tire of the vehicle to be tested based on the tire pressure coefficient, the rolling speed coefficient, the tire contact length of the vehicle to be tested and the speed of the vehicle to be tested in the road test data.

[0040] A wear calculation module 14 is used to obtain the friction coefficient of the tire of the vehicle to be tested, and calculate the friction loss rate of the tire of the vehicle to be tested according to the friction coefficient and the road test data, and calculate the actual wear amount of the tire of the vehicle to be tested according to the friction loss rate and the tire rolling cycle; The wear comparison module 15 is used to construct a wear prediction model, and input the characteristic data and the vertical load into the wear prediction model to obtain a wear prediction amount, and compare the wear prediction amount with the actual wear amount to output a corresponding comparison result.

[0041] The functions or operation steps implemented when the above modules and units are executed are generally the same as those in the above method embodiments, and will not be repeated here.

[0042] The tire wear measurement system provided in the embodiment of the present invention has the same implementation principle and technical effects as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the system embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0043] Embodiment 3 The present invention also provides a computer, see Figure 6 , shown is a computer in the third embodiment of the present invention, including a memory 10, a processor 20, and a computer program 30 stored in the memory 10 and executable on the processor 20. When the processor 20 executes the computer program 30, the above-mentioned tire wear measurement method is implemented.

[0044] The memory 10 includes at least one type of readable storage medium, which includes a flash memory, a hard disk, a multimedia card, a card-type memory (e.g., an SD or DX memory, etc.), a magnetic memory, a magnetic disk, an optical disk, etc. In some embodiments, the memory 10 may be an internal storage unit of a computer, such as a hard disk of the computer. In other embodiments, the memory 10 may also be an external storage device, such as a plug-in hard disk, a smart memory card (Smart Media Card, SMC), a secure digital (Secure Digital, SD) card, a flash card, etc. Further, the memory 10 may also include both an internal storage unit of the computer and an external storage device. The memory 10 may be used not only to store application software and various types of data installed in the computer, but also to temporarily store data that has been output or is to be output.

[0045] Among them, in some embodiments, the processor 20 can be an electronic control unit (Electronic Control Unit, abbreviated as ECU, also known as a vehicle computer), a central processing unit (Central Processing Unit, CPU), a controller, a microcontroller, a microprocessor or other data processing chip, used to run the program code stored in the memory 10 or process data, such as executing access restriction programs, etc.

[0046] It should be pointed out that Figure 6The structure shown does not constitute a limitation on the computer. In other embodiments, the computer may include fewer or more components than shown in the figure, or combine certain components, or arrange the components differently.

[0047] The embodiment of the present invention further provides a readable storage medium on which a computer program is stored. When the program is executed by a processor, the tire wear measurement method as described above is implemented.

[0048] Those skilled in the art will appreciate that the logic and / or steps represented in the flowchart or otherwise described herein, for example, may be considered as an ordered list of executable instructions for implementing logical functions, and may be specifically implemented in any computer-readable medium for use by an instruction execution system, device or apparatus (such as a computer-based system, a system including a processor, or other system that can fetch instructions from an instruction execution system, device or apparatus and execute instructions), or in conjunction with such instruction execution systems, devices or apparatuses. For purposes of this specification, "computer-readable medium" may be any device that can contain, store, communicate, propagate or transmit a program for use by an instruction execution system, device or apparatus, or in conjunction with such instruction execution systems, devices or apparatuses.

[0049] More specific examples of computer-readable media (a non-exhaustive list) include the following: an electrical connection with one or more wires (electronic device), a portable computer disk case (magnetic device), a random access memory (RAM), a read-only memory (ROM), an erasable and programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disk read-only memory (CDROM). In addition, the computer-readable medium may even be a paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, deciphering or, if necessary, processing in another suitable manner, and then stored in a computer memory.

[0050] It should be understood that the various parts of the present invention can be implemented by hardware, software, firmware or a combination thereof. In the above-mentioned embodiments, multiple steps or methods can be implemented by software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented by hardware, as in another embodiment, it can be implemented by any one of the following technologies known in the art or a combination thereof: a discrete logic circuit having a logic gate circuit for implementing a logic function for a data signal, a dedicated integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0051] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application shall be subject to the attached claims.

Claims

1. A tire wear measurement method, characterized in that: include: Performing a road test on the vehicle to be tested, and processing the result of the road test based on a preset road test standard to obtain road test data of the vehicle to be tested; Parsing the radial acceleration sampling data in the road test data, and calculating the contact time of the inner measuring point of the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data; Calculating the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period, and performing feature extraction on the radial acceleration sampling data to obtain corresponding feature data; Obtaining the friction coefficient of the tire of the vehicle to be tested, and calculating the friction loss rate of the tire of the vehicle to be tested according to the friction coefficient and the road test data, and calculating the actual wear amount of the tire of the vehicle to be tested according to the friction loss rate and the tire rolling cycle; A wear prediction model is constructed, and the characteristic data and the vertical load are input into the wear prediction model to obtain a wear prediction amount, and the wear prediction amount is compared with the actual wear amount to output a corresponding comparison result.

2. The tire wear measurement method according to claim 1, characterized in that: The steps of performing a road test on the vehicle to be tested and processing the result of the road test based on a preset road test standard to obtain the road test data of the vehicle to be tested include: Defining the execution conditions of the road test experiment, and marking two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire; A road test is performed on the vehicle to be tested based on the two coordinate points, the sensor position and the execution conditions, and coordinate conversion and data processing are performed on the collected road test data to obtain the road test data of the vehicle to be tested.

3. The tire wear measurement method according to claim 1, characterized in that: An acceleration sensor is installed at a measuring point inside the tire of the vehicle to be tested, and the step of calculating the contact time of the measuring point inside the tire of the vehicle to be tested and the tire rolling cycle of the vehicle to be tested according to the radial acceleration sampling data comprises: Calculating the time that the acceleration sensor passes within the contact area corresponding to the inner point of the tire of the vehicle to be tested based on the sampling frequency of the acceleration sensor and the radial acceleration sampling data; The tire rolling period of the vehicle to be tested is calculated according to the elapsed time and the data sampling point positions of the tire of the vehicle to be tested within the free rolling period.

4. The tire wear measurement method according to claim 3, characterized in that: The calculation formula for the time that the acceleration sensor spends in the contact area corresponding to the inner point of the tire of the vehicle to be tested is: ； In the formula, Indicates the peak point in the radial acceleration sampling data The corresponding data sampling point position, Indicates the front peak point in the radial acceleration sampling data The corresponding data sampling point position, represents the sampling frequency of the acceleration sensor, Indicates the compensation coefficient of the acceleration sensor; The calculation formula of the tire rolling period of the vehicle to be tested is: ； In the formula, , They represent the first , No. The data sampling point position corresponding to the previous peak point in the cycle, , They represent the first , No. The data sampling point position corresponding to the last peak point in the cycle, Represents the rolling period coefficient, which is a constant.

5. The tire wear measurement method according to claim 1, characterized in that: The step of calculating the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling cycle includes: Obtaining the tire width of the vehicle to be tested and its corresponding tire diameter, and calculating the tire rolling radius of the vehicle to be tested according to the tire width and the tire diameter; Calculating the tire contact length of the vehicle to be tested according to the tire rolling radius, the tire rolling period and the contact time; The tire pressure coefficient and rolling speed coefficient of the tire of the vehicle to be tested are constructed, and the vertical load of the tire of the vehicle to be tested is calculated according to the tire pressure coefficient, the rolling speed coefficient, the contact length of the tire of the vehicle to be tested, and the speed of the vehicle to be tested in the road test data.

6. The tire wear measurement method according to claim 1, characterized in that: The calculation formula of the vertical load of the tire of the vehicle to be tested is: ； ； In the formula, Indicates the tire contact length of the vehicle to be tested. Indicates the rolling radius of the tire of the vehicle to be tested, Indicates the tire pressure coefficient of the vehicle to be tested. Indicates the rolling speed coefficient of the tire of the vehicle to be tested, Indicates the speed of the vehicle to be tested.

7. A tire wear measurement system, characterized in that: include: A road test module, used to perform a road test on the vehicle to be tested, and process the result of the road test based on a preset road test standard to obtain road test data of the vehicle to be tested; A data calculation module, used to parse the radial acceleration sampling data in the road test data, and calculate the contact time of the inner measuring point of the tire of the vehicle to be tested and the tire rolling period of the vehicle to be tested according to the radial acceleration sampling data; A feature extraction module, used to calculate the vertical load of the tire of the vehicle to be tested according to the contact time and the tire rolling period, and perform feature extraction on the radial acceleration sampling data to obtain corresponding feature data; a wear amount calculation module, used to obtain the friction coefficient of the tire of the vehicle to be tested, and calculate the friction loss rate of the tire of the vehicle to be tested according to the friction coefficient and the road test data, and calculate the actual wear amount of the tire of the vehicle to be tested according to the friction loss rate and the tire rolling period; The wear comparison module is used to construct a wear prediction model, and input the characteristic data and the vertical load into the wear prediction model to obtain a wear prediction amount, and compare the wear prediction amount with the actual wear amount to output a corresponding comparison result.

8. The tire wear measurement system according to claim 7, characterized in that: The road test module includes: A condition definition unit, used to define the execution conditions of the road test experiment, and mark two coordinate points on the center line of the inner wall of the tire of the vehicle to be tested and the position of the sensor installed in the tire; The road test unit is used to perform a road test on the vehicle to be tested based on the two coordinate points, the sensor position and the execution conditions, and to perform coordinate conversion and data processing on the collected road test data to obtain the road test data of the vehicle to be tested.

9. A readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the tire wear measurement method according to any one of claims 1 to 6 is implemented.

10. A computer comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the tire wear measurement method according to any one of claims 1 to 6 is implemented.

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