Tire rigidity measuring method, vehicle and storage medium

Abstract

The embodiment of the invention provides a tire rigidity measuring method, a vehicle and a storage medium. The method comprises the steps that load data of a target tire on the vehicle and environment data of the environment where the vehicle is located currently are obtained; and determining the tire rigidity of the target tire based on the load data and the environment data by using the parameter mapping relationship. The technical problem that the efficiency of measuring the rigidity of the target tire in the vehicle driving process is low in the related technology is solved.

Description

TECHNICAL FIELD

[0001] Embodiments of the present application relate to the field of data processing, in particular to a tire stiffness measurement method, a vehicle and a storage medium. BACKGROUND

[0002] Currently, when measuring the stiffness of a target tire on a vehicle, a large amount of data related to the stiffness needs to be obtained, and then the data needs to be repeatedly corrected, modified and compensated to ensure the accuracy of the measured stiffness. Repeatedly adjusting the data, although it improves the accuracy of the measurement to some extent, also increases the computational burden, and in some scenarios that require timely measurement of tire stiffness, such as suspension system adjustment, emergency braking control, high-speed turning stability control, etc., it usually affects the efficiency of measuring tire stiffness, and cannot meet the demand for rapid measurement of tire stiffness.

[0003] At present, there is no good solution to the above problems. SUMMARY

[0004] Embodiments of the present application provide a tire stiffness measurement method, a vehicle and a storage medium to at least solve the technical problem of low efficiency in measuring the stiffness of a target tire during vehicle driving in the related art.

[0005] According to an aspect of an embodiment of the present application, a tire stiffness measurement method is provided, comprising: obtaining load data of a target tire on a vehicle, and environment data of an environment in which the vehicle is currently located; determining the tire stiffness of the target tire based on the load data and the environment data by using a parameter mapping relationship, wherein the parameter mapping relationship is used to represent the correlation between the load data, the environment data and the tire stiffness, and the parameter mapping relationship includes: a first correlation and a second correlation, the first correlation is used to represent the correlation between the load data, the environment data and the tire stiffness obtained by testing a test bench by using test data, and the second correlation is used to represent the correlation between the load data, the environment data and the tire stiffness obtained by interpolating the test data.

[0006] Further, the load data includes: the tire load and tire pressure of the target tire, and the environmental data includes: the ambient temperature. Using parameter mapping relationships, based on the load data and environmental data, the tire stiffness of the target tire is determined, including: obtaining a parameter mapping table, wherein the parameter mapping table is used to store the correlation between tire load, tire pressure, ambient temperature, and tire stiffness; searching the parameter mapping table based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature to obtain a stiffness search result, wherein the stiffness search result is used to characterize whether a first stiffness value corresponding to the first load value, the first tire pressure value, and the first temperature value is stored in the parameter mapping table; in response to the stiffness search result indicating the existence of a first stiffness value, the first stiffness value is determined as the tire stiffness value.

[0007] Furthermore, based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, a parameter mapping table is retrieved to obtain stiffness retrieval results, including: determining a second load value from the parameter mapping table based on the first load value, determining a second tire pressure value from the parameter mapping table based on the first tire pressure value, and determining a second temperature value from the parameter mapping table based on the first temperature value. The difference between the second load value and the first load value is less than the difference between other load values ​​and the first load value in the parameter mapping table, and the difference between the second tire pressure value and the first tire pressure value is less than the difference between the second load value and the first tire pressure value in the parameter mapping table. The differences between other tire pressure values ​​and the first tire pressure value, and the differences between the second temperature value and the first temperature value, are less than the differences between other temperature values ​​and the first temperature value in the parameter mapping table; the first difference between the first load value and the second load value, the second difference between the first tire pressure value and the second tire pressure value, and the third difference between the first temperature value and the second temperature value are obtained; in response to the first difference being less than or equal to a first threshold, the second difference being less than or equal to a second threshold, and the third difference being less than or equal to a third threshold, the stiffness retrieval result is determined to be that a first stiffness value exists, and the first stiffness value is determined based on the second load value, the second tire pressure value, and the second temperature value.

[0008] Furthermore, the above method also includes: in response to a first difference being greater than a first threshold, or a second difference being greater than a second threshold, or a third difference being greater than a third threshold, obtaining a third load value, a third tire pressure value, and a third temperature value, wherein the first load value is between the second load value and the third load value, the first tire pressure value is between the second tire pressure value and the third tire pressure value, and the first temperature value is between the second temperature value and the third temperature value; based on a parameter mapping table, obtaining a second stiffness value corresponding to the second load value, the second tire pressure value, and the second temperature value, and a third stiffness value corresponding to the third load value, the third tire pressure value, and the third temperature value; inputting the first load value, the second load value, the third load value, the first tire pressure value, the second tire pressure value, the third tire pressure value, the first temperature value, the second temperature value, the third temperature value, the second stiffness value, and the third stiffness value into a numerical interpolation model, and using the numerical interpolation model to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value.

[0009] Further, the first load value, second load value, third load value, first tire pressure value, second tire pressure value, third tire pressure value, first temperature value, second temperature value, third temperature value, second stiffness value, and third stiffness value are input into the numerical interpolation model. The numerical interpolation model is used to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value. This includes: obtaining the first position of the first load value in the load value interval, the second position of the first tire pressure value in the tire pressure value interval, and the third position of the first temperature value in the temperature value interval, wherein the load value interval is composed of the second load value and the third load value, the tire pressure value interval is composed of the second tire pressure value and the third tire pressure value, and the temperature value interval is composed of the second temperature value and the third temperature value; the numerical interpolation model is used to process the first position, the second position, and the third position to obtain the weighted weight values ​​corresponding to the second stiffness value and the third stiffness value; the second stiffness value and the third stiffness value are weighted based on the weighted weight values ​​to obtain the first stiffness value.

[0010] Furthermore, the first load value is sensed by a strain gauge load sensor, which is deployed on the vehicle's axle or suspension arm.

[0011] Furthermore, in response to the absence of strain gauge load sensors deployed on the axle or suspension arms, the method further includes: acquiring the vehicle's total load value and the suspension acceleration; determining the initial load value of the target tire based on the tire position and the total load value; performing frequency domain integral displacement processing on the suspension acceleration to obtain the suspension displacement curve, wherein the displacement curve is used to reflect the current displacement change of the suspension; and adjusting the initial load value based on the displacement curve to obtain a first load value.

[0012] Furthermore, the above method also includes: obtaining the test load value, test tire pressure value, and test temperature value corresponding to the test tire, wherein the model of the test tire is the same as that of the target tire; configuring the initial test bench based on the test load value, test tire pressure value, and test temperature value to obtain the target test bench; measuring the stiffness of the test tire using the target test bench to obtain the measured stiffness value; interpolating the test load value, test tire pressure value, test temperature value, and stiffness measurement value to obtain interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value; and constructing a parameter mapping table based on the test load value, test tire pressure value, test temperature value, measured stiffness value, interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value.

[0013] According to another aspect of the embodiments of this application, a tire stiffness measuring device is also provided, comprising: a data acquisition module for acquiring load data of a target tire on a vehicle and environmental data of the current environment of the vehicle; and a stiffness determination module for determining the tire stiffness of the target tire based on the load data and environmental data using a parameter mapping relationship, wherein the parameter mapping relationship is used to characterize the correlation between the load data, environmental data and tire stiffness, and the parameter mapping relationship includes: a first correlation relationship and a second correlation relationship, wherein the first correlation relationship is used to characterize the correlation between the load data, environmental data and tire stiffness obtained by testing the test data using a test bench, and the second correlation relationship is used to characterize the correlation between the load data, environmental data and tire stiffness obtained by interpolating the test data.

[0014] Furthermore, the load data includes: the tire load and tire pressure of the target tire, and the environmental data includes: the ambient temperature. The stiffness determination module is also used to: obtain a parameter mapping table, wherein the parameter mapping table is used to store the correlation between tire load, tire pressure, ambient temperature and tire stiffness; based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, the parameter mapping table is searched to obtain a stiffness search result, wherein the stiffness search result is used to characterize whether the parameter mapping table stores a first stiffness value corresponding to the first load value, the first tire pressure value and the first temperature value; in response to the stiffness search result indicating the existence of a first stiffness value, the first stiffness value is determined as the stiffness value of the tire stiffness.

[0015] Furthermore, the stiffness determination module is also used to: determine a second load value from a parameter mapping table based on a first load value, determine a second tire pressure value from a parameter mapping table based on a first tire pressure value, and determine a second temperature value from a parameter mapping table based on a first temperature value, wherein the difference between the second load value and the first load value is less than the difference between other load values ​​in the parameter mapping table and the first load value, the difference between the second tire pressure value and the first tire pressure value is less than the difference between other tire pressure values ​​in the parameter mapping table and the first tire pressure value, and the difference between the second temperature value and the first temperature value is less than the difference between other temperature values ​​in the parameter mapping table and the first temperature value; obtain a first difference between the first load value and the second load value, a second difference between the first tire pressure value and the second tire pressure value, and a third difference between the first temperature value and the second temperature value; in response to the first difference being less than or equal to a first threshold, the second difference being less than or equal to a second threshold, and the third difference being less than or equal to a third threshold, determine that the stiffness retrieval result indicates the existence of a first stiffness value, and determine the first stiffness value based on the second load value, the second tire pressure value, and the second temperature value.

[0016] Furthermore, the stiffness determination module is also used to: in response to a first difference being greater than a first threshold, or a second difference being greater than a second threshold, or a third difference being greater than a third threshold, obtain a third load value, a third tire pressure value, and a third temperature value, wherein the first load value is between the second load value and the third load value, the first tire pressure value is between the second tire pressure value and the third tire pressure value, and the first temperature value is between the second temperature value and the third temperature value; based on a parameter mapping table, obtain the second stiffness value corresponding to the second load value, the second tire pressure value, and the second temperature value, as well as the third stiffness value corresponding to the third load value, the third tire pressure value, and the third temperature value; input the first load value, the second load value, the third load value, the first tire pressure value, the second tire pressure value, the third tire pressure value, the first temperature value, the second temperature value, the third temperature value, the second stiffness value, and the third stiffness value into a numerical interpolation model, and use the numerical interpolation model to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value.

[0017] Furthermore, the stiffness determination module is also used to: obtain the first position of the first load value in the load value interval, the second position of the first tire pressure value in the tire pressure value interval, and the third position of the first temperature value in the temperature value interval, wherein the load value interval is composed of the second load value and the third load value, the tire pressure value interval is composed of the second tire pressure value and the third tire pressure value, and the temperature value interval is composed of the second temperature value and the third temperature value; process the first position, the second position, and the third position using a numerical interpolation model to obtain the weighted weight values ​​corresponding to the second stiffness value and the third stiffness value; and perform weighted processing on the second stiffness value and the third stiffness value based on the weighted weight values ​​to obtain the first stiffness value.

[0018] Furthermore, the first load value is sensed by a strain gauge load sensor, which is deployed on the vehicle's axle or suspension arm.

[0019] Furthermore, the data acquisition module is also used to: acquire the vehicle's total load value and the suspension acceleration; determine the initial load value of the target tire based on the tire position and total load value of the target tire; perform frequency domain integral displacement processing on the suspension acceleration to obtain the suspension displacement curve, wherein the displacement curve is used to reflect the current displacement change of the suspension; and adjust the initial load value based on the displacement curve to obtain the first load value.

[0020] Furthermore, the stiffness determination module is also used to: obtain the test load value, test tire pressure value, and test temperature value corresponding to the test tire, wherein the model of the test tire is the same as that of the target tire; configure the initial test bench based on the test load value, test tire pressure value, and test temperature value to obtain the target test bench; measure the stiffness of the test tire using the target test bench to obtain the measured stiffness value; perform interpolation processing on the test load value, test tire pressure value, test temperature value, and stiffness measurement value to obtain the interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value; and construct a parameter mapping table based on the test load value, test tire pressure value, test temperature value, measured stiffness value, interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value.

[0021] According to another aspect of the embodiments of this application, a vehicle is also provided, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods in various embodiments of this application when it runs.

[0022] According to another aspect of the embodiments of this application, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of this application.

[0023] According to another aspect of the embodiments of this application, a computer program product is also provided, including a computer program that, when executed by a processor, implements the methods of various embodiments of this application.

[0024] According to another aspect of the embodiments of this application, a computer program product is also provided, including a non-volatile computer-readable storage medium storing a computer program, which, when executed by a processor, implements the methods in various embodiments of this application.

[0025] According to another aspect of the embodiments of this application, a computer program is also provided, which, when executed by a processor, implements the methods of the various embodiments of this application.

[0026] In this embodiment, the load data of the target tire on the vehicle and the environmental data of the vehicle's current environment are acquired. The tire stiffness of the target tire is determined based on the load data and environmental data using a parameter mapping relationship. By using interpolation to expand the coverage of the parameter mapping table during its construction, and then determining the tire stiffness based on the real-time acquired load and environmental data, the time loss caused by correcting and compensating for the load and environmental data can be reduced. This improves the efficiency of tire stiffness determination while ensuring its accuracy, thus solving the technical problem of low efficiency in measuring the stiffness of a target tire during vehicle operation in related technologies. Attached Figure Description

[0027] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0028] Figure 1 This is a flowchart illustrating a method for measuring tire stiffness according to an embodiment of this application;

[0029] Figure 2 This is a schematic diagram illustrating a tire stiffness measurement process according to an embodiment of this application;

[0030] Figure 3 This is a structural block diagram of a tire stiffness measuring device according to an embodiment of this application. Detailed Implementation

[0031] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0032] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0033] According to an embodiment of this application, a method for measuring tire stiffness is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0034] This embodiment provides a method for measuring tire stiffness. Figure 1 This is a flowchart illustrating a method for measuring tire stiffness according to an embodiment of this application, such as... Figure 1 As shown, the process includes the following steps:

[0035] Step S102: Obtain the load data of the target tire on the vehicle, as well as the environmental data of the current environment of the vehicle.

[0036] In one optional embodiment, considering that parameters related to the stiffness of the target tire on the vehicle, such as temperature and tire pressure, typically change during vehicle operation, determining the stiffness of the target tire in a timely and effective manner becomes the primary objective. Therefore, to improve the efficiency of determining the target tire stiffness, the measurement system can quickly determine the tire stiffness based on pre-built mapping relationships and certain target parameters that affect the stiffness of the target tire. However, given the significant non-linear relationship between tire stiffness and temperature and tire pressure, the measurement system needs to first acquire load data of the target tire on the vehicle, such as real-time single-wheel load and real-time tire pressure, when determining tire stiffness through pre-built mapping relationships. Since the mechanical properties of tire materials change with temperature, in order to ensure the accuracy of the determined tire stiffness, in addition to acquiring load data, the measurement system can also acquire environmental data of the vehicle's current environment, such as real-time temperature, air pressure, and humidity. Then, based on the load data and environmental data, the tire stiffness of the target tire is determined.

[0037] Step S104: Using parameter mapping relationships, the tire stiffness of the target tire is determined based on load data and environmental data.

[0038] The parameter mapping relationship is used to characterize the correlation between load data, environmental data and tire stiffness. The parameter mapping relationship includes: a first correlation relationship and a second correlation relationship. The first correlation relationship is used to characterize the correlation between load data, environmental data and tire stiffness obtained by testing the test data through the test bench. The second correlation relationship is used to characterize the correlation between load data, environmental data and tire stiffness obtained by interpolating the test data.

[0039] The aforementioned parameter mapping relationship refers to a pre-constructed mapping correlation that reflects the relationship between load data, environmental data, and tire stiffness. However, even with a detailed test plan, the measurement system cannot measure tire stiffness under all conditions when constructing the parameter mapping relationship, which would increase the cost of stiffness testing and cause unnecessary waste. Therefore, in order to cover all situations that may affect tire stiffness as much as possible while reducing testing costs, the measurement system can first measure the correlation between load data, environmental data, and tire stiffness using conventional test data on a test bench to obtain the aforementioned first correlation. This first correlation can be the correlation between load data, environmental data, and tire stiffness constructed under known data. Then, the measurement system can interpolate the test data to obtain the correlation between load data, environmental data, and tire stiffness under unknown data, i.e., the aforementioned second correlation. Finally, by combining the first and second correlations, a parameter correlation with wide coverage, high accuracy, and smoothness can be obtained.

[0040] Based on the established parameter correlation, the measurement system can directly and efficiently determine the current tire stiffness of the target tire in real time, based on the acquired load and environmental data.

[0041] In this embodiment, the load data of the target tire on the vehicle and the environmental data of the vehicle's current environment are acquired. The tire stiffness of the target tire is determined based on the load data and environmental data using a parameter mapping relationship. By using interpolation to expand the coverage of the parameter mapping table during its construction, and then determining the tire stiffness based on the real-time acquired load and environmental data, the time loss caused by correcting and compensating for the load and environmental data can be reduced. This improves the efficiency of tire stiffness determination while ensuring its accuracy, thus solving the technical problem of low efficiency in measuring the stiffness of a target tire during vehicle operation in related technologies.

[0042] Further, the load data includes: the tire load and tire pressure of the target tire, and the environmental data includes: the ambient temperature. Using parameter mapping relationships, based on the load data and environmental data, the tire stiffness of the target tire is determined, including: obtaining a parameter mapping table, wherein the parameter mapping table is used to store the correlation between tire load, tire pressure, ambient temperature, and tire stiffness; searching the parameter mapping table based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature to obtain a stiffness search result, wherein the stiffness search result is used to characterize whether a first stiffness value corresponding to the first load value, the first tire pressure value, and the first temperature value is stored in the parameter mapping table; in response to the stiffness search result indicating the existence of a first stiffness value, the first stiffness value is determined as the tire stiffness value.

[0043] In one optional embodiment, to improve the accuracy of the measured tire stiffness, the acquired load data may include at least the tire load and tire pressure of the target tire, and the acquired environmental data may include at least the current ambient temperature. Correspondingly, when determining tire stiffness, the measurement system can first acquire a parameter mapping table, i.e., a data table storing the correlation between tire load, tire pressure, ambient temperature, and tire stiffness. Then, using the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, the parameter mapping table is searched to determine whether a first stiffness value corresponding to the first load value, first tire pressure value, and first temperature value is stored in the parameter mapping table, thus obtaining the aforementioned stiffness search result. If the stiffness search result shows the existence of a first stiffness value, the measurement system can directly determine the first stiffness value as the tire stiffness value.

[0044] Furthermore, based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, a parameter mapping table is retrieved to obtain stiffness retrieval results, including: determining a second load value from the parameter mapping table based on the first load value, determining a second tire pressure value from the parameter mapping table based on the first tire pressure value, and determining a second temperature value from the parameter mapping table based on the first temperature value. The difference between the second load value and the first load value is less than the difference between other load values ​​and the first load value in the parameter mapping table, and the difference between the second tire pressure value and the first tire pressure value is less than the difference between the second load value and the first tire pressure value in the parameter mapping table. The differences between other tire pressure values ​​and the first tire pressure value, and the differences between the second temperature value and the first temperature value, are less than the differences between other temperature values ​​and the first temperature value in the parameter mapping table; the first difference between the first load value and the second load value, the second difference between the first tire pressure value and the second tire pressure value, and the third difference between the first temperature value and the second temperature value are obtained; in response to the first difference being less than or equal to a first threshold, the second difference being less than or equal to a second threshold, and the third difference being less than or equal to a third threshold, the stiffness retrieval result is determined to be that a first stiffness value exists, and the first stiffness value is determined based on the second load value, the second tire pressure value, and the second temperature value.

[0045] In one optional embodiment, to accurately retrieve the parameter mapping table, the measurement system can determine the second load value closest to the first load value from the parameter mapping table, i.e., the difference between the second load value and the first load value is less than the difference between other load values ​​in the parameter mapping table and the first load value. Simultaneously, it can determine the second tire pressure value closest to the first tire pressure value from the parameter mapping table, i.e., the difference between the second tire pressure value and the first tire pressure value is less than the difference between other tire pressure values ​​in the parameter mapping table and the first tire pressure value. And based on the first temperature value, it can determine the second temperature value closest to the first temperature value from the parameter mapping table, i.e., the difference between the second temperature value and the first temperature value is less than the difference between other temperature values ​​in the parameter mapping table and the first temperature value.

[0046] After determining the second load value, the second tire pressure value, and the second temperature value, the measurement system can obtain the first difference between the first load value and the second load value, the second difference between the first tire pressure value and the second tire pressure value, and the third difference between the first temperature value and the second temperature value. Correspondingly, if the first difference is less than or equal to a first threshold, the second difference is less than or equal to a second threshold, and the third difference is less than or equal to a third threshold, then the measurement system can determine that the stiffness retrieval result indicates the existence of a first stiffness value, and determine the first stiffness value based on the second load value, the second tire pressure value, and the second temperature value.

[0047] Furthermore, the above method also includes: in response to a first difference being greater than a first threshold, or a second difference being greater than a second threshold, or a third difference being greater than a third threshold, obtaining a third load value, a third tire pressure value, and a third temperature value, wherein the first load value is between the second load value and the third load value, the first tire pressure value is between the second tire pressure value and the third tire pressure value, and the first temperature value is between the second temperature value and the third temperature value; based on a parameter mapping table, obtaining a second stiffness value corresponding to the second load value, the second tire pressure value, and the second temperature value, and a third stiffness value corresponding to the third load value, the third tire pressure value, and the third temperature value; inputting the first load value, the second load value, the third load value, the first tire pressure value, the second tire pressure value, the third tire pressure value, the first temperature value, the second temperature value, the third temperature value, the second stiffness value, and the third stiffness value into a numerical interpolation model, and using the numerical interpolation model to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value.

[0048] In one optional embodiment, if the first difference is greater than a first threshold, or the second difference is greater than a second threshold, or the third difference is greater than a third threshold, the measurement system can determine the stiffness value of the target tire's current stiffness through interpolation. Based on this, the measurement system can first acquire a third load value, a third tire pressure value, and a third temperature value, wherein the first load value is between the second and third load values, the first tire pressure value is between the second and third tire pressure values, and the first temperature value is between the second and third temperature values. If the third load value, third tire pressure value, and third temperature value are successfully obtained, the measurement system can obtain the second stiffness value corresponding to the second load value, second tire pressure value, and second temperature value, as well as the third stiffness value corresponding to the third load value, third tire pressure value, and third temperature value, according to the parameter mapping table. Then, the first load value, second load value, third load value, first tire pressure value, second tire pressure value, third tire pressure value, first temperature value, second temperature value, third temperature value, second stiffness value, and third stiffness value are input into the numerical interpolation model. The numerical interpolation model is used to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value.

[0049] If the acquisition of the third load value, the third tire pressure value, and the third temperature value fails, the measurement system can also acquire the trend of tire stiffness change within the preset range of the second load value, the second tire pressure value, and the third temperature value, and then determine the first stiffness value corresponding to the first load value, the first tire pressure value, and the first temperature value based on this trend.

[0050] Further, the first load value, second load value, third load value, first tire pressure value, second tire pressure value, third tire pressure value, first temperature value, second temperature value, third temperature value, second stiffness value, and third stiffness value are input into the numerical interpolation model. The numerical interpolation model is used to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value. This includes: obtaining the first position of the first load value in the load value interval, the second position of the first tire pressure value in the tire pressure value interval, and the third position of the first temperature value in the temperature value interval, wherein the load value interval is composed of the second load value and the third load value, the tire pressure value interval is composed of the second tire pressure value and the third tire pressure value, and the temperature value interval is composed of the second temperature value and the third temperature value; the numerical interpolation model is used to process the first position, the second position, and the third position to obtain the weighted weight values ​​corresponding to the second stiffness value and the third stiffness value; the second stiffness value and the third stiffness value are weighted based on the weighted weight values ​​to obtain the first stiffness value.

[0051] In one optional embodiment, when determining the first stiffness value using a numerical interpolation model, the measurement system can first obtain the first position of the first load value within the load value interval, the second position of the first tire pressure value within the tire pressure value interval, and the third position of the first temperature value within the temperature value interval. The load value interval is composed of the second and third load values, the tire pressure value interval is composed of the second and third tire pressure values, and the temperature value interval is composed of the second and third temperature values. After obtaining the first, second, and third positions, the measurement system can use the numerical interpolation model to process the first, second, and third positions to obtain the weighted values ​​corresponding to the second and third stiffness values. Finally, the second and third stiffness values ​​are weighted according to the weighted values ​​to obtain the aforementioned first stiffness value.

[0052] Furthermore, the first load value is sensed by a strain gauge load sensor, which is deployed on the vehicle's axle or suspension arm.

[0053] In one alternative embodiment, in order to accurately obtain the first load value, a strain gauge load sensor can be deployed on the vehicle axle or suspension arm, and then the strain gauge load sensor can sense the tire load of the target tire in real time.

[0054] Furthermore, in response to the absence of strain gauge load sensors deployed on the axle or suspension arms, the method further includes: acquiring the vehicle's total load value and the suspension acceleration; determining the initial load value of the target tire based on the tire position and the total load value; performing frequency domain integral displacement processing on the suspension acceleration to obtain the suspension displacement curve, wherein the displacement curve is used to reflect the current displacement change of the suspension; and adjusting the initial load value based on the displacement curve to obtain a first load value.

[0055] In one optional embodiment, if strain gauge load sensors are not deployed on the axle or suspension arms, when determining the tire load of the target tire, the measurement system can first acquire the vehicle's total load value and the suspension acceleration. Then, based on the tire position of the target tire and the total vehicle load value, it determines the initial load value of the target tire. Simultaneously, it performs frequency domain integral displacement processing on the suspension acceleration to obtain the suspension displacement curve. The displacement curve reflects the current displacement change of the suspension. After obtaining the displacement curve and the initial load value, the measurement system can adjust the initial load value based on the displacement curve to obtain a first load value.

[0056] Furthermore, the above method also includes: obtaining the test load value, test tire pressure value, and test temperature value corresponding to the test tire, wherein the model of the test tire is the same as that of the target tire; configuring the initial test bench based on the test load value, test tire pressure value, and test temperature value to obtain the target test bench; measuring the stiffness of the test tire using the target test bench to obtain the measured stiffness value; interpolating the test load value, test tire pressure value, test temperature value, and stiffness measurement value to obtain interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value; and constructing a parameter mapping table based on the test load value, test tire pressure value, test temperature value, measured stiffness value, interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value.

[0057] In one optional embodiment, when constructing the parameter mapping table, the measurement system can first obtain the test load value, test tire pressure value, and test temperature value corresponding to the test tire. The model of the test tire is the same as that of the target tire. Then, the measurement system can configure the initial test bench based on the test load value, test tire pressure value, and test temperature value to obtain the target test bench, and use the target test bench to measure the stiffness of the test tire to obtain the measured stiffness value. Finally, the measurement system can perform interpolation processing on the test load value, test tire pressure value, test temperature value, and stiffness measurement value to obtain interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value, and construct the parameter mapping table based on the test load value, test tire pressure value, test temperature value, measured stiffness value, interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value.

[0058] To facilitate understanding of the above content, Figure 2 This is a schematic diagram illustrating a tire stiffness measurement process according to an embodiment of this application, as shown below. Figure 2 As shown, in the process of real-time measurement of the tire stiffness of the target tire, the measurement system can first obtain the tire load, tire pressure and ambient temperature of the target tire, and then determine the stiffness that matches the tire load, tire pressure and ambient temperature by looking up a table, thus obtaining the tire stiffness.

[0059] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of the relevant data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0060] According to an embodiment of this application, a tire stiffness measuring device is provided. It should be noted that the device can be used to perform the above-described tire stiffness measuring method. Figure 3 This is a structural block diagram of a tire stiffness measuring device according to an embodiment of this application, as shown in the diagram. Figure 3 As shown, the device includes a data acquisition module 302 and a stiffness determination module 304.

[0061] The data acquisition module 302 is used to acquire the load data of the target tire on the vehicle and the environmental data of the current environment of the vehicle. The stiffness determination module 304 is used to determine the tire stiffness of the target tire based on the load data and environmental data using parameter mapping relationships. The parameter mapping relationships are used to characterize the correlation between load data, environmental data and tire stiffness. The parameter mapping relationships include: a first correlation relationship and a second correlation relationship. The first correlation relationship is used to characterize the correlation between load data, environmental data and tire stiffness obtained by testing the test data on the test bench. The second correlation relationship is used to characterize the correlation between load data, environmental data and tire stiffness obtained by interpolating the test data.

[0062] Furthermore, the load data includes: the tire load and tire pressure of the target tire, and the environmental data includes: the ambient temperature. The stiffness determination module is also used to: obtain a parameter mapping table, wherein the parameter mapping table is used to store the correlation between tire load, tire pressure, ambient temperature and tire stiffness; based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, the parameter mapping table is searched to obtain a stiffness search result, wherein the stiffness search result is used to characterize whether the parameter mapping table stores a first stiffness value corresponding to the first load value, the first tire pressure value and the first temperature value; in response to the stiffness search result indicating the existence of a first stiffness value, the first stiffness value is determined as the stiffness value of the tire stiffness.

[0063] Furthermore, the stiffness determination module is also used to: determine a second load value from a parameter mapping table based on a first load value, determine a second tire pressure value from a parameter mapping table based on a first tire pressure value, and determine a second temperature value from a parameter mapping table based on a first temperature value, wherein the difference between the second load value and the first load value is less than the difference between other load values ​​in the parameter mapping table and the first load value, the difference between the second tire pressure value and the first tire pressure value is less than the difference between other tire pressure values ​​in the parameter mapping table and the first tire pressure value, and the difference between the second temperature value and the first temperature value is less than the difference between other temperature values ​​in the parameter mapping table and the first temperature value; obtain a first difference between the first load value and the second load value, a second difference between the first tire pressure value and the second tire pressure value, and a third difference between the first temperature value and the second temperature value; in response to the first difference being less than or equal to a first threshold, the second difference being less than or equal to a second threshold, and the third difference being less than or equal to a third threshold, determine that the stiffness retrieval result indicates the existence of a first stiffness value, and determine the first stiffness value based on the second load value, the second tire pressure value, and the second temperature value.

[0064] Furthermore, the stiffness determination module is also used to: in response to a first difference being greater than a first threshold, or a second difference being greater than a second threshold, or a third difference being greater than a third threshold, obtain a third load value, a third tire pressure value, and a third temperature value, wherein the first load value is between the second load value and the third load value, the first tire pressure value is between the second tire pressure value and the third tire pressure value, and the first temperature value is between the second temperature value and the third temperature value; based on a parameter mapping table, obtain the second stiffness value corresponding to the second load value, the second tire pressure value, and the second temperature value, as well as the third stiffness value corresponding to the third load value, the third tire pressure value, and the third temperature value; input the first load value, the second load value, the third load value, the first tire pressure value, the second tire pressure value, the third tire pressure value, the first temperature value, the second temperature value, the third temperature value, the second stiffness value, and the third stiffness value into a numerical interpolation model, and use the numerical interpolation model to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value.

[0065] Furthermore, the stiffness determination module is also used to: obtain the first position of the first load value in the load value interval, the second position of the first tire pressure value in the tire pressure value interval, and the third position of the first temperature value in the temperature value interval, wherein the load value interval is composed of the second load value and the third load value, the tire pressure value interval is composed of the second tire pressure value and the third tire pressure value, and the temperature value interval is composed of the second temperature value and the third temperature value; process the first position, the second position, and the third position using a numerical interpolation model to obtain the weighted weight values ​​corresponding to the second stiffness value and the third stiffness value; and perform weighted processing on the second stiffness value and the third stiffness value based on the weighted weight values ​​to obtain the first stiffness value.

[0066] Furthermore, the first load value is sensed by a strain gauge load sensor, which is deployed on the vehicle's axle or suspension arm.

[0067] Furthermore, the data acquisition module is also used to: acquire the vehicle's total load value and the suspension acceleration; determine the initial load value of the target tire based on the tire position and total load value of the target tire; perform frequency domain integral displacement processing on the suspension acceleration to obtain the suspension displacement curve, wherein the displacement curve is used to reflect the current displacement change of the suspension; and adjust the initial load value based on the displacement curve to obtain the first load value.

[0068] Furthermore, the stiffness determination module is also used to: obtain the test load value, test tire pressure value, and test temperature value corresponding to the test tire, wherein the model of the test tire is the same as that of the target tire; configure the initial test bench based on the test load value, test tire pressure value, and test temperature value to obtain the target test bench; measure the stiffness of the test tire using the target test bench to obtain the measured stiffness value; perform interpolation processing on the test load value, test tire pressure value, test temperature value, and stiffness measurement value to obtain the interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value; and construct a parameter mapping table based on the test load value, test tire pressure value, test temperature value, measured stiffness value, interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value.

[0069] Embodiments of this application also provide a vehicle, including: a memory storing an executable program; and a processor for running the program, wherein the program executes the methods described in various embodiments of this application when it runs.

[0070] Embodiments of this application also provide a computer-readable storage medium including a stored executable program, wherein, when the executable program is running, it controls the device where the computer-readable storage medium is located to perform the methods of various embodiments of this application.

[0071] Embodiments of this application also provide a computer program product, including a computer program that, when executed by a processor, implements the methods of various embodiments of this application.

[0072] Embodiments of this application also provide a computer program product, including a non-volatile computer-readable storage medium for storing a computer program that, when executed by a processor, implements the methods in various embodiments of this application.

[0073] Embodiments of this application also provide a computer program that, when executed by a processor, implements the methods described in the various embodiments of this application.

[0074] In the above embodiments of this application, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0075] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0076] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0077] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0078] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as a USB flash drive, read-only memory (ROM), random access memory (RAM), portable hard drive, magnetic disk, or optical disk.

[0079] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A method for measuring tire stiffness, characterized in that, include: Obtain the load data of the target tires on the vehicle, as well as the environmental data of the current environment of the vehicle; Using parameter mapping relationships, the tire stiffness of the target tire is determined based on the load data and the environmental data. The parameter mapping relationships characterize the correlation between the load data, the environmental data, and the tire stiffness. The parameter mapping relationships include a first correlation and a second correlation. The first correlation characterizes the correlation between the load data, the environmental data, and the tire stiffness obtained through testing on a test bench using test data. The second correlation characterizes the correlation between the load data, the environmental data, and the tire stiffness obtained by interpolating the test data.

2. The method according to claim 1, characterized in that, The load data includes: the tire load and tire pressure of the target tire; the environmental data includes: the ambient temperature; using parameter mapping relationships, based on the load data and the environmental data, the tire stiffness of the target tire is determined, including: Obtain a parameter mapping table, wherein the parameter mapping table is used to store the correlation between the tire load, the tire pressure, the ambient temperature and the tire stiffness; Based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, the parameter mapping table is searched to obtain a stiffness search result. The stiffness search result is used to characterize whether the parameter mapping table stores a first stiffness value corresponding to the first load value, the first tire pressure value, and the first temperature value. In response to the stiffness retrieval result indicating the existence of the first stiffness value, the first stiffness value is determined as the stiffness value of the tire stiffness.

3. The method according to claim 2, characterized in that, Based on the first load value corresponding to the tire load, the first tire pressure value corresponding to the tire pressure, and the first temperature value corresponding to the ambient temperature, the parameter mapping table is searched to obtain stiffness search results, including: Based on the first load value, a second load value is determined from the parameter mapping table; based on the first tire pressure value, a second tire pressure value is determined from the parameter mapping table; and based on the first temperature value, a second temperature value is determined from the parameter mapping table. The difference between the second load value and the first load value is less than the difference between other load values ​​in the parameter mapping table and the first load value; the difference between the second tire pressure value and the first tire pressure value is less than the difference between other tire pressure values ​​in the parameter mapping table and the first tire pressure value; and the difference between the second temperature value and the first temperature value is less than the difference between other temperature values ​​in the parameter mapping table and the first temperature value. Obtain a first difference between the first load value and the second load value, a second difference between the first tire pressure value and the second tire pressure value, and a third difference between the first temperature value and the second temperature value; In response to the first difference being less than or equal to a first threshold, the second difference being less than or equal to a second threshold, and the third difference being less than or equal to a third threshold, the stiffness retrieval result is determined to be the existence of the first stiffness value, and the first stiffness value is determined based on the second load value, the second tire pressure value, and the second temperature value.

4. The method according to claim 3, characterized in that, The method further includes: In response to the first difference being greater than the first threshold, or the second difference being greater than the second threshold, or the third difference being greater than the third threshold, a third load value, a third tire pressure value, and a third temperature value are obtained, wherein the first load value is between the second load value and the third load value, the first tire pressure value is between the second tire pressure value and the third tire pressure value, and the first temperature value is between the second temperature value and the third temperature value; Based on the parameter mapping table, obtain the second stiffness value corresponding to the second load value, the second tire pressure value, and the second temperature value, as well as the third stiffness value corresponding to the third load value, the third tire pressure value, and the third temperature value; The first load value, the second load value, the third load value, the first tire pressure value, the second tire pressure value, the third tire pressure value, the first temperature value, the second temperature value, the third temperature value, the second stiffness value, and the third stiffness value are input into the numerical interpolation model. The numerical interpolation model is used to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value.

5. The method according to claim 4, characterized in that, The first load value, the second load value, the third load value, the first tire pressure value, the second tire pressure value, the third tire pressure value, the first temperature value, the second temperature value, the third temperature value, the second stiffness value, and the third stiffness value are input into a numerical interpolation model. The numerical interpolation model is used to interpolate the second stiffness value and the third stiffness value to obtain the first stiffness value, including: The first position of the first load value in the load value range, the second position of the first tire pressure value in the tire pressure value range, and the third position of the first temperature value in the temperature value range are obtained, wherein the load value range is composed of the second load value and the third load value, the tire pressure value range is composed of the second tire pressure value and the third tire pressure value, and the temperature value range is composed of the second temperature value and the third temperature value; The numerical interpolation model is used to process the first position, the second position, and the third position to obtain the weighted values ​​corresponding to the second stiffness value and the third stiffness value; The second stiffness value and the third stiffness value are weighted based on the weighted values ​​to obtain the first stiffness value.

6. The method according to claim 2, characterized in that, The first load value is obtained by a strain gauge load sensor, which is deployed on the axle or suspension arm of the vehicle.

7. The method according to claim 6, characterized in that, In response to the absence of the strain-type load sensor on the axle or the suspension arm, the method further includes: Obtain the vehicle's total load value and the suspension acceleration of the suspension; Based on the tire position of the target tire and the vehicle load value, the initial load value of the target tire is determined; The suspension acceleration is subjected to frequency domain integral displacement processing to obtain the suspension displacement curve, wherein the displacement curve is used to reflect the current displacement change of the suspension; The initial load value is adjusted based on the displacement curve to obtain the first load value.

8. The method according to claim 2, characterized in that, The method further includes: Obtain the test load value, test tire pressure value, and test temperature value corresponding to the test tire, wherein the model of the test tire is the same as the model of the target tire; The initial test bench is configured based on the test load value, the test tire pressure value, and the test temperature value to obtain the target test bench; The stiffness of the test tire is measured using the target test bench to obtain the measured stiffness value; The test load value, the test tire pressure value, the test temperature value, and the stiffness measurement value are interpolated to obtain interpolated load value, interpolated tire pressure value, interpolated temperature value, and interpolated stiffness value. The parameter mapping table is constructed based on the test load value, the test tire pressure value, the test temperature value, the measured stiffness value, the interpolated load value, the interpolated tire pressure value, the interpolated temperature value, and the interpolated stiffness value.

9. A vehicle, characterized in that, include: Memory, which stores executable programs; A processor for running the program, wherein the program, when running, performs the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored executable program, wherein, when the executable program is executed, it controls the device on which the storage medium is located to perform the method according to any one of claims 1 to 8.

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