A tire wear capability evaluation method, device, terminal and storage medium

Abstract

The application discloses a kind of tire wear capability evaluation method, device, terminal and storage medium, belong to the test technical field of tire wear, comprising: when receiving tire wear capability evaluation request data, obtain the tire wear capability evaluation request data in 30m and 50m circumference driving test mileage data respectively obtained according to test requirement in fixed circle wear test;According to the 30m and 50m circumference driving test mileage data, 30m and 50m circumference driving test mileage average and 30 and 50m circumference driving test mileage standard deviation value are obtained respectively;According to the 30m and 50m circumference driving test mileage average and 30m and 50m circumference driving test mileage standard deviation value, tire wear capability evaluation is carried out.The application is carried out in the fixed circle square of whole vehicle test field, and the actual pavement wear test is carried out by loading whole vehicle, and the test is carried out by using test sample car, tire sample and test pavement, which is consistent with the actual situation to the greatest extent, to ensure the effectiveness of test result.

Description

Technical Field

[0001] This invention discloses a method, device, terminal, and storage medium for evaluating tire wear capacity, belonging to the field of tire wear testing technology. Background Technology

[0002] For vehicles traveling on modern highways, the primary control and disturbance forces, aside from aerodynamic forces, originate from the contact area between the tires and the road surface. Hence the saying: "The key control forces determining how a car steers, brakes, and accelerates are generated in four contact areas no larger than the palm of a human hand," a statement that suffices to illustrate the importance of tires. With the increasing number of cars on the road in China, users are paying more and more attention to tire wear performance, which affects the cost of replacement aftermarket.

[0003] During tire development, OEMs use Akron testing machines on test benches to test the wear performance of the tread compound. However, this method cannot be directly compared to real vehicles. First, it only uses the tread compound, and the test object is different from the tire. Second, the road surface is significantly different from the actual road surface. Vehicle-specific wear tests are conducted, following a fixed wear route. The test results are then processed to evaluate the tire's wear resistance. Moreover, vehicle tests are conducted after tire development is completed. First, if the wear performance does not meet the requirements, wear performance optimization is needed, and the tire also needs to be recalibrated for NVH, dynamics, and braking performance, which seriously affects the vehicle project milestones. Second, the testing cycle is long and the testing cost is high. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention proposes a method, device, terminal, and storage medium for evaluating tire wear performance. This solves the problems of current bench testing of tire wear performance, which suffers from inconsistencies between the test object and the actual vehicle, and significant differences between the road surface and the actual road surface. Furthermore, dedicated wear testing for whole vehicles suffers from development node risks, long testing cycles, and high costs due to substandard wear performance.

[0005] The technical solution of the present invention is as follows:

[0006] According to a first aspect of the present invention, a method for evaluating tire wear resistance is provided, comprising:

[0007] When a tire wear capability evaluation request data is received, the tire wear capability evaluation request data is obtained from the tire wear capability evaluation request data, and the driving test mileage data on a 30m and 50m circle is obtained respectively according to the test requirements of the fixed circle wear test.

[0008] Based on the test mileage data of the 30m and 50m circles, the average test mileage of the 30m and 50m circles and the standard deviation of the test mileage of the 30m and 50m circles are obtained respectively.

[0009] The tire wear capacity is evaluated based on the average mileage of the 30m and 50m circular driving test mileage and the standard deviation of the 30m and 50m circular driving test mileage.

[0010] Preferably, the test requirements include:

[0011] The test requirements include: the test should be stopped when the temperature is below 7°C, the road surface is frosty or covered with snow, the road surface water film thickness is ≥5mm due to heavy rain, or the visibility is ≤100m due to heavy fog.

[0012] Vehicle load distribution includes: the weight of each seating area of ​​the test vehicle should be evenly distributed according to the design load;

[0013] Vehicle condition confirmation includes: preparing the vehicle as required, adjusting the four-wheel alignment parameters and tire pressure to the design values, and ensuring the wheel assembly is dynamically balanced.

[0014] The driving route includes: drawing circles with radii of 30m and 50m respectively in white paint on the test site's circular plaza.

[0015] Vehicle speed, including: maneuvering the vehicle along a circle with a radius of 30m, adjusting the speed to achieve a lateral acceleration of (4.5±0.2) m / s². 2 Record the vehicle speed at this time, and similarly determine the corresponding vehicle speed when testing on a circle with a radius of 50m.

[0016] Preferably, the fixed-circle wear test includes:

[0017] 30m circumferential fixed-circle wear test:

[0018] Maintain the lateral acceleration of the entire vehicle at (4.5±0.2) m / s². 2 The vehicle travels at a constant speed around a fixed circle;

[0019] The test was stopped when the tires wore down to the tread wear indicator, and the lateral acceleration of the entire vehicle was recorded as (4.5±0.2) m / s². 2 The first test mileage until the test stops;

[0020] Replace with new tire samples and repeat the above two steps 5 times, recording the second, third, fourth, fifth, and sixth test mileages respectively;

[0021] The 50m circumferential fixed-circumferential wear test follows the same procedure as the 30m circumferential fixed-circumferential wear test, yielding the seventh, eighth, ninth, tenth, eleventh, and twelfth test mileages respectively.

[0022] Preferably, the step of obtaining the average driving test mileage on the 30m and 50m circles based on the driving test mileage data on the 30m and 50m circles respectively includes:

[0023] The test mileage data for the 30m and 50m circumference were obtained by formulas (1) and (2) to obtain the average test mileage for the 30m and 50m circumference respectively:

[0024]

[0025]

[0026] Wherein: S 30avg S is the average distance traveled during a 30m circular test. 50avg The average distance traveled on a 50m circle during the test is represented by S1-S6, which are the first, second, third, fourth, fifth, and sixth test distances, respectively. S7-S... 12 These are the seventh, eighth, ninth, tenth, eleventh, and twelfth test mileages, respectively.

[0027] Preferably, the step of obtaining the standard deviation values ​​of the 30m and 50m circumferential test mileage based on the 30m and 50m circumferential test mileage data respectively includes:

[0028] The test mileage data for the 30m and 50m circumference driving tests were obtained through (3) and (4) to obtain the standard deviation values ​​of the test mileage for the 30m and 50m circumference driving tests, respectively:

[0029]

[0030]

[0031] Wherein: S 30log S represents the standard deviation of the test mileage traveled on a 30m circle. 50log The standard deviation of the test mileage on a 50m circle.

[0032] Preferably, the evaluation of tire wear capacity based on the average value of the 30m and 50m circumferential test mileage and the standard deviation of the 30m and 50m circumferential test mileage includes:

[0033] The average value of the test mileage on the 30m and 50m circumference and the standard deviation value of the test mileage on the 30m and 50m circumference are used to determine the comprehensive evaluation score of tire wear performance through formula (5):

[0034] M = a × S 30avg+b×S 50avg +c×S 30log +d×S 50log (5)

[0035] Where: a and b are the influence factors of the average test mileage traveled on a 30m and 50m circle, respectively; c and d are the influence factors of the standard deviation of the test mileage traveled on a 30m and 50m circle, respectively; and M is the comprehensive evaluation score of tire wear performance.

[0036] The evaluation result of tire wear performance is obtained by determining whether the comprehensive evaluation score of the tire wear performance meets the internal control standard threshold.

[0037] According to a second aspect of the present invention, a tire wear capability evaluation device is provided, comprising:

[0038] The acquisition module is used to acquire, when receiving tire wear capability evaluation request data, the mileage data of driving on a 30m and 50m circle respectively obtained from the fixed circle wear test according to the test requirements in the tire wear capability evaluation request data;

[0039] The calculation module is used to obtain the average value of the driving test mileage on the 30m and 50m circles and the standard deviation value of the driving test mileage on the 30m and 50m circles, respectively, based on the driving test mileage data on the 30m and 50m circles.

[0040] The evaluation module is used to evaluate tire wear capacity based on the average mileage of the 30m and 50m circumferential driving test mileage and the standard deviation of the 30m and 50m circumferential driving test mileage.

[0041] Preferably, the evaluation module is further used for:

[0042] The average value of the test mileage on the 30m and 50m circumference and the standard deviation value of the test mileage on the 30m and 50m circumference are used to determine the comprehensive evaluation score of tire wear performance through formula (5):

[0043] M = a × S 30avg +b×S 50avg +c×S 30log +d×S 50log (5)

[0044] Where: a and b are the influence factors of the average test mileage traveled on a 30m and 50m circle, respectively; c and d are the influence factors of the standard deviation of the test mileage traveled on a 30m and 50m circle, respectively; and M is the comprehensive evaluation score of tire wear performance.

[0045] The evaluation result of tire wear performance is obtained by determining whether the comprehensive evaluation score of the tire wear performance meets the internal control standard threshold.

[0046] According to a third aspect of the present invention, a terminal is provided, comprising:

[0047] One or more processors;

[0048] Memory for storing the one or more processor-executable instructions;

[0049] Wherein, the one or more processors are configured as follows:

[0050] Perform the method described in the first aspect of the embodiments of the present invention.

[0051] According to a fourth aspect of the present invention, a non-transitory computer-readable storage medium is provided, wherein when instructions in the storage medium are executed by a processor of a terminal, the terminal is enabled to perform the method described in the first aspect of the present invention.

[0052] According to a fifth aspect of the present invention, an application product is provided that, when the application product is running on a terminal, causes the terminal to execute the method described in the first aspect of the present invention.

[0053] The beneficial effects of this invention are as follows:

[0054] This invention provides a method, device, terminal, and storage medium for evaluating tire wear performance. In a circular plaza at a vehicle proving ground, a complete vehicle is mounted to conduct wear tests on actual road surfaces. First, tests are conducted using a test vehicle, tire samples, and a test road surface to maximize consistency with real-world conditions and ensure the validity of the test results. Second, this test can be conducted early in the project's development, ensuring that the tire's wear performance meets the vehicle's requirements in advance. This reduces the project development cycle risk caused by substandard tire wear performance after the vehicle wear test, and significantly reduces the testing cycle and costs.

[0055] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0056] Figure 1 This is a flowchart illustrating a method for evaluating tire wear capacity according to an exemplary embodiment;

[0057] Figure 2 This is a schematic block diagram illustrating the structure of a tire wear capability evaluation device according to an exemplary embodiment;

[0058] Figure 3This is a schematic block diagram of a terminal structure according to an exemplary embodiment. Detailed Implementation

[0059] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0060] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0061] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0062] This invention provides a method for evaluating tire wear capacity. This method is implemented by a terminal, which can be a smartphone, desktop computer, or laptop computer, etc., and the terminal includes at least a CPU.

[0063] Example 1

[0064] Figure 1 This is a flowchart illustrating a tire wear capability evaluation method according to an exemplary embodiment. The method is used in a terminal and includes the following steps:

[0065] Step 101: When the tire wear capability evaluation request data is received, the tire wear capability evaluation request data is used to obtain the 30m and 50m circumference driving test mileage data obtained from the fixed circle wear test according to the test requirements. The specific content is as follows:

[0066] The test requirements include:

[0067] 1. Weather requirements

[0068] The test should be stopped when the temperature is below 7℃, the road surface is frosty or covered with snow, the road surface water film thickness is ≥5mm due to heavy rain, or the visibility is ≤100m due to heavy fog.

[0069] 2. Vehicle loading

[0070] The seating areas of the test vehicle should be evenly weighted according to the design load to ensure that the left and right wheel loads are equal when the driver is in the vehicle.

[0071] 3. Vehicle condition confirmation

[0072] Perform vehicle preparation as required, adjusting four-wheel alignment parameters and tire pressure to design values, and ensuring dynamic balancing of the wheel assembly. Install data acquisition and recording equipment for tire road wear testing.

[0073] 3. Driving route

[0074] On the test site's circular plaza, circles with radii of 30m and 50m were drawn with white paint.

[0075] 4. Vehicle speed

[0076] Maneuver the vehicle along a circle with a radius of 30m, adjusting the speed to achieve a lateral acceleration of (4.5 ± 0.2) m / s². 2 Record the vehicle speed at this time, and similarly determine the corresponding vehicle speed when testing on a circle with a radius of 50m.

[0077] The fixed-circle wear test includes:

[0078] 30m circumferential fixed circle wear test

[0079] A wear test was conducted on a circle with a radius of 30m, maintaining the vehicle speed determined by the above test method while driving around the circle. The test stopped when the tires wore down to the tire tread wear mark. During this process, the lateral acceleration of the entire vehicle was recorded as (4.5±0.2) m / s². 2 The test ended at the first test mileage S1. New tire samples were installed, and the test was repeated five times, recording the vehicle's lateral acceleration as (4.5 ± 0.2) m / s². 2 The test mileages S2, S3, S4, S5, and S6 at the end of the test.

[0080] 50m circumferential fixed circle wear test

[0081] Following the test method conducted on a 30m radius circle, six cycles of wear tests around a fixed circle were repeated on a 50m radius circle, and the lateral acceleration of the entire vehicle was recorded to reach (4.5±0.2) m / s². 2Test mileage at time: seventh test mileage S7, eighth test mileage S8, ninth test mileage S9, tenth test mileage S 10 And the eleventh test mileage S 11 and the twelfth test mileage S 12 .

[0082] Therefore, when a tire wear capability evaluation request data is received, the system retrieves the 30m and 50m circumferential test mileage data obtained from the tire wear capability evaluation request data based on the aforementioned test requirements during a fixed-circumference wear test. The 30m and 50m circumferential test mileage data include: first test mileage S1, second test mileage S2, third test mileage S3, fourth test mileage S4, fifth test mileage S5, sixth test mileage S6, seventh test mileage S7, eighth test mileage S8, ninth test mileage S9, and tenth test mileage S1. 10 And the eleventh test mileage S 11 and the twelfth test mileage S 12 .

[0083] Step 102: Based on the test mileage data from the 30m and 50m circumferences, obtain the average test mileage values ​​for the 30m and 50m circumferences and the standard deviation values ​​for the test mileage values ​​for the 30m and 50m circumferences, respectively. The specific details are as follows:

[0084] The average test mileage data for driving on a 30m and 50m circle were obtained using formulas (1) and (2), respectively:

[0085]

[0086]

[0087] Wherein: S 30avg S is the average distance traveled during a 30m circular test. 50avg The average distance traveled during the test on a 50m circle.

[0088] The test mileage data for 30m and 50m circumference driving were obtained through (3) and (4), respectively, and the standard deviation values ​​of the test mileage for 30m and 50m circumference driving were obtained:

[0089]

[0090]

[0091] Wherein: S 30log S represents the standard deviation of the test mileage traveled on a 30m circle. 50log The standard deviation of the test mileage on a 50m circle.

[0092] Step 103, the tire wear capacity is evaluated based on the average value of the 30m and 50m circumferential test mileage and the standard deviation of the 30m and 50m circumferential test mileage. The specific content is as follows:

[0093] The average test mileage over 30m and 50m circumferences and the standard deviation of the test mileage over 30m and 50m circumferences are used to determine the comprehensive evaluation score of tire wear performance using formula (5):

[0094] M = a × S 30avg +b×S 50avg +c×S 30log +d×S 50log (5)

[0095] Where: a and b are the influence factors of the average test mileage traveled on a 30m and 50m circle, respectively; c and d are the influence factors of the standard deviation of the test mileage traveled on a 30m and 50m circle, respectively; and M is the comprehensive evaluation score of tire wear performance.

[0096] The evaluation result of tire wear performance is obtained by determining whether the comprehensive evaluation score of the tire wear performance meets the internal control standard threshold.

[0097] Taking the tire wear test of a certain project as an example, as shown in Table 1 below, the comprehensive evaluation score of tire wear performance is 13.928, which meets the internal control standard threshold (not lower than 13.5), and the wear performance is qualified.

[0098] Table 1 Tire Wear Test Data

[0099]

[0100] This invention utilizes a circular plaza at a vehicle proving ground to conduct wear tests on actual road surfaces using a complete vehicle. Firstly, it employs a test vehicle, tire samples, and a test road surface to ensure maximum consistency with real-world conditions and guarantee the validity of the test results. Secondly, this test can be conducted early in the project's development, ensuring that the tire's wear performance meets the vehicle's requirements in advance. This reduces the project development cycle risk caused by substandard tire wear performance after the vehicle wear test, and significantly reduces the testing cycle and costs.

[0101] Example 2

[0102] In an exemplary embodiment, a tire wear capability evaluation device is also provided, characterized in that it includes:

[0103] The acquisition module 210 is used to acquire, when receiving tire wear capability evaluation request data, the mileage data of driving on a 30m and 50m circle respectively obtained from the fixed circle wear test according to the test requirements in the tire wear capability evaluation request data;

[0104] The calculation module 220 is used to obtain the average value of the driving test mileage on the 30m and 50m circles and the standard deviation value of the driving test mileage on the 30m and 50m circles, respectively, based on the driving test mileage data on the 30m and 50m circles.

[0105] Evaluation module 230 is used to evaluate tire wear capacity based on the average value of the test mileage on the 30m and 50m circumference and the standard deviation value of the test mileage on the 30m and 50m circumference.

[0106] Preferably, the evaluation module 230 is also used for:

[0107] The average value of the test mileage on the 30m and 50m circumference and the standard deviation value of the test mileage on the 30m and 50m circumference are used to determine the comprehensive evaluation score of tire wear performance through formula (5):

[0108] M = a × S 30avg +b×S 50avg +c×S 30log +d×S 50log (5)

[0109] Where: a and b are the influence factors of the average test mileage traveled on a 30m and 50m circle, respectively; c and d are the influence factors of the standard deviation of the test mileage traveled on a 30m and 50m circle, respectively; and M is the comprehensive evaluation score of tire wear performance.

[0110] The evaluation result of tire wear performance is obtained by determining whether the comprehensive evaluation score of the tire wear performance meets the internal control standard threshold.

[0111] This invention utilizes a circular plaza at a vehicle proving ground to conduct wear tests on actual road surfaces using a complete vehicle. Firstly, it employs a test vehicle, tire samples, and a test road surface to ensure maximum consistency with real-world conditions and guarantee the validity of the test results. Secondly, this test can be conducted early in the project's development, ensuring that the tire's wear performance meets the vehicle's requirements in advance. This reduces the project development cycle risk caused by substandard tire wear performance after the vehicle wear test, and significantly reduces the testing cycle and costs.

[0112] Example 3

[0113] Figure 3This is a structural block diagram of a terminal provided in an embodiment of this application. The terminal can be the terminal in the above embodiments. The terminal 300 can be a portable mobile terminal, such as a smartphone or tablet computer. The terminal 300 may also be referred to as user equipment, portable terminal, or other names.

[0114] Typically, terminal 300 includes a processor 301 and a memory 302.

[0115] Processor 301 may include one or more processing cores, such as a quad-core processor or an octa-core processor. Processor 301 may be implemented using at least one hardware form selected from DSP (Digital Signal Processing), FPGA (Field-Programmable Gate Array), and PLA (Programmable Logic Array). Processor 301 may also include a main processor and a coprocessor. The main processor, also known as a CPU (Central Processing Unit), is used to process data in the wake-up state; the coprocessor is a low-power processor used to process data in the standby state. In some embodiments, processor 301 may integrate a GPU (Graphics Processing Unit), which is responsible for rendering and drawing the content to be displayed on the screen. In some embodiments, processor 301 may also include an AI (Artificial Intelligence) processor, which is used to handle computational operations related to machine learning.

[0116] The memory 302 may include one or more computer-readable storage media, which may be tangible and non-transitory. The memory 302 may also include high-speed random access memory and non-volatile memory, such as one or more disk storage devices or flash memory devices. In some embodiments, the non-transitory computer-readable storage media in the memory 302 are used to store at least one instruction, which is executed by the processor 301 to implement a tire wear capability evaluation method provided in this application.

[0117] In some embodiments, the terminal 300 may also optionally include: a peripheral device interface 303 and at least one peripheral device. Specifically, the peripheral device includes at least one of: a radio frequency circuit 304, a touch display screen 305, a camera 306, an audio circuit 307, a positioning component 308, and a power supply 309.

[0118] The peripheral device interface 303 can be used to connect at least one I / O (Input / Output) related peripheral device to the processor 301 and the memory 302. In some embodiments, the processor 301, memory 302, and peripheral device interface 303 are integrated on the same chip or circuit board; in some other embodiments, any one or two of the processor 301, memory 302, and peripheral device interface 303 can be implemented on separate chips or circuit boards, which is not limited in this embodiment.

[0119] The radio frequency (RF) circuit 304 is used to receive and transmit RF (Radio Frequency) signals, also known as electromagnetic signals. The RF circuit 304 communicates with communication networks and other communication devices via electromagnetic signals. The RF circuit 304 converts electrical signals into electromagnetic signals for transmission, or converts received electromagnetic signals back into electrical signals. Optionally, the RF circuit 304 includes: an antenna system, an RF transceiver, one or more amplifiers, a tuner, an oscillator, a digital signal processor, a codec chipset, a user identity module card, etc. The RF circuit 304 can communicate with other terminals through at least one wireless communication protocol. This wireless communication protocol includes, but is not limited to: the World Wide Web, metropolitan area networks, intranets, various generations of mobile communication networks (2G, 3G, 4G, and 5G), wireless local area networks, and / or WiFi (Wireless Fidelity) networks. In some embodiments, the RF circuit 304 may also include circuitry related to NFC (Near Field Communication), which is not limited in this application.

[0120] The touch display screen 305 is used to display a UI (User Interface). This UI may include graphics, text, icons, videos, and any combination thereof. The touch display screen 305 also has the ability to collect touch signals on or above its surface. These touch signals can be input as control signals to the processor 301 for processing. The touch display screen 305 is used to provide virtual buttons and / or a virtual keyboard, also known as soft buttons and / or a soft keyboard. In some embodiments, there may be one touch display screen 305, which is located on the front panel of the terminal 300; in other embodiments, there may be at least two touch display screens, respectively located on different surfaces of the terminal 300 or in a folded design; in still other embodiments, the touch display screen 305 may be a flexible display screen, located on a curved or folded surface of the terminal 300. Furthermore, the touch display screen 305 may be configured as a non-rectangular, irregular shape, i.e., a non-rectangular screen. The touch display screen 305 may be made of materials such as LCD (Liquid Crystal Display) or OLED (Organic Light-Emitting Diode).

[0121] Camera assembly 306 is used to acquire images or videos. Optionally, camera assembly 306 includes a front-facing camera and a rear-facing camera. Typically, the front-facing camera is used for video calls or selfies, and the rear-facing camera is used for taking photos or videos. In some embodiments, there are at least two rear-facing cameras, which are any one of a main camera, a depth-sensing camera, and a wide-angle camera, to achieve background blurring by fusion of the main camera and the depth-sensing camera, and panoramic shooting and VR (Virtual Reality) shooting by fusion of the main camera and the wide-angle camera. In some embodiments, camera assembly 306 may also include a flash. The flash can be a single-color temperature flash or a dual-color temperature flash. A dual-color temperature flash is a combination of a warm light flash and a cool light flash, which can be used for light compensation at different color temperatures.

[0122] Audio circuit 307 provides an audio interface between the user and terminal 300. Audio circuit 307 may include a microphone and a speaker. The microphone is used to collect sound waves from the user and the environment, converting the sound waves into electrical signals that are input to processor 301 for processing, or input to radio frequency circuit 304 for voice communication. For stereo sound acquisition or noise reduction purposes, multiple microphones may be used, each located at a different part of terminal 300. The microphone may also be an array microphone or an omnidirectional microphone. The speaker is used to convert electrical signals from processor 301 or radio frequency circuit 304 into sound waves. The speaker may be a conventional diaphragm speaker or a piezoelectric ceramic speaker. When the speaker is a piezoelectric ceramic speaker, it can convert electrical signals not only into audible sound waves but also into inaudible sound waves for purposes such as distance measurement. In some embodiments, audio circuit 307 may also include a headphone jack.

[0123] The positioning component 308 is used to determine the current geographic location of the terminal 300 in order to enable navigation or LBS (Location Based Service). The positioning component 308 can be a positioning component based on the US GPS (Global Positioning System), China's BeiDou system, or Russia's Galileo system.

[0124] The power supply 309 is used to power the various components in the terminal 300. The power supply 309 can be AC ​​power, DC power, a disposable battery, or a rechargeable battery. When the power supply 309 includes a rechargeable battery, the rechargeable battery can be a wired rechargeable battery or a wireless rechargeable battery. A wired rechargeable battery is a battery that is charged via a wired connection, while a wireless rechargeable battery is a battery that is charged via a wireless coil. The rechargeable battery can also be used to support fast charging technology.

[0125] In some embodiments, the terminal 300 further includes one or more sensors 310. The one or more sensors 310 include, but are not limited to: an accelerometer 311, a gyroscope 312, a pressure sensor 313, a fingerprint sensor 314, an optical sensor 315, and a proximity sensor 316.

[0126] Accelerometer 311 can detect the magnitude of acceleration along the three coordinate axes of a coordinate system established with terminal 300. For example, accelerometer 311 can be used to detect the components of gravitational acceleration along the three coordinate axes. Processor 301 can control touchscreen 305 to display the user interface in landscape or portrait view based on the gravitational acceleration signal acquired by accelerometer 311. Accelerometer 311 can also be used for games or for acquiring user motion data.

[0127] The gyroscope sensor 312 can detect the orientation and rotation angle of the terminal 300. The gyroscope sensor 312, in conjunction with the accelerometer sensor 311, can collect the user's 3D (3D) movements on the terminal 300. Based on the data collected by the gyroscope sensor 312, the processor 301 can perform the following functions: motion sensing (e.g., changing the UI based on the user's tilt), image stabilization during shooting, game control, and inertial navigation.

[0128] The pressure sensor 313 can be disposed on the side bezel of the terminal 300 and / or on the lower layer of the touch display screen 305. When the pressure sensor 313 is disposed on the side bezel of the terminal 300, it can detect the user's grip signal on the terminal 300 and perform left / right hand recognition or quick operation based on the grip signal. When the pressure sensor 313 is disposed on the lower layer of the touch display screen 305, it can control the operable controls on the UI interface based on the user's pressure operation on the touch display screen 305. The operable controls include at least one of button controls, scroll bar controls, icon controls, and menu controls.

[0129] The fingerprint sensor 314 is used to collect a user's fingerprint to identify the user's identity. When the user's identity is identified as trusted, the processor 301 authorizes the user to perform relevant sensitive operations, including unlocking the screen, viewing encrypted information, downloading software, making payments, and changing settings. The fingerprint sensor 314 can be located on the front, back, or side of the terminal 300. When the terminal 300 has physical buttons or a manufacturer's logo, the fingerprint sensor 314 can be integrated with the physical buttons or manufacturer's logo.

[0130] An optical sensor 315 is used to collect ambient light intensity. In one embodiment, the processor 301 can control the display brightness of the touch screen 305 based on the ambient light intensity collected by the optical sensor 315. Specifically, when the ambient light intensity is high, the display brightness of the touch screen 305 is increased; when the ambient light intensity is low, the display brightness of the touch screen 305 is decreased. In another embodiment, the processor 301 can also dynamically adjust the shooting parameters of the camera assembly 306 based on the ambient light intensity collected by the optical sensor 315.

[0131] The proximity sensor 316, also known as a distance sensor, is typically located on the front of the terminal 300. The proximity sensor 316 is used to detect the distance between the user and the front of the terminal 300. In one embodiment, when the proximity sensor 316 detects that the distance between the user and the front of the terminal 300 is gradually decreasing, the processor 301 controls the touchscreen display 305 to switch from a screen-on state to a screen-off state; when the proximity sensor 316 detects that the distance between the user and the front of the terminal 300 is gradually increasing, the processor 301 controls the touchscreen display 305 to switch from a screen-off state to a screen-on state.

[0132] Those skilled in the art will understand that Figure 3 The structure shown does not constitute a limitation on terminal 300, and may include more or fewer components than shown, or combine certain components, or use different component arrangements.

[0133] Example 4

[0134] In an exemplary embodiment, a computer-readable storage medium is also provided, on which a computer program is stored, which, when executed by a processor, implements a tire wear capability evaluation method as provided in all embodiments of the present application.

[0135] Any combination of one or more computer-readable media may be used. A computer-readable medium can be a computer-readable signal medium or a computer-readable storage medium. A computer-readable storage medium can be, for example—but not limited to—an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples (a non-exhaustive list) of computer-readable storage media include: an electrical connection having one or more wires, a portable computer disk, a hard disk, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fiber, portable compact disk read-only memory (CD-ROM), optical storage device, magnetic storage device, or any suitable combination thereof. In this document, a computer-readable storage medium can be any tangible medium that contains or stores a program that can be used by or in connection with an instruction execution system, apparatus, or device.

[0136] Computer-readable signal media may include data signals propagated in baseband or as part of a carrier wave, carrying computer-readable program code. Such propagated data signals may take various forms, including—but not limited to—electromagnetic signals, optical signals, or any suitable combination thereof. Computer-readable signal media may also be any computer-readable medium other than computer-readable storage media, capable of transmitting, propagating, or transmitting programs for use by or in connection with an instruction execution system, apparatus, or device.

[0137] The program code contained on a computer-readable medium may be transmitted using any suitable medium, including—but not limited to—wireless, wire, optical fiber, RF, etc., or any suitable combination thereof.

[0138] Computer program code for performing the operations of this invention can be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages ​​such as Java, Smalltalk, and C++, as well as conventional procedural programming languages ​​such as "C" or similar programming languages. The program code can be executed entirely on the user's computer, partially on the user's computer, as a standalone software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In cases involving remote computers, the remote computer can be connected to the user's computer via any type of network—including a local area network (LAN) or a wide area network (WAN)—or can be connected to an external computer (e.g., via the Internet using an Internet service provider).

[0139] Example 5

[0140] In an exemplary embodiment, an application product is also provided, including one or more instructions that can be executed by the processor 301 of the aforementioned device to complete the aforementioned tire wear capability evaluation method.

[0141] Although embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and embodiments. It can be applied to various fields suitable for the present invention. Other modifications can be readily made by those skilled in the art. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and examples shown and described herein.

Claims

1. A method for evaluating tire wear resistance, characterized in that, include: When a tire wear capability evaluation request data is received, the tire wear capability evaluation request data is obtained from the tire wear capability evaluation request data, and the driving test mileage data on a 30m and 50m circle is obtained respectively according to the test requirements of the fixed circle wear test. Based on the test mileage data of the 30m and 50m circles, the average test mileage of the 30m and 50m circles and the standard deviation of the test mileage of the 30m and 50m circles are obtained respectively. Tire wear resistance is evaluated based on the average mileage of the 30m and 50m circular driving test mileage and the standard deviation of the 30m and 50m circular driving test mileage. The fixed-circle wear test includes: 30m circumferential wear test: Maintain a vehicle speed of (4.5±0.2) m / s² while driving around a fixed circle; When the tires wear down to the tire tread wear mark, the test is stopped and the first test mileage from when the vehicle's lateral acceleration reaches (4.5±0.2) m / s2 to when the test stops is recorded. Replace with new tire samples and repeat the above two steps 5 times, recording the second, third, fourth, fifth, and sixth test mileages respectively; The 50m circumferential fixed circle wear test follows the same procedure as the 30m circumferential fixed circle wear test, respectively obtaining the seventh test mileage, the eighth test mileage, the ninth test mileage, the tenth test mileage, the eleventh test mileage, and the twelfth test mileage; The evaluation of tire wear capacity based on the average value of the 30m and 50m circular test mileage and the standard deviation of the 30m and 50m circular test mileage includes: The average value of the test mileage on the 30m and 50m circumference and the standard deviation value of the test mileage on the 30m and 50m circumference are used to determine the comprehensive evaluation score of tire wear performance through formula (5): M=a×S30avg+b×S50avg+c×S30log+d×S50log (1) Where: a and b are the influence factors of the average test mileage on a 30m and 50m circle, respectively; c and d are the influence factors of the standard deviation of the test mileage on a 30m and 50m circle, respectively; M is the comprehensive evaluation score of tire wear performance; S30avg is the average test mileage on a 30m circle; S50avg is the average test mileage on a 50m circle; S30log is the standard deviation of the test mileage on a 30m circle; and S50log is the standard deviation of the test mileage on a 50m circle. The evaluation result of tire wear performance is obtained by determining whether the comprehensive evaluation score of the tire wear performance meets the internal control standard threshold.

2. The method for evaluating tire wear capacity according to claim 1, characterized in that, The test requirements include: The test requirements include: the test should be stopped when the temperature is below 7°C, the road surface is frosty or covered with snow, the road surface water film thickness is ≥5mm due to heavy rain, or the visibility is ≤100m due to heavy fog. Vehicle load distribution includes: the weight of each seating area of ​​the test vehicle should be evenly distributed according to the design load; Vehicle condition confirmation includes: preparing the vehicle as required, adjusting the four-wheel alignment parameters and tire pressure to the design values, and ensuring the wheel assembly is dynamically balanced. The driving route includes: drawing circles with radii of 30m and 50m respectively in white paint on the test site's circular plaza. The driving speed includes: maneuvering the vehicle along a circle with a radius of 30m, adjusting the speed so that the lateral acceleration of the whole vehicle reaches (4.5±0.2)m / s2, and recording the speed at this time. Similarly, determine the corresponding speed when testing on a circle with a radius of 50m.

3. The method for evaluating tire wear capacity according to claim 2, characterized in that, The step of obtaining the average driving test mileage for the 30m and 50m circles based on the driving test mileage data for the 30m and 50m circles respectively includes: The test mileage data for the 30m and 50m circumference were obtained by formulas (1) and (2) to obtain the average test mileage for the 30m and 50m circumference respectively: （2） （3） Wherein: S30avg is the average test mileage on a 30m circle, S50avg is the average test mileage on a 50m circle, S1-S6 are the first test mileage, the second test mileage, the third test mileage, the fourth test mileage, the fifth test mileage and the sixth test mileage respectively, and S7-S12 are the seventh test mileage, the eighth test mileage, the ninth test mileage, the tenth test mileage, the eleventh test mileage and the twelfth test mileage respectively.

4. The method for evaluating tire wear capacity according to claim 3, characterized in that, The standard deviation values ​​of the driving test mileage on the 30m and 50m circles, obtained based on the driving test mileage data on the 30m and 50m circles respectively, include: The test mileage data for the 30m and 50m circumference driving tests were obtained through (3) and (4) to obtain the standard deviation values ​​of the test mileage for the 30m and 50m circumference driving tests, respectively: （4） （5） Where: S30log is the standard deviation of the test mileage on a 30m circle, and S50log is the standard deviation of the test mileage on a 50m circle.

5. A tire wear performance evaluation device, characterized in that, include: The acquisition module is used to acquire, when receiving tire wear capability evaluation request data, the mileage data of driving on a 30m and 50m circle respectively obtained from the fixed circle wear test according to the test requirements in the tire wear capability evaluation request data; The calculation module is used to obtain the average value of the driving test mileage on the 30m and 50m circles and the standard deviation value of the driving test mileage on the 30m and 50m circles, respectively, based on the driving test mileage data on the 30m and 50m circles. The evaluation module is used to evaluate tire wear capacity based on the average test mileage on the 30m and 50m circumference and the standard deviation of the test mileage on the 30m and 50m circumference. The fixed-circle wear test includes: 30m circumferential wear test: Maintain a vehicle speed of (4.5±0.2) m / s² while driving around a fixed circle; When the tires wear down to the tire tread wear mark, the test is stopped and the first test mileage from when the vehicle's lateral acceleration reaches (4.5±0.2) m / s2 to when the test stops is recorded. Replace with new tire samples and repeat the above two steps 5 times, recording the second, third, fourth, fifth, and sixth test mileages respectively; The 50m circumferential fixed circle wear test follows the same procedure as the 30m circumferential fixed circle wear test, respectively obtaining the seventh test mileage, the eighth test mileage, the ninth test mileage, the tenth test mileage, the eleventh test mileage, and the twelfth test mileage; The evaluation of tire wear capacity based on the average value of the 30m and 50m circular test mileage and the standard deviation of the 30m and 50m circular test mileage includes: The average value of the test mileage on the 30m and 50m circumference and the standard deviation value of the test mileage on the 30m and 50m circumference are used to determine the comprehensive evaluation score of tire wear performance through formula (5): M=a×S30avg+b×S50avg+c×S30log+d×S50log (1) Where: a and b are the influence factors of the average test mileage on a 30m and 50m circle, respectively; c and d are the influence factors of the standard deviation of the test mileage on a 30m and 50m circle, respectively; M is the comprehensive evaluation score of tire wear performance; S30avg is the average test mileage on a 30m circle; S50avg is the average test mileage on a 50m circle; S30log is the standard deviation of the test mileage on a 30m circle; and S50log is the standard deviation of the test mileage on a 50m circle. The evaluation result of tire wear performance is obtained by determining whether the comprehensive evaluation score of the tire wear performance meets the internal control standard threshold.

6. A terminal, characterized in that, include: One or more processors; Memory for storing the one or more processor-executable instructions; Wherein, the one or more processors are configured as follows: Perform a tire wear capacity evaluation method as described in any one of claims 1 to 4.

7. A non-transitory computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor of the terminal, the terminal is able to perform a tire wear capability evaluation method as described in any one of claims 1 to 4.

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