A six-component force test tire temperature detection method, device and computer program product

Abstract

The present invention relates to the field of tire testing technology, and in particular to a method, device, and computer program product for detecting tire temperature during a six-component force test. The method comprises: determining a tire temperature detection location based on a six-component force test objective, wherein the six-component force test objective includes a rubber heat generation test, a product benchmarking test, and a dynamic modeling test; determining a tire temperature increase method based on whether a six-component force testing machine is equipped with a drive shaft; intercepting and processing temperature data based on the six-component force test results; and calculating and extracting corresponding temperature data based on a six-component force test method, wherein the six-component force test method includes steady-state, dynamic, and transient tests, thereby ensuring that the temperature detection method covers all six-component force test conditions and establishing a reasonable and effective six-component force test tire temperature detection process.

Description

Technical Field

[0001] The present invention relates to the technical field of tire detection, and in particular to a method, device and computer program product for detecting tire temperature during a six-component force test. Background Art

[0002] Currently, tire dynamics performance evaluation and modeling and simulation have received widespread attention in the industry and have become an important part of tire and vehicle chassis development. As performance requirements gradually increase, the impact of tire temperature on dynamics has become a factor that cannot be ignored, and its importance is becoming increasingly prominent. Performance evaluation, product benchmarking, and rubber formula development in tire development need to consider the effects of temperature changes and frictional heat generation. High-precision modeling and simulation also need to introduce temperature influencing factors, and therefore are attracting more and more attention from tire companies and OEMs. The six-component force bench tester is the main testing equipment for tire dynamics performance. The six-component force of the tire is tested under specified test conditions to characterize the dynamic performance. Therefore, the demand for tire temperature testing in the six-component force test is also increasing.

[0003] Six-component force testing machines themselves lack tire temperature detection capabilities (some manufacturers, such as MTS and Calspan, offer equipment with additional temperature sensors). Therefore, there are currently no published standards for tire temperature detection in six-component force testing. Existing tire performance testing standards also lack specific rules for tire temperature detection methods. Therefore, it's impossible to guide temperature detection in six-component force tests, such as for cornering, longitudinal slip, and combined conditions, or to examine the relationship between tire temperature, heat generation, and six-component force.

[0004] Based on the above reasons, it is necessary to develop a method for detecting tire temperature in the six-component force test, which can determine the specific requirements for temperature detection in the six-component force test, establish a reasonable process for tire temperature detection in the test, and provide a basis for the evaluation of tire temperature changes and rubber heat generation in the six-component force test in product development. Summary of the Invention

[0005] To address the aforementioned technical issues, the present invention provides a method for detecting tire temperature during a six-component force test. This method addresses the current lack of a reliable method for measuring tire temperature during a six-component force test. This method is simple to operate and provides reliable results, significantly impacting tire development.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solutions:

[0007] A method for detecting tire temperature in a six-component force test, the method comprising the following steps:

[0008] 1. According to the purpose of the six-component force test, specify different positions of the tire for temperature detection

[0009] 1) In the rubber heating test, the temperature of the tire tread, groove, shoulder, sidewall, toe and tire interior is measured;

[0010] 2) During the product benchmarking test, the temperature of the tire tread and shoulder is tested;

[0011] 3) During the dynamic modeling test, the temperature of the tire tread is detected;

[0012] 2. According to the installation status of the tire drive shaft of the six-component force testing machine, choose to perform lateral or longitudinal sliding movement to increase the tire temperature

[0013] 1) When the six-component force testing machine is not equipped with a drive shaft, use a side slip angle sweep operation to increase the tire temperature. Set the tire test pressure, test load, and conveyor speed, and set several side slip angle sweep rates. After raising the tire to different test temperatures, conduct the test.

[0014] 2) When installing the drive shaft on the six-component force testing machine, use longitudinal sliding motion to increase the tire temperature, set the tire test pressure, test load, conveyor speed, set different tire longitudinal slip rates or drive shaft torques, and then raise the tire to different test temperatures before testing;

[0015] 3. Intercept tire temperature detection data

[0016] If the temperature sensor is not connected to the six-component force test system and is not synchronized with the six-component force data, the six-component force data collection start time is obtained by capturing the six-component force test record keyword. Combined with the six-component force test duration, the data in this time period is the synchronously collected tire temperature detection data.

[0017] Fourth, based on the difference in the acquisition frequency of the six-component force and temperature data, interpolation processing is performed on the data with low acquisition frequency to keep the number of data points consistent;

[0018] 5. Calculate and extract corresponding temperature data based on three test methods: six-component steady-state, dynamic, and transient tests

[0019] 1) In the steady-state test, each test condition of the tire remains constant, and the six-component force test results are the average of the test data. The average value of the temperature data collected during the entire test process is calculated;

[0020] 2) In dynamic tests, some test conditions change over time, and the rate of change is relatively slow. The average or maximum value of the temperature data is calculated, and the temperature data collected during the entire six-component force test is extracted to correspond to the six-component force data;

[0021] 3) During the transient test, the test conditions change relatively quickly in certain time periods, so it is necessary to maintain a high temperature acquisition frequency and extract the temperature data collected during the change process to correspond to the six-component force data.

[0022] Preferably, the tire tread temperature measuring device includes a sensor fixture and an infrared temperature sensor probe. The sensor fixture is installed on the radial actuator arm of the six-component force testing machine. 6-10 infrared temperature sensor probes are installed in the sensor fixture. The infrared temperature sensor probe can adjust the position and angle to illuminate the specified area of ​​the tire surface below, collect temperature data at a frequency of 3Hz, and can perform synchronous lateral deviation, roll and lifting movements with the tire to keep the probe irradiation position unchanged.

[0023] Preferably, the infrared temperature sensor probe has a temperature resolution of 0.2°C, a measurement accuracy of 1%, and a maximum detectable temperature of 300°C.

[0024] Preferably, the temperature inside the tire is measured by attaching a 24g wireless temperature sensor to the inner surface of the tire's dynamic balance point before the tire is installed on the rim. The sensor contains a temperature measurement chip and a battery. After the tire is inflated, the sensor detects the change in air pressure and starts working, sending the temperature data inside the tire to the wireless receiver at a frequency of 1Hz.

[0025] Preferably, in step 2, the tire test pressure is set to 230 kPa, the test load is set to 510 kg, and the rolling speed is set to 60 km / h. The sideslip angle sweep rates are set to 1, 2, 4, 6, 8, 10, and 12 degrees per second, and the sideslip angle range is set to 0 to ±7 degrees. The tire is then raised to different temperatures for testing.

[0026] Preferably, the switch for controlling the synchronous collection of temperature and six-component force in step three is composed of a laser-beaming photoelectric sensor, which includes a light projector and a light receiver, which are respectively installed on both sides of the conveyor belt of the simulated road surface of the six-component force testing machine, and continuously emits lasers; when the tire descends and contacts the conveyor belt, the six-component force test begins, at this time the laser is blocked by the tire, and the device starts tire temperature data collection; when the tire rises and leaves the conveyor belt, the six-component force test ends, the laser is received by the light receiver again, and the device turns off temperature collection, thereby realizing the synchronous collection of six-component force and tire temperature.

[0027] Preferably, in step 4, the six-component force and temperature data acquisition frequencies are 100 Hz and 3 Hz, respectively, and 1755 and 53 data points are collected, respectively; the 53 temperature data points are processed into 1755 by linear interpolation method to keep them consistent with the number of six-component force data points.

[0028] Furthermore, the present invention also provides a computer device, comprising a memory, a processor, and a computer program stored in the memory, wherein the processor executes the computer program to implement the method.

[0029] Furthermore, the present invention also provides a computer-readable storage medium having a computer program or instruction stored thereon, which implements the method when the computer program or instruction is executed by a processor.

[0030] Furthermore, the present invention also provides a computer program product, comprising a computer program or instructions, which implement the method when executed by a processor.

[0031] By employing the aforementioned technical solution, this present invention addresses the current lack of a method for reasonably measuring tire temperature during six-component force testing. It can determine the specific requirements for temperature measurement during six-component force testing and establish a rational process for measuring tire temperature during the test. This provides a foundation for evaluating tire temperature changes and rubber heating during six-component force testing during product development. This method is simple to operate and provides reliable test results, making it of great significance to tire development. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Flow chart of the detection method of the present invention.

[0033] Figure 2 Schematic diagram of the tire surface temperature detection device installed on the six-component force testing machine.

[0034] Figure 3 Schematic diagram of a tire cross-section with an in-tire temperature sensor attached to the inner surface.

[0035] Figure 4 Schematic diagram of the synchronous acquisition control switch installed on both sides of the conveyor belt of the six-component force testing machine.

[0036] Figure 5 This is a graph of the six-component sideslip angle and tire temperature versus time. DETAILED DESCRIPTION

[0037] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0038] like Figure 1 A six-component force test tire temperature detection method is shown. This method determines the tire temperature collection location and data screening and processing method based on the test purpose and test conditions, as well as the tire initial test temperature increase method.

[0039] The method specifically includes:

[0040] 1. Based on the purpose of the six-component force test, temperature measurements are performed at designated locations on the tire. In the rubber heat generation test, the temperatures of the tire tread, tread groove, shoulder, sidewall, bead toe, and tire interior are measured; in the product benchmark test, the temperatures of the tire tread and shoulder are measured; in the dynamic modeling test, the temperature of the tire tread is measured;

[0041] Tire surface temperature measuring device such as Figure 2As shown, the sensor fixture 2 is mounted on the radial actuator arm 1 of the six-component force testing machine. Eight infrared temperature sensor probes 3 are installed in the fixture. The sensors have a temperature resolution of 0.2°C, a measurement accuracy of 1%, and a maximum detection temperature of 300°C. The probes can be adjusted in position and angle to illuminate a specific area on the tire surface below, collecting temperature data at a frequency of 3Hz. They can synchronize with the tire's lateral movement, including roll, tilt, and lift, while maintaining a constant probe position.

[0042] In-fetal temperature measuring device Figure 3 As shown, before the tire is mounted on the rim, a 24g wireless temperature sensor 4 is attached to the inner surface of the tire's dynamic balance point. The sensor contains a temperature measurement chip and a battery. After the tire is inflated, the sensor detects changes in air pressure and starts working, sending tire temperature data to a wireless receiver at a frequency of 1Hz.

[0043] 2. According to the purpose of the six-component force test, some tests need to increase the initial temperature of the tire, such as modeling tests that consider the influence of temperature. According to the installation status of the tire drive shaft of the six-component force testing machine, choose to perform side slip or longitudinal sliding movement to increase the tire temperature. When the six-component force testing machine is not installed with a drive shaft, a side slip angle sweep operation is used to increase the tire temperature, set the tire test pressure, test load, and conveyor speed, set several side slip angle sweep rates, and raise the tire to different test temperatures before testing; when the six-component force testing machine is installed with a drive shaft, a longitudinal sliding movement is used to increase the tire temperature, set the tire test pressure, test load, and conveyor speed, set different tire longitudinal slip rates or drive shaft torques, and raise the tire to different test temperatures before testing.

[0044] 3. Intercept tire temperature data. Typically, real-time temperature data collected synchronously with the six-component force is intercepted. If the temperature sensor is not connected to the six-component force test system for synchronous collection, the six-component force collection start time is obtained by capturing the six-component force test record keyword. Combined with the six-component force test duration, the data captured during this period is the synchronously collected tire temperature data.

[0045] The switch for controlling temperature and six-component force synchronous acquisition is as follows: Figure 4 As shown, the system consists of a laser-beamed photoelectric sensor 7, comprising a projector and a receiver. These sensors are mounted on either side of a conveyor belt 6 on the simulated road surface of the six-component force testing machine, continuously emitting laser light. The six-component force test begins when the tire 5 descends and contacts the conveyor belt. At this point, the laser is blocked by the tire, and the device begins collecting tire temperature data. When the tire rises and leaves the conveyor belt, the six-component force test ends, the laser is received again by the receiver, and the device stops collecting temperature data, achieving simultaneous six-component force and tire temperature data collection.

[0046] 4. Based on the difference in the acquisition frequency of the six-component force and temperature data, interpolation processing is performed on the data with low acquisition frequency to keep the number of data points consistent.

[0047] 5. Calculate and extract corresponding temperature data based on the six-component force test method. Six-component force test methods can be divided into three categories: steady-state, dynamic (or quasi-steady-state), and transient tests. In steady-state tests, each tire test condition remains constant, and the six-component force test result is the average of the test data. The temperature data collected throughout the test is averaged. In dynamic tests, certain test conditions change continuously over time, with a relatively slow rate of change. The temperature data is averaged or maximized, and the temperature data collected throughout the six-component force test is extracted to correspond to the six-component force data. In transient tests, the test conditions change relatively quickly during certain time periods, requiring a high temperature collection frequency. The temperature data collected during the change process is extracted to correspond to the six-component force data.

[0048] Example 1

[0049] In this embodiment, a car tire with a specification of 235 / 50R18 is used to conduct a magic formula cornering model test taking into account the temperature effect on a six-component flat-bed testing machine.

[0050] 1. Aim the 8 infrared temperature sensor probes at the tread to detect the temperature;

[0051] 2. Raise the initial tire temperature during the test. Set the tire test pressure to 230kPa, the test load to 510kg, and the rolling speed to 60km / h. Set the slip angle sweep rates to 1, 2, 4, 6, 8, 10, and 12 degrees per second, and the slip angle range to 0 to ±7°. Raise the tire to different temperatures for testing.

[0052] 3. After the test is completed, intercept the real-time temperature data collected synchronously with the six-component force. The infrared temperature sensor is not connected to the six-component force test system to start synchronous collection. By searching the keyword "498: Condition ......" in the six-component force test record to start data collection, the corresponding system time 11:50:17 is obtained; the six-component force data file is checked to obtain the test duration of 17.54s. Based on these two, the data in the time period of 11:50:17:310~11:50:35:178 in the temperature data file is intercepted, which is the real-time temperature detection data during the six-component force test;

[0053] Fourth, the six-component force and temperature data were collected at frequencies of 100Hz and 3Hz, respectively, collecting 1755 and 53 data points. The 53 temperature data points were processed into 1755 using linear interpolation to keep the number of six-component force data points consistent.

[0054] 5. Calculate the average value of the temperature detection data and draw a curve of the tire side slip angle 1. Interpolate the temperature data with respect to time, such as Figure 5 shown.

[0055] The above is a description of the embodiments of the present invention. The above description of the disclosed embodiments will enable professionals in the field to implement or use the present invention. Various modifications to these embodiments will be apparent to professionals in the field. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but should conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A six-component force test tire temperature detection method, characterized in that: The method comprises the following steps:

1. According to the purpose of the six-component force test, specify different positions of the tire for temperature detection 1) In the rubber heating test, the temperature of the tire tread, groove, shoulder, sidewall, toe and tire interior is measured; 2) During the product benchmarking test, the temperature of the tire tread and shoulder is tested; 3) During the dynamic modeling test, the temperature of the tire tread is detected; 2. According to the installation status of the tire drive shaft of the six-component force testing machine, choose to perform lateral or longitudinal sliding movement to increase the tire temperature 1) When the six-component force testing machine is not equipped with a drive shaft, use a side slip angle sweep operation to increase the tire temperature. Set the tire test pressure, test load, and conveyor speed, and set several side slip angle sweep rates. After raising the tire to different test temperatures, conduct the test. 2) When installing the drive shaft on the six-component force testing machine, use longitudinal sliding motion to increase the tire temperature, set the tire test pressure, test load, conveyor speed, set different tire longitudinal slip rates or drive shaft torques, and then raise the tire to different test temperatures before testing; 3. Intercept tire temperature detection data If the temperature sensor is not connected to the six-component force test system and is not synchronized with the six-component force data, the six-component force data collection start time is obtained by capturing the six-component force test record keyword. Combined with the six-component force test duration, the data in this time period is the synchronously collected tire temperature detection data. Fourth, based on the difference in the acquisition frequency of the six-component force and temperature data, interpolation processing is performed on the data with low acquisition frequency to keep the number of data points consistent; 5. Calculate and extract corresponding temperature data based on three test methods: six-component steady-state, dynamic, and transient tests 1) In the steady-state test, each test condition of the tire remains constant, and the six-component force test results are the average of the test data. The average value of the temperature data collected during the entire test process is calculated; 2) In dynamic tests, some test conditions change over time, and the rate of change is relatively slow. The average or maximum value of the temperature data is calculated, and the temperature data collected during the entire six-component force test is extracted to correspond to the six-component force data; 3) During transient tests, the test conditions change relatively quickly in certain time periods, so a high temperature acquisition frequency must be maintained to extract the temperature data collected during the change process and correspond it to the six-component force data; The tire tread temperature measuring device includes a sensor fixture and an infrared temperature sensor probe. The sensor fixture is installed on the radial actuator arm of the six-component force testing machine. The sensor fixture is equipped with 6-10 infrared temperature sensor probes. The infrared temperature sensor probes can adjust the position and angle to illuminate a specified area on the tire surface below to collect temperature data. The infrared temperature sensor probes can also synchronize with the tire's lateral deviation, roll, and lifting movements to maintain the probe irradiation position unchanged. The switch that controls the synchronous collection of temperature and six-component force in step three is composed of a laser photoelectric sensor. The sensor includes a projector and a receiver, which are installed on both sides of the conveyor belt of the simulated road surface of the six-component force testing machine, and continuously emits lasers. When the tire descends and contacts the conveyor belt, the six-component force test begins. At this time, the laser is blocked by the tire, and the device starts tire temperature data collection. When the tire rises and leaves the conveyor belt, the six-component force test ends, the laser is received by the receiver again, and the device turns off temperature collection, thereby realizing the synchronous collection of six-component force and tire temperature.

2. The tire temperature detection method for a six-component force test according to claim 1, characterized in that: The infrared temperature sensor probe has a temperature resolution of 0.2°C, a measurement accuracy of 1%, and a maximum detection temperature of 300°C.

3. The tire temperature detection method for a six-component force test according to claim 1, characterized in that: The tire's internal temperature is measured by attaching a 24g wireless temperature sensor to the inner surface of the tire's dynamic balance point before the tire is installed on the rim. The sensor contains a temperature measurement chip and a battery. After the tire is inflated, the sensor detects changes in air pressure and starts working, sending the internal temperature data to a wireless receiver at a frequency of 1Hz.

4. The tire temperature detection method for a six-component force test according to claim 1, characterized in that: In step 2, set the tire test pressure to 230 kPa, the test load to 510 kg, and the rolling speed to 60 km / h; set the sideslip angle sweep rates to 1, 2, 4, 6, 8, 10, and 12 deg / s, and the sideslip angle range to 0 to ±7°. Raise the tire to different temperatures for testing.

5. The tire temperature detection method for a six-component force test according to claim 1, characterized in that: In step 4, the six-component force and temperature data acquisition frequencies were 100 Hz and 3 Hz, respectively, and 1755 and 53 data points were collected, respectively. The 53 temperature data points were processed into 1755 by linear interpolation to keep them consistent with the number of six-component force data points.

6. A computer device comprising a memory, a processor, and a computer program stored in the memory, wherein: The processor executes the computer program to implement the method according to any one of claims 1 to 5.

7. A computer-readable storage medium having a computer program or instruction stored thereon, characterized in that: When the computer program or instruction is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

8. A computer program product comprising a computer program or instructions, characterized in that When the computer program or instruction is executed by a processor, the method according to any one of claims 1 to 5 is implemented.

Images