Heat damage test method and device for vehicle bumper and vehicle

Abstract

The invention provides a heat damage test method and device for a vehicle bumper and a vehicle, and the method comprises the steps: controlling a to-be-tested vehicle to carry out at least one group of heat damage tests in a test site based on at least one group of preset test working condition parameters under the condition that the to-be-tested vehicle reaches a preset test state; for each group of heat damage tests, acquiring an actually measured surface temperature value corresponding to a target bumper mounted in the to-be-tested vehicle at the test vehicle speed included in the test working condition parameters; based on the actually measured surface temperature value, a surface correction temperature value corresponding to the target bumper is obtained through a preset data correction formula, and whether the surface correction temperature value is larger than a calibration temperature value or not is judged; and if not, determining that the target bumper meets the performance requirement corresponding to the heat damage test. By means of the method, the accuracy and efficiency of the vehicle bumper heat damage test are improved, and then the heat damage risk of the vehicle bumper is reduced.

Description

Technical Field

[0001] The present application relates to the field of vehicle testing technology, and in particular to a method and device for testing thermal damage to a vehicle bumper, and a vehicle. Background Art

[0002] For traditional fuel vehicles and hybrid vehicles equipped with engines, the engine exhaust temperature in the vehicle is relatively high, and the components around the exhaust system are at risk of thermal damage. The vehicle bumper is generally made of plastic, which is easily deformed by heat. In addition, if it is exposed to high temperature for a long time, the inside of the bumper may suffer thermal damage, which not only affects the appearance, but also affects the service life of the bumper. It may even cause thermal damage risks such as ablation, burning, and black smoke under certain working conditions.

[0003] At present, the thermal damage test for the heat resistance of vehicle bumpers is to place the bumper samples in a high-temperature environment chamber, so that the bumper samples are placed in the effective space of the high-temperature environment chamber without load and without contact with each other and the wall of the heating box. After being placed for a period of time, the function and shape data of the bumper samples are measured to determine the thermal damage performance of the vehicle bumper. Since this test method has relatively simple comparison conditions and the test data is not processed, the accuracy and efficiency of the vehicle bumper thermal damage test are reduced, thereby increasing the risk of thermal damage to the vehicle bumper. Summary of the invention

[0004] In view of this, the purpose of the present application is to provide a thermal damage test method, device and vehicle for a vehicle bumper. By performing at least one set of thermal damage tests on the vehicle to be tested in a test state, the measured surface temperature values ​​corresponding to the target bumper at multiple test vehicle speeds obtained in the thermal damage test are corrected to quickly find out whether the target bumper has a risk of overtemperature, and based on the thermal damage test data, the thermal damage performance of the target bumper at different temperatures and vehicle speeds is inferred, thereby improving the accuracy and efficiency of the thermal damage test of the vehicle bumper, thereby reducing the risk of thermal damage to the vehicle bumper.

[0005] The present application embodiment provides a thermal damage test method for a vehicle bumper, the thermal damage test method comprising:

[0006] When the vehicle to be tested reaches a preset test state, based on at least one set of preset test condition parameters, controlling the vehicle to be tested to perform at least one set of heat damage tests in a test site;

[0007] For each set of thermal damage tests, obtaining a measured surface temperature value corresponding to a target bumper installed in the vehicle to be tested at a test vehicle speed included in the test operating condition parameters;

[0008] Based on the measured surface temperature value, a surface correction temperature value corresponding to the target bumper is obtained by using a preset data correction formula, and it is determined whether the surface correction temperature value is greater than a calibration temperature value;

[0009] If not, it is determined that the target bumper meets the performance requirements corresponding to the thermal damage test.

[0010] Furthermore, the method further comprises:

[0011] Based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, a thermal damage performance model of the target bumper is established using a preset linear equation expression to infer the thermal damage risk of the target bumper of the vehicle to be tested at different vehicle speeds.

[0012] Furthermore, the heat damage performance model of the target bumper is established based on the surface corrected temperature value corresponding to the test vehicle speed in each group of heat damage tests using a preset linear equation expression, including:

[0013] Establishing at least one test data group corresponding to the thermal damage test based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each set of thermal damage tests;

[0014] Inputting the test data included in the test data group into a preset linear equation expression respectively to determine the coefficient value corresponding to the target bumper thermal damage performance model;

[0015] Based on the coefficient value, a thermal damage performance model of the target bumper is established.

[0016] Furthermore, for each set of thermal damage tests, obtaining the measured surface temperature value corresponding to the target bumper installed in the vehicle to be tested at the test vehicle speed included in the test operating condition parameters includes:

[0017] Based on the test requirements corresponding to the preset test state, determining at least one temperature measurement point set on the surface of a target bumper installed in the vehicle to be tested;

[0018] For each group of heat damage tests, obtaining a measured temperature value corresponding to the at least one temperature measuring point at a test vehicle speed included in the test operating condition parameters;

[0019] Based on the quantitative relationship of the measured temperature values, a first measured temperature value is determined among the measured temperature values, and the first measured temperature value is determined as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

[0020] Furthermore, based on the measured surface temperature value, a preset data correction formula is used to obtain a surface correction temperature value corresponding to the target bumper, including:

[0021] Obtaining a measured ambient temperature value corresponding to each group of heat damage tests, and determining a test ambient temperature value corresponding to the at least one group of heat damage tests based on the measured ambient temperature value;

[0022] The measured surface temperature value and the test environment temperature value are input into a preset data correction formula to obtain a surface correction temperature value corresponding to the target bumper.

[0023] The embodiment of the present application also provides a thermal damage test device for a vehicle bumper, the thermal damage test device comprising:

[0024] A heat damage test module, used for controlling the vehicle to be tested to perform at least one set of heat damage tests in a test site based on at least one set of preset test condition parameters when the vehicle to be tested reaches a preset test state;

[0025] A temperature acquisition module, for acquiring, for each set of thermal damage tests, a measured surface temperature value of a target bumper installed in the vehicle to be tested corresponding to a test vehicle speed included in the test operating condition parameters;

[0026] A correction judgment module, configured to obtain a surface correction temperature value corresponding to the target bumper based on the measured surface temperature value by using a preset data correction formula, and to judge whether the surface correction temperature value is greater than a calibration temperature value;

[0027] The performance determination module is used to determine whether the target bumper meets the performance requirements corresponding to the thermal damage test if the surface correction temperature value is not greater than the calibration temperature value.

[0028] Furthermore, the thermal damage test device also includes a model building module, and the model building module is used to:

[0029] Based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, a thermal damage performance model of the target bumper is established using a preset linear equation expression to infer the thermal damage risk of the target bumper of the vehicle to be tested at different vehicle speeds.

[0030] Further, when the model building module is used to establish the target bumper thermal damage performance model based on the surface corrected temperature value corresponding to the test vehicle speed in each group of thermal damage tests of the target bumper using a preset linear equation expression, the model building module is used to:

[0031] Establishing at least one test data group corresponding to the thermal damage test based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each set of thermal damage tests;

[0032] Inputting the test data included in the test data group into a preset linear equation expression respectively to determine the coefficient value corresponding to the target bumper thermal damage performance model;

[0033] Based on the coefficient value, a thermal damage performance model of the target bumper is established.

[0034] Further, when the temperature acquisition module is used to obtain the measured surface temperature value corresponding to the test vehicle speed included in the test condition parameters for each group of thermal damage tests of the target bumper installed in the vehicle to be tested, the temperature acquisition module is used to:

[0035] Based on the test requirements corresponding to the preset test state, determining at least one temperature measurement point set on the surface of a target bumper installed in the vehicle to be tested;

[0036] For each group of heat damage tests, obtaining a measured temperature value corresponding to the at least one temperature measuring point at a test vehicle speed included in the test operating condition parameters;

[0037] Based on the quantitative relationship of the measured temperature values, a first measured temperature value is determined among the measured temperature values, and the first measured temperature value is determined as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

[0038] Further, when the correction judgment module is used to obtain the surface correction temperature value corresponding to the target bumper based on the measured surface temperature value using a preset data correction formula, the correction judgment module is used to:

[0039] Obtaining a measured ambient temperature value corresponding to each group of heat damage tests, and determining a test ambient temperature value corresponding to the at least one group of heat damage tests based on the measured ambient temperature value;

[0040] The measured surface temperature value and the test environment temperature value are input into a preset data correction formula to obtain a surface correction temperature value corresponding to the target bumper.

[0041] The embodiment of the present application also provides a vehicle using the above-mentioned vehicle bumper thermal damage test method.

[0042] An embodiment of the present application also provides an electronic device, including: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and when the machine-readable instructions are executed by the processor, the steps of the thermal damage test method for a vehicle bumper as described above are performed.

[0043] An embodiment of the present application further provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the steps of the thermal damage test method for a vehicle bumper as described above are executed.

[0044] The thermal damage test method, device and vehicle for a vehicle bumper provided in the embodiments of the present application control the vehicle to be tested to perform at least one group of thermal damage tests in a test site based on at least one group of preset test operating condition parameters when the vehicle to be tested reaches a preset test state; for each group of thermal damage tests, obtain the actual measured surface temperature value corresponding to the target bumper installed in the vehicle to be tested at the test vehicle speed included in the test operating condition parameters; based on the measured surface temperature value, obtain the surface correction temperature value corresponding to the target bumper using a preset data correction formula, and determine whether the surface correction temperature value is greater than the calibrated temperature value; if not, determine that the target bumper meets the performance requirements corresponding to the thermal damage test.

[0045] Compared with the prior art method of placing the bumper specimen into a high temperature environment chamber, arranging the bumper specimens in the effective space of the high temperature environment chamber for a period of time without being loaded and without contacting each other and the wall of the heating box, and measuring the function and shape data of the bumper specimens, at least one set of thermal damage tests is performed on the vehicle to be tested in a test state, and the corresponding measured surface temperature values ​​of the target bumper obtained in the thermal damage test at multiple test vehicle speeds are corrected to quickly find out whether the target bumper has a risk of overtemperature, and based on the thermal damage test data, the thermal damage performance of the target bumper at different temperatures and vehicle speeds is inferred, thereby improving the accuracy and efficiency of the thermal damage test of the vehicle bumper, thereby reducing the risk of thermal damage to the vehicle bumper.

[0046] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 One of the flow charts of a thermal damage test method for a vehicle bumper provided in an embodiment of the present application;

[0049] Figure 2 A schematic diagram of the installation of a heat damage test measurement sensor provided in an embodiment of the present application;

[0050] Figure 3 The second flowchart of a thermal damage test method for a vehicle bumper provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of a target bumper thermal damage performance model provided in an embodiment of the present application;

[0052] Figure 5 One of the structural schematic diagrams of a thermal damage test device for a vehicle bumper provided in an embodiment of the present application;

[0053] Figure 6 The second structural schematic diagram of a thermal damage test device for a vehicle bumper provided in an embodiment of the present application;

[0054] Figure 7 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0055] To make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. The components of the embodiments of the present application usually described and shown in the drawings here can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the application claimed for protection, but merely represents the selected embodiments of the present application. Based on the embodiments of the present application, each other embodiment obtained by those skilled in the art without making creative work belongs to the scope of protection of the present application.

[0056] Research has found that the current thermal damage test for the heat resistance of vehicle bumpers is to place the bumper specimens in a high-temperature environment chamber, so that the bumper specimens are not subjected to load and do not contact each other or the walls of the heating box, and are arranged in the effective space of the high-temperature environment chamber for a period of time, and the function and shape data of the bumper specimens are measured to determine the thermal damage performance of the vehicle bumper. Since this test method has relatively simple comparison conditions and the test data is not processed, the accuracy and efficiency of the vehicle bumper thermal damage test are reduced, thereby increasing the risk of thermal damage to the vehicle bumper.

[0057] Based on this, an embodiment of the present application provides a thermal damage test method for a vehicle bumper. By performing at least one set of thermal damage tests on the vehicle to be tested in a test state, the actual measured surface temperature values ​​corresponding to the target bumper at multiple test vehicle speeds obtained in the thermal damage test are corrected to quickly find out whether the target bumper has a risk of overtemperature, and based on the thermal damage test data, the thermal damage performance of the target bumper at different temperatures and vehicle speeds is inferred, thereby improving the accuracy and efficiency of the thermal damage test of the vehicle bumper, thereby reducing the risk of thermal damage to the vehicle bumper.

[0058] See also Figure 1 , Figure 1 This is one of the flow charts of a thermal damage test method for a vehicle bumper provided in an embodiment of the present application. Figure 1 As shown in the figure, the thermal damage test method for a vehicle bumper provided in the embodiment of the present application includes:

[0059] S101. When a vehicle to be tested reaches a preset test state, based on at least one set of preset test operating condition parameters, control the vehicle to be tested to perform at least one set of heat damage tests in a test site.

[0060] It should be noted that the thermal damage test of a vehicle refers to a test method for evaluating the thermal characteristics and performance of various vehicle components in a simulated high-temperature environment. The thermal damage test can evaluate the performance of the vehicle in a high-temperature environment, for example, evaluating key indicators such as engine coolant temperature, engine oil temperature, and vehicle device temperature. Based on the thermal damage test, further exploration can be made into effective improvement measures to reduce the thermal damage problem of the vehicle in a high-temperature environment.

[0061] In the embodiment of the present application, before performing at least one set of thermal damage tests on the vehicle to be tested, the vehicle to be tested needs to be prepared for the test so that the vehicle to be tested reaches a preset test state.

[0062] As an example of test preparation for a vehicle to be tested, in specific implementation, first, a vehicle safety inspection is carried out on the vehicle to be tested in accordance with the standard requirements of GB / T12534, and the test conditions of the test site are confirmed; then, according to the preset measurement parameters and sensor installation position table, the corresponding thermal damage test measurement sensor is installed in the vehicle to be tested; finally, the measurement parameters during the entire thermal damage test process are recorded through data acquisition equipment.

[0063] An example of a preset measurement parameter and sensor installation position table is shown below.

[0064]

[0065]

[0066] For example, see Figure 2 , Figure 2 This is a schematic diagram of the installation of a heat damage test measurement sensor provided in an embodiment of the present application. Figure 2 As shown in , for the target bumper (rear bumper) in the vehicle to be tested, the bumper temperature sensors in the thermal damage test measurement sensor are respectively installed on the left surface of the rear bumper, the middle surface of the rear bumper, and the right surface of the rear bumper; the exhaust gas temperature sensors are respectively installed on the surface of the exhaust tail pipe closest to the bumper and 5 cm into the exhaust tail pipe outlet.

[0067] Furthermore, the measured parameters during the entire heat damage test are recorded by a data acquisition device. Specifically, the temperature sensor in the data acquisition module (Iptronik) and the on-board automatic diagnostic system line (OBD line) are connected to the CAN communication bus card in the vehicle, and then the CAN communication bus card is connected in series to the host responsible for the heat damage test. The IPmotion software installed on the host drives the temperature sensor and the CAN communication bus card to work, collects all the data measured during the test and records the data in the host.

[0068] In an embodiment of the present application, after installing the heat damage test measurement sensor and setting up the storage record of the data acquisition equipment, first, the test mass of the vehicle to be tested is controlled to be adjusted to the curb mass of the whole vehicle plus the preset counterweight. For example, the preset counterweight can be set to 180KG to simulate the passenger weight of the vehicle to be tested; then, the test weather conditions of the test site are controlled to be adjusted to the preset weather conditions. For example, the preset weather conditions include: a sunny day with plenty of sunshine, few clouds, a temperature of more than 20°C, a wind speed of no more than 3m / s, etc.; finally, the vehicle to be tested is controlled to run hot in the test site so that the engine water temperature, oil temperature, transmission oil temperature, etc. of the vehicle to be tested reach a stable state, so as to confirm that the vehicle to be tested reaches the preset test state.

[0069] In this step, when it is confirmed that the vehicle to be tested reaches a preset test state, the vehicle to be tested is controlled to perform at least one set of thermal damage tests in the test site according to at least one set of preset test operating condition parameters.

[0070] An example of at least one set of test condition parameters is shown in the following table.

[0071]

[0072] Furthermore, in at least one set of thermal damage tests, if a vehicle alarm occurs in the vehicle to be tested, the vehicle to be tested is controlled to stop the thermal damage test.

[0073] S102: for each set of thermal damage tests, obtaining a measured surface temperature value corresponding to a target bumper installed in the vehicle to be tested at a test vehicle speed included in the test operating condition parameters.

[0074] In this step, during the specific implementation, first, based on the test requirements corresponding to the preset test state, at least one temperature measuring point set on the surface of the target bumper installed in the vehicle to be tested is determined; then, for each group of thermal damage tests, the measured temperature value corresponding to the at least one temperature measuring point at the test vehicle speed included in the test operating condition parameters is obtained; finally, based on the quantitative relationship of the measured temperature values, a first measured temperature value is determined among the measured temperature values, and the first measured temperature value is determined as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

[0075] In the embodiment of the present application, for at least one bumper installed in the vehicle to be tested, the target bumper is any one of the at least one bumper, for example, the bumper includes but is not limited to a front bumper, a rear bumper, and a side bumper.

[0076] In one implementation of the present application, during specific implementation, step S102 may include:

[0077] S1021. Based on the test requirements corresponding to the preset test state, determine at least one temperature measurement point set on the surface of a target bumper installed in the vehicle to be tested.

[0078] In this step, a layout scheme of the bumper temperature sensors in a preset test state is determined, and based on the layout scheme, at least one temperature measurement point disposed on the surface of a target bumper installed in the vehicle to be tested is determined.

[0079] S1022. For each group of thermal damage tests, obtain the actual measured temperature value corresponding to the at least one temperature measuring point at the test vehicle speed included in the test operating condition parameters.

[0080] In this step, the actual measured temperature value corresponding to the test vehicle speed included in the test operating condition parameters at least one temperature measurement point in each group of thermal damage tests is obtained.

[0081] S1023. Based on the quantitative relationship of the measured temperature values, determine a first measured temperature value among the measured temperature values, and determine the first measured temperature value as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

[0082] In this step, when it is implemented specifically, first, the at least one measured temperature value obtained is sorted in order from small to large according to the relationship of quantity; then, the temperature value with the largest value among the at least one measured temperature value is determined as the first measured temperature value; finally, the first measured temperature value is determined as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

[0083] S103: Based on the measured surface temperature value, a surface correction temperature value corresponding to the target bumper is obtained using a preset data correction formula, and it is determined whether the surface correction temperature value is greater than a calibration temperature value.

[0084] In this step, during the specific implementation, first, obtain the measured ambient temperature value corresponding to each group of thermal damage tests; then, based on the measured ambient temperature value, determine the test ambient temperature value corresponding to at least one group of thermal damage tests; then, input the measured surface temperature value and the test ambient temperature value into a preset data correction formula to obtain the surface correction temperature value corresponding to the target bumper; finally, determine whether the surface correction temperature value is greater than the calibrated temperature value.

[0085] In an embodiment of the present application, the calibration temperature value can be comprehensively calibrated according to the engineering objectives and test requirements of the thermal damage test. For example, the calibration temperature value can be set to 80°C, but is not limited to 80°C. It can also be other temperature values, and the present application will no longer limit this.

[0086] In one embodiment of the present application, in a specific implementation, the step of obtaining the surface correction temperature value corresponding to the target bumper by using a preset data correction formula based on the measured surface temperature value in step S103 may include:

[0087] S1031. Obtain the measured ambient temperature value corresponding to each group of heat damage tests, and determine the test ambient temperature value corresponding to the at least one group of heat damage tests based on the measured ambient temperature value.

[0088] In this step, during the specific implementation, first, the measured ambient temperature value corresponding to the test environment in each group of heat damage tests is obtained; then, the mean of at least one measured ambient temperature value is calculated to obtain the mean calculation result; finally, the mean calculation result is determined as the test environment temperature value corresponding to at least one group of heat damage tests.

[0089] S1032: Input the measured surface temperature value and the test environment temperature value into a preset data correction formula to obtain a surface correction temperature value corresponding to the target bumper.

[0090] In this step, the measured surface temperature value corresponding to the target bumper in each group of thermal damage tests at the test vehicle speed in the group of thermal damage tests and the test environment temperature value are respectively substituted into the preset data correction formula to obtain the calculation result of the surface correction temperature value corresponding to the target bumper.

[0091] Among them, the expression of the preset data correction formula is as follows.

[0092] T=KT a +T s .

[0093] Where, T is the surface correction temperature value corresponding to the target bumper, in degrees Celsius (℃); T a is the test environment temperature value corresponding to at least one set of heat damage tests, in degrees Celsius (℃); T s is the actual measured surface temperature value of the target bumper at the test vehicle speed in this set of thermal damage tests, in degrees Celsius (℃); K is the correction factor.

[0094] Here, the correction coefficient can be determined according to the actual correction requirements and the structure of the target bumper. For example, the correction coefficient K can be set to 35, but is not limited to 35, and can also be other values. This application will not limit it here.

[0095] As an example, the test data table of the measured surface temperature values ​​before correction is shown in the following table.

[0096]

[0097]

[0098] As another example, the experimental data table of the corrected surface temperature value is shown in the following table.

[0099]

[0100] S104: If not, determine whether the target bumper meets the performance requirements corresponding to the thermal damage test.

[0101] In this step, if the surface correction temperature value is less than or equal to the calibration temperature value, it indicates that the heat resistance of the target bumper is qualified, and it is determined that the target bumper meets the performance requirements corresponding to the heat damage test.

[0102] Furthermore, if the surface correction temperature value is greater than the calibration temperature value, the target bumper is improved in design based on the design parameters of the target bumper of the vehicle to be tested.

[0103] Optional, see Figure 3 , Figure 3 This is a flow chart of a thermal damage test method for a vehicle bumper provided in an embodiment of the present application. Figure 3 As shown in, in addition to the thermal damage test method for a vehicle bumper described in steps S101 to S104, step S105 is also included. Specifically, step S105 is used to illustrate a method for establishing a target bumper thermal damage performance model based on the corresponding surface corrected temperature value at the test vehicle speed in each group of thermal damage tests, so as to reduce the risk of thermal damage to the vehicle bumper.

[0104] S105. Based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, a thermal damage performance model of the target bumper is established using a preset linear equation expression to infer the thermal damage risk of the target bumper of the vehicle to be tested at different vehicle speeds.

[0105] In this step, during the specific implementation, first, based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, at least one test data group corresponding to the thermal damage test is established; then, the test data included in the test data group is respectively input into a preset linear equation expression to determine the coefficient value corresponding to the thermal damage performance model of the target bumper; finally, based on the coefficient value, the thermal damage performance model of the target bumper is established.

[0106] In one embodiment of the present application, in a specific implementation, the step of establishing the thermal damage performance model of the target bumper in step S105 based on the surface correction temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests and using a preset linear equation expression may include:

[0107] S1051. Establish at least one test data group corresponding to the thermal damage test based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each set of thermal damage tests.

[0108] In this step, the surface corrected temperature values ​​corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests are integrated to establish at least one test data group corresponding to the thermal damage test.

[0109] Illustratively, an example of a test data set corresponding to at least one set of heat damage tests is shown in the following table.

[0110]

[0111] S1052: Input the test data included in the test data group into a preset linear equation expression respectively to determine the coefficient value corresponding to the target bumper thermal damage performance model.

[0112] In this step, each test data included in the test data group is input into a preset linear equation expression, and the coefficient value corresponding to the target bumper thermal damage performance model is determined by solving the equation expression.

[0113] Specifically, the preset linear equation expression is as follows.

[0114] T=av 2 +bv+c.

[0115] Wherein, T is the surface correction temperature value corresponding to the test vehicle speed, in degrees Celsius (℃); a, b, c are the coefficient values ​​corresponding to the target bumper thermal damage performance model; v is the test vehicle speed, in km / h.

[0116] S1053: Establish a thermal damage performance model of the target bumper based on the coefficient value.

[0117] In this step, the determined coefficient value is substituted into a preset linear equation expression to determine the linear equation of the target bumper thermal damage performance model, and the target bumper thermal damage performance model is established.

[0118] For example, see Figure 4 , Figure 4 This is a schematic diagram of a target bumper thermal damage performance model provided in an embodiment of the present application. Figure 4 As shown in the figure, the horizontal axis is the test vehicle speed, the vertical axis represents the surface correction temperature value of the target bumper, the solid line curve represents the performance curve of the target bumper thermal damage performance model, and the dotted line curve represents the relationship curve between the measured surface temperature before correction and the test vehicle speed. The linear equation of the target bumper thermal damage performance model is determined as "T = -0.003v 2 +0.8527v+8.7484”; According to the thermal damage performance model of the target bumper, it can be inferred that when the vehicle speed is 200km / h, the corrected temperature of the middle outer surface of the target bumper is about 59.2.

[0119] The thermal damage test method for a vehicle bumper provided in an embodiment of the present application performs at least one set of thermal damage tests on the vehicle to be tested in a test state, and corrects the measured surface temperature values ​​corresponding to the target bumper at multiple test vehicle speeds obtained in the thermal damage test, so as to quickly find out whether the target bumper has a risk of overtemperature, and based on the thermal damage test data, infer the thermal damage performance of the target bumper at different temperatures and vehicle speeds, thereby improving the accuracy and efficiency of the thermal damage test of the vehicle bumper, and thereby reducing the risk of thermal damage to the vehicle bumper.

[0120] See also Figure 5 , Figure 6 , Figure 5 This is one of the structural schematic diagrams of a thermal damage test device for a vehicle bumper provided in an embodiment of the present application. Figure 6 This is a second structural schematic diagram of a thermal damage test device for a vehicle bumper provided in an embodiment of the present application. Figure 5 As shown in , the thermal damage test device 500 includes:

[0121] The heat damage test module 510 is used to control the vehicle to be tested to perform at least one set of heat damage tests in a test site based on at least one set of preset test condition parameters when the vehicle to be tested reaches a preset test state;

[0122] The temperature acquisition module 520 is used to obtain, for each group of thermal damage tests, a measured surface temperature value of a target bumper installed in the vehicle to be tested at a test vehicle speed included in the test operating condition parameters;

[0123] A correction judgment module 530 is used to obtain a surface correction temperature value corresponding to the target bumper based on the measured surface temperature value using a preset data correction formula, and to determine whether the surface correction temperature value is greater than a calibration temperature value;

[0124] The performance determination module 540 is configured to determine whether the target bumper meets the performance requirement corresponding to the thermal damage test if the surface correction temperature value is not greater than the calibration temperature value.

[0125] Further, such as Figure 6 As shown in , the thermal damage test device 500 further includes a model building module 550, and the model building module 550 is used to:

[0126] Based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, a thermal damage performance model of the target bumper is established using a preset linear equation expression to infer the thermal damage risk of the target bumper of the vehicle to be tested at different vehicle speeds.

[0127] Further, when the model building module 550 is used to establish the thermal damage performance model of the target bumper based on the surface corrected temperature value corresponding to the test vehicle speed in each set of thermal damage tests and using a preset linear equation expression, the model building module 550 is used to:

[0128] Establishing at least one test data group corresponding to the thermal damage test based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each set of thermal damage tests;

[0129] Inputting the test data included in the test data group into a preset linear equation expression respectively to determine the coefficient value corresponding to the target bumper thermal damage performance model;

[0130] Based on the coefficient value, a thermal damage performance model of the target bumper is established.

[0131] Further, when the temperature acquisition module 520 is used to obtain the measured surface temperature value corresponding to the test vehicle speed included in the test condition parameters for each group of thermal damage tests of the target bumper installed in the test vehicle, the temperature acquisition module 520 is used to:

[0132] Based on the test requirements corresponding to the preset test state, determining at least one temperature measurement point set on the surface of a target bumper installed in the vehicle to be tested;

[0133] For each group of heat damage tests, obtaining a measured temperature value corresponding to the at least one temperature measuring point at a test vehicle speed included in the test operating condition parameters;

[0134] Based on the quantitative relationship of the measured temperature values, a first measured temperature value is determined among the measured temperature values, and the first measured temperature value is determined as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

[0135] Further, when the correction judgment module 530 is used to obtain the surface correction temperature value corresponding to the target bumper based on the measured surface temperature value using a preset data correction formula, the correction judgment module 530 is used to:

[0136] Obtaining a measured ambient temperature value corresponding to each group of heat damage tests, and determining a test ambient temperature value corresponding to the at least one group of heat damage tests based on the measured ambient temperature value;

[0137] The measured surface temperature value and the test environment temperature value are input into a preset data correction formula to obtain a surface correction temperature value corresponding to the target bumper.

[0138] The thermal damage test device for a vehicle bumper provided in the embodiment of the present application performs at least one set of thermal damage tests on the vehicle to be tested in a test state, and corrects the measured surface temperature values ​​corresponding to the target bumper at multiple test vehicle speeds obtained in the thermal damage test, so as to quickly find out whether the target bumper has a risk of overtemperature, and based on the thermal damage test data, infer the thermal damage performance of the target bumper at different temperatures and vehicle speeds, thereby improving the accuracy and efficiency of the thermal damage test of the vehicle bumper, and thereby reducing the risk of thermal damage to the vehicle bumper.

[0139] The embodiment of the present application also provides a vehicle, which can perform the above-mentioned Figure 1 as well as Figure 2 The specific implementation of the steps of the method for controlling the vehicle drive motor torque in the method embodiment shown can be found in the method embodiment, and will not be repeated here.

[0140] See also Figure 7 , Figure 7 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present application. Figure 5 As shown in , the electronic device 700 includes a processor 710 , a memory 720 and a bus 730 .

[0141] The memory 720 stores machine-readable instructions executable by the processor 710. When the electronic device 700 is running, the processor 710 communicates with the memory 720 via the bus 730. When the machine-readable instructions are executed by the processor 710, the above-mentioned Figure 1 as well as Figure 3 The specific implementation of the steps of the thermal damage test method for a vehicle bumper in the method embodiment shown can be found in the method embodiment, and will not be repeated here.

[0142] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 as well as Figure 3 The specific implementation of the steps of the thermal damage test method for a vehicle bumper in the method embodiment shown can be found in the method embodiment, and will not be repeated here.

[0143] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0144] In the several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. The device embodiments described above are merely schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some communication interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

[0145] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0146] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.

[0147] If the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a non-volatile computer-readable storage medium that is executable by a processor. Based on this understanding, the technical solution of the present application can essentially be embodied in the form of a software product, or in other words, the part that contributes to the prior art or the part of the technical solution. The computer software product is stored in a storage medium, including several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk.

[0148] Finally, it should be noted that the above-described embodiments are only specific implementation methods of the present application, which are used to illustrate the technical solutions of the present application, rather than to limit them. The protection scope of the present application is not limited thereto. Although the present application is described in detail with reference to the above-mentioned embodiments, ordinary technicians in the field should understand that any technician familiar with the technical field can still modify the technical solutions recorded in the above-mentioned embodiments within the technical scope disclosed in the present application, or can easily think of changes, or make equivalent replacements for some of the technical features therein; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A thermal damage test method for a vehicle bumper, characterized in that: The heat damage test method comprises: When the vehicle to be tested reaches a preset test state, based on at least one set of preset test condition parameters, controlling the vehicle to be tested to perform at least one set of heat damage tests in a test site; For each set of thermal damage tests, obtaining a measured surface temperature value corresponding to a target bumper installed in the vehicle to be tested at a test vehicle speed included in the test operating condition parameters; Based on the measured surface temperature value, a surface correction temperature value corresponding to the target bumper is obtained by using a preset data correction formula, and it is determined whether the surface correction temperature value is greater than a calibration temperature value; If not, it is determined that the target bumper meets the performance requirements corresponding to the thermal damage test.

2. The method according to claim 1, characterized in that The method further comprises: Based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, a thermal damage performance model of the target bumper is established using a preset linear equation expression to infer the thermal damage risk of the target bumper of the vehicle to be tested at different vehicle speeds.

3. The method according to claim 2, characterized in that The method of establishing a thermal damage performance model of the target bumper based on the surface corrected temperature value corresponding to the test vehicle speed in each set of thermal damage tests and using a preset linear equation expression includes: Establishing at least one test data group corresponding to the thermal damage test based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each set of thermal damage tests; Inputting the test data included in the test data group into a preset linear equation expression respectively to determine the coefficient value corresponding to the target bumper thermal damage performance model; Based on the coefficient value, a thermal damage performance model of the target bumper is established.

4. The method according to claim 1, characterized in that: For each set of thermal damage tests, obtaining the measured surface temperature value corresponding to the target bumper installed in the vehicle to be tested at the test vehicle speed included in the test operating condition parameters includes: Based on the test requirements corresponding to the preset test state, determining at least one temperature measurement point set on the surface of a target bumper installed in the vehicle to be tested; For each group of heat damage tests, obtaining a measured temperature value corresponding to the at least one temperature measuring point at a test vehicle speed included in the test operating condition parameters; Based on the quantitative relationship of the measured temperature values, a first measured temperature value is determined among the measured temperature values, and the first measured temperature value is determined as the measured surface temperature value corresponding to the target bumper at the test vehicle speed.

5. The method according to claim 1, characterized in that The method of obtaining the surface correction temperature value corresponding to the target bumper by using a preset data correction formula based on the measured surface temperature value includes: Obtaining a measured ambient temperature value corresponding to each group of heat damage tests, and determining a test ambient temperature value corresponding to the at least one group of heat damage tests based on the measured ambient temperature value; The measured surface temperature value and the test environment temperature value are input into a preset data correction formula to obtain a surface correction temperature value corresponding to the target bumper.

6. A thermal damage test device for a vehicle bumper, characterized in that: The thermal damage test device comprises: A heat damage test module, used for controlling the vehicle to be tested to perform at least one set of heat damage tests in a test site based on at least one set of preset test condition parameters when the vehicle to be tested reaches a preset test state; A temperature acquisition module, for acquiring, for each set of thermal damage tests, a measured surface temperature value of a target bumper installed in the vehicle to be tested corresponding to a test vehicle speed included in the test operating condition parameters; A correction judgment module, configured to obtain a surface correction temperature value corresponding to the target bumper based on the measured surface temperature value by using a preset data correction formula, and to judge whether the surface correction temperature value is greater than a calibration temperature value; The performance determination module is used to determine whether the target bumper meets the performance requirements corresponding to the thermal damage test if the surface correction temperature value is not greater than the calibration temperature value.

7. The heat damage test device according to claim 6, characterized in that: The thermal damage test device further comprises a model building module, wherein the model building module is used to: Based on the surface corrected temperature value corresponding to the target bumper at the test vehicle speed in each group of thermal damage tests, a thermal damage performance model of the target bumper is established using a preset linear equation expression to infer the thermal damage risk of the target bumper of the vehicle to be tested at different vehicle speeds.

8. A vehicle, characterized in that: A thermal damage test method for a vehicle bumper using any one of claims 1 to 5.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate through the bus, and the machine-readable instructions are executed by the processor to execute the steps of the thermal damage test method for a vehicle bumper as described in any one of claims 1 to 5.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the thermal damage test method for a vehicle bumper according to any one of claims 1 to 5 are executed.

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