Vehicle thermal protection test evaluation method, device, equipment and medium

Abstract

The invention provides a vehicle thermal protection test evaluation method, device and equipment and a medium, and relates to the technical field of whole vehicle test. The method comprises the steps of determining equivalent exposure time of an overtemperature part at least according to an overtemperature value, duration of the overtemperature value and a temperature target limit value; according to the working condition mileage of the overtemperature working condition and the full-life-cycle equivalent user driving mileage, the full-life-cycle equivalent user driving working condition cycle number is obtained; a full-life-cycle conversion coefficient corresponding to the overtemperature part is obtained at least based on the full-life-cycle equivalent user driving condition cycle number; according to the full-life-cycle conversion coefficient corresponding to the overtemperature part and the equivalent exposure time of the overtemperature part, the equivalent overtemperature duration of the full life cycle of the overtemperature part is obtained; and obtaining a thermal protection test evaluation result of the over-temperature part based on the equivalent over-temperature duration of the full life cycle of the over-temperature part and the time target limit value of the over-temperature part so as to more accurately evaluate the thermal protection risk of the part.

Description

Technical Field

[0001] The present invention relates to the technical field of whole vehicle testing, and in particular to a vehicle thermal protection test evaluation method, device, equipment and medium. Background Art

[0002] With the increasing complexity of automotive powertrains (such as hybrids) and the increasing integration of components, the heat load within the engine compartment and under the chassis has increased significantly. Excessively high temperatures can accelerate component aging and even pose a risk of spontaneous combustion. Therefore, vehicle thermal protection testing and verification, as a crucial step in verifying vehicle thermal protection performance, must undergo rigorous testing and evaluation before products are released to the market.

[0003] Currently, the evaluation of vehicle thermal protection test results relies solely on a single dimension, which has the following significant flaws: First, due to insufficient evaluation dimensions and limited accuracy of calculation results, test results may be misjudged; second, it affects decision-making efficiency, and requires a large amount of human resources to re-verify some components (such as after-sales risk assessment and rectification necessity analysis); third, it increases additional rectification costs, including program changes and verification costs; finally, it may lead to design redundancy, that is, designers excessively increase temperature target values ​​to ensure reliability and select materials with better temperature resistance, thereby increasing costs. Summary of the Invention

[0004] The present invention provides a vehicle thermal protection test evaluation method, device, equipment and medium, aiming to overcome the above-mentioned problems or at least partially solve the above-mentioned problems.

[0005] A first aspect of the present invention provides a vehicle thermal protection test evaluation method, the method comprising: determining an equivalent exposure time of the over-temperature component based on at least an over-temperature value of the over-temperature component of the vehicle under an over-temperature condition in a thermal protection test, a duration during which the over-temperature component remains at the over-temperature value under the over-temperature condition in the thermal protection test, and a target temperature limit of the over-temperature component; Based on the user driving data, the user's mileage ratio under the over-temperature condition is obtained; Based on the total life cycle mileage of the vehicle and the user mileage ratio, obtaining the life cycle equivalent user mileage under the over-temperature condition; Obtaining a life cycle equivalent user driving cycle number under the over-temperature condition based on the operating mileage of the over-temperature condition in the thermal protection test and the life cycle equivalent user driving mileage; Obtaining a life cycle conversion coefficient corresponding to the over-temperature component based at least on the life cycle equivalent user driving condition cycle number; Obtaining an equivalent over-temperature duration of the over-temperature component's full life cycle based on the full life cycle conversion coefficient corresponding to the over-temperature component and the equivalent exposure time of the over-temperature component; The equivalent over-temperature duration of the over-temperature component throughout its life cycle is compared with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

[0006] A second aspect of the present invention provides a vehicle thermal protection test and evaluation device, the device comprising: a first time determination module, configured to determine an equivalent exposure time of the over-temperature component based on at least an over-temperature value of the over-temperature component of the vehicle under an over-temperature condition in a thermal protection test, a duration during which the over-temperature component remains at the over-temperature value under the over-temperature condition in the thermal protection test, and a target temperature limit of the over-temperature component; A first proportion determination module is used to obtain a proportion of user mileage under the over-temperature condition based on user driving data; A first determining module is configured to obtain a life cycle equivalent user mileage under the over-temperature condition based on the total life cycle mileage of the vehicle and the user mileage ratio; a cycle number determination module, configured to obtain a life cycle equivalent user driving condition cycle number under the over-temperature condition based on the condition mileage of the over-temperature condition in the thermal protection test and the life cycle equivalent user driving mileage; a coefficient determination module, configured to obtain a full life cycle conversion coefficient corresponding to the over-temperature component based at least on the full life cycle equivalent user driving condition cycle number; A second time determination module is configured to obtain an equivalent over-temperature duration of the over-temperature component's full life cycle based on a full life cycle conversion coefficient corresponding to the over-temperature component and an equivalent exposure time of the over-temperature component; The test evaluation module is used to compare the equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

[0007] The third aspect of the present invention provides an electronic device, which includes: a memory, a processor, and a computer program stored in the memory and running on the processor. When the computer program is executed by the processor, it implements the vehicle thermal protection test evaluation method as described in the first aspect of the present invention.

[0008] A fourth aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon. When the computer program is executed by a processor, the vehicle thermal protection test evaluation method of the first aspect of the present invention is implemented.

[0009] A fifth aspect of the present invention provides a computer program product, comprising a computer program, which, when executed by a processor, implements the vehicle thermal protection test evaluation method as described in the first aspect of the present invention.

[0010] In the vehicle thermal protection test evaluation method provided by the present invention, after the vehicle is subjected to a thermal protection test, first, based on at least the over-temperature value of the vehicle's over-temperature components under the over-temperature condition in the thermal protection test, the duration of the over-temperature component being at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component, the equivalent exposure time of the over-temperature component is obtained; secondly, based on user driving data, the proportion of user mileage under the over-temperature condition is obtained; based on the total mileage of the vehicle over its entire life cycle and the proportion of user mileage, the equivalent user mileage over its entire life cycle under the over-temperature condition is obtained; thereby, based on the thermal protection test, the equivalent user mileage over its entire life cycle under the over-temperature condition is obtained. The operating mileage of the over-temperature condition in the protection test and the equivalent user driving mileage over the entire life cycle are used to obtain the equivalent user driving condition cycle number under the over-temperature condition; then, based on at least the equivalent user driving condition cycle number over the entire life cycle, the corresponding life cycle conversion coefficient of the over-temperature component is obtained; then, according to the corresponding life cycle conversion coefficient of the over-temperature component and the equivalent exposure time of the over-temperature component, the equivalent over-temperature duration of the over-temperature component over its entire life cycle is obtained; finally, the equivalent over-temperature duration of the over-temperature component over its entire life cycle is compared with the time target limit of the over-temperature component to obtain the thermal protection test evaluation result of the over-temperature component. Thus, when evaluating thermal protection tests, the present invention uses at least multiple data sources, including temperature information from the thermal protection test, user driving data, and thermal protection test condition information, to introduce a time dimension. Using a lifecycle conversion coefficient derived from the lifecycle equivalent user driving condition cycle number under overheating conditions, the thermal protection test results of overheated components are calculated to correlate with their actual lifecycle usage. Furthermore, the thermal protection test is evaluated based on the equivalent lifecycle usage of the overheated components. This allows for more accurate quantification of the thermal aging effects of components over the vehicle's lifecycle, enabling a more comprehensive assessment of component thermal protection risks from both temperature and time perspectives. This avoids misjudgments resulting from a single evaluation dimension, as well as risk assessments and unnecessary rectification verifications due to component overheating. This improves the accuracy and comprehensiveness of test evaluations, resulting in higher reliability and durability for vehicles shipped after evaluation using the vehicle thermal protection test evaluation method provided by the present invention. This, in turn, improves vehicle safety, reduces the risk of failures during driving, and reduces vehicle expenses and maintenance costs. Furthermore, through more accurate risk assessment, the present invention avoids the additional costs associated with overdesign or design redundancy. For example, traditional evaluation methods may lead to unnecessary modification or replacement of certain components due to misjudgment, while the present invention can more accurately assess the thermal protection risk of components, thereby reducing material waste and design modification costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0012] Figure 1 This is a flow chart of a vehicle thermal protection test evaluation method according to one embodiment of the present invention; Figure 2 This is a workflow diagram of a vehicle thermal protection test evaluation system provided by the present invention; Figure 3 This is an operational flow chart of meteorological big data mining provided by the present invention; Figure 4 This is an operational flow chart of user driving big data mining provided by the present invention; Figure 5 This is an operational flow chart for establishing a thermal protection test information database provided by the present invention; Figure 6 This is an operational flow chart for establishing a component material performance database provided by the present invention; Figure 7 This is an operational flow chart of thermal protection test data processing provided by the present invention; Figure 8 This is an operational flow chart of a component thermal protection risk assessment provided by the present invention; Figure 9 This is a structural block diagram of a vehicle thermal protection test and evaluation device provided by one embodiment of the present invention; Figure 10 FIG. 1 is a schematic diagram of an electronic device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The following describes the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art will readily appreciate the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the various details in this specification may be modified or altered based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are intended only to illustrate the present invention and are not intended to limit the scope of protection of the present invention.

[0014] In one embodiment, reference Figure 1 , Figure 1 FIG. 1 is a flow chart showing a vehicle thermal protection test evaluation method according to an embodiment of the present invention. Figure 1As shown, the vehicle thermal protection test evaluation method provided by the first aspect of the embodiment of the present invention may include the following steps: Step S11: Determine the equivalent exposure time of the over-temperature component based at least on the over-temperature value of the over-temperature component of the vehicle under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component.

[0015] In this embodiment, after a vehicle undergoes a thermal protection test, for any overheated components that overheat during the test, not only the overtemperature value of the component under the overtemperature condition during the thermal protection test is obtained, but also the duration that the component remained at the overtemperature value under the overtemperature condition during the thermal protection test. In this embodiment, each vehicle component has a corresponding target temperature limit, which represents the component's corresponding maximum operating temperature.

[0016] In this embodiment, the equivalent exposure time of an overheated component can be determined based on at least the acquired overtemperature value of an overheated component of a vehicle under overtemperature conditions during a thermal protection test, the duration that the overheated component remains at the overtemperature value during the overtemperature condition during the thermal protection test, and the target temperature limit of the overheated component. The equivalent exposure time of an overheated component represents the equivalent exposure time calculated by comparing the thermal protection test result of the overheated component with the target temperature limit. In other words, the equivalent exposure time is the duration that the overheated component remains at the overtemperature value during the thermal protection test, which is equivalent to the duration that the overheated component remains at the target temperature limit. For example, if the overtemperature value of an overheated component during a thermal protection test is 110 degrees Celsius, the duration that the component remains at the overtemperature value is 1 minute, and the target temperature limit of the component is 100 degrees Celsius, then an overtemperature of the component at 110 degrees Celsius for 1 minute is equivalent to an overtemperature of 100 degrees Celsius for x minutes, where x is the equivalent exposure time in this embodiment.

[0017] Step S12: Based on the user driving data, obtain the user's mileage ratio under the over-temperature condition.

[0018] In this embodiment, summer-specific user driving data (i.e., big user driving data) can be obtained, for example, by obtaining desensitized data from a car cloud platform (with sensitive user data such as the vehicle VIN and GPS obscured) or by installing a dashcam directly on the vehicle. This user driving data includes at least multiple vehicle IDs and the time, speed, acceleration, slope, mileage, and other data corresponding to each of the multiple vehicle IDs. In this embodiment, the user driving data is obtained with the user's consent.

[0019] This embodiment can determine the percentage of user mileage driven under over-temperature conditions based on the user's driving data. Specifically, the percentage of user mileage driven under over-temperature conditions can be obtained by dividing the total mileage of all vehicles in the user's driving data driven under over-temperature conditions by the total mileage of all vehicles in the user's driving data.

[0020] For example, if the over-temperature condition is a high-speed condition, and the user driving data includes driving data of 10,000 vehicles, the total mileage of each vehicle under the high-speed condition can be determined based on the user driving data, and the total mileage of each vehicle can be determined. Then, the sum of the total mileage of the 10,000 vehicles under the high-speed condition is divided by the sum of the total mileage of the 10,000 vehicles to obtain the proportion of user mileage under the over-temperature condition (high-speed condition).

[0021] In an optional example, the mileage data of each vehicle (such as each vehicle ID) at different speeds and slopes can be determined based on user driving data; and the target speed range and target slope range corresponding to the over-temperature condition can be determined, so that the mileage of each vehicle under the over-temperature condition can be obtained based on the mileage data of each vehicle at different speeds and slopes, as well as the target speed range and target slope range, and the total mileage of all vehicles under the over-temperature condition can be obtained.

[0022] Step S13: Based on the total mileage of the vehicle over its entire life cycle and the user mileage ratio, obtain the equivalent user mileage over its entire life cycle under the over-temperature condition.

[0023] In this embodiment, each vehicle is factory-designed with a corresponding lifetime mileage, representing the maximum total mileage the vehicle can safely travel over its lifetime. This embodiment can calculate the lifetime equivalent user mileage under over-temperature conditions based on the vehicle's lifetime mileage and the determined percentage of user mileage under over-temperature conditions. For example, the lifetime equivalent user mileage under over-temperature conditions can be calculated by multiplying the vehicle's lifetime mileage by the percentage of user mileage under over-temperature conditions.

[0024] Step S14: obtaining the life cycle equivalent user driving condition cycle number under the over-temperature condition according to the operating mileage of the over-temperature condition in the thermal protection test and the life cycle equivalent user driving mileage.

[0025] In this embodiment, based on the thermal protection test conducted on the vehicle, the over-temperature condition of the vehicle during the thermal protection test and the operating mileage of the over-temperature condition during the thermal protection test can also be determined. Then, based on the operating mileage of the vehicle during the over-temperature condition during the thermal protection test and the vehicle's lifetime equivalent user driving mileage under over-temperature conditions, the vehicle's lifetime equivalent user driving cycle number under over-temperature conditions is determined. The lifetime equivalent user driving cycle number under over-temperature conditions is a value greater than 1. The lifetime equivalent user driving cycle number is the number of over-temperature cycles in the thermal protection test equivalent to the driving mileage that meets the over-temperature condition during the vehicle's lifetime. In an optional example, the lifetime equivalent user driving cycle number is the equivalent cycle number obtained by dividing the vehicle's lifetime driving mileage that meets the over-temperature condition (the vehicle's lifetime equivalent user driving mileage under over-temperature conditions) by the single cycle mileage of the over-temperature condition (the vehicle's operating mileage under over-temperature conditions during the thermal protection test). In an optional example, the equivalent user driving mileage of the vehicle under over-temperature conditions during its entire life cycle can be divided by the operating mileage of the vehicle under over-temperature conditions in a thermal protection test to obtain the equivalent user driving condition cycle number of the vehicle under over-temperature conditions during its entire life cycle.

[0026] Step S15: obtaining a full life cycle conversion coefficient corresponding to the over-temperature component based at least on the full life cycle equivalent user driving condition cycle number.

[0027] In this embodiment, the full life cycle conversion coefficient corresponding to the over-temperature component can be determined at least based on the obtained full life cycle equivalent user driving condition cycle number. The full life cycle conversion coefficient represents the conversion relationship between the over-temperature condition of the over-temperature component in the thermal protection test and the over-temperature condition of the over-temperature component in the full life cycle.

[0028] Step S16: Obtaining the equivalent over-temperature duration of the over-temperature component's full life cycle based on the full life cycle conversion coefficient corresponding to the over-temperature component and the equivalent exposure time of the over-temperature component.

[0029] In this embodiment, the equivalent overtemperature duration of the overtemperature component's lifecycle can be determined based on the lifecycle conversion coefficient corresponding to the overtemperature component and the equivalent exposure time of the overtemperature component. The equivalent overtemperature duration of the overtemperature component's lifecycle is: the duration of overtemperature during which the overtemperature component experiences overtemperature under overtemperature conditions throughout its lifecycle.

[0030] In this embodiment, user driving data is used as a reference dimension for converting the equivalent over-temperature duration. An intermediate parameter for calculating the full life cycle conversion coefficient can be obtained based on the user driving data, thereby determining the equivalent over-temperature duration of the full life cycle.

[0031] Step S17: Compare the equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

[0032] In this embodiment, each component of the vehicle has a corresponding time target limit, which limits the maximum operating time of the component when it is overheated. In this embodiment, the thermal protection test evaluation result of the overheated component can be obtained by comparing the equivalent overheating time of the overheated component throughout its life cycle with the time target limit of the overheated component. In an optional example, when the equivalent overheating time of the overheated component throughout its life cycle is greater than the time target limit of the overheated component, the thermal protection test evaluation result of the overheated component is that the overheated component is at risk; when the equivalent overheating time of the overheated component throughout its life cycle is not greater than the time target limit of the overheated component, the thermal protection test evaluation result of the overheated component is that the overheated component is not at risk.

[0033] In this embodiment, when evaluating a thermal protection test, based on at least multiple data sources, including temperature information from the thermal protection test, user driving data, and thermal protection test condition information, a time dimension is introduced. A lifecycle conversion coefficient, derived from the lifecycle equivalent number of user driving condition cycles under over-temperature conditions, is used to calculate the equivalent time between the thermal protection test results of over-temperature components and their actual use over the vehicle's lifecycle. The thermal protection test is then evaluated based on the equivalent time of the over-temperature components' actual use over the vehicle's lifecycle (i.e., the equivalent over-temperature duration of the over-temperature components' lifecycle). This allows for more accurate quantification of the thermal aging effects of components over the vehicle's lifecycle, a more comprehensive assessment of component thermal protection risks from both temperature and time perspectives, and avoids misjudgments resulting from a single evaluation dimension. It also avoids risk discussions and unnecessary rectification verifications due to component over-temperature, thereby improving the accuracy and comprehensiveness of the test evaluation. Vehicles evaluated using the vehicle thermal protection test evaluation method provided in this embodiment exhibit higher reliability and durability, thereby improving vehicle safety, reducing the risk of vehicle failures during driving, and lowering vehicle expenses and maintenance costs. Furthermore, through more accurate risk assessment, the present invention can avoid the additional costs caused by overdesign or design redundancy. For example, traditional evaluation methods may misjudge and lead to unnecessary modification or replacement of certain components. However, the present invention can more accurately assess component thermal protection risks, thereby reducing material waste and design modification costs.

[0034] In conjunction with the above embodiments, in one embodiment, the first aspect of the present invention further provides a vehicle thermal protection test evaluation method. In this method, in addition to the above steps, steps S21 to S23 may also be included, and the above step S15 may specifically include step S24: Step S21: Based on meteorological data, obtain a high temperature day in which the maximum daily temperature of the target city reaches the test temperature threshold of the thermal protection test.

[0035] In this embodiment, in addition to obtaining user driving data, meteorological data (i.e., big meteorological data) can also be obtained through weather acquisition platforms such as weather websites. This meteorological data includes at least daily and hourly meteorological data for all cities over the past N years. Based on this meteorological data and a preset thermal protection test temperature threshold, the city with the most cumulative days reaching this test temperature threshold is selected as the target city. After the target city is determined, the target city's meteorological big data is used to determine the high-temperature days on which the target city's maximum daily temperature reaches the thermal protection test temperature threshold, where N is an integer greater than 1.

[0036] Step S22: According to the high-temperature days corresponding to the target city, the annual average proportion of high-temperature days in the target city is obtained.

[0037] In this embodiment, after obtaining the target city's corresponding high-temperature days (i.e., high-temperature days in which the target city's maximum daily temperature reaches the test temperature threshold for the thermal protection test), the target city's annual average percentage of high-temperature days can be calculated based on the target city's corresponding high-temperature days. For example, if the target city has a total of 150 high-temperature days over the past N years, the target city's annual average percentage of high-temperature days is 150 / (365*N).

[0038] Step S23: according to the high temperature periods of the target city on high temperature days when the temperature reaches the test temperature threshold, the average proportion of the high temperature periods of the target city is obtained.

[0039] In this embodiment, after determining the high temperature days corresponding to the target city, a statistical analysis can be performed on the high temperature periods of the target city during which the temperature reaches the test temperature threshold, to obtain the average proportion of the target city's daily high temperature periods, that is, the average proportion of the high temperature periods of the target city during which the temperature reaches the test temperature threshold. For example, if the target city has a total of 150 high temperature days in the past N years, the proportion of the daily high temperature period for each of the 150 days is calculated (e.g., if the daily high temperature period on a high temperature day is 5 hours, then the daily high temperature period proportion on the high temperature day is 5 / 24), and then the daily high temperature period proportions corresponding to each of the 150 days are averaged to obtain the average proportion of the daily high temperature period for the target city.

[0040] Step S24: Obtain a full life cycle conversion coefficient corresponding to the over-temperature component based at least on the full life cycle equivalent user driving condition cycle number, the annual average proportion of high temperature days in the target city, and the average proportion of daily high temperature periods in the target city.

[0041] In this embodiment, after obtaining the average annual proportion of high-temperature days in the target city and the average proportion of daily high-temperature time periods in the target city, the corresponding life cycle conversion coefficient of the over-temperature component can be obtained based at least on the number of equivalent user driving condition cycles under over-temperature conditions throughout the life cycle, the average annual proportion of high-temperature days in the target city, and the average proportion of daily high-temperature time periods in the target city.

[0042] In an optional example, the full life cycle conversion coefficient corresponding to the over-temperature component = the number of equivalent user driving condition cycles in the full life cycle * the average annual proportion of high-temperature days in the target city * the average proportion of daily high-temperature periods in the target city.

[0043] In this embodiment, meteorological data serves as another reference dimension for converting the equivalent over-temperature duration. Based on the meteorological data, at least two other intermediate parameters for calculating the full life cycle conversion coefficient can be obtained, and then the equivalent over-temperature duration of the full life cycle can be determined by combining the meteorological data and the user driving data.

[0044] In this embodiment, when designing the full life cycle conversion coefficient corresponding to over-temperature components, in addition to fully considering the actual use of the vehicle under over-temperature conditions throughout its life cycle based on user driving big data, thermal protection test mileage and vehicle design mileage, the external temperature, which has a greater impact on the actual use of vehicle components throughout their life cycle, will also be fully considered based on meteorological big data, so as to improve the accuracy of the full life cycle conversion coefficient, thereby further improving the assessment of the thermal protection risk of components.

[0045] In conjunction with the above embodiments, in one embodiment, the first aspect of the present invention further provides a vehicle thermal protection test evaluation method. In this method, in addition to the above steps, steps S31 to S33 may also be included, and the above step S15 may specifically include step S34: Step S31: Based on the user driving data and the daily high temperature period range interval corresponding to the daily high temperature period, obtain the user's mileage in the daily high temperature period range interval under the over-temperature condition.

[0046] In this embodiment, the mileage data of each vehicle (e.g., each vehicle ID) in different time periods, at different speeds, and at different slopes can be determined based on the user driving data; and the target speed range and target slope range corresponding to the over-temperature condition can be determined. Thus, based on the mileage data of each vehicle in different time periods, at different speeds, and at different slopes, as well as the target speed range and target slope range, the user mileage of each vehicle in the over-temperature condition in different time periods can be obtained.

[0047] In this embodiment, the months in which high-temperature days occur in the target city are also analyzed to obtain the target city's high-temperature months (i.e., the months with the most high-temperature days). Based on the meteorological data corresponding to the target city's high-temperature months, the average maximum temperature for different time periods of the day (divided by hour) is statistically calculated time period by time. Then, based on the obtained average proportion of daily high-temperature periods in the target city and the average maximum temperatures for different time periods of the day, the daily high-temperature period range corresponding to the daily high-temperature period is determined. The daily high-temperature period range corresponding to the daily high-temperature period is defined as the consecutive time periods that rank highest in descending order of average maximum temperature and meet the average proportion of daily high-temperature periods. For example, if the average proportion of daily high-temperature periods is 5 / 24, then the time periods that rank in descending order of average maximum temperature within the 24-hour period are: 14:00, 15:00, 16:00, 12:00, and 18:00. Since 14:00, 15:00, and 16:00 are consecutive time periods, the daily high-temperature period range corresponding to the daily high-temperature period is: 14:00-16:00.

[0048] After obtaining the user driving data, this embodiment can determine the user mileage of each vehicle in the over-temperature condition in the daily high temperature period range interval based on the user mileage of each vehicle in the over-temperature condition in different time periods obtained from the user driving data, and the daily high temperature period range interval corresponding to the daily high temperature period.

[0049] Among them, the high temperature days of the target city in this embodiment are the high temperature days corresponding to the target city in the above embodiment, and the average proportion of daily high temperature time periods in the target city in this embodiment is the average proportion of daily high temperature time periods in the target city in the above embodiment. The methods for determining the high temperature days of the target city and the average proportion of daily high temperature time periods in the target city can refer to the above embodiment.

[0050] Step S32: Based on the user's driving mileage in the daily high temperature period range under the over-temperature condition, obtain the user's vehicle usage data in the daily high temperature period range.

[0051] In this embodiment, after determining the user mileage corresponding to each vehicle in the daily high temperature period range under over-temperature conditions, user vehicle usage data within the daily high temperature period range can be obtained based on the user mileage corresponding to each vehicle in the daily high temperature period range under over-temperature conditions. For example, if the user mileage of a vehicle in the daily high temperature period range under over-temperature conditions is greater than 1 km, it is determined that the vehicle is driven by the user within the daily high temperature period range; otherwise, it is determined that the vehicle is not driven by the user within the daily high temperature period range. The user vehicle usage data within the daily high temperature period range in this embodiment is: the total number of vehicles driven by users within the daily high temperature period range.

[0052] Step S33: Based on the user car usage data and the user driving data within the daily high temperature period range, obtain the average car usage ratio during the daily high temperature period.

[0053] In this embodiment, after obtaining the user vehicle usage data within the daily high temperature period range, the average vehicle usage percentage during the daily high temperature period can be determined based on the user vehicle usage data and the user driving data within the daily high temperature period range. For example, the user vehicle usage data within the daily high temperature period range can be divided by the total number of vehicles in the user driving data to obtain the average vehicle usage percentage during the daily high temperature period.

[0054] Step S34: Based at least on the full life cycle equivalent user driving condition cycle number and the average vehicle usage ratio during the daily high temperature period, obtain the full life cycle conversion coefficient corresponding to the over-temperature component.

[0055] In this embodiment, a lifecycle conversion coefficient corresponding to the over-temperature component can be obtained based on at least the lifecycle equivalent user driving cycle number under over-temperature conditions and the average vehicle usage percentage during high-temperature periods. In one optional example, the lifecycle conversion coefficient corresponding to the over-temperature component = the lifecycle equivalent user driving cycle number under over-temperature conditions * the average vehicle usage percentage during high-temperature periods.

[0056] In this embodiment, when designing the full life cycle conversion coefficient corresponding to over-temperature components, in addition to fully considering the actual usage of the vehicle throughout its life cycle based on user driving big data, the external temperature, which has a greater impact on the actual use of vehicle components throughout their life cycle, is also fully considered based on meteorological big data, so as to further improve the accuracy of the full life cycle conversion coefficient, thereby improving the assessment of the thermal protection risk of components.

[0057] In conjunction with the above embodiments, in one embodiment, the first aspect of the present invention further provides a vehicle thermal protection test evaluation method. In this method, in addition to the above steps, steps S41 to S43 may also be included, and the above step S24 may specifically include step S44: Step S44: Based on the full life cycle equivalent user driving condition cycle number, the annual average proportion of high temperature days in the target city, the average proportion of daily high temperature periods in the target city, and the average proportion of vehicle use in the daily high temperature periods, the full life cycle conversion coefficient corresponding to the over-temperature component is obtained.

[0058] In this embodiment, after obtaining the full life cycle equivalent user driving condition cycle number under over-temperature conditions, the target city's average annual proportion of high-temperature days, the target city's average daily high-temperature period proportion and the average vehicle usage proportion during the daily high-temperature period, the full life cycle conversion coefficient corresponding to the over-temperature component can be obtained based on the full life cycle equivalent user driving condition cycle number under over-temperature conditions, the target city's average annual proportion of high-temperature days, the target city's average daily high-temperature period proportion and the average vehicle usage proportion during the daily high-temperature period.

[0059] In an optional example, the full life cycle conversion coefficient corresponding to the over-temperature component = the number of equivalent user driving cycle cycles under over-temperature conditions in the full life cycle * the average annual proportion of high-temperature days in the target city * the average proportion of daily high-temperature periods in the target city * the average proportion of vehicles used during daily high-temperature periods.

[0060] In this embodiment, when designing the full life cycle conversion coefficient corresponding to over-temperature components, not only is the outside temperature, which has a greater impact on the actual use of vehicle components throughout the life cycle, fully considered based on meteorological big data, and the actual use of the vehicle throughout the life cycle is fully considered based on user driving big data, but also the actual use of the vehicle under over-temperature conditions throughout the life cycle is fully considered based on user driving big data, thermal protection test mileage and vehicle design mileage, thereby maximizing the accuracy of the full life cycle conversion coefficient and improving the assessment of the thermal protection risk of components.

[0061] In combination with any of the above embodiments, in one embodiment, the first aspect of the present invention further provides a vehicle thermal protection test evaluation method. In this method, in addition to the above steps, steps S51 to S53 may also be included: Step S51: obtaining the maximum temperature of each test component of the vehicle under each thermal protection test condition in the thermal protection test according to the thermal protection test original data file.

[0062] In this embodiment, after a vehicle undergoes a thermal protection test, a thermal protection test raw data file is generated. This raw data file includes at least the vehicle speed and test temperature data for all test components during the thermal protection test, at a frequency of 1 Hz. Test components are components with sensors specifically positioned during the thermal protection test. In this embodiment, thermal protection test conditions can be distinguished based on the vehicle speed in the raw data file. This allows the maximum temperature of each test component during each thermal protection test condition to be determined based on the test temperature data for all test components in the raw data file. A thermal protection test condition is the operating condition during the thermal protection test.

[0063] Step S52: Compare the maximum temperature corresponding to each test component with the temperature target limit of the test component to obtain the over-temperature component.

[0064] In this embodiment, after obtaining the maximum temperature of each test component of the vehicle in each thermal protection test condition in the thermal protection test, the maximum temperature of each test component of the vehicle in each thermal protection test condition in the thermal protection test is compared with the temperature target limit of the test component. As long as the maximum temperature of a thermal protection test condition of the test component in the thermal protection test exceeds the temperature target limit of the test component, it can be determined that the test component is an over-temperature component.

[0065] Step S53: The thermal protection test condition corresponding to the over-temperature component in the thermal protection test is determined as the over-temperature condition.

[0066] In this embodiment, after determining the over-temperature component, when the over-temperature component corresponds to only one thermal protection test condition in the thermal protection test, the thermal protection test condition corresponding to the over-temperature component in the thermal protection test can be determined as the over-temperature condition; when the over-temperature component corresponds to multiple thermal protection test conditions in the thermal protection test, the over-temperature component corresponds to multiple thermal protection test conditions in the thermal protection test, each of which has a maximum temperature corresponding to each of the multiple thermal protection test conditions, and the thermal protection test condition corresponding to the maximum temperature of the over-temperature component that exceeds the temperature target limit of the component can be determined as the over-temperature condition. For example, in the thermal protection test, over-temperature component A corresponds to three working conditions: working condition 1, working condition 2, and working condition 3. The maximum temperature corresponding to working condition 1 is 110 degrees Celsius, the maximum temperature corresponding to working condition 2 is 90 degrees Celsius, and the maximum temperature corresponding to working condition 3 is 102 degrees Celsius. When the temperature target limit of over-temperature component A is 100 degrees Celsius, working condition 1 and working condition 3 are both over-temperature conditions corresponding to over-temperature component A, that is, over-temperature component A corresponds to two over-temperature conditions.

[0067] In this embodiment, the highest temperature of the over-temperature component under the over-temperature condition in the thermal protection test is the over-temperature temperature value of the over-temperature component under the over-temperature condition in the thermal protection test.

[0068] In combination with any of the above embodiments, in one embodiment, when there are multiple over-temperature conditions corresponding to an over-temperature component, the equivalent over-temperature duration of the over-temperature component in the entire life cycle under each over-temperature condition can be determined for each over-temperature condition corresponding to the over-temperature component through the above steps, and then the equivalent over-temperature duration of the over-temperature component in the entire life cycle under each over-temperature condition is summed up and compared with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component. In an optional example, when the result of summing up the equivalent over-temperature duration of the over-temperature component in the entire life cycle under each over-temperature condition is greater than the time target limit of the over-temperature component, the thermal protection test evaluation result of the over-temperature component is that the over-temperature component is at risk; when the result of summing up the equivalent over-temperature duration of the over-temperature component in the entire life cycle under each over-temperature condition is not greater than the time target limit of the over-temperature component, the thermal protection test evaluation result of the over-temperature component is that the over-temperature component is not at risk.

[0069] In combination with any of the above embodiments, in one embodiment, the vehicle includes multiple over-temperature components. For each over-temperature component, the thermal protection test evaluation result of each over-temperature component can be determined through the above steps, thereby realizing the evaluation of the thermal protection test of the entire vehicle based on the entire life cycle of the vehicle.

[0070] In combination with any of the above embodiments, in one embodiment, the first aspect of the present invention further provides a vehicle thermal protection test evaluation method. In this method, in addition to the above steps, step S61 may be included, and step S11 may specifically include step S62: Step S61: querying the component material performance database to obtain the material activation energy of the over-temperature component.

[0071] In this embodiment, a component material properties database is pre-established. This database includes material property data for each component, including at least the material activation energy of the component. Based on this, after determining an overheated component, this embodiment can query the component material properties database based on the overheated component to obtain the material activation energy of the overheated component.

[0072] Step S62: Determine the equivalent exposure time of the over-temperature component based on the material activation energy of the over-temperature component, the over-temperature temperature value of the over-temperature component under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component.

[0073] In this embodiment, the equivalent exposure time of the over-temperature component can be determined based on the material activation energy of the over-temperature component, the over-temperature temperature value of the over-temperature component under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component.

[0074] In this embodiment, the thermal protection test evaluation for over-temperature components also takes into account the material properties of the over-temperature components (i.e., material activation energy). In this way, at least multiple factors such as meteorological conditions, thermal protection test operating condition data, and component material properties can be comprehensively considered to accurately evaluate the thermal protection risk of components throughout the vehicle's life cycle.

[0075] In combination with the above embodiments, in an optional embodiment, the equivalent exposure time of the over-temperature component can be determined based on the material activation energy of the over-temperature component, the ideal gas constant, the over-temperature value of the over-temperature component under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component.

[0076] In an optional example, the equivalent exposure time of the overheated component can be determined by the following formula: : ; in, It is the over-temperature value of the over-temperature component under the over-temperature condition in the thermal protection test, unit K; is the duration that the over-temperature component remains at the over-temperature value under over-temperature conditions in the thermal protection test; E is the material activation energy of the over-temperature component, in J / mol; R is the ideal gas constant, 8.314 J / (mol·K); is the target temperature limit of the over-temperature component, in K. It should be noted that the above formula is only an example, and this embodiment does not limit the specific method of determining the equivalent exposure time of the over-temperature component based on the above factors.

[0077] In combination with the above embodiments, in a specific optional implementation, the equivalent over-temperature duration of the entire life cycle of the over-temperature component can be determined by the following formula: : ; in, is the equivalent exposure time of over-temperature components, TL is the total mileage of the vehicle's entire life cycle, in km; TR is the user's mileage ratio under over-temperature conditions; TT is the operating mileage of over-temperature conditions in the thermal protection test, in km; then The equivalent user driving cycle number for the entire life cycle under over-temperature conditions; is the annual average proportion of high temperature days in the target city; The average proportion of daily high temperature periods in the target city; The average proportion of vehicles used during the high temperature period of the day; It should be noted that the above formula is only an example, and this embodiment does not limit the specific method of determining the equivalent over-temperature duration of the over-temperature component's full life cycle based on the above factors.

[0078] In conjunction with any of the above embodiments, in one embodiment, the first aspect of the present invention further provides a vehicle thermal protection test evaluation method. In this method, the target temperature limit includes a short-term target temperature limit and a long-term target temperature limit. Based on this, the equivalent exposure time for overheated components includes a short-term equivalent exposure time for the overheated components determined based on the short-term target temperature limit for the overheated components, and / or a long-term equivalent exposure time for the overheated components determined based on the long-term target temperature limit for the overheated components.

[0079] The short-term equivalent exposure time of the over-temperature component is determined based on at least the over-temperature value of the over-temperature component under the over-temperature condition of the thermal protection test, the duration that the over-temperature component remains at the over-temperature value under the over-temperature condition of the thermal protection test, and the short-term target temperature limit of the over-temperature component. The long-term equivalent exposure time of the over-temperature component is determined based on at least the over-temperature value of the over-temperature component under the over-temperature condition of the thermal protection test, the duration that the over-temperature component remains at the over-temperature value under the over-temperature condition of the thermal protection test, and the long-term target temperature limit of the over-temperature component. The specific determination method is the same or similar to that of the aforementioned embodiment and will not be further described.

[0080] In addition, in this embodiment, the equivalent over-temperature duration of the over-temperature component throughout its life cycle includes: the short-term equivalent over-temperature duration of the over-temperature component throughout its life cycle determined based on the short-term equivalent exposure time of the over-temperature component, and / or the long-term equivalent over-temperature duration of the over-temperature component throughout its life cycle determined based on the long-term equivalent exposure time of the over-temperature component.

[0081] The short-term equivalent overtemperature duration of the overtemperature component's lifecycle can be determined based on the full lifecycle conversion coefficient corresponding to the overtemperature component and the short-term equivalent exposure time of the overtemperature component. Furthermore, the long-term equivalent overtemperature duration of the overtemperature component's lifecycle can be determined based on the full lifecycle conversion coefficient corresponding to the overtemperature component and the long-term equivalent exposure time of the overtemperature component. The specific determination method is the same or similar to that in the previous embodiment and will not be further described.

[0082] Furthermore, in this embodiment, the above step S17 may specifically include step S71: Step S71: Compare the short-term equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the short-term time target limit of the over-temperature component, and / or compare the long-term equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the long-term time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

[0083] In this embodiment, the short-term equivalent over-temperature duration of the over-temperature component throughout its life cycle can be compared with the short-term time target limit of the over-temperature component, and / or the long-term equivalent over-temperature duration of the over-temperature component throughout its life cycle can be compared with the long-term time target limit of the over-temperature component to obtain the thermal protection test evaluation results of the over-temperature component.

[0084] In one embodiment, if Figure 2 As shown, Figure 2 This is a workflow diagram of a vehicle thermal protection test evaluation system provided by the present invention. Figure 2 The vehicle thermal protection test evaluation system includes at least: a meteorological big data mining module, a user driving big data mining module, a thermal protection test information database module, a component material performance database module, a thermal protection test data processing module, and a component thermal protection risk assessment module. In this system, the outputs of the meteorological big data mining module and the user driving big data mining module are stored in the thermal protection test information database module. The thermal protection test data processing module can access component performance parameters from the component material performance database module to process test data. The component thermal protection risk assessment module receives the output of the thermal protection test data processing module and accesses data parameters from the thermal protection test information database module and the component material performance database module to perform thermal protection risk assessment.

[0085] Among them, the meteorological big data mining module conducts in-depth data mining on the daily and hourly meteorological big data of all cities in the past few years, statistically extracts the cumulative number of days with the daily maximum temperature at each temperature point in each city, selects the city with the most days with the daily maximum temperature reaching the thermal protection test temperature threshold as the target city, outputs the annual average proportion of high-temperature weather days with the daily maximum temperature reaching the test temperature threshold in the target city (that is, the annual average proportion of high-temperature days in the target city) and the average proportion of daily high-temperature periods that reach the test temperature threshold on high-temperature days with the daily maximum temperature reaching the test temperature threshold (that is, the average proportion of daily high-temperature periods in the target city), and then, based on the information of high-temperature weather months with the maximum temperature reaching the test temperature threshold in the target city, statistically extracts the average maximum temperature of the target city in different periods in these months, and outputs the daily high-temperature period range corresponding to the target city in combination with the average proportion of daily high-temperature periods.

[0086] The user driving big data mining module conducts in-depth data mining on massive user driving big data, statistically extracts key data such as the user's mileage in various speed ranges and slope ranges, and the user's mileage at different times of the day, and outputs the average mileage percentage of users that meets the speed and slope ranges of each thermal protection test condition based on the speed and slope information of each working condition of the thermal protection test. At the same time, based on the daily high temperature period range output by the meteorological big data mining module, it outputs the average proportion of users' car usage within the daily high temperature period range (i.e. the average proportion of car usage during the daily high temperature period).

[0087] Thermal protection test information database module, which structures the storage of the vehicle's total mileage over its entire life cycle, operating condition data of each thermal protection test condition, output data of the meteorological big data mining module, and output data of the user driving big data mining module, and can output corresponding thermal protection test information data according to data retrieval requirements.

[0088] Parts material performance database module, which structures the storage of parts name, material category, activation energy, long-term temperature target limit, long-term temperature time target limit, short-term temperature target limit and short-term temperature time target limit provided by automotive parts suppliers, and can output corresponding material performance parameters according to the evaluation object category.

[0089] Thermal protection test data processing module, which is used to process the original data of thermal protection test and screen out over-temperature conditions and over-temperature components whose test temperature exceeds their long-term and short-term temperature target limits.

[0090] A component thermal protection risk assessment module retrieves the parameter data required for calculation (such as at least the over-temperature value of the vehicle's over-temperature components under over-temperature conditions in the thermal protection test, the duration that the over-temperature components are at the over-temperature value under over-temperature conditions in the thermal protection test, the temperature target limit of the over-temperature components, meteorological data, and the time target limit of the over-temperature components). Equivalent calculations are performed on all over-temperature components one by one according to the long-term and short-term temperature target limits of the components and the test conditions, and the summation is summarized to obtain the over-temperature duration of each over-temperature component throughout its life cycle based on the long-term and short-term temperature target limits. Then, an accurate assessment of the thermal protection risk is performed based on the long-term and short-term temperature target limits of the components.

[0091] This embodiment establishes a vehicle thermal protection test evaluation system and method by integrating multi-source data such as meteorological big data, user driving big data, thermal protection test condition data, and component material performance data, thereby achieving an accurate assessment of the thermal protection risks of components throughout the vehicle's life cycle.

[0092] In one embodiment, if Figure 3 As shown, Figure 3 This is an operational flow chart of meteorological big data mining provided by the present invention. Figure 3 In the meteorological big data mining, the following steps are involved: S1-1: Obtain and organize meteorological big data: Obtain daily and hourly meteorological big data for all cities over the past three years from weather websites, and standardize and summarize them in the format of city name, year, month, day, daily maximum temperature, and maximum temperature for each time period (each hour as a time period); S1-2: Count the cumulative number of days at each temperature point in all cities: Use the Python programming language to develop a meteorological big data mining program. The program automatically identifies the city information contained in the organized and summarized meteorological big data, and then traverses and counts the cumulative number of days at each temperature point in the temperature range of 30°C to 50°C in all cities. S1-3: Output the annual average percentage of days exceeding the test temperature threshold in the target city: The meteorological big data mining program selects the cities with the most cumulative days reaching the test temperature threshold based on the preset thermal protection test temperature threshold as target cities, and calculates and outputs the annual average percentage of high-temperature days in the target city with the maximum daily temperature reaching the test temperature threshold (i.e., the annual average percentage of high-temperature days in the target city); S1-4: Output the daily average proportion of high-temperature periods exceeding the test temperature threshold in the target city: The meteorological big data mining program performs statistical analysis on the daily high-temperature periods on high-temperature days when the maximum daily temperature in the target city reaches the test temperature threshold, and statistically outputs the average proportion of the daily high-temperature periods that reach the test temperature threshold on high-temperature days in the target city (i.e., the average proportion of the daily high-temperature periods in the target city); S1-5: Statistical analysis of the average maximum temperature in different periods of the target city's hot months: The meteorological big data mining program analyzes the months in which high-temperature days occur in the target city, obtains the target city's hot months, filters out the target city's meteorological big data for the hot months, and statistically analyzes the average maximum temperature in different periods by period; S1-6: Output the range of the target city's daily high temperature period: The meteorological big data mining program combines the output average time proportion of the target city's daily high temperature period, and outputs the continuous time periods with the highest average maximum temperature ranking and the average time proportion of the daily high temperature period as the range of the target city's daily high temperature period (i.e., the range of the daily high temperature period corresponding to the daily high temperature period).

[0093] In one embodiment, if Figure 4 As shown, Figure 4 This is an operational flow chart of user driving big data mining provided by the present invention. Figure 4 In [1], user driving big data mining includes the following steps: S2-1: Obtain and organize user driving big data: Through the backend data desensitization of the car cloud platform (hiding sensitive user data such as vehicle VIN and GPS) or directly installing a dashcam in the car (based on user consent), obtain user driving big data during the high temperature period in July in summer: the data frequency is 1Hz, the vehicle sample size is not less than 10,000 vehicles, and the data is standardized and summarized according to the format of vehicle ID, time, speed, acceleration, slope, and mileage; S2-2: Divide the speed and slope intervals: Divide the speed interval 0-200 km / h into 20 km / h intervals, and divide the slope interval 0-20% into 2% intervals; S2-3: Outputting a mileage ratio matrix: Using the Python programming language, develop a user driving big data mining program. This program divides the user driving big data into the speed and slope intervals described in S22, performs statistical analysis on the user's driving mileage, and outputs a 10*10 matrix of the user's driving mileage ratio for each speed and slope interval. S2-4: Output the average usage ratio of vehicles during the daily high temperature period: The user driving big data mining program performs statistical analysis on the user driving big data for each vehicle on a daily and hourly basis according to the vehicle ID. If the vehicle's mileage in the daily high temperature period range described in S16 is greater than 1 km, it is determined that the user has driven the vehicle during the high temperature period on that day. Otherwise, it is determined that the user has not driven the vehicle, and the average usage ratio of the vehicle during the daily high temperature period (i.e., the average usage ratio of the vehicle during the daily high temperature period) is output.

[0094] In one embodiment, if Figure 5 As shown, Figure 5This is an operational flow chart for establishing a thermal protection test information database provided by the present invention. Figure 5 In the thermal protection test information database, the establishment of the database includes the following steps: S3-1: Summarize and save data mining results: Summarize and save the meteorological big data mining results output by the meteorological big data mining module and the user driving big data mining results output by the user driving big data mining module in the form of an Excel spreadsheet; S3-2: Establish a database and import thermal protection test information data: Create a new MySQL thermal protection test information database and import the Excel spreadsheet data described in S31, and then write the vehicle's total mileage over its entire life cycle and the operating condition information data of the thermal protection test (including the operating condition name, vehicle speed, slope and operating mileage of each operating condition). The thermal protection test information database can query any thermal protection test information data according to evaluation requirements, and display and output its detailed data.

[0095] In one embodiment, if Figure 6 As shown, Figure 6 This is an operational flow chart for establishing a component material performance database provided by the present invention. Figure 6 In , establishing a component material performance database includes the following steps: S4-1: Organize and save component material performance data: Organize the component material performance data provided by suppliers, including: component name, material category, activation energy, long-term temperature target limit, long-term temperature time target limit, short-term temperature target limit, and short-term temperature time target limit data, and summarize and save them in the form of an Excel spreadsheet; S4-2: Establish a database and import component material performance data: Create a new MySQL component material performance database and import the Excel spreadsheet data described in S41. The component material performance database can query any component material data according to evaluation requirements, display and output its detailed data.

[0096] In one embodiment, if Figure 7 As shown, Figure 7 This is an operational flow chart of thermal protection test data processing provided by the present invention. Figure 7 In the thermal protection test data processing, the following steps are included: S5-1: Export test raw data: Export the thermal protection test data collected by the data acquisition device at a frequency of 1 Hz into a thermal protection test raw data file in xlsx or csv format; S5-2: Retrieve the long-term and short-term temperature target limits of component materials: Based on the component test measurement point details and material categories in the thermal protection test data, retrieve the long-term and short-term temperature target limits of the corresponding component from the component material performance database; S5-3: Develop a test data processing module to output statistical results: Using the Python programming language, develop a thermal protection test data processing program. This program loads the exported thermal protection test raw data files, automatically identifies the thermal protection test conditions within the raw data, and statistically outputs the maximum temperatures of all component test points under each thermal protection test condition. During data loading, the program automatically identifies and handles potential errors such as missing data and vehicle speed drift.

[0097] S5-4: Screening over-temperature conditions and over-temperature component details: Compare the output results of the thermal protection test data processing program with the retrieved long-term temperature target limit and short-term temperature target limit to screen out over-temperature conditions and over-temperature component details in the thermal protection test.

[0098] In one embodiment, if Figure 8 As shown, Figure 8 This is an operational flow chart of a component thermal protection risk assessment provided by the present invention. Figure 8 In the thermal protection risk assessment of components, the following steps are included: S6-1: Retrieve meteorological and vehicle usage data: retrieve the target city's annual average percentage of high-temperature days (i.e., the target city's annual average percentage of high-temperature days), the average percentage of daily high-temperature periods (i.e., the target city's daily average percentage of high-temperature periods), and the average percentage of vehicles used during high-temperature periods (i.e., the average percentage of vehicles used during daily high-temperature periods) from the thermal protection test information database; S6-2: Retrieving user driving data and test condition data: Based on the over-temperature condition of the thermal protection test selected in S54, retrieve the user driving mileage percentage within the speed and slope range of the over-temperature condition (i.e., the user driving mileage percentage under the over-temperature condition) from the thermal protection test information database and sum them to obtain the user driving mileage percentage data for each over-temperature condition of the thermal protection test. Simultaneously, retrieve the vehicle's full life cycle design mileage data (i.e., the vehicle's full life cycle total mileage) and the operating mileage data for each test condition (i.e., the operating mileage for the over-temperature condition in the thermal protection test). S6-3: Retrieve component material performance data: Based on the details of the over-temperature components screened out in S54, retrieve the activation energy, long-term temperature target limit, long-term temperature time target limit, short-term temperature target limit, and short-term temperature time target limit of each over-temperature component from the component material performance database; S6-4: Retrieve component overtemperature points and overtemperature duration: From the thermal protection test raw data file, extract the overtemperature points (i.e., the overtemperature values ​​of the overtemperature components under the overtemperature conditions in the thermal protection test) and overtemperature duration (i.e., the duration that the overtemperature components remain at the overtemperature values ​​under the overtemperature conditions in the thermal protection test) of all overtemperature components under each overtemperature condition in the thermal protection test, according to the long-term and short-term temperature target limits of the components. S6-5: Equivalent calculation of the over-temperature duration of over-temperature components throughout their life cycle: Based on the established temperature-time cumulative effect model, combined with all retrieved parameter data, according to the long- and short-term temperature target limits of each component, the over-temperature points and over-temperature times of all over-temperature components in each over-temperature test condition are equivalently calculated and summed up, to obtain the equivalent over-temperature duration of all over-temperature components in the vehicle's entire life cycle according to the long- and short-term temperature target limits (i.e. the equivalent over-temperature duration of the over-temperature components' entire life cycle).

[0099] S6-6: Risk assessment of component thermal protection test: The equivalent over-temperature duration of all over-temperature components in the vehicle's entire life cycle, calculated equivalently as described in S65, is compared with the target time limits for the long and short-term temperatures of the components. If the equivalent over-temperature duration of the component is greater than its target time limit, it is judged to be risky, otherwise it is not risky.

[0100] It should be noted that all actions of acquiring signals, information or data (e.g., weather data, user driving data, etc.) in the present invention are carried out in compliance with the relevant local data protection laws and policies and with authorization from the data owner (e.g., user).

[0101] It should be noted that for the sake of simplicity, the method embodiments are described as a series of actions. However, those skilled in the art should be aware that the embodiments of the present invention are not limited by the order of the actions described, because according to the embodiments of the present invention, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in this specification are all preferred embodiments, and the actions involved are not necessarily required for the embodiments of the present invention.

[0102] Based on the same inventive concept, the second aspect of the embodiment of the present invention provides a vehicle thermal protection test and evaluation device. Figure 9 , Figure 9 FIG. 1 is a structural block diagram of a vehicle thermal protection test and evaluation device provided by an embodiment of the present invention. Figure 9 As shown, the vehicle thermal protection test and evaluation device includes: a first time determination module, configured to determine an equivalent exposure time of the over-temperature component based on at least an over-temperature value of the over-temperature component of the vehicle under an over-temperature condition in a thermal protection test, a duration during which the over-temperature component remains at the over-temperature value under the over-temperature condition in the thermal protection test, and a target temperature limit of the over-temperature component; A first proportion determination module is used to obtain a proportion of user mileage under the over-temperature condition based on user driving data; A first determining module is configured to obtain a life cycle equivalent user mileage under the over-temperature condition based on the total life cycle mileage of the vehicle and the user mileage ratio; a cycle number determination module, configured to obtain a life cycle equivalent user driving condition cycle number under the over-temperature condition based on the condition mileage of the over-temperature condition in the thermal protection test and the life cycle equivalent user driving mileage; a coefficient determination module, configured to obtain a full life cycle conversion coefficient corresponding to the over-temperature component based at least on the full life cycle equivalent user driving condition cycle number; A second time determination module is configured to obtain an equivalent over-temperature duration of the over-temperature component's full life cycle based on a full life cycle conversion coefficient corresponding to the over-temperature component and an equivalent exposure time of the over-temperature component; The test evaluation module is used to compare the equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

[0103] Optionally, the device further comprises: The second determination module is used to obtain, based on meteorological data, a high temperature day in which the maximum daily temperature of the target city reaches a test temperature threshold of a thermal protection test; The second proportion determination module is used to obtain the annual average proportion of high temperature days in the target city according to the high temperature days corresponding to the target city; The third proportion determination module is used to obtain the average proportion of the daily high temperature period of the target city according to the daily high temperature period on the high temperature day corresponding to the target city when the temperature reaches the test temperature threshold; Coefficient determination module, including: The first coefficient determination submodule is used to obtain the full life cycle conversion coefficient corresponding to the over-temperature component based on at least the number of equivalent user driving condition cycles in the full life cycle, the average annual proportion of high-temperature days in the target city, and the average proportion of daily high-temperature periods in the target city.

[0104] Optionally, the device further comprises: a third determining module, configured to obtain, based on the user driving data and a daily high temperature period range interval corresponding to the daily high temperature period, a user's mileage within the daily high temperature period range interval under the over-temperature condition; A fourth determining module is configured to obtain vehicle usage data of users in the daily high temperature period range based on the user's driving mileage in the daily high temperature period range under the over-temperature condition; a fourth proportion determination module, configured to obtain an average proportion of vehicle usage during the daily high temperature period based on the vehicle usage data of users in the daily high temperature period range and the user driving data; Coefficient determination module, including: The second coefficient determination submodule is used to obtain the full life cycle conversion coefficient corresponding to the over-temperature component based on at least the number of equivalent user driving condition cycles of the full life cycle and the average vehicle usage ratio during the daily high temperature period.

[0105] Optionally, the device further comprises: A fifth determining module is configured to obtain a user's driving mileage within the daily high temperature period range under the over-temperature condition based on the user driving data and the daily high temperature period range corresponding to the daily high temperature period; A sixth determining module is configured to obtain vehicle usage data of users in the daily high temperature period range based on the user's driving mileage in the daily high temperature period range under the over-temperature condition; a fifth proportion determination module, configured to obtain an average proportion of vehicles used during the high temperature period of the day based on the vehicle use data of users in the high temperature period of the day and the driving data of the users; The first coefficient determination submodule includes: The third coefficient determination submodule is used to obtain the full life cycle conversion coefficient corresponding to the over-temperature component based on the full life cycle equivalent user driving condition cycle number, the annual average proportion of high-temperature days in the target city, the average proportion of daily high-temperature time periods in the target city, and the average proportion of vehicle use in the daily high-temperature time periods.

[0106] Optionally, the device further comprises: a temperature determination module, configured to obtain, based on a raw data file of a thermal protection test, the maximum temperature of each test component of the vehicle under each thermal protection test condition in the thermal protection test; a component determination module, configured to compare the maximum temperature corresponding to each tested component with a target temperature limit of the tested component to obtain the over-temperature component; The operating condition determination module is used to determine the thermal protection test operating condition corresponding to the over-temperature component in the thermal protection test as the over-temperature operating condition.

[0107] Optionally, the device further comprises: A query module, configured to query a component material performance database to obtain the material activation energy of the overheated component; The first time to determine the module, including: The third time determination module is used to determine the equivalent exposure time of the over-temperature component based on the material activation energy of the over-temperature component, the over-temperature value of the over-temperature component under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component.

[0108] Optionally, the equivalent exposure time of the over-temperature component includes: a short-term equivalent exposure time of the over-temperature component determined based on a short-term temperature target limit of the over-temperature component, and / or a long-term equivalent exposure time of the over-temperature component determined based on a long-term temperature target limit of the over-temperature component; The equivalent over-temperature duration of the over-temperature component during its entire life cycle includes: a short-term equivalent over-temperature duration of the over-temperature component during its entire life cycle determined based on the short-term equivalent exposure time of the over-temperature component, and / or a long-term equivalent over-temperature duration of the over-temperature component during its entire life cycle determined based on the long-term equivalent exposure time of the over-temperature component; Test evaluation module, including: The thermal protection test evaluation module is used to compare the short-term equivalent over-temperature duration of the over-temperature component throughout its life cycle with the short-term time target limit of the over-temperature component, and / or to compare the long-term equivalent over-temperature duration of the over-temperature component throughout its life cycle with the long-term time target limit of the over-temperature component, so as to obtain the thermal protection test evaluation result of the over-temperature component.

[0109] Based on the same inventive concept, the third aspect of an embodiment of the present invention provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps in the vehicle thermal protection test evaluation method as described in any embodiment of the first aspect of the embodiment of the present invention are implemented.

[0110] Based on the same inventive concept, a fourth aspect of the embodiment of the present invention provides an electronic device, such as Figure 10 shown. Figure 10 This is a schematic diagram of an electronic device according to an embodiment of the present invention. The electronic device includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When executed by the processor, the computer program implements the steps of the vehicle thermal protection test evaluation method according to any embodiment of the first aspect of the present invention.

[0111] Based on the same inventive concept, the fifth aspect of the embodiment of the present invention provides a computer program product, including a computer program, which, when executed by a processor, implements the steps in the vehicle thermal protection test evaluation method described in any embodiment of the first aspect of the embodiment of the present invention.

[0112] As for the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0113] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0114] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, embodiments of the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Furthermore, embodiments of the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0115] The embodiments of the present invention are described with reference to the flowcharts and / or block diagrams of the methods, terminal devices (systems), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of the processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing terminal device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing terminal device generate instructions for implementing the process in the flowchart and / or block diagram. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0116] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing terminal device to operate in a specific manner, so that the instructions stored in the computer readable memory produce a manufactured product including an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0117] These computer program instructions can also be loaded onto a computer or other programmable data processing terminal device so that a series of operating steps are executed on the computer or other programmable terminal device to produce a computer-implemented process, thereby providing instructions for executing on the computer or other programmable terminal device to implement the process. Figure 1 a process or multiple processes and / or boxes Figure 1 A step that specifies a function in one or more boxes.

[0118] Although the preferred embodiments of the present invention have been described, those skilled in the art may make additional changes and modifications to these embodiments once they become aware of the basic creative concepts. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the embodiments of the present invention.

[0119] Finally, it should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or terminal device that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or terminal device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or terminal device that includes the element.

[0120] The above is a detailed introduction to the vehicle thermal protection test evaluation method, device, equipment and medium provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scopes. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A vehicle thermal protection test evaluation method, characterized in that: The method comprises: determining an equivalent exposure time of the over-temperature component based on at least an over-temperature value of the over-temperature component of the vehicle under an over-temperature condition in a thermal protection test, a duration during which the over-temperature component remains at the over-temperature value under the over-temperature condition in the thermal protection test, and a target temperature limit of the over-temperature component; Based on the user driving data, the user's mileage ratio under the over-temperature condition is obtained; Based on the total life cycle mileage of the vehicle and the user mileage ratio, obtaining the life cycle equivalent user mileage under the over-temperature condition; Obtaining a life cycle equivalent user driving cycle number under the over-temperature condition based on the operating mileage of the over-temperature condition in the thermal protection test and the life cycle equivalent user driving mileage; Obtaining a life cycle conversion coefficient corresponding to the over-temperature component based at least on the life cycle equivalent user driving condition cycle number; Obtaining an equivalent over-temperature duration of the over-temperature component's full life cycle based on the full life cycle conversion coefficient corresponding to the over-temperature component and the equivalent exposure time of the over-temperature component; The equivalent over-temperature duration of the over-temperature component throughout its life cycle is compared with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

2. The vehicle thermal protection test evaluation method according to claim 1, characterized in that: The method further comprises: Based on meteorological data, obtain the high temperature days when the maximum daily temperature in the target city reaches the test temperature threshold of the thermal protection test; According to the high temperature days corresponding to the target city, obtain the annual average proportion of high temperature days in the target city; According to the high-temperature periods of the target city on high-temperature days when the temperature reaches the test temperature threshold, the average proportion of the high-temperature periods of the target city is obtained; Based at least on the full life cycle equivalent user driving condition cycle number, a full life cycle conversion coefficient corresponding to the over-temperature component is obtained, including: The full life cycle conversion coefficient corresponding to the over-temperature component is obtained based at least on the number of equivalent user driving condition cycles throughout the full life cycle, the average annual proportion of high-temperature days in the target city, and the average proportion of daily high-temperature periods in the target city.

3. The vehicle thermal protection test evaluation method according to claim 1, characterized in that: The method further comprises: Based on the user driving data and the daily high temperature period range interval corresponding to the daily high temperature period, obtaining the user's mileage within the daily high temperature period range interval under the over-temperature condition; Based on the user's driving mileage in the daily high temperature period range under the over-temperature condition, obtaining the user's vehicle usage data in the daily high temperature period range; Based on the user car usage data and the user driving data within the daily high temperature period range, an average car usage ratio during the daily high temperature period is obtained; Based at least on the full life cycle equivalent user driving condition cycle number, a full life cycle conversion coefficient corresponding to the over-temperature component is obtained, including: Based at least on the full life cycle equivalent user driving condition cycle number and the average vehicle usage ratio during the daily high temperature period, the full life cycle conversion coefficient corresponding to the over-temperature component is obtained.

4. The vehicle thermal protection test evaluation method according to claim 2, characterized in that: The method further comprises: Based on the user driving data and the daily high temperature period range interval corresponding to the daily high temperature period, obtaining the user's driving mileage within the daily high temperature period range interval under the over-temperature condition; Based on the user's driving mileage in the daily high temperature period range under the over-temperature condition, obtaining the user's vehicle usage data in the daily high temperature period range; Based on the user car usage data and the user driving data within the daily high temperature period range, an average car usage ratio during the daily high temperature period is obtained; Based at least on the full life cycle equivalent user driving cycle number, the annual average proportion of high temperature days in the target city, and the average proportion of daily high temperature periods in the target city, a full life cycle conversion coefficient corresponding to the over-temperature component is obtained, including: Based on the number of equivalent user driving condition cycles throughout the entire life cycle, the average annual proportion of high-temperature days in the target city, the average proportion of daily high-temperature periods in the target city, and the average proportion of vehicle usage during the daily high-temperature periods, the corresponding life cycle conversion coefficient of the over-temperature component is obtained.

5. The vehicle thermal protection test evaluation method according to claim 1, characterized in that: The method further comprises: Obtaining, according to the thermal protection test original data file, the maximum temperature of each test component of the vehicle under each thermal protection test condition in the thermal protection test; Comparing the maximum temperature corresponding to each test component with the temperature target limit of the test component to obtain the over-temperature component; The thermal protection test condition corresponding to the over-temperature component in the thermal protection test is determined as the over-temperature condition.

6. The vehicle thermal protection test evaluation method according to claim 1, characterized in that: The method further comprises: Querying a component material performance database to obtain the material activation energy of the overheated component; Determining the equivalent exposure time of the over-temperature component based on at least the over-temperature value of the over-temperature component of the vehicle under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component, including: The equivalent exposure time of the over-temperature component is determined based on the material activation energy of the over-temperature component, the over-temperature value of the over-temperature component under the over-temperature condition in the thermal protection test, the duration that the over-temperature component is at the over-temperature value under the over-temperature condition in the thermal protection test, and the temperature target limit of the over-temperature component.

7. The vehicle thermal protection test evaluation method according to any one of claims 1 to 6, characterized in that: The equivalent exposure time of the over-temperature component includes: a short-term equivalent exposure time of the over-temperature component determined based on a short-term temperature target limit of the over-temperature component, and / or a long-term equivalent exposure time of the over-temperature component determined based on a long-term temperature target limit of the over-temperature component; The equivalent over-temperature duration of the over-temperature component during its entire life cycle includes: a short-term equivalent over-temperature duration of the over-temperature component during its entire life cycle determined based on the short-term equivalent exposure time of the over-temperature component, and / or a long-term equivalent over-temperature duration of the over-temperature component during its entire life cycle determined based on the long-term equivalent exposure time of the over-temperature component; Compare the equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the target time limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component, including: Compare the short-term equivalent over-temperature duration of the over-temperature component throughout its life cycle with the short-term time target limit of the over-temperature component, and / or compare the long-term equivalent over-temperature duration of the over-temperature component throughout its life cycle with the long-term time target limit of the over-temperature component to obtain the thermal protection test evaluation result of the over-temperature component.

8. A vehicle thermal protection test and evaluation device, characterized in that: The device comprises: a first time determination module, configured to determine an equivalent exposure time of the over-temperature component based on at least an over-temperature value of the over-temperature component of the vehicle under an over-temperature condition in a thermal protection test, a duration during which the over-temperature component remains at the over-temperature value under the over-temperature condition in the thermal protection test, and a target temperature limit of the over-temperature component; A first proportion determination module is used to obtain a proportion of user mileage under the over-temperature condition based on user driving data; A first determining module is configured to obtain a life cycle equivalent user mileage under the over-temperature condition based on the total life cycle mileage of the vehicle and the user mileage ratio; a cycle number determination module, configured to obtain a life cycle equivalent user driving condition cycle number under the over-temperature condition based on the condition mileage of the over-temperature condition in the thermal protection test and the life cycle equivalent user driving mileage; a coefficient determination module, configured to obtain a full life cycle conversion coefficient corresponding to the over-temperature component based at least on the full life cycle equivalent user driving condition cycle number; A second time determination module is configured to obtain an equivalent over-temperature duration of the over-temperature component's full life cycle based on a full life cycle conversion coefficient corresponding to the over-temperature component and an equivalent exposure time of the over-temperature component; The test evaluation module is used to compare the equivalent over-temperature duration of the over-temperature component throughout its entire life cycle with the time target limit of the over-temperature component to obtain a thermal protection test evaluation result of the over-temperature component.

9. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the computer program is executed by the processor, the vehicle thermal protection test evaluation method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the vehicle thermal protection test evaluation method according to any one of claims 1 to 7 is implemented.

11. A computer program product, characterized in that The invention comprises a computer program, which, when executed by a processor, implements the vehicle thermal protection test evaluation method according to any one of claims 1 to 7.

Images