Test method for simulating use of vehicle machine function of vehicle under high-voltage condition

Abstract

The invention relates to the technical field of in-vehicle entertainment product testing, in particular to a testing method for simulating in-vehicle entertainment product functions of an automobile under the condition of high voltage, which comprises the following steps of: firstly, before testing, configuring a simulation load to simulate the load condition of the in-vehicle entertainment product in actual use, and then dynamically changing the load and simulating the load change through a control module; compared with the prior art that only static simulation can be carried out in a test method, the performance of the vehicle-mounted terminal under load change is monitored in real time, data are collected, finally, the collected data are analyzed, and performance evaluation of the vehicle-mounted terminal is completed. According to the technical scheme, the performance, the stability and the reliability of the in-vehicle infotainment in actual use during load change are evaluated by simulating the possible load change condition of the vehicle in actual use, and a reliable and efficient evaluation tool is provided for manufacturers.

Description

Technical Field

[0001] The present invention relates to the technical field of vehicle computer testing, and in particular to a testing method for simulating the use of vehicle computer functions by a vehicle under high voltage. Background Art

[0002] With the rapid development of automobile technology, vehicle electronic systems have become an important part of modern automobiles. However, the complexity of these electronic systems and their high requirements for performance and stability also bring challenges. In actual use, vehicle electronic systems often face various load changes, such as a sudden increase in load during startup or acceleration, and a rapid decrease in load during deceleration or shutdown. Such load changes may have a significant impact on the performance of vehicle electronic systems, and even cause functional failure or performance degradation, thus affecting driving safety and passenger experience. Therefore, it is necessary to simulate the impact of vehicle load changes on vehicle computer functions.

[0003] However, existing testing technologies have limitations in simulating vehicle load changes. They can only simulate static loads and cannot truly reflect the dynamic load changes that the vehicle may face in actual use. Summary of the invention

[0004] The purpose of the present invention is to provide a testing method for simulating the use of vehicle computer functions under high voltage conditions, so as to solve the problem that the existing testing technology has limitations in simulating vehicle load changes, can only simulate static loads, and cannot truly reflect the dynamic load changes that the vehicle may face in actual use.

[0005] To achieve the above object, the present invention provides a test method for simulating the use of a vehicle computer function under high voltage, comprising the following steps:

[0006] S1: Before the test begins, configure a simulated load to simulate the load conditions that the vehicle computer faces in actual use;

[0007] S2: Dynamically change the load through the control module to simulate load changes;

[0008] S3: Real-time monitoring of the performance of the vehicle computer under load changes and collection of data;

[0009] S4: Analyze the collected data and complete the performance evaluation of the vehicle computer.

[0010] Among them, in step S1, the specific content of configuring the simulated load is: according to the composition of the vehicle computer, determine the type of load to be simulated, based on the performance data of the vehicle computer in different usage scenarios, determine the size of each load, and design the load change pattern according to the actual usage of the vehicle.

[0011] In step S1, the load size is calculated by the following formula:

[0012] L=k×p

[0013] Among them, L is the load size, k is the proportionality coefficient, and p is the performance data.

[0014] Among them, in step S2, the load is dynamically changed through the control module, and the specific content of the simulated load change is: the control module completes the switching between different gears of normal load dumping, first load dumping and second load dumping, so as to realize the sudden change of load under high voltage environment.

[0015] Among them, in step S2, the normal gear of load dumping refers to the situation where the load changes normally as expected under standard operating conditions. In this gear, the load change is smooth and predictable, which simulates the load fluctuation during normal operation of the vehicle. The first gear of load dumping refers to the situation where the load suddenly changes significantly under more severe conditions. In this gear, the load changes more dramatically, which simulates the sudden change of the load of the vehicle under certain special operating conditions. The second gear of load dumping represents the situation where the load changes extremely under extreme conditions. In this gear, the load change reaches or exceeds the limit value of the vehicle's electronic system, which simulates the extreme change of the load when the vehicle encounters extreme faults or abnormal operating conditions.

[0016] Wherein, in step S2, the formula for calculating the load change is:

[0017] L(t)=L0+Asin(wt+φ)

[0018] Where L(t) is the load value at time t, L0 is the base load value, A is the amplitude, w is the angular frequency, and φ is the phase.

[0019] Among them, in step S3, before collecting data, it is necessary to determine monitoring parameters, select monitoring equipment and arrange monitoring points. The monitoring parameters include power supply stability, power supply stability and communication delay. The monitoring equipment includes voltage sensor, current sensor and communication test equipment. The monitoring points include the power input terminal, load output terminal and communication interface of the vehicle computer. After collecting the data, the data is stored in a reliable storage device for subsequent analysis and processing.

[0020] Among them, in step S4, the specific steps of analyzing the collected data include:

[0021] Clean the collected data to remove outliers and noise;

[0022] Format the data to meet the requirements of the analysis software;

[0023] Calculate the fluctuation range of the power supply voltage, voltage drop and recovery time, and evaluate the stability of the vehicle power system;

[0024] Analyze the amplitude, frequency and transient response of current fluctuations to evaluate the impact of loads on the vehicle's power system;

[0025] Calculate the communication delay time and packet loss rate to evaluate the communication performance between the electronic systems of the vehicle computer.

[0026] Among them, the test method simulating the use of the vehicle computer function under high voltage conditions also includes fault diagnosis and early warning of the vehicle computer function. The specific content is: after analyzing the collected data and completing the performance evaluation of the vehicle computer, the performance of the vehicle computer function under different loads is integrated as historical data. In combination with historical data and industry standards, the threshold of the performance parameter is set. When the monitored data exceeds the threshold, the fault diagnosis program is triggered, the cause of the fault is analyzed, and an early warning signal is issued to prompt maintenance personnel to take timely measures based on the cause of the fault.

[0027] The present invention provides a test method for simulating the use of a vehicle computer function under high voltage conditions. First, before the test begins, a simulated load is configured to simulate the load conditions faced by the vehicle computer in actual use. Then, the load is dynamically changed through a control module to simulate the load changes, and the performance of the vehicle computer under load changes is monitored in real time, and data is collected. Finally, the collected data is analyzed to complete the performance evaluation of the vehicle computer. Compared with the test method in the prior art that can only perform static simulation, the technical solution simulates the load changes that the vehicle may face in actual use, thereby evaluating the performance, stability and reliability of the vehicle computer when the load changes in actual use, and provides manufacturers with a reliable and efficient evaluation tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 creative work.

[0029] Figure 1 It is a flowchart of the steps of simulating the use of the vehicle computer function under high voltage provided by the present invention.

[0030] Figure 2 It is a flowchart of the steps of analyzing the performance of vehicle computer functions under different loads based on the collected data provided by the present invention. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0032] See also Figure 1 and Figure 2 The present invention provides a test method for simulating the use of a vehicle computer function under high voltage conditions, the test method for simulating the use of a vehicle computer function under high voltage conditions comprising the following steps:

[0033] S1: Before the test begins, configure a simulated load to simulate the load conditions that the vehicle computer faces in actual use;

[0034] S2: Dynamically change the load through the control module to simulate load changes;

[0035] S3: Real-time monitoring of the performance of the vehicle computer under load changes and collection of data;

[0036] S4: Analyze the collected data and complete the performance evaluation of the vehicle computer.

[0037] In this embodiment, first, before the test begins, a simulated load is configured to simulate the load conditions that the vehicle computer faces in actual use, and then the load is dynamically changed through the control module to simulate the load change, and the performance of the vehicle computer under the load change is monitored in real time, and the data is collected. Finally, the collected data is analyzed to complete the performance evaluation of the vehicle computer. Compared with the test method in the prior art that can only perform static simulation, this technical solution simulates the load changes that the vehicle may face in actual use, thereby evaluating the performance, stability and reliability of the vehicle computer when the load changes in actual use, providing manufacturers with a reliable and efficient evaluation tool.

[0038] Furthermore, in step S1, the specific contents of configuring the simulated load are: determining the type of load to be simulated according to the composition of the vehicle computer, determining the size of each load based on the performance data of the vehicle computer in different usage scenarios, and designing the load change pattern according to the actual usage of the vehicle.

[0039] In this embodiment, the load types to be simulated include CPU load, memory load, I / O load, etc., and the load change mode includes load increase, decrease, fluctuation, etc. The load size is calculated by the following formula:

[0040] L=k×p

[0041] Among them, L is the load size, k is the proportionality coefficient, and p is the performance data.

[0042] Furthermore, in step S2, the load is dynamically changed through the control module, and the specific content of the simulated load change is: the control module completes the switching between normal load dumping, first load dumping and second load dumping gears to achieve sudden changes in the load under high-voltage environment.

[0043] Among them, the positioning of the normal gear position of load dumping is: the normal gear position of load dumping usually represents the situation where the load changes normally as expected under standard working conditions;

[0044] The characteristics of the normal gear position for load dumping are: in this gear position, the load changes are smooth and predictable, simulating the load fluctuations during normal vehicle operation;

[0045] The application of the load dump normal gear is: mainly used to verify the stability and reliability of the vehicle electronic system under normal working conditions.

[0046] The first gear of load dump is positioned as follows: the first gear of load dump represents the situation where the load suddenly changes greatly under more severe conditions;

[0047] The characteristics of the first gear of load dumping are: in this gear, the load change may be more drastic, simulating the sudden change of load under certain special working conditions (such as rapid acceleration, rapid deceleration, etc.);

[0048] The application of the first gear of load dump is: mainly used to test the response capability and protection mechanism of the vehicle electronic system under extreme working conditions, to ensure stable operation when the load changes suddenly.

[0049] Among them, the positioning of the second gear of load dumping is: the second gear of load dumping represents the situation where the load changes extremely under more extreme conditions;

[0050] The characteristics of the load dumping level 2 gear are: in this gear, the load change may reach or exceed the limit value of the vehicle electronic system, simulating the extreme load change when the vehicle encounters extreme faults or abnormal working conditions;

[0051] The application of the second gear of load dump is: mainly used to test the impact resistance and fault tolerance of the vehicle's electronic system under extreme conditions, to ensure that the vehicle can still maintain a certain safety and stability under extreme conditions.

[0052] Furthermore, in step S2, the formula for calculating the load change is:

[0053] L(t)=L0+Asin(wt+φ)

[0054] Where L(t) is the load value at time t, L0 is the base load value, A is the amplitude, w is the angular frequency, and φ is the phase.

[0055] Furthermore, in step S3, before collecting data, it is necessary to determine monitoring parameters, select monitoring equipment and arrange monitoring points. The monitoring parameters include power stability, power stability and communication delay. The monitoring equipment includes voltage sensors, current sensors and communication test equipment. The monitoring points include the power input terminal, load output terminal and communication interface of the vehicle computer. After collecting the data, the data is stored in a reliable storage device for subsequent analysis and processing.

[0056] In this embodiment, power supply stability includes the fluctuation range of the supply voltage, voltage drop and recovery time, etc. Current fluctuation refers to monitoring the transient response, fluctuation amplitude and frequency of the current when the load changes. Communication delay refers to evaluating the delay time and packet loss rate of data transmission between electronic systems. Voltage sensors and current sensors are used to collect voltage and current data at the power supply and load ends in real time. Communication test equipment is used to monitor communication delay and packet loss between electronic systems. Monitoring points are arranged at the power input end, load output end and communication interface of the vehicle computer to ensure that the monitoring points can fully cover the key performance parameters of the vehicle computer.

[0057] Furthermore, in step S4, the specific steps of analyzing the collected data include:

[0058] S101: Clean the collected data to remove outliers and noise;

[0059] S102: Format the data to meet the requirements of the analysis software;

[0060] S103: Calculate the fluctuation range, voltage drop and recovery time of the power supply voltage, and evaluate the stability of the power supply system of the vehicle computer;

[0061] S104: Analyze the amplitude, frequency and transient response of current fluctuations to evaluate the impact of the load on the power system of the vehicle computer;

[0062] S105: Calculate the communication delay time and packet loss rate to evaluate the communication performance between the electronic systems of the vehicle computer.

[0063] Furthermore, the test method for simulating the use of vehicle computer functions under high voltage conditions also includes fault diagnosis and early warning of vehicle computer functions. The specific content is: after analyzing the collected data and completing the performance evaluation of the vehicle computer, the performance of the vehicle computer functions under different loads is integrated as historical data, and the threshold of performance parameters is set in combination with historical data and industry standards. When the monitored data exceeds the threshold, the fault diagnosis program is triggered, the cause of the fault is analyzed, and an early warning signal is issued to prompt maintenance personnel to take timely measures based on the cause of the fault.

[0064] In this embodiment, after analyzing the collected data and completing the performance evaluation of the vehicle computer, the step of fault diagnosis and early warning of the vehicle computer function is used to achieve timely early warning and fault analysis of the vehicle computer when a fault occurs, thereby improving the maintenance efficiency of the vehicle computer.

[0065] What is disclosed above is only a preferred embodiment of the present invention, and it certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope of the invention.

Claims

1. A test method for simulating the use of a vehicle computer function under high voltage, characterized in that: The steps include: S1: Before the test begins, configure a simulated load to simulate the load conditions that the vehicle computer faces in actual use; S2: Dynamically change the load through the control module to simulate load changes; S3: Real-time monitoring of the performance of the vehicle computer under load changes and collection of data; S4: Analyze the collected data and complete the performance evaluation of the vehicle computer.

2. The test method for simulating the use of a vehicle computer function under high voltage as claimed in claim 1, characterized in that: In step S1, the specific contents of configuring the simulated load are: determining the type of load to be simulated according to the composition of the vehicle computer, determining the size of each load based on the performance data of the vehicle computer in different usage scenarios, and designing the load change pattern according to the actual usage of the vehicle.

3. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 2, characterized in that: In step S1, the load size is calculated by the following formula: L=k×p Among them, L is the load size, k is the proportionality coefficient, and p is the performance data.

4. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 3, characterized in that: In step S2, the load is dynamically changed through the control module, and the specific content of the simulated load change is: the control module completes the switching between normal load dumping, first load dumping and second load dumping gears to achieve sudden changes in the load under high-voltage environment.

5. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 4, characterized in that: In step S2, the normal load dumping gear refers to the situation where the load changes normally as expected under standard operating conditions. In this gear, the load changes are smooth and predictable, simulating the load fluctuation during normal operation of the vehicle. The first load dumping gear refers to the situation where the load suddenly changes significantly under more severe conditions. In this gear, the load changes more dramatically, simulating the sudden change of the load of the vehicle under certain special operating conditions. The second load dumping gear represents the situation where the load changes extremely under extreme conditions. In this gear, the load change reaches or exceeds the limit value of the vehicle's electronic system, simulating the extreme change of the load when the vehicle encounters extreme faults or abnormal operating conditions.

6. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 5, characterized in that: In step S2, the formula for calculating the load change is: L(t)=L0+Asin(wt+φ) Where L(t) is the load value at time t, L0 is the base load value, A is the amplitude, w is the angular frequency, and φ is the phase.

7. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 6, characterized in that: In step S3, before collecting data, it is necessary to determine monitoring parameters, select monitoring equipment and arrange monitoring points. The monitoring parameters include power stability, power stability and communication delay. The monitoring equipment includes voltage sensor, current sensor and communication test equipment. The monitoring points include the power input terminal, load output terminal and communication interface of the vehicle computer. After collecting the data, the data is stored in a reliable storage device for subsequent analysis and processing.

8. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 7, characterized in that: In step S4, the specific steps of analyzing the collected data include: Clean the collected data to remove outliers and noise; Format the data to meet the requirements of the analysis software; Calculate the fluctuation range of the power supply voltage, voltage drop and recovery time, and evaluate the stability of the vehicle power system; Analyze the amplitude, frequency and transient response of current fluctuations to evaluate the impact of loads on the vehicle's power system; Calculate the communication delay time and packet loss rate to evaluate the communication performance between the electronic systems of the vehicle computer.

9. The test method for simulating the use of vehicle computer functions under high voltage as claimed in claim 8, characterized in that: It also includes fault diagnosis and early warning of vehicle computer functions. The specific content is: after analyzing the collected data and completing the performance evaluation of the vehicle computer, the performance of the vehicle computer functions under different loads is integrated as historical data. Combining historical data and industry standards, the threshold of performance parameters is set. When the monitored data exceeds the threshold, the fault diagnosis program is triggered, the cause of the fault is analyzed, and an early warning signal is issued to prompt maintenance personnel to take timely measures based on the cause of the fault.

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