Whole vehicle electrostatic discharge soft breakdown test method
By using thermal imaging technology and AI analysis systems to identify temperature differences at the locations of electrostatic discharge in the vehicle, the problem of difficulty in efficiently identifying soft breakdown faults in existing technologies has been solved, enabling rapid and accurate fault diagnosis and improving the safety and comfort of the vehicle's electronic and electrical systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- FAW CAR CO LTD
- Filing Date
- 2026-05-13
- Publication Date
- 2026-07-21
AI Technical Summary
Existing technologies are insufficient for efficiently and quickly identifying soft breakdown faults in the vehicle's electronic and electrical systems, resulting in low troubleshooting efficiency, high costs, and significant potential safety hazards.
Thermal imaging technology is used to collect temperature difference data at the location of electrostatic discharge in a vehicle. Combined with an AI analysis system, a temperature difference threshold is set to determine whether soft breakdown has occurred. The thermal imager scans the location of electrostatic discharge in the entire vehicle to pinpoint the components that have experienced soft breakdown.
It enables rapid and accurate identification of soft breakdown faults in the vehicle's electronic and electrical components, improving troubleshooting efficiency, reducing development costs, and ensuring vehicle safety and comfort.
Smart Images
Figure CN122430632A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of vehicle testing technology, and more particularly to a method for testing the electrostatic discharge soft breakdown of a whole vehicle. Background Technology
[0002] Electrostatic discharge (ESD) is a key test in vehicle electromagnetic compatibility (EMC) testing, simulating the interference of human static electricity on vehicle electronic and electrical components. Static electricity causing component breakdown is the primary mode of ESD hazard in electronic equipment and is the most common and serious hazard in electronic equipment manufacturing.
[0003] Electrostatic discharge (ESD) can cause either hard or soft breakdown in components. Hard breakdown results in permanent failure of the component in a single event, causing functional abnormalities during vehicle ESD testing and is easily detected through routine inspections. Soft breakdown, on the other hand, degrades the performance of components and reduces their specifications, creating potential faults. Because soft breakdown can cause intermittent circuit malfunctions (due to reduced specifications) and is difficult to detect, it significantly complicates overall system operation and troubleshooting. Multiple soft breakdowns can lead to hard breakdown, rendering the vehicle malfunctioning and affecting vehicle safety and comfort. For soft breakdown faults, the industry typically uses multimeters, oscilloscopes, and signal generators to directly test electrical parameters, which suffers from low efficiency, long testing cycles, and high costs. While thermal imaging technology is used for circuit fault detection, it relies on manual experience to judge temperature changes, resulting in low efficiency. Furthermore, for complex electronic and electrical systems like those in vehicles, there is a lack of efficient and low-cost methods for troubleshooting soft breakdown faults. These problems urgently need to be addressed. Summary of the Invention
[0004] The purpose of this invention is to provide a method for testing the electrostatic discharge soft breakdown of a vehicle, so as to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for testing the electrostatic discharge soft breakdown of a vehicle, comprising:
[0006] Acquire the first thermal imaging data of the target electrostatic discharge location of the stable operating vehicle;
[0007] Perform a full-vehicle electrostatic discharge soft breakdown test on the target electrostatic discharge location;
[0008] Collect second thermal imaging data of the target electrostatic discharge location after the test;
[0009] Set a temperature difference threshold between the first and second thermal imaging data;
[0010] If the temperature difference between the first and second thermal imaging data exceeds the temperature difference threshold, it is determined that a soft breakdown has occurred at the target electrostatic discharge location.
[0011] Furthermore, before acquiring the first thermal imaging data of the target electrostatic discharge location of a stably operating vehicle, the following steps are included:
[0012] The electrostatic discharge test setup for the exterior and / or interior of the vehicle shall be carried out in accordance with the standard GB / T 19951.
[0013] Furthermore, the first thermal imaging data of the target electrostatic discharge location of the stably operating vehicle also includes:
[0014] Vehicle test conditions are set according to test standards;
[0015] Turn on the vehicle-mounted electrical components and run them in a steady state for the preset test preparation time.
[0016] Furthermore, the first thermal imaging data of the target electrostatic discharge location of the stably operating vehicle also includes:
[0017] The target electrostatic discharge location is scanned and photographed for the first time using a thermal imager, and the first thermal imaging data is obtained.
[0018] Furthermore, a whole-vehicle electrostatic discharge soft breakdown test is performed on the target electrostatic discharge location, including:
[0019] The target electrostatic discharge location was tested according to standard GB / T 19951;
[0020] Furthermore, a second thermal imaging dataset was acquired at the target electrostatic discharge location after the test, including:
[0021] A second scan of the target electrostatic discharge location is performed using a thermal imager, and second thermal imaging data is obtained.
[0022] Furthermore, a temperature difference threshold is set between the first and second thermal imaging data, including:
[0023] Establish a thermal imaging database of target electrostatic discharge locations;
[0024] An iterative strategy is set based on the temperature difference threshold obtained from the electrostatic discharge soft breakdown test at the target electrostatic discharge location. The temperature difference threshold is then adjusted according to the iterative strategy to make it approach the actual temperature difference threshold of the electrostatic discharge soft breakdown test at the target electrostatic discharge location.
[0025] Furthermore, including:
[0026] Obtain the component temperature difference threshold for electrostatic discharge soft breakdown test of each component at the target electrostatic discharge location;
[0027] Arrange and combine the temperature difference thresholds of each component, and calculate the combined temperature difference threshold for each combination;
[0028] Components that have been softly broken down can be identified by comparing temperature difference thresholds and combined temperature difference thresholds.
[0029] Furthermore, including:
[0030] Obtain the position information of each component at the target electrostatic discharge location;
[0031] By comparing the first and second thermal imaging data, information on the location of localized temperature rise anomalies can be obtained.
[0032] Compare the location information of localized temperature rise anomalies with the location information of each component, and set the breakdown weight of each component;
[0033] The components that have been softly broken down are determined by combining the combined temperature difference threshold and the breakdown weight.
[0034] Furthermore, a temperature difference threshold is set between the first and second thermal imaging data, including:
[0035] Based on the first and second thermal imaging data, an AI analysis system was built. The AI software was used to compare and analyze the temperature difference between the thermal images before and after the experiment, and to determine whether soft breakdown had occurred at the target electrostatic discharge location based on the temperature difference threshold.
[0036] Compared with existing technologies, the beneficial effects of this invention are as follows: To efficiently and quickly troubleshoot soft breakdown faults, a whole-vehicle electrostatic discharge soft breakdown fault troubleshooting test method is invented. This method is based on the principle that soft breakdown causes a sudden change in local heat in electrical and electronic components. By scanning and photographing the location or area of electrostatic discharge in the whole vehicle with a thermal imager, AI technology can be used to identify the temperature difference before and after electrostatic discharge, locate the location or device where soft breakdown occurs, identify potential soft breakdown faults in the whole vehicle's electronic and electrical components in advance, and then quickly rectify the problem, improve development and troubleshooting efficiency, and reduce development costs. Attached Figure Description
[0037] Figure 1 This is a flowchart of the whole vehicle electrostatic discharge soft breakdown test method in an embodiment of the present invention. Detailed Implementation
[0038] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
[0039] In the description of this invention, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0040] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0041] Please refer to the accompanying drawings in the specification. This invention provides a technical solution: a method for testing the electrostatic discharge soft breakdown of a whole vehicle, comprising the following steps:
[0042] S102. Collect the first thermal imaging data of the target electrostatic discharge location of the stable operating vehicle;
[0043] Before collecting the first thermal imaging data of the target electrostatic discharge location of the stable operating vehicle, the electrostatic discharge test setup for the entire vehicle's exterior and / or interior is carried out in accordance with standard GB / T 19951.
[0044] In the above embodiments, electrostatic discharge (ESD) causing component breakdown is the primary mode of ESD hazard in electronic equipment, and is the most common and serious hazard in electronic equipment manufacturing. ESD can cause hard breakdown or soft breakdown of components. Hard breakdown causes permanent failure of the component in a single event, and can cause functional abnormalities in the vehicle during ESD testing. Therefore, it is necessary to conduct ESD immunity testing for vehicle electronic modules according to standard GB / T 19951. ESD is divided into two types: direct discharge from occupants to the equipment during vehicle operation, and discharge from the human body to module pins during vehicle maintenance. The standard should specify the test levels for contact discharge and air discharge.
[0045] Furthermore, vehicle test conditions are set according to test standards;
[0046] This includes turning on the vehicle's electrical components and allowing them to run in a steady state for a preset test preparation time.
[0047] In the above embodiments, vehicle test conditions are set up, test arrangements and vehicle preparation are carried out to ensure that the vehicle meets the test requirements before the test. Preferably, all electrical components that can work for a long time are turned on and run in a steady state for at least 30 minutes.
[0048] Furthermore, the target electrostatic discharge location is scanned for the first time using a thermal imager, and the first thermal imaging data is obtained.
[0049] In the above embodiments, before the electrostatic discharge test, a thermal imager is used to scan the electrostatic discharge location of the entire vehicle and save the thermal imaging data to obtain thermal imaging data information of the working electrical components during steady-state operation of the vehicle, so as to compare with the thermal imaging data information collected after the test.
[0050] S104. Perform a full-vehicle electrostatic discharge soft breakdown test on the target electrostatic discharge location;
[0051] The process includes performing a full-vehicle electrostatic discharge soft breakdown test on the target electrostatic discharge location, including:
[0052] The target electrostatic discharge location was tested according to standard GB / T 19951;
[0053] In the above embodiments, the vehicle electrostatic discharge soft breakdown test is performed according to standard GB / T 19951 to test the electrostatic discharge location of the vehicle.
[0054] S106. Collect the second thermal imaging data of the target electrostatic discharge location after the test;
[0055] In this process, a second image scan is performed on the target electrostatic discharge location using a thermal imager to obtain a second set of thermal imaging data.
[0056] In the above embodiment, a second thermal imaging data is acquired and compared with the first thermal imaging data to obtain the difference between the two thermal imaging data.
[0057] S108. Set the temperature difference threshold between the first thermal imaging data and the second thermal imaging data;
[0058] Among them, a thermal imaging database of the target electrostatic discharge location is established;
[0059] An iterative strategy is set based on the temperature difference threshold obtained from the electrostatic discharge soft breakdown test at the target electrostatic discharge location. The temperature difference threshold is then adjusted according to the iterative strategy to make it approach the actual temperature difference threshold of the electrostatic discharge soft breakdown test at the target electrostatic discharge location.
[0060] In the above embodiments, a thermal imaging database of the target electrostatic discharge location is formed based on data obtained from multiple tests. The corresponding temperature difference threshold when the component is softly broken down during the electrostatic discharge soft breakdown test at the target electrostatic discharge location is obtained according to an iterative strategy. The temperature difference threshold is made closer to the true temperature difference threshold, thereby making the temperature difference threshold more accurate.
[0061] S110. If the temperature difference between the first thermal imaging data and the second thermal imaging data exceeds the temperature difference threshold, it is determined that a soft breakdown has occurred at the target electrostatic discharge location.
[0062] Among them, the component temperature difference threshold for electrostatic discharge soft breakdown test of each component at the target electrostatic discharge location is obtained;
[0063] Arrange and combine the temperature difference thresholds of each component, and calculate the combined temperature difference threshold for each combination;
[0064] Components that have been softly broken down can be identified by comparing temperature difference thresholds and combined temperature difference thresholds.
[0065] In the above embodiments, by setting a corresponding algorithm, the difference between the combined temperature difference threshold and the temperature difference threshold is used to determine the component whose target electrostatic discharge location has been softly broken down.
[0066] Furthermore, including:
[0067] Obtain the position information of each component at the target electrostatic discharge location;
[0068] By comparing the first and second thermal imaging data, information on the location of localized temperature rise anomalies can be obtained.
[0069] Compare the location information of localized temperature rise anomalies with the location information of each component, and set the breakdown weight of each component;
[0070] The components that have been softly broken down are determined by combining the combined temperature difference threshold and the breakdown weight.
[0071] In the above embodiments, based on the location information of the local temperature rise anomaly and the location information of each component, the temperature rise trend of each component is determined, and a breakdown weight is set for each component according to the temperature rise trend. The combined temperature difference threshold, temperature difference threshold and breakdown weight are combined for fusion calculation, and the components that have been softly broken down are analyzed and determined based on the calculation results.
[0072] Furthermore, a temperature difference threshold is set between the first and second thermal imaging data, including:
[0073] Based on the first and second thermal imaging data, an AI analysis system was built. The AI software was used to compare and analyze the temperature difference between the thermal images before and after the experiment, and to determine whether soft breakdown had occurred at the target electrostatic discharge location based on the temperature difference threshold.
[0074] In the above embodiment, two thermal imaging data points of the target discharge location, either outside or inside the vehicle, are input into AI analysis software. The AI software compares and analyzes the temperature difference between the thermal images before and after the test. If the temperature change exceeds a threshold (e.g., 15°C), soft breakdown may have occurred at the electrostatic discharge test point of the vehicle. Further disassembly and investigation are then conducted to pinpoint the soft breakdown components. Further, the above steps are followed to test other discharge locations.
[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A method for testing the electrostatic discharge soft breakdown of a vehicle, characterized in that, include: Acquire the first thermal imaging data of the target electrostatic discharge location of the stable operating vehicle; Perform a full-vehicle electrostatic discharge soft breakdown test on the target electrostatic discharge location; A second thermal imaging of the target electrostatic discharge location was collected after the test. Set a temperature difference threshold between the first and second thermal imaging data; If the temperature difference between the first and second thermal imaging data exceeds the temperature difference threshold, it is determined that a soft breakdown has occurred at the target electrostatic discharge location.
2. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 1, characterized in that, Before acquiring the first thermal imaging data of the target electrostatic discharge location of a stably operating vehicle, the following steps are included: The electrostatic discharge test setup for the exterior and / or interior of the vehicle shall be carried out in accordance with the standard GB / T 19951.
3. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 1, characterized in that, The first thermal imaging data of the target electrostatic discharge location of the stably operating vehicle also includes: Vehicle test conditions are set according to test standards; Turn on the vehicle-mounted electrical components and run them in a steady state for the preset test preparation time.
4. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 1, characterized in that, The first thermal imaging data of the target electrostatic discharge location of the stably operating vehicle also includes: The target electrostatic discharge location is scanned and photographed for the first time using a thermal imager, and the first thermal imaging data is obtained.
5. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 1, characterized in that, Perform a full-vehicle electrostatic discharge soft breakdown test on the target electrostatic discharge location, including: The target electrostatic discharge location was tested according to standard GB / T 19951.
6. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 5, characterized in that, A second thermal imaging dataset of the target electrostatic discharge location was acquired after the test, including: A second scan of the target electrostatic discharge location is performed using a thermal imager, and second thermal imaging data is obtained.
7. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 1, characterized in that, Setting the temperature difference threshold between the first and second thermal imaging data includes: Establish a thermal imaging database of target electrostatic discharge locations; An iterative strategy is set based on the temperature difference threshold obtained from the electrostatic discharge soft breakdown test at the target electrostatic discharge location. The temperature difference threshold is then adjusted according to the iterative strategy to make it approach the actual temperature difference threshold of the electrostatic discharge soft breakdown test at the target electrostatic discharge location.
8. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 7, characterized in that, include: Obtain the component temperature difference threshold for electrostatic discharge soft breakdown test of each component at the target electrostatic discharge location; Arrange and combine the temperature difference thresholds of each component, and calculate the combined temperature difference threshold for each combination; Components that have been softly broken down can be identified by comparing temperature difference thresholds and combined temperature difference thresholds.
9. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 8, characterized in that, include: Obtain the position information of each component at the target electrostatic discharge location; By comparing the first and second thermal imaging data, information on the location of localized temperature rise anomalies can be obtained. Compare the location information of localized temperature rise anomalies with the location information of each component, and set the breakdown weight of each component; The components that have been softly broken down are determined by combining the combined temperature difference threshold and the breakdown weight.
10. The method for testing the electrostatic discharge soft breakdown of a vehicle according to claim 1, characterized in that, Setting a temperature difference threshold between the first and second thermal imaging data includes: Based on the first and second thermal imaging data, an AI analysis system was built. The AI software was used to compare and analyze the temperature difference between the thermal images before and after the experiment, and to determine whether soft breakdown had occurred at the target electrostatic discharge location based on the temperature difference threshold.