Parameter setting method and system for automobile head-up display system test
By setting different levels of brightness, color temperature, sunlight parameters, temperature, and humidity during the testing of automotive head-up display systems, the problem that traditional testing methods cannot simulate the integrated state of the entire vehicle is solved, thus improving testing accuracy and driving safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHINA AUTOMOTIVE ENG RES INST
- Filing Date
- 2026-01-27
- Publication Date
- 2026-04-10
AI Technical Summary
Traditional head-up display system testing methods cannot accurately reflect the performance of the entire vehicle under integrated conditions, especially under sudden changes in temperature and lighting, which affects driving safety and user experience.
Different brightness, color temperature, sunlight parameters, temperature and humidity are set at different test task stages to simulate different road environments, especially when entering and exiting tunnels and starting cars in winter, adjusting brightness and temperature to adapt to sudden changes in light.
It improves testing accuracy and driving safety, ensures the display effect of HUD in different environments, avoids glare and blurring problems, and guarantees driving safety.
Smart Images
Figure CN121829978A_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of automotive electronics testing technology, and in particular relates to a parameter setting method and system for testing automotive head-up display systems. Background Technology
[0002] With the development of automotive intelligence, the head-up display (HUD) system, as a key human-machine interface, directly impacts driving safety and user experience through its optical performance. However, HUD testing methods rely on offline laboratory environments, which cannot accurately reflect the performance of the entire vehicle under integrated conditions.
[0003] Traditional head-up display (HUD) testing methods, while setting brightness, color temperature, and sunlight parameters according to actual conditions to meet the testing needs of automotive HUD systems under different road environment simulations and improve the realism of optical performance, fail to consider the sudden changes in temperature and light during the initial startup period of a car in winter, and during tunnel entry and exit. For example, after starting a car in winter, water vapor will form on the display interface, affecting HUD display performance; when entering a tunnel from a bright environment, the ambient light suddenly dims, and if the HUD brightness is not reduced in time, the displayed content will be too bright and glare-inducing; conversely, when exiting a tunnel, strong light may make the HUD content that has not been brightened in time appear blurry, affecting test results and driving safety during subsequent use. Furthermore, the impact of vehicle speed on test results under sudden changes in conditions is not considered. Summary of the Invention
[0004] To address the aforementioned problems, this invention proposes a parameter setting method and system for testing automotive head-up display (HUD) systems. During the daytime tunnel crossing phase, the brightness and temperature are reduced based on the parameters used in the high-speed midday sunshine test. During the tunnel exit phase, the parameters are restored to those used in the high-speed midday sunshine test. In the winter start-up phase, the temperature and humidity are increased based on the parameters used in the winter suburban road test. This approach considers the sudden changes in temperature and light during winter start-up and tunnel entry / exit, ensuring the effectiveness of the HUD system test and providing assurance for subsequent driving safety.
[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a parameter setting method for testing automotive head-up display systems, comprising: Different test tasks were determined according to the test time sequence; among them, the test tasks included the high-speed test at noon on a sunny day, the daytime tunnel crossing stage, the suburban road test in winter, and the vehicle winter start-up stage. Different brightness, color temperature, sunlight parameters, temperature, humidity, and video content environment parameters were set for different test task phases. Specifically, for the tunnel entry phase of the daytime tunnel crossing phase, the brightness and temperature were reduced based on the parameters of the high-speed phase at noon sunshine, while the tunnel exit phase of the daytime tunnel crossing phase restored the parameters of the high-speed phase at noon sunshine. For the winter car start-up phase, the temperature and humidity were increased based on the parameters of the winter suburban road phase.
[0006] Furthermore, during the tunnel entry phase of the daytime tunnel crossing, based on the parameters of the high-speed section at midday on a sunny day, when the brightness and temperature are reduced: ;
[0007] ; ; in, The brightness after reduction; The brightness of the highway section on a sunny midday day; This represents the percentage change in brightness. To simulate vehicle speed in real time; To preset the standard vehicle speed, ; The temperature after reduction; The temperature on the highway at noon on a sunny day; This represents the percentage change in temperature.
[0008] Furthermore, during the winter start-up phase of the vehicle, when the temperature and humidity are increased based on the parameters for suburban roads in winter: ; ; ;
[0009] in, To increase the temperature; Temperatures along suburban roads during winter; The number of simulated passengers inside the vehicle is less than the maximum passenger capacity. Maximum number of passengers allowed; This refers to the air conditioning temperature. For preset temperature, ; To increase the humidity; This refers to the humidity level on suburban roads during winter.
[0010] Furthermore, the test tasks also include benchmark tests, midday sunny highway tests, evening city commuting tests, and rainy city traffic congestion tests.
[0011] Furthermore, during the midday sunny highway phase, the brightness, color temperature, temperature, and humidity were set to 88000 Lux, 5800 K, 30℃, and 35%, respectively; the sun angle was set to 55° and the azimuth angle to 0°; the video content was set to a six-lane highway in both directions with green belts on both sides, an oncoming traffic flow of 10 vehicles per minute, no obstructions, and a clear blue sky.
[0012] Furthermore, during the evening urban commuting phase, the brightness, color temperature, temperature, and humidity were set to 18000 Lux, 2900 K, 23℃, and 50%, respectively; the sun angle was set to 18° and the azimuth angle to 30°; the video content was set to the evening rush hour on a main urban road, with four lanes in both directions, a traffic flow of 30 vehicles per minute, streetlights on both sides, pedestrian and shop lights on the roadside, and an orange-red sunset in the sky.
[0013] Furthermore, during the rainy urban congestion phase, the brightness, color temperature, temperature, and humidity were set to 5000 Lux, 6200 K, 20℃, and 88%, respectively; the sun angle was set to 32° and the azimuth angle to 15°; the video content was set to a congested section of the city ring road, with water reflecting off the road surface, buildings on both sides, a traffic flow of 5 vehicles per minute, visible rain streaks, and flashing traffic lights.
[0014] Furthermore, during the daytime tunnel crossing phase, the brightness, color temperature, temperature, and humidity were set to 2800 Lux, 4800 K, 20℃, and 65%, respectively; the sun angle was set to 32° and the azimuth angle to 15°; the video content was set to a two-way, two-lane highway tunnel with light gray concrete inner walls, LED strip lights installed at 5-meter intervals on the top, yellow reflective outline markers and emergency lane signs on both sides, a traffic flow of 12 vehicles per minute, a bright spot of natural light visible at the tunnel exit at 50 meters, no oncoming traffic converging, and no pedestrians or obstacles inside the tunnel.
[0015] Furthermore, in the winter suburban road phase, the brightness, color temperature, temperature, and humidity were set to 18000 Lux, 5800 K, 7℃, and 45%, respectively; the sun angle was set to 22° and the azimuth angle to 45°; the video content was set to a two-lane road in the suburbs, with fallen leaves on the road surface, farmland and villages on both sides, a traffic flow of 3 vehicles per minute, tree shadows, and a pale blue sky.
[0016] Secondly, the present invention also provides a parameter setting system for testing automotive head-up display systems, comprising: The test task determination module is configured to determine different test tasks according to the test time sequence; among them, the test tasks include the midday sunny highway test, the daytime tunnel crossing test, the winter suburban road test, and the winter vehicle start-up test. The parameter setting module is configured to set different brightness, color temperature, sunlight parameters, temperature, humidity, and video content environment parameters for different test task stages. Specifically, for the tunnel entry stage of the daytime tunnel crossing stage, the brightness and temperature are reduced based on the parameters of the high-speed stage under sunny midday conditions, while the tunnel exit stage of the daytime tunnel crossing stage restores the parameters of the high-speed stage under sunny midday conditions. For the winter car start-up stage, the temperature and humidity are increased based on the parameters of the winter suburban road stage.
[0017] Thirdly, the present invention also provides a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the parameter setting method for testing an automotive head-up display system as described in the first aspect.
[0018] Fourthly, the present invention also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, wherein the processor executes the program to implement the steps of the parameter setting method for testing an automotive head-up display system as described in the first aspect.
[0019] Fifthly, the present invention also provides a computer program product, the computer program product comprising a computer program, which, when executed by a processor, implements the steps of the parameter setting method for testing automotive head-up display systems as described in the first aspect.
[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: 1. This invention sets different brightness, color temperature, sunlight parameters, temperature, humidity, and video content environment parameters at different test task stages to achieve the purpose of simulating different road environment tests. Specifically, in the tunnel entry stage of the daytime tunnel crossing stage, the brightness and temperature are reduced based on the parameters of the high-speed stage under sunny midday conditions, while the tunnel exit stage of the daytime tunnel crossing stage restores the parameters of the high-speed stage under sunny midday conditions. In the winter car start-up stage, the temperature and humidity are increased based on the parameters of the winter suburban road stage. It takes into account the sudden changes in temperature and light during the winter car start-up and tunnel entry and exit processes, ensuring the effectiveness of the car head-up display system test and providing a guarantee for subsequent driving safety.
[0021] 2. In this embodiment, the influence of vehicle speed changes on brightness changes is considered. The change in brightness after speed reduction is used to represent the instantaneous impact on the detection results. That is, the higher the vehicle speed, the greater the impact of brightness changes upon entering the tunnel on the detection. In this case, increasing the brightness change ratio improves the simulation accuracy of the actual tunnel entry conditions and enhances the testing accuracy. At the same time, the influence of vehicle speed changes on temperature changes is considered. The change in temperature after speed reduction is used to represent the instantaneous impact on the detection results. That is, the higher the vehicle speed, the smaller the impact of temperature changes upon entering the tunnel on the detection. In this case, reducing the temperature change ratio further improves the simulation accuracy of the actual tunnel entry conditions and enhances the testing accuracy.
[0022] 3. This invention takes into account the number of people inside the vehicle and the air conditioning temperature. When the number of people inside the vehicle and the air conditioning temperature increase, the temperature and humidity increase values increase, which improves the simulation accuracy of the actual working conditions when entering the tunnel and improves the test accuracy. At the same time, considering the number of people inside the vehicle, when the number of people inside the vehicle increases, the humidity increase value increases, which further improves the simulation accuracy of the actual working conditions when entering the tunnel and improves the test accuracy. Attached Figure Description
[0023] The accompanying drawings, which form part of this embodiment, are used to provide a further understanding of this embodiment. The illustrative embodiments and their descriptions are used to explain this embodiment and do not constitute an improper limitation of this embodiment.
[0024] Figure 1 This is a flowchart of the method in Embodiment 1 of the present invention. Detailed Implementation
[0025] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0026] It should be noted that the following detailed descriptions are exemplary and intended to provide further explanation of this application. Unless otherwise specified, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.
[0027] Example 1: This embodiment provides a testing method for automotive head-up display systems, and importantly, proposes a parameter determination method for the testing method; the overall testing method includes: S1. Preparation of test equipment: The testing equipment mainly includes a vehicle automated testing system and a road environment simulation system.
[0028] S1.1 The automated vehicle testing system / platform is primarily responsible for establishing a unified coordinate system for the vehicle environments of different models and performing optical tests at the designed test locations on the vehicle. The automated vehicle testing system / platform includes, but is not limited to, a vehicle alignment platform, wheel arch measuring devices, optical inspection devices, measurement drive devices, vehicle communication interfaces, and equipment calibration templates. The structure and functions of the automated vehicle testing system / platform can be implemented using existing technologies and will not be detailed here.
[0029] S1.2 The road environment simulation system is primarily responsible for adjusting parameters such as lighting, color temperature, humidity, and background in a controllable and repeatable manner to reproduce various types of roads and natural environments within the laboratory. Optionally, the road environment simulation system includes a natural light simulation system, a road background simulation system, and a temperature and humidity simulation system. The natural light simulation system includes an ambient light simulation device for controlling the overall brightness and color temperature, and a sunlight simulation system that can simulate the angle and position of sunlight. The road background simulation system includes a display screen surrounding the front of the vehicle that can play simulated background videos. The temperature and humidity simulation system includes an air conditioning system and a humidification system, which can precisely control the temperature and humidity in the environment. The road environment simulation system also includes environmental sensing devices, including but not limited to fiber optic sensors, color temperature testing devices, and temperature and humidity sensors, for sensing whether the current environmental control has reached the set values.
[0030] S2, Testing Process: The testing process consists of two phases: preparation and testing. The specific steps are as follows: S2.1, Preparation Stage: S2.1.1 Calibration of the vehicle automated testing system: Determine the coordinate system of the testing environment.
[0031] The equipment calibration template is placed on the vehicle centering platform. The calibration template is a large metal part with high precision machining. Calibration parts for each piece of equipment are set on top. It has been calibrated at the factory.
[0032] The alignment performance of the vehicle alignment platform, the installation posture of the wheel arch measuring device, and the installation positions and postures of the measuring drive device and the optical inspection device were confirmed using a calibration template. Optionally, the measuring drive device is mainly composed of a collaborative robot, and the measuring drive device and the optical inspection device are rigidly connected by connectors. The two can determine their own installation postures through a universal hand-eye calibration method.
[0033] S2.1.2 Vehicle Model Configuration for Automated Testing System: Configure the required parameters for the system based on the vehicle model information.
[0034] Optional configuration items include, but are not limited to, vehicle design wheelbase, design wheel arch height, design track width, design inspection eye box information, measurement drive movement path, optical test content, and vehicle-related details.
[0035] S2.1.3 Road Environment Simulation System Configuration (Parameter Setting Method for Vehicle Head-Up Display System Testing): The configuration includes, but is not limited to, the brightness, color temperature, and position of simulated sunlight in the natural light simulation system; the video content played in the road background simulation system; and the temperature and humidity parameters controlled in the temperature and humidity simulation system. The final configuration will form a benchmark test environment (no road simulation, no sunlight, normal temperature environment) and several simulated road test environments.
[0036] The parameter determination method in this embodiment is mainly for setting several simulated road test environments, including: The entire testing process was divided into several tasks according to the test time sequence, including benchmark testing, midday sunny highway testing, evening urban commuting testing, rainy urban congestion testing, daytime tunnel crossing testing, winter suburban road testing, and winter vehicle starting environment testing. Different reference environmental parameters were set for each test task, as shown in Table 1.
[0037] Table 1 Reference Environmental Parameters Parameter name brightness Color temperature Sunlight parameters Video content temperature humidity Benchmarking environment / / / / 25℃ 65% Noon Sunny Day Highway 88000Lux 5800K Depression 55° / Azimuth 0° / 6000K / 95000Lux The highway has six lanes in both directions, a dry road surface, green belts on both sides, sparse oncoming traffic (about 10 vehicles per minute), and unobstructed views in the distance with a clear blue sky. 30℃ 35% Dusk city commuting 18000 Lux 2900K Depression angle 18° / Azimuth angle 30° / 3200K / 25000Lux During the evening rush hour, the main urban road has four lanes in both directions, with heavy traffic (approximately 30 vehicles per minute). Streetlights are just beginning to illuminate the roadside, and pedestrians and shop lights are visible. The sky is a vibrant orange-red sunset. 23℃ 50% Rainy day city traffic congestion 5000 Lux 6200K Depression angle 32° / Azimuth angle 15° / 6200K / 6500Lux The city ring road was congested, with glare from standing water on the road surface, buildings on both sides, and traffic moving slowly (about 5 vehicles per minute). Raindrops were clearly visible, and traffic lights were flashing in the distance. 20℃ 88% Daytime tunnel crossing 2800 Lux 4800K / The tunnel is a two-lane, two-way road tunnel with light gray concrete walls. LED strip lights (forming a continuous light band) are installed at 5-meter intervals on the ceiling. The road surface is dry and smooth. Yellow reflective markers and emergency lane signs are present on both sides. Traffic flow is steady (approximately 12 vehicles per minute). A bright spot of natural light is visible 50 meters ahead at the tunnel exit. There is no convergence of oncoming traffic, and no pedestrians or obstacles are present inside the tunnel. 20℃ 65% Winter suburban roads 18000 Lux 5800K Depression 22° / Azimuth 45° / 5200K / 20000Lux The road is a two-lane road in both directions in the suburbs. The road surface is dry with a few fallen leaves. There are farmlands and low-lying villages on both sides. Traffic is sparse (about 3 vehicles per minute). There are tree shadows in the distance, and the sky is pale blue. 7℃ 45% By setting different reference environmental parameters for different test tasks, the test results of the automotive head-up display system were ensured, which is beneficial to improving driving safety in the later stages. In addition, during actual driving, after starting a car in winter, water vapor may form on the display interface due to the increased air temperature and the lower surface temperature of the display screen, affecting the HUD display performance. When entering a tunnel from a bright environment, the ambient light suddenly dims; if the HUD brightness is not reduced in time, the displayed content will be too bright and glaring, causing glare. Conversely, when exiting a tunnel, strong light may make the HUD content, which has not been brightened in time, appear blurry, affecting the test results and driving safety in later use. Therefore, in this application, the environmental parameter settings consider the parameters for daytime tunnel crossing and winter car start-up. During the tunnel entry phase of the daytime tunnel crossing stage, the brightness and temperature are reduced based on the parameters for the midday sunny highway stage; the parameters for exiting the tunnel during the daytime tunnel crossing stage are restored to the midday sunny highway stage parameters. During the winter car start-up stage, the temperature and humidity are increased based on the parameters for the winter suburban road stage.
[0038] During the tunnel entry phase of daytime tunnel crossing, when brightness and temperature are reduced based on the parameters for the high-speed section at midday on a sunny day: ;
[0039] ; ; in, The brightness after reduction; The brightness of the high-speed segment on a sunny midday day is 88,000 Lux. This represents the percentage change in brightness. To simulate vehicle speed in real time, the values are non-zero changes. To preset the standard vehicle speed, ; The temperature after reduction; The temperature on the highway at noon on a sunny day was 30℃. This represents the percentage change in temperature.
[0040] The faster the vehicle speed, the shorter the time spent entering the tunnel. Although the brightness change value remains constant, the rapid change in brightness can affect the driver's reaction and adaptation to the display screen. In this embodiment, the impact of vehicle speed changes on brightness changes is considered, and the change in brightness after speed reduction is used to represent the instantaneous impact on the detection results. That is, the higher the vehicle speed, the greater the impact of brightness changes upon entering the tunnel on the detection. In this case, increasing the brightness change ratio (increasing the brightness reduction value) improves the simulation accuracy of the actual tunnel entry conditions and enhances the testing accuracy. Simultaneously, the higher the vehicle speed, the smaller the impact of temperature changes upon entering the tunnel on the detection (temperature affects the display screen over time). Considering the impact of vehicle speed changes on temperature changes, the change in temperature after speed reduction is used to represent the instantaneous impact on the detection results. That is, the higher the vehicle speed, the smaller the impact of temperature changes upon entering the tunnel on the detection. In this case, decreasing the temperature change ratio (decreasing the temperature reduction value) further improves the simulation accuracy of the actual tunnel entry conditions and enhances the testing accuracy.
[0041] During the winter start-up phase of a car, when the temperature and humidity are increased based on the parameters for winter suburban roads: ; ; ;
[0042] in, To increase the temperature; The temperature on suburban roads during winter is 7°C. The number of simulated passengers inside the vehicle is less than the maximum passenger capacity. Maximum number of passengers allowed; This refers to the air conditioning temperature. For preset temperature, ; To increase the humidity; The humidity level on suburban roads during winter is 45%.
[0043] An increase in the number of people inside the vehicle and the air conditioning temperature will drastically increase the temperature difference between the display screen and the environment. In this embodiment, considering the simulated number of people inside the vehicle and the air conditioning temperature, the increase in temperature and humidity increases with the increase in the simulated number of people inside the vehicle and the air conditioning temperature, thus improving the accuracy of the simulation of the actual working conditions when entering the tunnel and improving the test accuracy. At the same time, an increase in the number of people inside the vehicle will drastically increase the humidity. In this embodiment, considering the simulated number of people inside the vehicle, the increase in humidity increases with the increase in the simulated number of people inside the vehicle, further improving the accuracy of the simulation of the actual working conditions when entering the tunnel and improving the test accuracy. It should be noted that during the vehicle start-up phase, the relationship between the temperature setting and humidity change of the in-vehicle air conditioning is not directly linear, but is closely related to the operating mode of the air conditioning system. Therefore, the air conditioning temperature is not considered here.
[0044] S2.2, Testing Phase: S2.2.1 Vehicle positioning: Guide vehicles to enter and locate vehicles and equipment.
[0045] The vehicle is driven onto the vehicle alignment platform, which uses internal push blocks and guide rollers to align the vehicle and achieve vehicle positioning.
[0046] Depending on the vehicle model, the configuration of the automated testing system is loaded, and the optical inspection device is moved to the designed eye box position using the measurement drive device to achieve coarse positioning of the eye box.
[0047] Due to factors such as suspension springs and tire pressure, the overall height of a vehicle may differ from its design dimensions, necessitating correction of the wheel arch position using the parameters mentioned above. Specifically, the wheel arch measurement system measures the height of all four wheel arches and, combined with vehicle parameters including the design wheelbase, design wheel arch height, design track width, and design wheel arch information, calculates the corrected wheel arch position using a universally applicable calculation method.
[0048] The optical detection device is moved to the position of the corrective eye box using a measurement drive device.
[0049] S2.2.2, Reference Optical Test: The optical performance of the head-up display is tested without using a simulated environment.
[0050] The road environment simulation system loads a benchmark test environment. Based on the optical test content in the vehicle configuration, the optical performance of the head-up display is tested sequentially; optionally, the vehicle communication interface is used to automatically switch the test images required for each optical test item. The tests generate benchmark test results.
[0051] S2.2.3 Simulated road environment test: The experimental environment was simulated in sequence to test the optical performance of the head-up display under different environments.
[0052] The road environment simulation system loads a simulated road test environment N. Using a general control strategy (e.g., PID control), it waits for the test environment to reach and maintain the set parameters within their tolerance range. Based on the optical test content in the vehicle configuration, the optical performance of the head-up display is tested sequentially; optionally, the vehicle communication interface is used to automatically switch the test images required for each optical test item. The test generates a simulated road test result N. The above process is repeated until all simulated road test environments are completed.
[0053] Example 2: This embodiment provides a parameter setting system for testing automotive head-up display systems, including: The test task determination module is configured to determine different test tasks according to the test time sequence; among them, the test tasks include the midday sunny highway test, the daytime tunnel crossing test, the winter suburban road test, and the winter vehicle start-up test. The parameter setting module is configured to set different brightness, color temperature, sunlight parameters, temperature, humidity, and video content environment parameters for different test task stages. Specifically, for the tunnel entry stage of the daytime tunnel crossing stage, the brightness and temperature are reduced based on the parameters of the high-speed stage under sunny midday conditions, while the tunnel exit stage of the daytime tunnel crossing stage restores the parameters of the high-speed stage under sunny midday conditions. For the winter car start-up stage, the temperature and humidity are increased based on the parameters of the winter suburban road stage.
[0054] The operating method of the system is the same as the parameter setting method for testing the automotive head-up display system in Embodiment 1, and will not be repeated here.
[0055] Example 3: This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the steps of the parameter setting method for testing automotive head-up display systems as described in Embodiment 1.
[0056] Example 4: This embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor. When the processor executes the program, it implements the steps of the parameter setting method for testing automotive head-up display systems described in Embodiment 1.
[0057] Example 5: This embodiment provides a computer program product, which includes a computer program. When the computer program is executed by a processor, it implements the steps of the parameter setting method for testing automotive head-up display systems as described in Embodiment 1.
[0058] The above description is merely a preferred embodiment of this practice and is not intended to limit the scope of this practice. Various modifications and variations can be made to this practice by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this practice should be included within the protection scope of this practice.
Claims
1. A parameter setting method for testing automotive head-up display systems, characterized in that, include: Different test tasks were determined according to the test time sequence; among them, the test tasks included the high-speed test at noon on a sunny day, the daytime tunnel crossing stage, the suburban road test in winter, and the vehicle winter start-up stage. Different brightness, color temperature, sunlight parameters, temperature, humidity, and video content environment parameters were set for different test task phases. Specifically, for the tunnel entry phase of the daytime tunnel crossing phase, the brightness and temperature were reduced based on the parameters of the high-speed phase at noon sunshine, while the tunnel exit phase of the daytime tunnel crossing phase restored the parameters of the high-speed phase at noon sunshine. For the winter car start-up phase, the temperature and humidity were increased based on the parameters of the winter suburban road phase.
2. The parameter setting method for testing automotive head-up display systems as described in claim 1, characterized in that, During the tunnel entry phase of the daytime tunnel crossing, when brightness and temperature are reduced based on the parameters of the high-speed section at midday on a sunny day: ； ； ； in, The brightness after reduction; The brightness of the highway section on a sunny midday day; This represents the percentage change in brightness. To simulate vehicle speed in real time; To preset the standard vehicle speed, ; The temperature after reduction; The temperature on the highway at noon on a sunny day; This represents the percentage change in temperature.
3. The parameter setting method for testing automotive head-up display systems as described in claim 1, characterized in that, During the winter start-up phase of a vehicle, when the temperature and humidity are increased based on the parameters for suburban roads in winter: ； ； ； in, To increase the temperature; Temperatures along suburban roads during winter; The number of simulated passengers inside the vehicle is less than the maximum passenger capacity. Maximum number of passengers allowed; This refers to the air conditioning temperature. For preset temperature, ; To increase the humidity; This refers to the humidity level on suburban roads during winter.
4. The parameter setting method for testing automotive head-up display systems as described in claim 1, characterized in that, The testing tasks also include benchmark tests, midday sunny highway tests, evening city commuting tests, and rainy city traffic congestion tests.
5. The parameter setting method for testing automotive head-up display systems as described in claim 4, characterized in that, During the midday sunny highway phase, the brightness, color temperature, temperature, and humidity were set to 88000 Lux, 5800 K, 30℃, and 35%, respectively; the sun angle was set to 55° and the azimuth angle to 0°; the video content was set to a six-lane highway with green belts on both sides, an oncoming traffic flow of 10 vehicles per minute, no obstructions, and a clear blue sky.
6. The parameter setting method for testing automotive head-up display systems as described in claim 4, characterized in that, During the evening urban commute, the brightness, color temperature, temperature, and humidity were set to 18000 Lux, 2900 K, 23℃, and 50%, respectively; the sun angle was set to 18° and the azimuth angle to 30°; the video content was set to the evening rush hour on a main urban road, a two-way four-lane road with a traffic flow of 30 vehicles per minute, streetlights on both sides, pedestrian and shop lights on the roadside, and an orange-red sunset in the sky.
7. The parameter setting method for testing automotive head-up display systems as described in claim 4, characterized in that, During the rainy urban congestion phase, the brightness, color temperature, temperature, and humidity were set to 5000 Lux, 6200 K, 20℃, and 88%, respectively; the sun angle was set to 32° and the azimuth angle to 15°; the video content was set to a congested section of the city ring road, with water reflecting off the road surface, buildings on both sides, a traffic flow of 5 vehicles per minute, visible rain streaks, and flashing traffic lights.
8. The parameter setting method for testing automotive head-up display systems as described in claim 4, characterized in that, During the daytime tunnel crossing phase, the brightness, color temperature, temperature, and humidity were set to 2800 Lux, 4800 K, 20℃, and 65%, respectively; the sun angle was set to 32° and the azimuth angle to 15°; the video content was set to a two-way, two-lane highway tunnel with light gray concrete inner walls, LED strip lights installed at 5-meter intervals on the top, yellow reflective outline markers and emergency lane signs on both sides, a traffic flow of 12 vehicles per minute, a bright spot of natural light visible at the tunnel exit at 50 meters, no oncoming traffic converging, and no pedestrians or obstacles inside the tunnel.
9. The parameter setting method for testing automotive head-up display systems as described in claim 4, characterized in that, During the winter suburban road phase, the brightness, color temperature, temperature, and humidity were set to 18000 Lux, 5800 K, 7℃, and 45%, respectively; the sun angle was set to 22° and the azimuth angle to 45°; the video content was set to a two-lane road in the suburbs, with fallen leaves on the road, farmland and villages on both sides, a traffic flow of 3 vehicles per minute, tree shadows, and a pale blue sky.
10. A parameter setting system for testing automotive head-up display systems, characterized in that, include: The test task determination module is configured to determine different test tasks according to the test time sequence; among them, the test tasks include the midday sunny highway test, the daytime tunnel crossing test, the winter suburban road test, and the winter vehicle start-up test. The parameter setting module is configured to set different brightness, color temperature, sunlight parameters, temperature, humidity, and video content environment parameters for different test task stages. Specifically, for the tunnel entry stage of the daytime tunnel crossing stage, the brightness and temperature are reduced based on the parameters of the high-speed stage under sunny midday conditions, while the tunnel exit stage of the daytime tunnel crossing stage restores the parameters of the high-speed stage under sunny midday conditions. For the winter car start-up stage, the temperature and humidity are increased based on the parameters of the winter suburban road stage.