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Dynamic headlamp lighting performance testing method based on whole vehicle

A technology for dynamic testing and headlights. It is applied to the alignment of automobile headlights, the testing of machine/structural components, and the testing of optical instruments. Problems such as deviations in lighting effects can be achieved to promote the development of automotive lighting technology, eliminate influences, and improve accuracy

Inactive Publication Date: 2020-08-28
中汽院智能网联科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing national standards only restrict the lighting requirements of headlamps from the perspective of light distribution, which is the technical requirement at the level of automotive lamp components.
After the car lights that meet the standards are installed on the vehicle, the lighting effect will be deviated due to factors such as installation position and dimming accuracy.
Especially in the actual use of the headlights, the vehicle is in a moving state. Due to the influence of the road surface, weather, and vehicle attitude, the dynamic performance and static illumination are quite different, which also leads to the legal light distribution standard not meeting the actual vehicle lighting. Performance Test Requirements

Method used

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  • Dynamic headlamp lighting performance testing method based on whole vehicle
  • Dynamic headlamp lighting performance testing method based on whole vehicle
  • Dynamic headlamp lighting performance testing method based on whole vehicle

Examples

Experimental program
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Embodiment 1

[0049] like figure 1 As shown, a kind of dynamic testing method based on vehicle headlight lighting performance of the present embodiment comprises the following steps:

[0050] S1, such as figure 2As shown, determine the track of test, in the present embodiment with two adjacent and respectively long 200-250m, the straight road of wide 3.5-3.75m is as the track of test; The 3.5m straight road is used as the test lane; mark the lane line in the center of the lane where the vehicle is located, record the coordinates of the lane line, take the point along the lane line as the end point of the vehicle’s first preset length, and set the end point of the drive as As the coordinate origin, set up the test system coordinate system; in the present embodiment, the first preset length is 250m, in other embodiments, the first preset length is determined with the length of the lane, such as a long 200m lane, the first preset length Let the length be 200m. In this embodiment, the lane ...

Embodiment 2

[0070] The difference between this embodiment and Embodiment 1 is that in this embodiment, when a vehicle-based dynamic test method for curve lighting performance of headlights is applied to the curve test, a length of 100-150 m and a width of 3.5 m is used in step S1. -3.75m single-lane curve as the test track; in this embodiment, it is specifically 120m long and 3.5m wide;

[0071] In step S3, such as Figure 4 As shown, the visibility reference measurement point is located on the boundary line of the lane, and the vertical distance from the ground is 25cm; the lateral distance between the glare reference measurement point and the lane line of the lane where the vehicle is located is 3.2-3.5cm, and 110cm from the ground; at the same time, the visibility reference measurement point , The X-axis coordinates of the glare reference measurement points projected on the ground are all 0. In this embodiment, the boundary line refers to the outermost drawn line of the single lane. ...

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Abstract

The invention relates to the technical field of vehicle testing, and particularly discloses a dynamic headlamp lighting performance testing method based on a whole vehicle, which comprises the following steps of: S1, establishing a testing system coordinate system; s2, acquiring lane line data; s3, setting illuminance data measurement points at two sides of the origin of coordinates; s4, collecting the motion data of the vehicle, and collecting the time-varying data of the illuminance of the headlamp of the vehicle at the illuminance data measurement point; s5, calculating the lateral deviation between the vehicle and the lane line based on the motion data and the lane line coordinates, and verifying whether the lateral deviation is within a preset deviation range or not; s6, correcting the contrast data by utilizing the spacing distance, the motion data and the lane line data to obtain corrected illumination data; and S7, carrying out synchronous processing on the interval distance and the corrected illuminance data by utilizing time to obtain an illuminance data curve changing along with the interval distance. By adopting the technical scheme of the invention, the accuracy of thelighting performance test can be improved.

Description

technical field [0001] The invention relates to the technical field of vehicle testing, in particular to a dynamic testing method for lighting performance of headlamps based on a complete vehicle. Background technique [0002] At present, more and more cars are considering the protection of occupants and pedestrians, especially at night or in poor light conditions, it becomes more difficult to know the road conditions, which is a test for drivers, and there are certain problems for pedestrians. risk. As the "eyes" of the car, good headlights can improve driving safety at night and make drivers more relaxed and comfortable when driving at night. For this reason, strict requirements are placed on the lighting performance of vehicle headlights. [0003] At present, the existing national standards only restrict the lighting requirements of headlamps from the perspective of light distribution, which is the technical requirement at the level of automotive lamp components. After ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/06
CPCG01M11/067
Inventor 陈媛媛李林张云飞邢春鸿张强李朝斌王刚
Owner 中汽院智能网联科技有限公司
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