Automatic control method for irradiation height of automobile LED headlamp
A height and headlight technology, applied in vehicle components, optical signals, signal devices, etc., can solve the problems that affect the driver's judgment of the road ahead, and the difficulty of adaptive adjustment of the headlight control system, so as to achieve good detection results, Satisfy the actual measurement and avoid the effect of misjudgment
Pending Publication Date: 2022-02-18
JIANGSU UNIV OF SCI & TECH
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Problems solved by technology
However, when the vehicle is about to enter a low-lying or protruding road section, the AFS headlight control system is difficult to adjust adaptively, and the dark area of road lighting formed seriously affects the driver's judgment on the road ahead.
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[0049] The technical solution of the present invention will be further described below in conjunction with the accompanying drawings.
[0050] The geometric model that the present invention adopts, such as Figure 4 As shown, where O is the optical center of the camera, D is the horizontal distance from the road area to be measured to the camera, and h is the height of the vehicle camera from the ground.
[0051] Please refer to figure 1 and figure 2 , a kind of automatic control method of LED headlight irradiation height of automobile, comprises the steps:
[0052] S1. Reference image 3 , using an infrared laser transmitter to project a linear structured light pattern on the road in front of the vehicle;
[0053] In the step S1, the infrared laser emitter is fixed on the upper part of the vehicle body or on the roof, including two lasers on the left and right, and emits continuous or pulse-time cross-shaped spot infrared laser at the same time, and the projecting direct...
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The invention discloses an automatic control method for the irradiation height of an automobile LED headlamp, and the method comprises the steps: projecting a linear structured light pattern to a road surface in front of an automobile through an infrared laser transmitter, continuously collecting an image of the road surface in front of the automobile through an infrared camera, extracting the structured light pattern, analyzing the deformation condition of the structured light pattern, calculating and sending an included angle value between the road surface and an automobile body to the controller, so that automatic control of the irradiation height is realized. The pavement angle change condition can be rapidly analyzed, and misjudgment caused by the fact that the background of the area with the non-rich texture is similar to the target feature is avoided.
Description
technical field [0001] The invention relates to the technical field of automobile control, in particular to an automatic control method for the illumination height of automobile LED headlights. Background technique [0002] With the continuous improvement of automobile intelligence, the control of automobile headlights is no longer satisfied with manual control by the driver. Most vehicles have been equipped with Adaptive Front Lighting System (AFS) as a cornering auxiliary lighting system, which can make the car Automatically adjust the left and right steering angles when driving on the road. However, when the vehicle is about to enter a low-lying or protruding road section, the AFS headlight control system is difficult to adjust adaptively, and the resulting dark area of road lighting seriously affects the driver's judgment on the road ahead. Contents of the invention [0003] Purpose of the invention: In order to solve the problem that the headlight control system is...
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IPC IPC(8): B60Q1/08
CPCB60Q1/085
Inventor 李锋孙晗笑叶童玲施凯敏许袁蔡小若奚一昕汪平
Owner JIANGSU UNIV OF SCI & TECH