Lane departure early warning method

A technology of deviation warning and road, applied in the direction of signal devices, etc., can solve the problems of not giving, the increase of calculation amount, and the effect of GPS signal validity, so as to reduce the probability of occurrence and ensure the effect of safety.

Inactive Publication Date: 2012-06-27
HUNAN UNIV
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Problems solved by technology

The lane departure warning system based on the vision system has been the most widely used due to its low cost, wide application range, and convenient implementation. At this stage, there are many lane departure warning products based on the vision system abroad, such as the Netherlands Mobile Eye C2 series, AURORA system developed by Carnegie Mellon University; there are also some research and development patents and related papers in China. The patent number is CN201633623U, an alarm that can be used for lane departure warning devices. It only studies the design method of the alarm output terminal. There is no specific control strategy related to the lane departure system; a lane departure warning device and warning method of the patent number CN101794367A, which needs to be equipped with a vehicle yaw acceleration sensor; a lane departure warning and driving recording system and method of the patent number CN101992778 and The Hough transform-based lane departure warning device of patent No. CN201712600 all uses the Hough transform algorithm to extract the straight line model, but the algorithm searches globally in the region of interest and has a large amount of calculation, which is not conducive to real-time calculation under high-speed vehicle operation. And due to the uncertainty of the actual curve curvature, the dimension increases when extracting the peak value of the curve parameters in the parameter space, and the a

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Example Embodiment

[0020] Such as figure 1 As shown, the road departure early warning system adopted in an embodiment of the present invention includes an image acquisition unit, a vehicle CAN bus, a control unit, a display, an audio codec unit, a buzzer, an SD card and a speaker, an image acquisition unit, a vehicle CAN bus and The control unit is two-way connected, the display, audio codec unit, buzzer, and SD card are connected to the control unit, and the audio codec unit is connected to the speaker.

[0021] Vehicle CAN bus uses 82C50 driver chip, image acquisition unit uses COMS or CCD camera, image pixels are not less than 700,000, viewing angle is not less than 90 degrees, color or black and white, video frame refresh rate is not less than 25 frames per second, installed in the rear view of the vehicle At the mirror, the audio codec unit uses TLV320AIC23 chip.

[0022] The control unit can be ARM series, DSP series, Blackfin series embedded processors, etc. The clock frequency of the control ...

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Abstract

The invention discloses a lane departure early warning method, which comprises a lane departure early warning system, wherein the lane departure early warning system comprises an image acquisition unit, a vehicle CAN bus, a control unit, a displayer, an audio coding and decoding unit, a buzzer, a security digital (SD) card and a loudspeaker, wherein the image acquisition unit, the vehicle CAN bus and the control unit are connected in two ways; the displayer, the audio coding and decoding unit, the buzzer and the SD card are connected with a control unit; and the audio coding and decoding unit is connected with a loudspeaker. The method disclosed by the invention can provide an in-time and effective early warning mechanism for the lane departure of an automobile, divide conditions of road ahead into far visual field road conditions and short visual field road conditions according to the calibration result of an image acquisition unit, provide near visual field lane departure early warning and far visual field inner curve lane vehicle speed early warning methods and effectively reduce traffic accidents.

Description

technical field [0001] The invention relates to the technical field of automotive electronics, in particular to a road departure warning method. Background technique [0002] The increasing number of cars has led to the emergence of new technologies for car safety, and the lane departure warning system has emerged as the times require. When the car is running at high speed, the lane departure system can effectively reduce the fatigue of the driver and reduce the probability of traffic accidents. It is an automobile safety technology worthy of vigorous research and promotion. The lane departure warning system based on the vision system has been the most widely used due to its low cost, wide application range, and convenient implementation. At this stage, there are many lane departure warning products based on the vision system abroad, such as the Netherlands Mobile Eye C2 series, AURORA system developed by Carnegie Mellon University; there are also some research and developm...

Claims

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Application Information

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IPC IPC(8): B60W50/08B60W40/10B60W40/109B60W40/105B60Q9/00
Inventor 宋晓琳张伟伟曹昊天欧阳维力王文涛
Owner HUNAN UNIV
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