Study on direction detection of automobile headlamp beam

The beam direction is one of the important items of headlamp detection, but lots of internal detection machines can not give it an accurate detection. This article analyses the factors which affect the detection result, then gives a new accurate solution. It uses an automobile position fixing system and data correction algorithm. Firstly, the beam direction angle and the automobile's laying deviation angle can be got by using computer vision technique and image processing technique. Secondly, the beam direction angle can be corrected according to the automobile's laying deviation angle. This new method can efficiently find accurate optical axis direction of low beam and high beam. So it tells people whether the automobile works in good condition. It solves the detection problems of improper parking distance and improper laying position, decreases detection error and increases precision. What's more, it solves the internal actuality of inaccurate detection.