Research On Imaging System To Eliminate Blind Zone Caused By Automotive A-pillar Based On Eye Location

At present,the most common ways of improving driving vision used by both domestic and foreign automotive engineers include using a thinner A-pillar,adding a triangular window next to the A-pillar or making the A-pillar hollow.However,all of these measures with regard to a new A-pillar design will reduce the safety rating of the whole vehicle.When a car accident happens,the vehicle with such A-pillar design can hardly guarantee the safety of the driver or the passengers.In view of this situation,this thesis study a blind spot-free imaging system for a vehicle based on human eyes location by combining embedded technology and eyes actual coordinate location method.The system is composed of S3C2440 A processor,infrared camera,screen,storage unit,light sensor,calibration key,stepper motor and stepper motor driver.After filtering and denoising the driver’s perspective image obtained by the camera,the system can easily obtain the actual center coordinates of the driver’s eyes in the cab by the optimized and improved eyes location algorithm,distortion coordinate point correction algorithm and monocular ranging algorithm.When the center position of the driver’s eyes has changed,the system adjusts the pulse input by the MCU to the stepper motor to adjust the angle of the camera outside the A-pillar to a suitable position.Basing on the correspondence between the actual coordinates of the driver’s eyes’ center and the optical axis angles of the left and right A-pillar cameras,the system eliminates the blind area of the A-pillar by displaying the real-time traffic images which has been adjusted by the angle of the camera outside the A-pillar.The test results show that the system can eliminate the blocking of the driver’s sight from the A-pillar without changing the stiffness of the A-pillar itself,and the purpose of eliminating the blind area of the A-pillar is achieved.