The design and implementation of automated smart car system based on camera

In this paper, we have designed and implemented an automated smart car system based on camera. With the Freescale MC9S12XS128 microprocessor as its control centre, the system is consisted of both Software and Hardware. At first, the system extracts the horizontal signal and vertical signal from the camera video signal through the LM1881 external circuit, and then the MCU acquires the real time road images by capturing the horizontal and vertical interrupt signal. Combined with the continuity character of the road, the leading line position in the image can be extracted by edge detection algorithm, and then accomplish the steering and speed control of the smart car by PID algorithm. In addition, by adding the Beam Splitter at the input terminal of the camera, the system effectively lessens the impact from illumination to image formation. The system has also introduced speed measuring module to supply effective real time feedback for PID control algorithm. According to tests carried on specialized racing tracks, the system possesses great robustness and feasibility with great market prospect on a long view.