The design of the tracing system requires the car to automatically identify the presupposed roads, according to the design of the route for automatic tracking. This paper will study the software and hardware design method of using dot-matrix infrared photoelectric sensor as path acquisition module to realize automatic tracing. The PID control algorithm based on BP Neural Network is adopted for both the rudder and the motor, which effectively avoids the overshoot and oscillation phenomenon of

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... intelligent vehicle due to the step change of steering and speed regulation, so as to realize the fast and smooth self-driving of the intelligent vehicle along the given black line.