The Freescale Cup National Undergraduate Smart Car Competition for the background, how electromagnetic smart car road information from the limited body to extract the deviation from the actual center of the runway. Traditional method is based around two inductive voltage value or the difference calculating a normalized value calculated in order to obtain a deviation from the track center of said body center level. However, these algorithms are present enough deviation calculated from linear defects, the need to rely on steering angle deviation for the body and the motor acceleration and deceleration of the intelligent vehicle control system is concerned this is a big problem. This paper presents a new method of calculating theoretically proved through simulation Maple normalization algorithm to solve the difference algorithm and drawbacks. By applying this algorithm to the actual competition, which validate the algorithm.