Vehicle location estimation based on a magnetic sensor array

This paper proposes a new algorithm to estimate vehicle location based on the uniform linear AMR sensor array. A new design and realization of the AMR sensor array is presented. The array consists of a group of 3-axis sensors. With the increase of the distances between the sensors and the vehicle, the magnetic field strength falls off inversely. Accordingly, a group of sensors can estimate the location of the vehicle. Based on this, each sensor measures the magnetic field disturbances independently. Multiple estimations are made using a sequence of samples, and a polynomial approximation method is applied to optimize the estimation. Experimental results are presented to show that the proposed algorithm and the AMR sensor array design are valid.