Magnetic dipole localization and magnetic moment estimation method based on normalized source strength

摘要

Based on the virtue of complete isotropy around a dipole source, the normalized source strength (NSS) is introduced to the scalar triangulation and ranging (STAR) method to replace the original tensor contraction and a new real-time magnetic dipole localization method without asphericity error is proposed in this paper. Firstly, three unknown parameters of bearing vector are estimated by solving the equations about the NSS of six faces of the magnetometer cube. Secondly, the magnitude of magnetic moment vector is estimated using NSS and magnitude of the estimated bearing vector. Thirdly, linear equations about three unknown parameters of unit magnetic moment vector are established using the intermediate eigenvalues and NSS of six faces of the cube, and the least square solution is given. Simulations without and with measurement noises have been done to evaluate the performance of the proposed method. The results show that the proposed algorithm is correct in theory and the estimation results are more accurate than two other improved STAR methods.