Research on Electromagnetic Positioning Calibration Technology Based on Kriging Interpolation

The electromagnetic positioning system is a system that uses the spatial magnetic field strength to obtain the position and direction angle of the receiving sensor in real time, and is widely used in virtual reality and medical navigation. Due to its inherent characteristics, the electromagnetic positioning system receiving sensor is easy to lost the accuracy and stability of its positioning and tracking results due to external interference, resulting in a large positioning error, so the calibration work is very important for it. In this paper, the spatial sampling points are divided into tetrahedrons by Delaunay triangulation to interpolate and the Kriging interpolation algorithm is used to compensate the accuracy. Through experiment and simulation, the position and direction angle accuracy is significantly improved, and it is shown that the performance of proposed method is better than traditional polynomial fitting and traditional interpolation algorithms.