Automatic calibration of magnetic tracking
Authors: Mingke Wang, Qing Luo, Yasha Iravantchi, XiaoMeng Chen, Alanson P. Sample, Kang G. Shin, Xiaohua Tian, Xinbing Wang, Dongyao Chen
Abstract
Magnetic sensing is emerging as an enabling technology for various engaging applications. Representative use cases include high-accuracy posture tracking, human-machine interaction, and haptic sensing. This technology uses multiple MEMS magnetometers to capture the changing magnetic field at a close distance. However, magnetometers are susceptible to real-world disturbances, such as hard- and soft-iron effects. As a result, users need to perform a cumbersome and lengthy calibration process frequently, severely limiting the usability of magnetic tracking.