Date of Publication:2018-01-01

Journal:大连理工大学学报

Volume:58

Issue:1

Page Number:105-110

ISSN No.:1000-8608

Abstract:In MIMU (magnetic and inertial measurement unit)-based human motion capture technology,the calibration of magnetometer is necessary for each MIMU prior to use.Since a human motion capture system includes about seven to a dozen of MIMUs,the shortening of the total time is of critical importance to the magnetometer's calibration.Magnetometer calibration method involves two rotation modes,i.e.,along a ∞-shape traj ectory and around each single axis.An appropriate calibration method by which the rotation form and the number of rotations are identified,is proposed to reduce the calibration time and to accurately calibrate the magnetometer.The optimal rotation form and the number of rotations are determined based on the RMSE of the origin and the long radius of the ellipsoid model,which is obtained by least squares ellipsoid fitting method.The test results demonstrate that one time rotation calibration method around each axis is highly effective for human motion capture.

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