MATEC Web of Conferences
Volume 59, 20162016 International Conference on Frontiers of Sensors Technologies (ICFST 2016)
|Number of page(s)||5|
|Section||Electronic engineering and sensing technology|
|Published online||24 May 2016|
Calibration and Distortion Field Compensation of Gradiometer and the Improvement in Object Remote Sensing
1 Northwest Institute of Nuclear Technology, Xi’an, China
2 Academy of Equipment, Beijing, China
3 National University of Defense Technology, Changsha, China
Magnetometer, misalignment error and distortion field can reduce the accuracy of gradiometers. So, it is important to calibrate and compensate gradiometers error. Scale factor, bias, nonorthogonality, misalignment and distortion field should be considered. A gradiometer is connected by an aluminium frame, which contains two fluxgate magnetometers. A nonmagnetic rotation equipment is used to change gradiometer attitude, and the compensation parameters are estimated. Experiment results show that, after calibration and compensation, error of each axis is reduced from 888.4 nT, 1292.6 nT and 168.9 nT to 15.3 nT, 22.1 nT and 9.9 nT, respectively. It shows that the proposed method can calibrate gradiometer and compensate distortion field. After calibration and compensation, the object remote sensing performance is improved.
© Owned by the authors, published by EDP Sciences, 2016
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