Calibration and correction of the device measuring magnetic gradient tensor

Yu Huang; Li-hua Wu

doi:10.1117/12.2019694

19 March 2013 Calibration and correction of the device measuring magnetic gradient tensor

Yu Huang, Li-hua Wu

Proceedings Volume 8762, PIAGENG 2013: Intelligent Information, Control, and Communication Technology for Agricultural Engineering; 876211 (2013) https://doi.org/10.1117/12.2019694
Event: Third International Conference on Photonics and Image in Agriculture Engineering (PIAGENG 2013), 2013, Sanya, China

Abstract

Generally, four three-axis magnetometers (TAMs) are used to measure magnetic gradient tensor. But the measurement precision of magnetic gradient tensor is tightly connected with the imperfect performance of sensors such as non-orthogonality, different scale factors and biases among sensitive axes, misalignment between different TAMs. It is necessary to calibrate and correct the measurement device to obtain precise magnetic gradient tensor. A mathematical model for calibration of the device measuring magnetic gradient tensor is established, and the calibration algorithm and its steps based on functional link artificial neural network (FLANN) and least-squares method (LSM) are proposed. The numerical simulations prove the effectiveness and good convergence of calibration algorithm, which can improve remarkably the measurement precision of magnetic gradient tensor.

Citation Download Citation

Yu Huang and Li-hua Wu "Calibration and correction of the device measuring magnetic gradient tensor ", Proc. SPIE 8762, PIAGENG 2013: Intelligent Information, Control, and Communication Technology for Agricultural Engineering, 876211 (19 March 2013); https://doi.org/10.1117/12.2019694

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