Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/43600
Title: Electromagnetic navigation linear displacement transducer based on magnetic field gradient technique
Authors: Zhang, M
Or, SW 
Wang, S
Chang, FK
Keywords: Counter-wound coils
Electromagnetic navigation
Linear displacement transducer
Magnetic field gradients
Issue Date: 2015
Publisher: Institute of Electrical and Electronics Engineers
Source: IEEE transactions on magnetics, 2015, v. 51, no. 11, 7116575 How to cite?
Journal: IEEE transactions on magnetics 
Abstract: A linear displacement transducer (LDT) for electromagnetic navigation is developed based on the sensing of magnetic field gradients in a pair of counterwound coils. The operation and linear response conditions of the LDT are theoretically described by electromagnetic formulations, numerically analyzed by COMSOL Multiphysics finite-element analysis, and experimentally verified in a 1/10-scaled inspection vehicle-overhead cable model. A high sensitivity of 51 V/cm and a small nonlinearity of 3.7% are achieved in the LDT prototype by setting an optimal height-to-baseline h/L ratio of 1/ 8 in a practical linear response condition with the transverse displacement d constraint of }50% of L. The proposed LDT can overcome the discontinuous response and nonlinearity problems intrinsic in traditional magnetic field-based LDTs, thereby providing a continuous displacement (movement) feedback with an accuracy of within several millimeters.
URI: http://hdl.handle.net/10397/43600
ISSN: 0018-9464 (print)
1941-0069 (online)
DOI: 10.1109/TMAG.2015.2440472
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