Journal
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
Volume 31, Issue 1, Pages 167-174Publisher
SPRINGER
DOI: 10.1007/s10854-019-02652-8
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This study presents a two-dimensional rotary sensor employing the impact of an externally exposed magnetic field on the inductance of coils with cores composed of suspended magnetic microrods. A mixture of polydimethylsiloxane and nickel microparticles in the average size of about 8-20 mu m was utilized as the inductor coil. Interestingly, the variations in the coils' inductance were effectively used to sense the rotations in both azimuth and elevation. A readout circuit was designed to convert the coils' inductance to voltage and demonstrated a conversion coefficient of 8.6 mV/degrees in azimuth and 19.1 mV/degrees in elevation. Due to the inexpensive utilized material and relatively simple fabrication process, the proposed rotary sensor can be a great candidate for this application.
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