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A multilayer planar inductor based proximity sensor operating at 4.2 K

Sagar, Pankaj and Gour, Abhay Singh and Karunanithi, R (2017) A multilayer planar inductor based proximity sensor operating at 4.2 K. In: SENSORS AND ACTUATORS A-PHYSICAL, 264 . pp. 151-156.

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Official URL: http://doi.org/10.1016/j.sna.2017.07.042

Abstract

The design, development and testing of a multilayer planar inductor based eddy current proximity/displacement transducer is presented. Proximity/displacement of a metal surface/target in the range of 0-5 mm could be measured. The use of a cold electronics based LC oscillator operating at 4.2 K using thermal cycled stable components is reported. The frequency modulated (FM) oscillator output is a function of displacement. Calibration of the developed sensor at cryogenic temperatures was performed to ascertain the sensitivity and repeatability. Impedance analysis of the planar multilayer inductor is presented and its Q-factor is determined. Experimental results of the noise characteristics of the oscillator at various temperatures are also discussed. The developed sensor has good thermal stability, sensitivity and repeatability at the cryogenic operating temperatures. (C) 2017 Elsevier B.V. All rights reserved.

Item Type: Journal Article
Additional Information: Copy right for this article belongs to the ELSEVIER SCIENCE SA, PO BOX 564, 1001 LAUSANNE, SWITZERLAND
Department/Centre: Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Depositing User: Id for Latest eprints
Date Deposited: 21 Oct 2017 06:17
Last Modified: 21 Oct 2017 06:17
URI: http://eprints.iisc.ac.in/id/eprint/58067

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