Multilayer planar inductor array based angular position sensor for cryogenic application

Sagar, Pankaj and Hassan, Harris K and Gour, Abhay Singh and Karunanithi, R (2018) Multilayer planar inductor array based angular position sensor for cryogenic application. In: CRYOGENICS, 96 . pp. 18-24.

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Abstract

The design, development and testing of a cryogenically operated multilayer planar inductor array based eddy current angular position/rotation transducer is claimed. An array of 4 multi-layered coils is used to divide the 360 degrees into four sectors of 90 degrees each. Switching between each of the inductor is done by a cold electronics based multiplexer circuit coupled to an unbuffered inverter LC oscillator. The angular displacement is a function of frequency of cold electronic LC oscillator. The pickup coil forms the inductor of the oscillator which is operated down to 4.2 K and uses thermal cycled stable components. The change in frequency as a function of angular displacement was calibrated at cryogenic temperatures. The developed sensor was found to have good thermal stability, sensitivity and repeatability over the entire cryogenic range.

Item Type:	Journal Article
Publication:	CRYOGENICS
Publisher:	ELSEVIER SCI LTD
Additional Information:	Copyright of this article belongs to ELSEVIER SCI LTD
Keywords:	Multilayer inductor array; Eddy current; Multiplexed LC oscillator; Cold electronics; Angular displacement; Cryogenics
Department/Centre:	Division of Physical & Mathematical Sciences > Centre for Cryogenic Technology
Date Deposited:	08 Feb 2019 12:25
Last Modified:	08 Feb 2019 12:25
URI:	http://eprints.iisc.ac.in/id/eprint/61370

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