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Design and Analysis of a Dual-Slope Inductance-to-Digital Converter for Differential Reluctance Sensors.

Authors :
Philip, Noel
George, Boby
Source :
IEEE Transactions on Instrumentation & Measurement. May2014, Vol. 63 Issue 5, p1364-1371. 8p.
Publication Year :
2014

Abstract

A new, simple, and high accuracy dual slope inductance-to-digital converter (DSIDC) suitable for differential reluctance sensors is presented in this paper. Differential reluctance sensors have two inductors that vary in a push–pull manner with respect to measurand. In many such sensors, the relationship between inductance and measurand is nonlinear. It is known that a small linear range can be obtained by taking the difference between the values of the sensor inductances. The proposed DSIDC accepts the sensor inductances having nonlinear characteristics and provides a linear digital output directly proportional to the measurand [without employing a dedicated analog-to-digital converter (ADC)]. The output of the DSIDC is linear for the full range of the sensor. As the output is in digital form, it can be easily stored and processed in a digital system. The DSIDC is based on dual-slope ADC principle and possesses many advantages. The effect of various parameters on the performance of the DSIDC was analyzed, quantified, and presented in this paper. A prototype DSIDC has been built and tested with a differential variable reluctance based displacement transducer. Output from the DSIDC was linear for the full range of input. [ABSTRACT FROM PUBLISHER]

Details

Language :
English
ISSN :
00189456
Volume :
63
Issue :
5
Database :
Academic Search Index
Journal :
IEEE Transactions on Instrumentation & Measurement
Publication Type :
Academic Journal
Accession number :
95634912
Full Text :
https://doi.org/10.1109/TIM.2013.2296411