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Vol. 148, No. 1, January 2013, pp. 1-10

 

Bullet

 

Low Value Capacitance Measurements for Capacitive Sensors A Review
 

1 Prabhu RAMANATHAN, 1 Sudha RAMASAMY, 1 Prateek JAIN, 1 Hardik NAGRECHA, 1 Saurav PAUL, 2 P. Arulmozhivarman, 3 Rao TATAVARTI

1 School of Electrical Engineering, VIT University, Vellore, India 632014.

Tel.: +91-9578409525,

2 School of Electronics Engineering, VIT University, Vellore, India 632014

3 Gayatri VidyaParishad College of Engineering, Visakhapatnam, India - 530 048

E-mail: ishupa@gmail.com

 

Received: 26 July 2012   /Accepted: 24 January 2013   /Published: 31 January 2013

Digital Sensors and Sensor Sysstems

 

Abstract: The novel results in the field of measurements of very small capacitance changes are presented. The operating principles like double differential principle, RC phase delay, charging and discharging, oscillator, capacitance to phase angle conversion used for measuring very small capacitance changes are discussed. The basic and most important parameters of measurements are dealt with measurement range, sensitivity, percentage error and applications where it can be used. The aim is to provide an elaborative summary on various methods and their parameters available for capacitance measurement.

 

Keywords: Capacitance measurement, Capacitive sensors, Doubles differential principle, RC phase delay and oscillator

 

 

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