Vol. 128, Issue 5, May 2011, pp.81-88

Study of a Modified Displacement Transducer of a Piston in a Power Cylinder

S. C. BERA and Madan BHOWMICK

Instrumentation Engineering,

Department of Applied Physics,

University of Calcutta,

92 A.P.C Road, Kolkata-700009, India

E-mail: scb152@indiatimes.com, msbhowmick776@rediffmail.com

Received: 23 November 2010   /Accepted: 20 May 2011   /Published: 28 May 2011

Abstract: The position monitoring of the piston inside a power cylinder is very important in process plant measurement and control. In the present paper a modified inductance type position sensing technique of a power cylinder piston has been described. A modified inductance measuring transducer circuit has been designed to measure the change of inductance of a very high inductance coil. The theoretical equations of the proposed inductive sensor and the displacement transducer have been derived. The transducer has been experimentally tested and the experimental data are presented in the paper.

Keywords: Power cylinder, Position transducer, Inductive pick-up. OP-AMP based differential inductance measurement

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