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PRESSURE SENSING USING MAGNETOSTRICTIVE DELAY LINES

D. Bargiotas1,* , V. Karagiannis1, C. Manassis1

Affiliation

  1. Electrical Engineering Department, TEI of Chalkis, Psahna, Euboea 34400 Greece

Abstract

In this paper we present new results on pressure and pressure distribution sensors based on the magnetostrictive delay line technique. An amorphous ribbon is used as a magnetostrictive delay line, which is excited by a conductor, transmitting pulsed current orthogonal to the ribbon. The generated elastic pulse propagates along the length of the ribbon and is detected by means of a search coil at the end of it. Applying pressure on the surface of the ribbon between the excitation and the receiving area results in a distortion of the propagating elastic pulse and therefore a decrease of the output signal. We propose a device according to which such response is optimized. Pressure distribution is realized by applying pressure on the ribbon surface, which is out of the excitation and the receiving area. The sensor sensitivity is 100 ppm and the spatial resolution is of the order of 0.1 mm..

Keywords

Pressure sensors, Magnetostrictive delay lines, Amorphous ribbon, Pressure distribution.

Submitted at: April 26, 2004
Accepted at: June 10, 2004

Citation

D. Bargiotas, V. Karagiannis, C. Manassis, PRESSURE SENSING USING MAGNETOSTRICTIVE DELAY LINES, Journal of Optoelectronics and Advanced Materials Vol. 6, Iss. 2, pp. 685-688 (2004)