Design and fabrication of dielectric diaphragm pressure sensors for applications to shock wave measurement in air

W. Parkes, V. Djakov, J. S. Barton, S. Watson, W. N. MacPherson, J. T M Stevenson, C. C. Dunare

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

Optical fibre pressure sensors have potential performance advantages over electrical sensors in measuring rapid transients such as shock waves from explosive blasts. We report the development of micromachined optical fibre Fabry-Pérot pressure sensors using a silicon dioxide or nitride diaphragm and detail the fabrication stages of the sensor body and diaphragm. The planar technology used is based on silicon deep etching and direct fusion bonding of silicon wafers. Test results for both types of diaphragm are presented. Sensors with rise times better than 3 ?s, range 0.1 to 1 MPa and resolution ~500 Pa have been demonstrated in explosives trials. Despite the difference in the sign of stress for the two diaphragm types, both demonstrated excellent high-speed response to explosively generated air shocks. © 2007 IOP Publishing Ltd.

Original languageEnglish
Article number016
Pages (from-to)1334-1342
Number of pages9
JournalJournal of Micromechanics and Microengineering
Volume17
Issue number7
DOIs
Publication statusPublished - 1 Jul 2007

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