Publication Detail

A flexible underwater pressure sensor array using a conductive elastomer strain gauge

Frank M Yaul, Vladimir Bulovic, Jeffrey Lang
11 pp.
MITSG 12-11
$5.50 DOM / $7.50 INT

This paper presents a flexible pressure sensor array which is demonstrated to transduce underwater pressure variations produced by moving objects and surface waves. The sensors exhibit a 0.0014 fractional resistance change per 100 pascals, achieving a pressure resolution of 1.5 pascals using a 16-bit analog/digital converter. Additionally, sensor operation while bent to a 0.5 m radius of curvature is demonstrated. Each sensor consists of a strain-concentrating polydimethylsiloxane (PDMS) diaphragm and a resistive strain gauge made of a conductive carbon black-PDMS composite. A one-dimensional array of 4 sensors with a 15 mm center-to-center spacing is fabricated, and the dynamic response of the sensors is characterized and modeled.

type: Journal, book, proceeding reprints

Parent Project

Project No.: 2006-R/RT-2/RCM-17
Title: Touch-at-a-Distance: Pressure Microsensor Arrays for AUV Navigation