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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 Pa, achieving a high 1. 5-Pa pressure resolution. The measurement has a repeatability of 22% of the peak amplitude of the pressure waveform, due to creep. 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 1-D array of four sensors with a 15-mm center-to-center spacing is fabricated, and the dynamic response of the sensors is characterized and modeled. 2011-0333
Yaul et al. (Wed,) studied this question.