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Dynamic characterization of piezoelectric paint sensors under biaxial strain

Lookup NU author(s): Dr Ismael Payo, Dr Jack Hale

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Abstract

A piezoelectric paint film has been designed to be used as a strain sensor. The composite is a suspension of milled lead zirconate titanate (PZT) ceramic powder in a polymer binder (water-based acrylic). The sensitivity of the sensor was estimated as the electric displacement (electric charge per electrode area) generated by the sensor relative to the strain experienced by the substrate surface, under the hypothesis that the electric charge generated is proportional to the sum of the principal strains. The piezoelectric constant d(31) (conventionally used to characterize piezoelectric sensor materials for structural vibration measurement) has also been obtained. The sensor linearity has been demonstrated over a strain range of +/- 200 mu epsilon and the sensor sensitivity is shown to be flat to within +/- 2 dB over a frequency range of 5-500 Hz, ranges typically required for structural vibration monitoring applications. (C) 2010 Elsevier B.V. All rights reserved.

Publication metadata

Author(s): Payo I, Hale JM

Publication type: Article

Publication status: Published

Journal: Sensors and Actuators A: Physical

Year: 2010

Volume: 163

Issue: 1

Pages: 150-158

Print publication date: 01/09/2010

ISSN (print): 0924-4247

ISSN (electronic): 1873-3069

Publisher: Elsevier

URL: http://dx.doi.org/10.1016/j.sna.2010.08.005

DOI: 10.1016/j.sna.2010.08.005

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