Sensors 2012, 12(12), 16641-16659; doi:10.3390/s121216641
Article

Experimental Investigation of the Cross-Sensitivity and Size Effects of Polyvinylidene Fluoride Film Sensors on Modal Testing

1 School of Aeronautics and Astronautics, Institute of Applied Mechanics, Zhejiang University, Hangzhou 310027, China 2 Department of Mechanical Engineering, National Taiwan University, Taipei 10617, Taiwan
* Author to whom correspondence should be addressed.
Received: 9 October 2012; in revised form: 7 November 2012 / Accepted: 27 November 2012 / Published: 4 December 2012
(This article belongs to the Special Issue Piezoelectric Sensors and Actuators)
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Abstract: Due to advantages such as light weight, flexibility, and low cost, polyvinylidene fluoride (PVDF) films have been widely used in engineering applications as sensors for detecting strain, pressure, or micro-force. However, it is known that PVDF strain sensors have strain cross-sensitivity in mutually orthogonal directions. Furthermore, the size of the PVDF film sensor would also affect the dynamic strain sensing performance. In this paper, to investigate the cross-sensitivity and size effects experimentally, we employ PVDF film sensors to perform dynamic measurements on a cantilever beam. Since the vibrations of the cantilever beam are excited by impacts of a steel ball, the induced highly repeatable transient responses contain a wide range of resonant frequencies and thus can be used to investigate both the size and cross-sensitivity effects of the PVDF film sensors in a dynamic sensing environment. Based on the experimental results of the identified resonant frequencies compared with results obtained from a strain gauge, finite element calculations, and theoretical predictions, suggestions for the use of the PVDF strain sensor in modal testing are given in this paper.
Keywords: PVDF film sensor; cantilever beam; cross-sensitivity; size effect; transient response

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MDPI and ACS Style

Chuang, K.-C.; Ma, C.-C.; Liou, H.-C. Experimental Investigation of the Cross-Sensitivity and Size Effects of Polyvinylidene Fluoride Film Sensors on Modal Testing. Sensors 2012, 12, 16641-16659.

AMA Style

Chuang K-C, Ma C-C, Liou H-C. Experimental Investigation of the Cross-Sensitivity and Size Effects of Polyvinylidene Fluoride Film Sensors on Modal Testing. Sensors. 2012; 12(12):16641-16659.

Chicago/Turabian Style

Chuang, Kuo-Chih; Ma, Chien-Ching; Liou, Hong-Cin. 2012. "Experimental Investigation of the Cross-Sensitivity and Size Effects of Polyvinylidene Fluoride Film Sensors on Modal Testing." Sensors 12, no. 12: 16641-16659.

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