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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
, 2,*  and 2
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 PVDF film sensor; cantilever beam; cross-sensitivity; size effect; transient response
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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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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