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Open AccessArticle

Investigation of the Transient Behavior of a Cantilever Beam Using PVDF Sensors

1
Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan
2
Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan
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Author to whom correspondence should be addressed.
Sensors 2012, 12(2), 2088-2117; https://doi.org/10.3390/s120202088
Received: 13 December 2011 / Revised: 6 February 2012 / Accepted: 8 February 2012 / Published: 14 February 2012
(This article belongs to the Section Physical Sensors)
In this paper, a PVDF film sensor was used to measure the transient responses of a cantilever beam subjected to an impact loading. The measurement capability of a PVDF sensor is affected by the area of the PVDF film sensor and the signal conditioner (charge amplifier). The influences of these effects on the experimental measurements were investigated. The transient responses for the dynamic strain of the beam were measured simultaneously by the PVDF sensor and a conventional strain gauge. The resonant frequencies of the beam were determined by applying the Fast Fourier Transform on transient results in the time domain of the PVDF sensor and the strain gauge. The experimentally measured resonant frequencies from the PVDF sensor and the strain gauge were compared with those predicted from theoretical and FEM numerical calculations. Based on the comparison of the results measured for these two sensors, the PVDF film sensor proved capable of measuring transient responses for dynamic strain, and its sensitivity is better than that of the strain gauge. Furthermore, almost all the resonant frequencies can be obtained from the results of transient responses for PVDF film. View Full-Text
Keywords: PVDF film sensor; strain gage; cantilever beam; transient response; resonant frequency PVDF film sensor; strain gage; cantilever beam; transient response; resonant frequency
MDPI and ACS Style

Ma, C.-C.; Huang, Y.-H.; Pan, S.-Y. Investigation of the Transient Behavior of a Cantilever Beam Using PVDF Sensors. Sensors 2012, 12, 2088-2117.

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