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

Sensors

Chien-Ching Ma¹  Yu-Hsi Huang² 

[1] Department of Mechanical Engineering, National Taiwan University, Taipei 106, Taiwan; E-Mail:;Graduate Institute of Applied Science and Technology, National Taiwan University of Science and Technology, Taipei 106, Taiwan; E-Mail:

关键词: PVDF film sensor;    strain gage;    cantilever beam;    transient response;    resonant frequency;   

DOI  :  10.3390/s120202088

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland