Investigations of the Dynamic Sensing Ability of PVDF Sensor on Structures
Date Issued
2011
Date
2011
Author(s)
Liou, Hong-Cin
Abstract
In this thesis, the dynamic sensing characteristics of PVDF film sensor are investigated in many perspectives. First, we compare the sensing results of different PVDF film sizes on a cantilever beam, which showing that the PVDF sensor with size of 5mm × 2.5mm has the best sensing performence. Second, we compare the experiment signals derived by PVDF sensor and the simulation signals of a cantilever plate, where the simulations are evaluated by finite element method software “Abaqus”. The comparing results indicate that the signals from experiments and simulations are highly consistent with each other. At last, we detect and analyze the dynamic responses of a thick plate with fully free boundary condition. The results show that PVDF film sensor has excellent performance in dynamic sensing. Not only can PVDF sensor distinguish the resonant frequencies of a great amount of vibration modes, it can also detect the mode energy correctly, which is proven by comparing the frequency spectrums and the mode shape plots. The strain gage is also applied as a sensing standard to understand the sensing properties of PVDF film sensor, in the reason that strain gage is one of the most convenient and wildly-used sensor to detect the dynamic responses of structures. Our research shows that PVDF film sensor has better dynamic sensing ability than strain gage.
Subjects
PVDF film sensor
Dynamic sensing
Type
thesis
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