An efficiency study of PVDF film transducers and their waveform modeling in cylindrical geometry
Thesis/Dissertation
·
OSTI ID:10110338
In this thesis, the efficiency formulas for a transducer working as a transmitter or a receiver was derived directively from the piezoelectric constitutive equation. The transducer efficiency in a pulse-echo measurement was also given by multiplying the efficiencies for the transmitter and the receiver. The comparison between the PVDF (polyvinylidene fluoride) film transducer and the conventional PZT ceramic transducers was made based on the efficiency formulas. Based on the impulse response approach, an analytical model was built to predict the pulse waveform for through-transmission and pulse-echo measurements when the film transducer was applied in geometry. The experiments were also made to observe echo waveforms in cylindrical rod samples. The same approach was also expanded to evaluate the echo waveforms from artificial flaws inside the cylindrical rod. The model prediction and the experimental results were in reasonably good agreement. 26 refs.
- Research Organization:
- Ames Lab., IA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-82
- OSTI ID:
- 10110338
- Report Number(s):
- IS-T--1611; ON: DE92005155
- Country of Publication:
- United States
- Language:
- English
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