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A PVDF transducer for low-frequency acceleration measurements
Brian L F Daku1, Enas M A Mohamed, Arnfinn F Prugger
1University of Saskatchewan, Department of Electrical Engineering, 57 Campus Drive, Saskatoon, SK, S7N 5A9, Canada. daku@engr.usask.ca
ISA Transactions
|July 27, 2004
Summary
A new, low-cost piezoelectric polyvinylidene fluoride (PVDF) acceleration transducer was developed for monitoring low-frequency vibrations. In-mine tests showed its performance closely matched a commercial geophone.
Area of Science:
- Geophysics
- Materials Science
Background:
- Low-frequency vibration monitoring is crucial in various industrial and geological settings.
- Existing sensors can be expensive or unsuitable for specific environments.
Purpose of the Study:
- To develop and validate a novel, low-cost acceleration transducer using piezoelectric polyvinylidene fluoride (PVDF).
- To assess the sensor's performance for low-frequency vibration monitoring in a real-world underground environment.
Main Methods:
- Development of a theoretical model for the PVDF acceleration transducer.
- Experimental validation of the theoretical model using laboratory tests.
- In-mine testing of the developed sensor alongside a commercial geophone over three months.
Main Results:
- The theoretical model accurately predicted the sensor's performance.
- Laboratory tests confirmed the sensor's viability.
- In-mine testing demonstrated a close correspondence between the PVDF transducer and the commercial geophone.
Conclusions:
- The developed piezoelectric PVDF transducer is a viable, low-cost option for low-frequency vibration monitoring.
- The sensor shows comparable performance to established geophones in underground mining conditions.
- This technology offers a robust and affordable solution for vibration sensing applications.