Journal of the Korean Institute of Electrical and Electronic Material Engineers (한국전기전자재료학회논문지)
- Volume 13 Issue 9
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- Pages.786-790
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- 2000
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- 1226-7945(pISSN)
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- 2288-3258(eISSN)
Study on the Piezoelectric Direct Effect of PVDF Film
PVDF 필름의 압전정효과에 관한 연구
Abstract
This paper is concerned on the theoretical and experimental approaches of direct piezoelectric effect in the PVDF film. When a cantilever structure of PVDF film is bended by the external force, electric charges are concentrated on the electrode surface of the film due to the direct piezoelectric effect, and output voltage is induced from the terminals of the film. In this paper, a symbolic equation between the external force and the output voltage was introduced. Moreover, the theoretical output voltages were compared with the experimental results by falling balls, which were agreed well each other. This results can be useful in a warning system of abnormal pulse rate and breathing, and in detecting impact force and/or mechanical energy using bending of PVDF film.