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Proceedings Paper

Piezoelectric sensor characteristics of electro-active paper
Author(s): Ho Cheol Lee; Heung Soo Kim; Gyu Young Yun; Jaehwan Kim
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Paper Abstract

The possibility as a vibration sensor of Electro-Active paper (EAPap) based on piezoelectricity was investigated in the present paper. The EAPap was fabricated by regenerating and tape casting cellulose. The sample was coated by thin laminating film for packaging. The capacitance of EAPap was measured and compared with commercial PVDF. Relative permittivity of EAPap was 12, which was same as commercially available PVDF. This reveals that EAPap has similar sensing potential of synthetic piezo polymer film. The simple aluminum cantilevered beam was used for the vibration testing and EAPap was attached on the beam. The original EAPap sensor without grounding and shielding has greatly affected by the surrounding noise such as power noise especially. The power noise reduced dramatically with grounding and shielding of EAPap. The impulsive response of EAPap provided correct dynamic characteristics of the beam. Especially, twisting mode of the beam was clearly observed even though the EAPap was attached at the center of the beam. This is because the sensing capability of EAPap is based on piezoelectricity which is bidirectional strain characteristics. EAPap sensor based on piezoelectricity provided a great potential as a vibration sensor.

Paper Details

Date Published: 31 March 2009
PDF: 9 pages
Proc. SPIE 7291, Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2009, 72910V (31 March 2009); doi: 10.1117/12.815181
Show Author Affiliations
Ho Cheol Lee, Catholic Univ. of Daegu (Korea, Republic of)
Heung Soo Kim, Catholic Univ. of Daegu (Korea, Republic of)
Gyu Young Yun, Inha Univ. (Korea, Republic of)
Jaehwan Kim, Inha Univ. (Korea, Republic of)

Published in SPIE Proceedings Vol. 7291:
Nanosensors, Biosensors, and Info-Tech Sensors and Systems 2009
Vijay K. Varadan, Editor(s)

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