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Proceedings Paper

An ultrahigh sensitive self-powered current sensor utilizing a piezoelectric connected-in-series approach
Author(s): Po-Chen Yeh; Tien-Kan Chung; Cheng-Huang Lai
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Paper Abstract

In this paper, we demonstrate a self-powered AC-current sensor using a piezoelectric connected-in-series approach to increase the sensitivity. The sensor consists of a CuBe-beam, piezoelectric-PZT-sheet, NdFeB hard-magnet, and mechanical-frame. When the sensor is placed in an alternative magnetic-field induced by an alternative current-carrying wire, the magnet fixed on the beam is subjected to an alternative magnetic-force produced by the magnetic-field. Therefore, the beam is oscillated. Consequently, the piezoelectric-sheet fixed on the beam is periodically deformed and continuously produces voltage-response. When beams are connected in-series, the total voltage-response is significantly enlarged while the background-noise remains the same. The experimental result shows the sensitivity of the sensor consisting 8 beams connected in-series under the magnetic-field generated by a wire of 8-Ampere from a breaker is enlarged from 130 mV/A to 640 mV/A.

Paper Details

Date Published: 8 March 2014
PDF: 6 pages
Proc. SPIE 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014, 90620K (8 March 2014); doi: 10.1117/12.2045304
Show Author Affiliations
Po-Chen Yeh, National Chiao Tung Univ. (Taiwan)
Tien-Kan Chung, National Chiao Tung Univ. (Taiwan)
Cheng-Huang Lai, National Chiao Tung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 9062:
Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014
Wolfgang Ecke; Kara J. Peters; Norbert G. Meyendorf; Theodoros E. Matikas, Editor(s)

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