An ultrahigh sensitive self-powered current sensor utilizing a piezoelectric connected-in-series approach

Po-Chen Yeh; Tien-Kan Chung; Cheng-Huang Lai

doi:10.1117/12.2045304

8 March 2014 An ultrahigh sensitive self-powered current sensor utilizing a piezoelectric connected-in-series approach

Po-Chen Yeh, Tien-Kan Chung, Cheng-Huang Lai

Proceedings Volume 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014; 90620K (2014) https://doi.org/10.1117/12.2045304
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

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.

Citation Download Citation

Po-Chen Yeh, Tien-Kan Chung, and Cheng-Huang Lai "An ultrahigh sensitive self-powered current sensor utilizing a piezoelectric connected-in-series approach", Proc. SPIE 9062, Smart Sensor Phenomena, Technology, Networks, and Systems Integration 2014, 90620K (8 March 2014); https://doi.org/10.1117/12.2045304

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