New high-sensitivity hybrid magnetostrictive/electroactive magnetic field sensors

Jiankang Huang; Robert C. O'Handley; David Bono

doi:10.1117/12.484257

22 July 2003 New high-sensitivity hybrid magnetostrictive/electroactive magnetic field sensors

Jiankang Huang, Robert C. O'Handley, David Bono

Proceedings Volume 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems; (2003) https://doi.org/10.1117/12.484257
Event: Smart Structures and Materials, 2003, San Diego, California, United States

Abstract

A recently developed class of magnetic field sensors is based on the action of a magnetostrictive material on a piezoelectric material. Described here is a significant improvement on this class, a passive magnetic field sensor made of layers of Terfenol-D {Fe₂(Dy_0.7Tb_0.3)} magnetostrictive material and ceramic PZT-5. These devices show a large magnetic field sensitivity of order 6 kV/T. Application of this device to harvesting vibration energy indicates that more than 10 mW of electrical power can be harvested using a Terfenol-D/PZT/ Terfenol-D sandwich (volume = 1 cm³) from 30 Hz vibrations having an acceleration of 0.5 g.

Citation Download Citation

Jiankang Huang, Robert C. O'Handley, and David Bono "New high-sensitivity hybrid magnetostrictive/electroactive magnetic field sensors", Proc. SPIE 5050, Smart Structures and Materials 2003: Smart Sensor Technology and Measurement Systems, (22 July 2003); https://doi.org/10.1117/12.484257

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