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Proceedings Paper

Nano-displacement sensor of magnetostrictive TbDyFe material
Author(s): Yinxiang Li; Jiming An; Yiling Zhang; Qiang Li
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Paper Abstract

It has been proven that the saturation magnetostrictive constant (lambda) s of TbDyFe single crystal is 10-50 times larger than the coefficient of conventional magnetostrictive materials. In this paper bulk TbDyFe single crystal was prepared, completely without contamination, via Hukin's magnetic levitation cold crucible in Czochralski techniques. By adopting the TbDyFe single crystal as Magneto-sensing unit, a displacement sensor with high resolution was developed. Its structure and principle was described as follow: the sensor consists of measurement head, magnetostrictive driver and closed loop control system. The measurement head, with having giant resolution, ca determine the distance between the sample and the magnetostrictive driver in a suitable range. Whenthe sample shifts, the measurement head gives the closed control system a back signal that makes the magnetostrictive driver corresponding shift, leading to same and magnetostrictive driver in a suitable range. For the character of magnetostrictive driver being known, the shift can be measured via the control volume of magnetostrictive driver.

Paper Details

Date Published: 14 September 2001
PDF: 3 pages
Proc. SPIE 4414, International Conference on Sensor Technology (ISTC 2001), (14 September 2001); doi: 10.1117/12.440207
Show Author Affiliations
Yinxiang Li, Wuhan Univ. of Technology (China)
Jiming An, Wuhan Univ. of Technology (China)
Yiling Zhang, Wuhan Univ. of Technology (China)
Qiang Li, Wuhan Univ. of Technology (China)


Published in SPIE Proceedings Vol. 4414:
International Conference on Sensor Technology (ISTC 2001)

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