Title: Output characteristics of giant magnetostrictive force sensor under the effect of various factors

Authors: Zhen-Yuan Jia; Hui-Fang Liu; Fu-Ji Wang; Qi Li

Addresses: Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, No. 2, Linggong Road, Ganjingzi District, Dalian 116024, Liaoning Province, China. ' Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, No. 2, Linggong Road, Ganjingzi District, Dalian 116024, Liaoning Province, China. ' Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, No. 2, Linggong Road, Ganjingzi District, Dalian 116024, Liaoning Province, China. ' Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, School of Mechanical Engineering, Dalian University of Technology, No. 2, Linggong Road, Ganjingzi District, Dalian 116024, Liaoning Province, China

Abstract: In this paper, a novel giant magnetostrictive force sensor which uses a giant magnetostrictive materials rod as the sensitive element was studied. The sensor realised static force and dynamic force measuring through an integrated linear hall sensor and a pickup coil respectively. Based on a deep analysis of the relationship between magnetic flux density measured by hall sensor and actual magnetic flux density in giant magnetostrictive materials rod, combining the non-linear constitutive equations and electromagnetic induction law, the paper expounded the principle of simultaneously measuring static and dynamic force. Based on this, the influence laws of bias magnetic field, pre-tightening force, pickup coil turns, length of giant magnetostrictive materials rod, amplitude of exciting force and other factors on sensor's output characteristics are determined through experimental and theoretical analysis. The research results provide a technical way for further research of giant magnetostrictive force sensor.

Keywords: giant magnetostrictive materials rod; inverse magnetostrictive effect; force sensors; output characteristics; magnetic flux density; static force; dynamic force; nonlinear constitutive equations; electromagnetic induction law.

DOI: 10.1504/IJMA.2011.045248

International Journal of Mechatronics and Automation, 2011 Vol.1 No.3/4, pp.161 - 171

Available online: 01 Feb 2012 *

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