Stress Distribution on the Fe Based Amorphous Toroidal Transducer Core

Mustafa Göktepe

doi:10.1155/2014/902156

Abstract

The basic principles of sensors are the transmission of energy from one system to another. In general, an electrical signal is produced by the change of a physical property induced by the applied change of a second parameter. In the case of magnetic transducers either the property or the parameter would have a magnetic context. For example, in magnetoelastic toroidal transducers, the induced changes of a physical property, that is, the variation of permeability caused by the applied external force are used to produce a variation in output signal. The linearity, magnitude, sensitivity, and repeatability of the relationship between the output signal of the transducer and the physical property define the quality of the transducer.

Highlights

Transducers are devices which convert physical energies into electrical signals or vice versa
When a displacement or force is applied to the transducer, a bending stress occurs within the amorphous toroidal core
The numerical calculation of stress in the toroidal transducer core was done to try and compare results with those attained through experimental work

Summary

Introduction

Transducers are devices which convert physical energies into electrical signals or vice versa. Magnetoelastic effects form the basis of a number of transducer and sensor designs for both specialised applications and for more general applications involving measurement of force and strain [1]. The magnetoelastic effect known as magnetostriction causes a magnetic material to distort when a magnetic field is applied. The iron rich metallic glasses have sizeable magnetostriction constants, and the coupling of magnetic and mechanical parameters can be enhanced by annealing the amorphous ribbon appropriately in an external magnetic field. The tension applied to a straight piece of amorphous ribbon can be detected inductively with the help of a small coil of wire wrapped around the strip. The differences in transducers using the inverse effect are the magnetisation conditions (dc, ac, or no applied field) and the material configurations (strip, toroid, or wire) [2]

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Conclusion