The research of inhomogeneity in eddy current sensors

This paper reports the principle of displacement eddy current sensors and highlights the advantages compared with other non-contact sensors. Key factors that influence the sensor accuracy are presented. An experimental study has been undertaken into the effects of different target metals measured by...

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Bibliographic Details
Published in:Sensors and actuators. A. Physical. 1998-08, Vol.69 (2), p.148-151
Main Authors: Tian, G.Y., Zhao, Z.X., Baines, R.W.
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Eddy current sensor
Exact sciences and technology
General equipment and techniques
Inhomogeneity (electrical run out)
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Materials science
Materials testing
Non-contact measurement
Nondestructive testing: electromagnetic testing, eddy-current testing
Physics
Sensors (chemical, optical, electrical, movement, gas, etc.)
remote sensing
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Description
Summary:This paper reports the principle of displacement eddy current sensors and highlights the advantages compared with other non-contact sensors. Key factors that influence the sensor accuracy are presented. An experimental study has been undertaken into the effects of different target metals measured by the sensors. Based on a theoretical analysis, the methods to overcome the inhomogeneity (electrical run out) of eddy current sensors are discussed. Some initial results are presented to demonstrate the efficiency of the methods.
ISSN:0924-4247
1873-3069
DOI:10.1016/S0924-4247(98)00085-5