CDATA[Analysis of the Liftoff Effect of Phase Spectra for Eddy Current Sensors

W Yin; R Binns; SJ Dickinson; Claire Davis; AJ Peyton

doi:10.1109/TIM.2007.908273

CDATA[Analysis of the Liftoff Effect of Phase Spectra for Eddy Current Sensors

W Yin, R Binns, SJ Dickinson, Claire Davis, AJ Peyton

Metallurgy and Materials

Research output: Contribution to journal › Article

52 Citations (Scopus)

Abstract

This paper presents an analytical model that describes the inductance change when a double air-cored coil sensor is placed next to a conducting plate. Analysis of the analytical model reveals that the phase signature of such a sensor is virtually liftoff independent. This finding is verified by numerical evaluations. This paper also finds that the phase signature of a ferrite U-cored sensor can be approximated by that of a double air-cored sensor of similar size and, therefore, possesses a similar liftoff-independent property. Measurements made with a sample U-cored sensor next to plates of nonmagnetic and magnetic materials verified the theoretical results.

Original language	English
Pages (from-to)	2775-2781
Number of pages	7
Journal	IEEE Transactions on Instrumentation and Measurement
Volume	56
Issue number	6
DOIs	https://doi.org/10.1109/TIM.2007.908273
Publication status	Published - 1 Dec 2007

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10.1109/TIM.2007.908273

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abstract = "This paper presents an analytical model that describes the inductance change when a double air-cored coil sensor is placed next to a conducting plate. Analysis of the analytical model reveals that the phase signature of such a sensor is virtually liftoff independent. This finding is verified by numerical evaluations. This paper also finds that the phase signature of a ferrite U-cored sensor can be approximated by that of a double air-cored sensor of similar size and, therefore, possesses a similar liftoff-independent property. Measurements made with a sample U-cored sensor next to plates of nonmagnetic and magnetic materials verified the theoretical results.",

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AU - Davis, Claire

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N2 - This paper presents an analytical model that describes the inductance change when a double air-cored coil sensor is placed next to a conducting plate. Analysis of the analytical model reveals that the phase signature of such a sensor is virtually liftoff independent. This finding is verified by numerical evaluations. This paper also finds that the phase signature of a ferrite U-cored sensor can be approximated by that of a double air-cored sensor of similar size and, therefore, possesses a similar liftoff-independent property. Measurements made with a sample U-cored sensor next to plates of nonmagnetic and magnetic materials verified the theoretical results.

AB - This paper presents an analytical model that describes the inductance change when a double air-cored coil sensor is placed next to a conducting plate. Analysis of the analytical model reveals that the phase signature of such a sensor is virtually liftoff independent. This finding is verified by numerical evaluations. This paper also finds that the phase signature of a ferrite U-cored sensor can be approximated by that of a double air-cored sensor of similar size and, therefore, possesses a similar liftoff-independent property. Measurements made with a sample U-cored sensor next to plates of nonmagnetic and magnetic materials verified the theoretical results.

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DO - 10.1109/TIM.2007.908273

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CDATA[Analysis of the Liftoff Effect of Phase Spectra for Eddy Current Sensors

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