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Transactions of the Institute of Measurement and Control
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Development of sensor arrays for electromagnetic inductive tomography: compensation of large background signal values

Z.Z. Yu

Engineering Department, Lancaster University, Lancaster LA1 4YR, UK

A.J. Peyton

Engineering Department, Lancaster University, Lancaster LA1 4YR, UK

A new electromagnetic inductance tomography (EMT) system has been developed with 16 excitation coils, 16 detection coils and a circular cross-section region of interest. This paper highlights one aspect of the sensor design, the compensation of the largest empty space signal. The system is capable of resolving a conductive or ferromagnetic object positioned in the centre with a diameter which is approximately 5% of that of the region of interest. This resolution is comparable to other electrical tomographic techniques. A description of the sensor array and a selection of sensitivity maps are also presented.

Key Words: Electromagnetic tomography • magnetic field • sensors

Transactions of the Institute of Measurement and Control, Vol. 20, No. 4, 195-202 (1998)
DOI: 10.1177/014233129802000405
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