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Title: Electromagnetic fields in relation to eddy current gauging
Author: Heys, J. David
Awarding Body: University of Salford
Current Institution: University of Salford
Date of Award: 1984
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The work presented in this thesis describes some theoretical and experimental aspects of the relationships between electromagnetic fields and a non-contact type of eddy current gauge, which utilises a cylindrical solenoid and coaxially positioned metallic bar, either ferrous or non-ferrous. A rigorous mathematical analysis of the eddy current gauging system is presented, together with an evaluation of the solutions produced. This rigorous mathematical treatment is simplified, and the mathematical model thus produced is verified experimentally. The simplified mathematical model is used as a basis for a practical eddy current gauge operating at a frequency of 10 kHz, using ferrous or non-ferrous metal. A novel technique is then described in which the simplified mathematical model is used as part of a practical microprocessor-aided eddy current gauging system, which allows appropriate compensation to be introduced into the system for ferrous metallic conductors with magneticflaws present. This system uses a type of magnetic saturation technique.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Postdoctoral
EThOS ID:  DOI: Not available
Keywords: TK Electrical engineering. Electronics Nuclear engineering Electric measurements Electronic measurements