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    Volume 18, Issue 6 (November 1990)

    A Simplified Method for Determining Relaxation Time and Electrical Resistivity from Eddy-Current Decay Measurements

    (Received 10 October 1989; accepted 20 March 1990)

    Published Online: 01 November 1990

    CODEN: JTEVAB

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    Abstract

    A simple method of calculating the relaxation time (τ) from a direct-current eddy-current decay signal is developed. The solution for τ: τ=Δtln[V1V2V2V3] requires only that the three voltage (V)-time (t) sets be separated by equal time intervals (Δt), and be within the simple exponential region of the decay curve. The result is useful for electrical resistivity measurements taken by the eddy-current decay method.


    Author Information:

    Richards, GL
    Undergraduate Mechanical Engineering Student and Associate Professor of Mechanical Engineering, Texas A&M University, College Station, TX

    Hartwig, KT
    Undergraduate Mechanical Engineering Student and Associate Professor of Mechanical Engineering, Texas A&M University, College Station, TX


    Stock #: JTE12515J

    ISSN:0090-3973

    DOI: 10.1520/JTE12515J

    Author
    Title A Simplified Method for Determining Relaxation Time and Electrical Resistivity from Eddy-Current Decay Measurements
    Symposium ,
    Committee E28