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  • 1
    Electronic Resource
    Electronic Resource
    Steam Tube Defect Characterization Using Eddy Current Z -Parameters (1998)
    Springer
    Research in nondestructive evaluation 10 (1998), S. 227-252 
    Details
    ISSN: 1432-2110
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract. Steam generator tubing inspections use the impedance of a differential eddy current probe inside a tube as an indication of incipient failure. An axisymmetric finite-element computer code has been developed and utilized to calculate the impedances of the differential probe. The calculated values have been validated by comparison with experimental results. A Z -parameter model for a probe inside a steam tube utilizing differential coils is described, and the response of Z -parameters for the differential probe under various changes in the steam tube configuration is investigated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/PL00003909
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    A normalization scheme for comparing eddy current differential probe signals using a finite element formulation (1991)
    Springer
    Research in nondestructive evaluation 3 (1991), S. 221-234 
    Details
    ISSN: 1432-2110
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A first-order finite element formulation is used to model an eddy current differential bobbin coil probe scanning a tube with axisymmetric flaws. A multifrequency signal normalization scheme is developed to allow direct comparison between experimental measurements of the differential bobbin coil probe signal and finite element calculations of the probe coil impedance. Results demonstrate that both magnitude and phase of the differential bobbin coil impedance are useful in characterizing flaws in tubing for multifrequency scans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606658
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Some computational considerations in eddy-current NDE (1984)
    Springer
    Journal of nondestructive evaluation 4 (1984), S. 39-42 
    Details
    ISSN: 1573-4862
    Keywords: Eddy current ; computer analysis ; numerical methods ; NDE
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology , Mathematics
    Notes: Abstract Theoretical calculations of eddy-current phenomena often involve the numerical evaluation of various integral expressions. A discussion of some of the possible evaluation methods and of the factors to be considered in choosing a method is presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00711099
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    Paper (German National Licenses)
    Fulltext
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