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Theory of eddy current inspection of...

Uzal, Erol.

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Theory of eddy current inspection of layered metals.

Record Type:	Electronic resources : Monograph/item
Title/Author:	Theory of eddy current inspection of layered metals./
Author:	Uzal, Erol.
Description:	186 p.
Notes:	Source: Dissertation Abstracts International, Volume: 54-07, Section: B, page: 3781.
Contained By:	Dissertation Abstracts International54-07B.
Subject:	Engineering, Electronics and Electrical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9335046

Theory of eddy current inspection of layered metals.
Uzal, Erol.

Theory of eddy current inspection of layered metals. - 186 p.

Source: Dissertation Abstracts International, Volume: 54-07, Section: B, page: 3781.

Thesis (Ph.D.)--Iowa State University, 1992.

Some forward and inverse problems related to layer sizing in eddy current nondestructive evaluation (NDE) were examined and experimental tests were done. An air-core or ferrite-core eddy current probe coil above a half space is considered. The half space's conductivity changes only as a function of depth, but otherwise it is arbitrary. A numerical method for the computation of coil impedance based on the exact solution of Cheng, Dodd and Deeds (International Jour. of Nondestructive Testing, 3, 109-130,1971) is described. Also, for a specific conductivity profile involving the hyperbolic tangent function, the exact solution for the impedance is given. This exact solution was used in testing the convergence of the numerical method mentioned above. Experimental tests were done on model systems designed to imitate continuously changing conductivity profiles. An analytic solution is given that determines the electric and magnetic fields for a single turn coil that contains a ferrite core and that is placed above a conducting half-space. In the last two parts of the dissertation, we consider the determination of the half-space's conductivity profile from frequency dependent eddy current measurements. Experimental tests were done on single discrete layers and also on model systems designed to imitate continuously changing conductivity profiles.Subjects--Topical Terms:

626636
Engineering, Electronics and Electrical.

Theory of eddy current inspection of layered metals.
LDR:02201nmm 2200265 4500 001 1837840
005 20050506074603.5
008 130614s1992 eng d
035 $a (UnM)AAI9335046
035 $a AAI9335046
040 $a UnM $c UnM
100 1 $a Uzal, Erol. $3 1926270
245 1 0 $a Theory of eddy current inspection of layered metals.
300 $a 186 p.
500 $a Source: Dissertation Abstracts International, Volume: 54-07, Section: B, page: 3781.
500 $a Supervisor: Donald O. Thompson.
502 $a Thesis (Ph.D.)--Iowa State University, 1992.
520 $a Some forward and inverse problems related to layer sizing in eddy current nondestructive evaluation (NDE) were examined and experimental tests were done. An air-core or ferrite-core eddy current probe coil above a half space is considered. The half space's conductivity changes only as a function of depth, but otherwise it is arbitrary. A numerical method for the computation of coil impedance based on the exact solution of Cheng, Dodd and Deeds (International Jour. of Nondestructive Testing, 3, 109-130,1971) is described. Also, for a specific conductivity profile involving the hyperbolic tangent function, the exact solution for the impedance is given. This exact solution was used in testing the convergence of the numerical method mentioned above. Experimental tests were done on model systems designed to imitate continuously changing conductivity profiles. An analytic solution is given that determines the electric and magnetic fields for a single turn coil that contains a ferrite core and that is placed above a conducting half-space. In the last two parts of the dissertation, we consider the determination of the half-space's conductivity profile from frequency dependent eddy current measurements. Experimental tests were done on single discrete layers and also on model systems designed to imitate continuously changing conductivity profiles.
590 $a School code: 0097.
650 4 $a Engineering, Electronics and Electrical. $3 626636
650 4 $a Physics, Electricity and Magnetism. $3 1019535
690 $a 0544
690 $a 0607
710 2 0 $a Iowa State University. $3 1017855
773 0 $t Dissertation Abstracts International $g 54-07B.
790 1 0 $a Thompson, Donald O., $e advisor
790 $a 0097
791 $a Ph.D.
792 $a 1992
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9335046