Signal introduced to superposed eddy-current transducer by defect in the form of a coaxial hole in a cylinder with finite dimensions Soviet Journal of Nondestructive Testing, Vol. 25, No. 7, pp. 522–525 (Mar. 1990)

1990 ◽  
Vol 23 (6) ◽  
pp. 357
Author(s):  
V Raevskii
Keyword(s):  
Nondestructive Testing ◽  
Eddy Current ◽  
Current Transducer ◽  
Eddy Current Transducer ◽  
Coaxial Hole

scholarly journals Optimization of the eddy current transducer using COMSOL Multiphysics® and MATLAB® software

2018 ◽  
Vol 19 ◽  
pp. 01004 ◽  
Author(s):  
Konrad Dudziak ◽  
Krzysztof Stawicki ◽  
Andrzej Brykalski
Keyword(s):  
Nondestructive Testing ◽  
Eddy Current ◽  
Comsol Multiphysics ◽  
Excitation Coil ◽  
Current Transducer ◽  
Eddy Current Transducer

The article presents a method of optimizing the eddy current transducer. The transducer is made of three toroidal air cored coils: one excitation coil and two receiver coils. The transducer is used for eddy current nondestructive testing (NDT).

Noninvasive Electromagnetic Evaluation of Bjo¨rk-Shiley Heart Valves: Lifetime Prediction

2008 ◽  
Author(s):  
Raimond Grimberg ◽  
Adriana Savin ◽  
Shiu C. Chan ◽  
Rozina Steigmann ◽  
Lalita Udpa ◽  
...  
Keyword(s):  
Eddy Current ◽  
Heart Valves ◽  
Probability Of Detection ◽  
New Method ◽  
Lifetime Prediction ◽  
Prosthetic Heart Valves ◽  
In Vitro Experiments ◽  
Current Transducer ◽  
Eddy Current Transducer

Prosthetic heart valves of the Bjork-Shiley Convexo-Concave (BSCC) type have long been used extensively in implants; however, there have been reports of cases where one component of the valves failed, leading to the demise of the patient. This paper presents a new method for noninvasive electromagnetic evaluation for this type of valve, using an eddy current transducer with orthogonal coils. In vitro experiments have shown that discontinuities of outlet strut with depths equal or larger than 0.4mm can be detected with a probability of detection (POD) of 86.4%, and in the case of discontinuities with depth equal or larger than 0.6mm with POD of 97%.

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