Eddy current testing is a key technology among electromagnetic non-destructive testings at present and this situation was motivated by a stringent need to detect small cracks in tubing of a steam generator of nuclear power plants. In these five years the ECT technology has been enhanced very much, demonstrating that high performanced sensors for ECT are now ready to be applied to the annual inspection of steam generator tubing with use of arrayed micro sensors for ECT. In addition to the innovative technology, an inversion technique is being theoretically developed to make reconstruction of defects possible with use of data from the arrayed sensors. Rapid growth of interest in electromagnetic nondestructive evaluation have brought together experts from different parts of the world, as reflected in this work. The book is intended for engineers, researchers and practitioners working in the area of electromagnetism.
Author(s): Kojima F., Takagi T., Udpa S.S.
Year: 2002
Language: English
Pages: 302
Cover......Page 1
Title page......Page 2
Foreword......Page 6
List of Referees......Page 8
E'NDE – Kobe, Conference Organization......Page 9
E'NDE – Kobe, List of Participants......Page 11
Contents......Page 16
Inverse Problems......Page 20
Electromagnetic Interrogation Techniques for Damage Detection......Page 22
Shape Identification in Conductive Materials by Electrical Resistance Tomography......Page 32
A Numerical Method for Finding the Convex Hull of Inclusions Using the Enclosure......Page 40
A Direct Reconstruction of Magnetic Charge for Non-Destructive Testing......Page 48
Stability and Uniqueness in Determining a Current Source in Quasistatic Maxwell......Page 54
Direct Problems......Page 62
Adaptive Multigrid Techniques in Electromagnetic Field Computation......Page 64
Eddy-Current Evaluation of 3-D Defects in a Metal Plate: A First Analysis of a Contrast-Source Gradient Method......Page 71
Numerical Analysis of Ultrasonic Inspection Using Electromagnetic Acoustic Transducer......Page 79
Finite Element Model for Crack with Narrow Gap in ECT Problem......Page 87
Eddy Current Analysis by Integral Equation Method for ECT......Page 93
Eddy Current Testing......Page 100
Achievement of RFEC Effects in the Nuclear Fuel Rod Inspection by Using Shielded Encircling Coils......Page 102
Behavior of the Remote-Field on a Tube with Fan-Shaped Defect......Page 110
Inversion of ECT Signals from Flaws with Tip Variation in Steam Generator Tubes......Page 117
Development of Practical MFES System for Concrete Materials......Page 123
Evaluation of Crack Signals for a Superconductive Pulsed Eddy-Current Probe......Page 127
Time-Domain Finite Element Analysis of Remote Field ECT Excited by Pulse Current......Page 135
Materials Characterization......Page 144
NDE of Fatigue Damage in Austenitic Stainless Steel by Measuring and Inversion of Damage-Induced Magnetic Field......Page 146
Magnetic Nondestructive Evaluation of Ferromagnetic Steels due to Mechanical Loading......Page 154
Fatigue Evaluation of Magnetic Materials by Chaotic Attractor of Barkhausen Noise......Page 162
Measurements and Semi-Analytical Modeling of Incremental Permeability Using Eddy Current Coil in the Presence of Magnetic Hysteresis,......Page 169
Novel E'NDE Techniques......Page 178
Development of ECT Multi-Probe Detecting Axial and Circumferential Cracks Using Uniform Eddy Current Excitation Coils......Page 180
Evaluation of the New ECT Sensor Using JSAEM Round Robin Test Samples in Presence of Fasteners Interferences......Page 185
Non-destructive Testing by Using the Rotational Magnetic Flux Type Probe for SG Tubes......Page 193
Evaluation of Near-Surface Material Properties Using Planar Mesh Type Coils with Post-processing from Neural Network Model......Page 200
Nondestructive Detection of Inside Cracks and Delamination in Carbon-Fiber-Reinforced Plastics Using Superconducting Quantum Interference Device......Page 208
Change of Magnetic Properties due to Plastic Deformation in Ni[sub(50)]Cu[sub(50)] Alloy......Page 215
Optimization of Pipeline Inspection Tool Using Taguchi Method......Page 222
Profile Reconstruction of Conductive Cracks from Eddy Current Signals by means of a Neuro-Fuzzy System......Page 230
Inverse Analysis of Steam Generator Tube ECT Signals with Noise Sources Outside......Page 237
Crack Shape Identification of Steam Generator Tubes by Approximate Output Least Square Problems......Page 243
A Processing Method of Eddy-Current Testing Image Using Subband Technique without Phase Distortion......Page 249
An Approach for Identifying Current Distributions by Means of Magnetic Field Sensor with High Spatial Resolution......Page 256
Wavelet Basis Function Neural Network for Eddy Current Signal Characterization......Page 264
Magnetic Transition Due to Tensile Deformation in SUS 304 Stainless Steel......Page 272
The Potential of NDE by Magnetic Methods in SUS 304 Stainless Steel......Page 277
New Sensors......Page 286
Development of a Microwave Focusing Sensor for Nondestructive Evaluation of Materials......Page 288
Development of the Electromagnetic Micro Sensor and its Application to the Inspection of Cast Duplex Stainless Steel......Page 295
Signal Detection......Page 302
Generalized Vector Sampled Pattern Matching Method – Theory and Applications......Page 304
Crack Detection by a Small Loop Antenna......Page 312
X......Page 320
Z......Page 321
