scholarly journals Exploring high-frequency eddy-current testing for sub-aperture defect characterisation using parametric-manifold mapping

2021 ◽  
Vol 124 ◽  
pp. 102534
Author(s):  
Robert R. Hughes ◽  
Bruce W. Drinkwater
Keyword(s):  
Eddy Current ◽  
High Frequency ◽  
Eddy Current Testing ◽  
Current Testing ◽  
Manifold Mapping ◽  
Defect Characterisation

Research on Mechanical Design with Design and Implement of High-Frequency Excitation Signal Source in Eddy Current Testing

2013 ◽  
Vol 345 ◽  
pp. 128-131
Author(s):  
Wei Qin Zeng ◽  
Wei Min Zhang ◽  
Shu Hao Wang
Keyword(s):  
Eddy Current ◽  
High Frequency ◽  
Mechanical Design ◽  
Eddy Current Testing ◽  
Testing System ◽  
High Frequency Signal ◽  
Current Testing ◽  
High Frequency Excitation ◽  
The Stability ◽  
Generating Equipment

How to control the stability of the electrical and mechanical system is the most important content in the study of mechanical and electrical design. This paper studies the design and implement of high-frequency eddy current testing excitation source system. Design of a high-frequency signal generating equipment based on MCU, DDS technology and transistor power amplifier technology. The equipment can be used to generate a stable signal with the frequency below 10MHz. It has some characteristics included adjustable frequency, stable output of frequency and amplitude. It can greatly improve the accuracy and efficiency of detection of the eddy current testing system.

scholarly journals Conductive microbead array detection by high-frequency eddy-current testing technique with SV-GMR sensor

2005 ◽  
Vol 41 (10) ◽  
pp. 3622-3624 ◽  
Author(s):  
S. Yamada ◽  
K. Chomsuwan ◽  
T. Hagino ◽  
H. Tian ◽  
K. Minamide ◽  
...  
Keyword(s):  
Eddy Current ◽  
High Frequency ◽  
Eddy Current Testing ◽  
Testing Technique ◽  
Current Testing ◽  
Array Detection ◽  
Gmr Sensor ◽  
Microbead Array

Probabilistic evaluation of detection capability of eddy current testing to inspect pitting on a stainless steel clad using multiple signal features

2020 ◽  
Vol 64 (1-4) ◽  
pp. 47-55
Author(s):  
Takuma Tomizawa ◽  
Haicheng Song ◽  
Noritaka Yusa
Keyword(s):  
Stainless Steel ◽  
Eddy Current ◽  
Pressure Vessels ◽  
Eddy Current Testing ◽  
Probability Of Detection ◽  
Current Testing ◽  
Multiple Signal ◽  
Signal Features ◽  
Inner Surface ◽  
Drill Holes

This study proposes a probability of detection (POD) model to quantitatively evaluate the capability of eddy current testing to detect flaws on the inner surface of pressure vessels cladded by stainless steel and in the presence of high noise level. Welded plate samples with drill holes were prepared to simulate corrosion that typically appears on the inner surface of large-scale pressure vessels. The signals generated by the drill holes and the noise caused by the weld were examined using eddy current testing. A hit/miss-based POD model with multiple flaw parameters and multiple signal features was proposed to analyze the measured signals. It is shown that the proposed model is able to more reasonably characterize the detectability of eddy current signals compared to conventional models that consider a single signal feature.

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