Surface profile reconstruction of complex cracks using the signals of rotating eddy current testing through the eddy current imaging method

Whether “Rich in Frequency” Means “Rich in Information” in Pulsed Eddy Current Testing to Evaluate Plate Thickness: Numerical Investigation

Frequency component mixing of pulsed or multi-frequency eddy current testing for nonferromagnetic plate thickness measurement using a multi-gene genetic programming algorithm

Bobbin pulsed eddy current array probe for detection and classification of defects in nonferromagnetic tubes

Investigation of the approximate decomposition of alternating current field measurement signals from crack colonies

Inspection of pitting corrosions on weld overlay cladding using uniform and rotating eddy current testing

Transformation of the rotating eddy current testing signal at the desired eddy current orientation

Investigation of rotating eddy current testing simulation using simplified model

To reduce the time of simulation for rotating Eddy current testing (RECT) technique, a simplified model without modeling probe was proposed previously. However, the applicability of the simplified simulation model was unknown. In this paper, the applicability of the simplified model for the RECT technique was investigated. The application condition of the simplified model was provided by comparing it with the results of the traditional simulation model. The simplified model was suitable for the study of cracks shorter than 70% size of the uniform Eddy current induced by the probe in a traditional model or experiment. The experiment was conducted to validate the simplified model. Moreover, using the simplified model, the effects of crack depth, orientation, and exciting frequency were studied. The deeper the crack depth was, the greater peak value of [Formula: see text] signal was. The crack angle was linear with the phase of signal. The exciting frequency affected the amplitude and phase of the signal at the same time.

Defect classification using postpeak value for pulsed eddy current technique

In this paper, a feature termed as the postpeak value is proposed for the pulsed eddy current technique (PECT). Moreover, a method using the postpeak value is proposed to classify surface and reverse defects. A PECT system is built for verification purposes. Experiment results prove that the postpeak feature value has better performance than that of the traditional peak value in the case of reverse defect detection. In contrast, the peak value is better than the postpeak value in the case of surface defect detection. Experiment results also validate that the proposed classification algorithm has advantages: classification can be achieved in real time, the calculation process and results are easy to understand, and supervised training is unnecessary.

Defect classification based on wavelet packet energy through pulsed alternating current field measurement technique

An electromagnetic helmholtz coil probe for arbitrary orientation crack detection on the surface of pipeline

Experimental and numerical investigation on buckling and post-buckling of a 3000m Subsea Separator

基于极限承载能力分析的超深水水下分离器承压结构壁厚设计方法

Investigation of optimal time-domain feature for non-surface defect detection through a pulsed alternating current field measurement technique

Multiple type defect detection in pipe by Helmholtz electromagnetic array probe

Analysis of signals for inclined crack detection through alternating current field measurement with a U-shaped probe

Uniform induced electromagnetic features around longitudinal and transverse cracks

New parameters for the ACFM inspection of different materials