Automatic feature extraction method for crack detection in eddy current testing

Tao, Yang; Xu, Hanyang; Chen, Ziqi; Huang, Ruochen; Ran, Qiaoye; Zhao, Qian; Han, Yan; Zhang, Zhijie; Yin, Wuliang

doi:10.1109/i2mtc.2019.8827027

Cited by 3 publications

(4 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In practice, the system configuration, e.g., hardware and software implementation, differs from instrument to instrument and highly depends on each particular application. In general, the system contains an excitation source, which can be pulsed excitation signal [75], single frequency signal [28,76,77] and multi-frequency signal [78][79][80][81][82], etc. The hardware, data acquisition system (DAQ), normally includes analogue and digital conditioning electronics, which implement signal generation, signal amplification, demodulation and filtering.…”

Section: Algorithmmentioning

confidence: 99%

Eddy Current Measurement for Planar Structures

Xia

Huang

Chen

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

Eddy current (EC) testing has become one of the most common techniques for measuring metallic planar structures in various industrial scenarios such as infrastructures, automotive, manufacturing, and chemical engineering. There has been significant progress in measuring the geometry, electromagnetic properties, and defects of metallic planar structures based on electromagnetic principles. In this review, we summarize recent developments in EC computational models, systems, algorithms, and measurement approaches for planar structures. First, the computational models including analytical models, numerical methods, and plate property estimation algorithms are introduced. Subsequently, the impedance measurement system and probes are presented. In plate measurements, sensor signals are sensitive to probe lift-off, and various algorithms for reducing the lift-off effect are reviewed. These approaches can be used for measureing thickness and electromagnetic properties. Furthermore, defect detection for metallic plates is also discussed.

show abstract

Section: Algorithmmentioning

confidence: 99%

Eddy Current Measurement for Planar Structures

Xia

Huang

Chen

et al. 2022

Sensors

Self Cite

View full text Add to dashboard Cite

show abstract

“…The literature on the subject indicates that this method, one of the NDT techniques of the highest reliability and very high sensitivity, is used in the production control systems, among others in the foundry industry, where the dermatoscopic diagnosis of materials is particularly responsible where parts of the complicated shape are realised. Authors of papers [ 110 , 111 , 112 , 113 ] point out the significant number of advantages of the eddy current method, which include: high speed of testing and interpretation of results, the possibility of testing all metals, and additional non-contact testing (no need for a coupling agent between the probe and the tested surface). The ability to perform tests without removing the protective coatings of the product and the ability to perform the test through metallic coatings other than the native material of the product are also definite advantages [ 114 ].…”

Section: Modelmentioning

confidence: 99%

“…High-frequency transducers (of the order of several MHz) are used for surface layer testing. On the other hand, lower frequency transducers (of the order of several to several hundred kHz) should be used to detect discrepancies and structural changes at a certain depth from the surface [ 111 ].…”

Section: Modelmentioning

confidence: 99%

“…The protocol (report) from eddy current defectoscopy should include: a description of the product, a description of the inspection objective, an object of testing, acceptance requirements, a description of the testing method and technique, a description of the apparatus and settings of the apparatus, a description of the standards used for testing, evaluation of the test results (including drawings of the transducer signal trajectories, if any, for the detected discontinuities), the length of discontinuities, and, possibly, characteristics of discontinuities and an evaluation of the object quality following the requirements [ 111 ].…”

Section: Modelmentioning

confidence: 99%

See 1 more Smart Citation

Model of Diagnosing and Searching for Incompatibilities in Aluminium Castings

Pacana

Czerwińska

2021

Materials

View full text Add to dashboard Cite

An essential element of any industry is castings, which is determined by the technical conditions for their reception. However, conducting production in the foundry technology is burdened with many difficulties associated with, for example, the inability to control all of the parameters that may affect the casting quality. Therefore, it is essential to undertake improvement actions in this area. Efforts are being made to use non-destructive testing (NDT) as a part of quality control, but these methods are rarely combined in a single diagnostic run. As a part of quality improvement, it is also essential to identify the root cause of the problem. For this reason, it is justified to develop a model of diagnosing and searching for non-conformities, which would combine NDT tests and quality management tools. The model included the visual, ultrasound, and eddy current examination in the diagnostic part, and the Pareto–Lorenz diagram correlated with ABC method, histogram, and 5WHY method (asking five questions why). The study’s originality is manifested in the combination of several NDT methods with quality management methods in one model. Using integrally configured methods in the proposed model, it was possible to: reduce diagnostic uncertainty, characterize the critical group of non-conformities, and identify the root causes of the quality problem. The model is a new and universal method that can be implied in any foundry company in order to ensure the stability of the production processes. The application of the model contributes to an increase in the detection speed and enables the reduction of non-conformities in aluminium castings, thus increasing the quality level of the offered products.

show abstract