DataVXNondestructive Testing and EvaluationPaper
journal article·2023-11-02

An Acentric Archimedes Spiral Coil For Inspection of an Aluminium Plate with an Inhomogeneous Thickness

Zhichao Cai, Zhengshi Lu, Yibo Li, Yihu Sun, Qixiang Zhao

Nondestructive Testing and Evaluation· Volume 38· Issue 6
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Source abstract

Abstract

Electromagnetic acoustic resonance (EMAR) technology has potential to improve signal-to-noise ratio (SNR) and reduce noise effects in metal plate thickness measurement. However, using traditional EMAR to detect inhomogeneous-thickness specimens can result in difficulties accurately determining thickness and identifying interfaces due to multiple resonant frequencies. This paper proposes a signal processing method called frequency-frequency energy density separation (FFEDS) to obtain the energy density ratio (EDR) for different thicknesses using EMAR. A new coil structure, the Acentric Archimedes Spiral Coil (A-AS-Coil), and two scanning schemes (transverse and rotational) are designed. Experimentally, transverse scanning with the A-AS-Coil shows a nonlinear change in EDR, improving sensitivity in identifying interfaces. Rotational scanning with the A-AS-Coil increases the change in EDR by 106.2%, different from the conventional spiral coil.
Source: openalex_inverted_index · Quality: baseline

Research context

OpenAlex topics: Ultrasonics and Acoustic Wave Propagation · Non-Destructive Testing Techniques · Geophysical Methods and Applications

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

State Key Laboratory of Performance Monitoring Protecting of Rail Transit Infrastructure, East China Jiaotong University, Nanchang, China

School of Electrical and Automation Engineering, East China Jiaotong University, Nanchang, China

Key Laboratory of Nondestructive Testing, Fujian Polytechnic Normal University, Fuzhou, Fujian, China

School of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, China

Funding

National Natural Science Foundation of China · Natural Science Foundation of Jiangxi · Key Laboratory of Nondestructive Testing, Fuqing Branch of Fujian Normal University, Fujian Province University · State Key Laboratory of Reliability and Intelligence of Electrical Equipment, Hebei University of Technology

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