Laser ultrasonic weak defect signal detection based on Duffing oscillator

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Abstract

This paper addresses the challenge in traditional laser ultrasonic methods, where the detection of surface defects in metal materials is often hindered by noise, and a novel approach that combines laser ultrasonics with Duffing oscillators to achieve a high signal-to-noise ratio for weak defect signals on metal surfaces is proposed. By leveraging the sensitivity of the Duffing oscillator’s chaotic system to initial conditions and its noise immunity, we can accurately identify the location of weak defects. Simulation results confirm the effectiveness and stability of this method for detecting surface defects in metal sheets.

About the authors

Peng Hui

Jiujiang University

Email: 270401671@qq.com
China, Jiujiang, Jiangxi

Zeng Wei

Jiujiang University

Author for correspondence.
Email: 270401671@qq.com
China, Jiujiang, Jiangxi

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