Research of Damage Imaging Algorithm in Plate Based on Signal Magnitude

Luo, Cong; Li, Peijiang; Zhu, Xiaojin; Deng, Fei

doi:10.1007/978-3-662-45283-7_33

Cited by 1 publication

(1 citation statement)

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“…1 is structural damage or defect. Any PZT could be chosen to load a series of excitation signals, so it can activate Lamb waves on the metal plate surface [11]. These Lamb waves spread around the center of actuator and reflected waves will be generated if there have damages in the propagation process.…”

Section: Principles Of Guided-wave Detecting and Defect Imagingmentioning

confidence: 99%

Lamb waves defects imaging research based on multi-parameter compensation and pixel optimization

Li¹,

Zhu²,

You³

et al. 2017

J. vibroeng.

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Ultrasonic guided waves detecting technology has promising application prospects in structural health monitoring. In order to detect defects in the aluminum sheet, a kind of defect localization imaging algorithm, combining multi-parameter compensation and pixel partitioning optimization is proposed in this paper. Based on the analysis of imaging principles, the waveform signal of time domain was mapped onto the wavenumber domain through a backward propagation compensation, so dispersion parameters can be compensated. Reference signal compensation can be achieved by the baseline signal differential method from wavenumber domain, which overcame influences of environmental changes. During the imaging process, a reasonable threshold was used for pixel partitioning and optimization to improve image quality. Experimental results demonstrated that positioning error about the algorithm is small, defects imaging of sheet is clear and intuitive, this optimization and compensation of guided-wave defects imaging can be used in structural health monitoring.

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Section: Principles Of Guided-wave Detecting and Defect Imagingmentioning

confidence: 99%