Signal Processing Technique to Study the Propagation Modes of Ultrasonic Waves in Wood Protected by Layers of Liquid Paint (Cement)

M. Tafkirte, A. Hamine
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Abstract

Several techniques based on ultrasound have been proposed for non-destructive evaluation (NDE). It has been widely applied in many fields such as medicine, mechanical, and construction, especially for the detection of cracks and flaws in structures and for the identification of material properties, which is capable of performing tasks to provide quick measurements while guaranteeing great accuracy. In this paper, we have developed the technique of ultrasonic transmission by water immersion as an alternative technique to study the propagation of ultrasonic waves in two structural materials: wood and wood protected by liquid paint (cement). Overall, the application of the transmission technique by change of the angle of incidence enables the demonstration of the experimental dispersion curves for the ultrasonic modes within the plates and allows the investigation and characterization of the function of the paint system (cement) in the wood plate.
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研究超声波在受液体油漆(水泥)层保护的木材中传播模式的信号处理技术
在无损评价(NDE)方面,已经提出了几种基于超声波的技术。它已被广泛应用于医学、机械和建筑等许多领域,特别是用于检测结构中的裂缝和缺陷以及鉴定材料特性,能够在保证高精度的同时完成快速测量任务。在本文中,我们开发了浸水超声波透射技术,作为研究超声波在两种结构材料(木材和受液体涂料(水泥)保护的木材)中传播的替代技术。总之,通过改变入射角度来应用透射技术,可以展示板材内超声波模式的实验频散曲线,并可以研究和描述木板中油漆系统(水泥)的功能。
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