瑞利、横波和纵波速度成像扫描系统的开发

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027) Pub Date : 1999-10-17 DOI:10.1109/ULTSYM.1999.849470

S. Sathish, R. Martin

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引用次数: 2

摘要

研制了一种高精度扫描声显微镜系统，用于生成瑞利波、表面掠波纵波和表面掠波横波的c扫描型速度图像。声学显微镜利用脉冲激励在时域内将直接反射信号与表面声波信号分离。这些信号在两个散焦处到达时间的差异用于计算速度，并在扫描期间实时显示2D x/y速度。利用速度图像生成材料的杨氏模量图。给出了标准样品和Ti-6Al-4V合金的测量实例。

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Development of a scan system for Rayleigh, shear and longitudinal wave velocity mapping

A high precision scanning acoustic microscope system to generate C-scan type velocity images of Rayleigh, surface skimming longitudinal (SSLW) and surface skimming shear waves (SSSW), has been developed. The acoustic microscope utilizes impulse excitation to separate in the time domain the direct reflected signal from the surface acoustic wave signals. Differences in the arrival times of these signals at two defocuses are used to compute the velocity and display a 2D x/y velocity in real time during the scan. A map of the Young's modulus of the material is generated using the velocity images. Examples of measurement on standard samples and Ti-6Al-4V alloys are presented.

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来源期刊

1999 IEEE Ultrasonics Symposium. Proceedings. International Symposium (Cat. No.99CH37027)

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