Measurements of Local Surface Wave Speeds by a Dual-Probe Laser Interferometer
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Begun in 1973, the Review of Progress in Quantitative Nondestructive Evaluation (QNDE) is the premier international NDE meeting designed to provide an interface between research and early engineering through the presentation of current ideas and results focused on facilitating a rapid transfer to engineering development.
This site provides free, public access to papers presented at the annual QNDE conference between 1983 and 1999, and abstracts for papers presented at the conference since 2001.
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Abstract
In a recent paper Huang and Achenbach [1] have reported the development of a dual-probe laser interferometer. In addition to the usual advantages of a laser interferometer such as no contact and point detection, the dual-probe interferometer measures the same signal at two points along its propagation path. Hence the instrument is particularly useful for the measurement of surface wave speed and attenuation. Such measurements provide valuable information on the near-surface material properties as well as the condition of the surface.