Scanning laser vibrometer for non-contact three dimensional displacement and strain measurements
Ben S. Cazzolato, Stuart Wildy, John Codrington, Andrei Kotousov (2008)Acoustics 2008, Geelong, Victoria, Australia, 24-26 November
The recent advent of three-dimensional scanning laser vibrometers has enabled extremely accurate non-contact measurement of the three-dimensional displacements of structures. This paper looks at the feasibility of using a scanning laser vibrometer for the non-contact measurement of strain field across the surface of a planar structure. Issues such as laser head alignment and choice of finite-difference scheme are discussed. Finally, experimental results of a test specimen are presented which clearly demonstrate the significant potential this new experimental technique has.
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