Title :
A laser-optical strain gauge and its application in material testing
Author :
Zagar, Bernhard G. ; Schneider, Sebastian C.
Author_Institution :
Dept. of Meas. Technol., Johannes Kepler Univ., Linz, Austria
fDate :
6/24/1905 12:00:00 AM
Abstract :
In this paper we report on the theory and applicability of a laser speckle shift strain measurement system as well as some practical results obtained with the discussed system from fibers, foils and standardized specimen. Some of the results presented can not be obtained with other than optical means, because of the fragility and the small physical dimensions of the specimen.
Keywords :
measurement by laser beam; optical sensors; rough surfaces; speckle; strain gauges; strain measurement; cross power-spectral-density; cross-correlation; fibers; foils; laser-optical strain gauge; localized strain measurement; material testing application; rigid body motion; rough surface; speckle displacements; speckle shift strain measurement system; standardized specimen; superresolution image processing; Adaptive optics; Capacitive sensors; Laser theory; Materials testing; Optical interferometry; Optical scattering; Optical sensors; Rough surfaces; Speckle; Strain measurement;
Conference_Titel :
Instrumentation and Measurement Technology Conference, 2002. IMTC/2002. Proceedings of the 19th IEEE
Print_ISBN :
0-7803-7218-2
DOI :
10.1109/IMTC.2002.1006932
