Abstract
Within the article the applicability of the Self-oscillating Acoustical System (SAS) in order to continuously monitor changes in strain was examined. The essence of SAS is to use a vibration exciter and vibration receiver placed in a distance, which is coupled by an amplifier operating in a positive feedback loop. Changing the speed of wave propagation, which is associated with the change of frequency in the system, can be measure of deformation of the material. The study confirmed the existence of the phenomenon of self-oscillating which can be used to assess the state of metal frame deformation.
About this article
Received
01 September 2011
Accepted
14 February 2012
Published
31 March 2012
Keywords
vibrations
autodyne
stress measurement
monitoring systems
Copyright © 2012 Vibroengineering
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