Abstract
In new measurement technique to propose, displacement by bending vibration of piping which vibrates using multiple laser displacement sensors is measured, and vibrational stress is obtained by calculating the strain produced from those displacement differences for piping. This measuring instrument is a non-contact system, and a miniaturization and short-time measurement of equipment are easy. This paper deals with the concept of the vibrational stress measurement technique, the theory of the measuring method, and the procedure using three sets of the laser displacement sensors. Furthermore, using a cantilever model, vibration experiments are conducted, displacements and strain are measured. Next, the comparison with the stress by using the displacement of experiment based on this technique and the stress from the strain of experiment is performed.
