ROTARY BLADE VIBRATION MEASUREMENT METHOD, TOOL FOR MEASURING ROTARY BLADE VIBRATION, AND ROTARY BLADE VIBRATION MEASUREMENT DEVICE

摘要

PROBLEM TO BE SOLVED: To provide a rotary blade vibration measurement method, a tool for measuring the rotary blade vibration, and a rotary blade vibration measurement device, capable of measuring the vibration of a rotary blade in a condition close to an actual phenomenon by reducing the influence of a turbo machine to an aerodynamic performance.SOLUTION: The rotary blade vibration measurement method includes: a light detection process of radiating light from a sensor unit 21 of an optical sensor 20 to an end surface 6d of a rotary blade 6b in the radial direction of a rotation axial line H, and detecting, with the sensor unit 21, the light reflected on the end surface 6d; and a vibration measurement process of measuring the vibration of the rotary blade 6b on the basis of the reflected light detected with the sensor unit 21. In the light detection process, the reflected light is detected while the optical axis L of the sensor unit 21 is inclined by a predetermined angle value θ with respect to the normal N direction of the end surface 6d.SELECTED DRAWING: Figure 1