モアレトポグラフィを用いた大振幅を伴う振動現象の変位測定

概要

論文の詳細を見る
The vibration analysis using a holographic interferometer is a very useful method for analyzing the dynamic characteristics of machine elements. However, there is a limitation that the method can not measure large deformation. On the other hand, the method based on the moire topography have been proposed for solving this problem. However, there are also some problems peculiar to optical measurements. Because the moire method is based on the shape measurement, the displacement of an object can not be directly measured. We should grasp the trajectories of movement of the measuring points in the case of measuring displacement of the vibrating object with large amplitude. In this paper, a system which can measure the displacement of the vibrating object with large amplitude is proposed using the inverse-transformation for the central projection and estimating the trajectories. The experiment results show that this method is useful for the measurement of the object's displacement by the vibration with large amplitude.
1999-07-25