Research

In this study, we develop a vision system which enabled the multiplex frequency measurement using a DMD (Digital Micro-mirror Device), and we are aimed at realizing the realtime vibration distribution imaging.

In the proposed method, only the frequency to appoint of targets vibrating fast is extracted and it is made visible. When the DMD arranged in the front of an imager is controlled in f[Hz], only the targets including the frequency is filtered. Therefore, by generating a differential image with the original image, only vibration of the specific frequency is made visible. In this study, we succeeded in making plural different frequency visible by changing control frequency of the DMD spatially and temporally.

We performed vibration imaging experiments using vibration sources (speakers). We confirmed that the vibration phenomenon including plural frequency is made visible definitely.