关键词: 微振动测量, 便携式仪器, 视频放大, 盲源分离

Abstract: Aiming at the undetectable micro-vibration，the large amount sensors and difficult arrangement in the contact vibration measurement，and inefficiency and costliness of optical vibration measurement，a vision-based portable micro-vibration visualization measuring instrument is designed.A gray-scale average measurement algorithm based on blind source separation is proposed to extract vibration signals，and the video amplification algorithm is used to make the micro-vibration visualization.Furthermore，the measurement system is integrated into a portable instrument based on an embedded development platform.The testing results，which provides positive visualization and accurate measurement，are presented to validate the effectiveness of this proposed method，which can be provided to solve the problems existing in the vibration measurement.

Key words: Micro-vibration measurement, Portable instrument, Video amplification, Blind source separation