Rare earth extraction process control method based on video surveillance

In rare earth countercurrent extraction process, content of each component accumulates to different extent in the corresponding extraction tanks, and shows its own characteristic color. When the production process conditions changes, the distribution of content for each component will be changed, and the result is the movement of characteristic color. It integrates the image processing technology to identify characteristic color offset and fuzzy control. A rare earth extraction process control method composed of video monitoring and fuzzy controller is proposed. The technology is applied to a CePr/Nd extracting separation process. The results show the effectiveness of the control method.