基于图像反馈的回转筒物料运动状态实时控制系统  

Image-feedback Control System for the Solid Motion in Rotating Cylinders

作　　者：刘小燕[1,2] 鲁新月 张瑶瑶 

机构地区：[1]湖南大学电气与信息工程学院,长沙410082 [2]东北大学流程工业综合自动化国家重点实验室,沈阳110004

出　　处：《控制工程》2016年第3期313-317,共5页Control Engineering of China

基　　金：国家自然科学基金项目(61374149);教育部博士点基金项目(20130161110010);流程工业综合自动化国家重点实验室开放基金;湖南省自然科学基金项目(13JJA33)

摘　　要：回转窑是一种用于处理散状物料的重要热工装备,转筒内的物料运动状态对热传递效率具有重要影响。但是,物料运动状态的自动控制尚未见研究报导。提出了一种基于图像反馈的物料运动状态实时控制系统,由摄像头对转筒内物料的实时图像进行采集,测量出物料的重要特征量;在此基础上设计了一个外控制器,根据图像反馈的信息自动判断物料当前所处的运动状态并自动设定转筒的转速,通过与PI内控制器共同作用,调节转筒的转速,使物料处于期望的"滚落"状态。采用VC++编程实现了以上控制算法,并对所设计的实时控制系统进行了实验测试,验证了它的有效性。Rotary kiln is an important heat exchanger for the treatment of granular solids, and its efficiency of heat transfer depends to a great extend upon the state of the solids motion. However, research work on the automatic control of solids motion is relatively rare. In the present work, an image-feedback real-time control system is developed for the control of the solids motion, in which image sequences of the solids are captured and the feature variable is detected. Based on the feedback image information, an external controller is designed to judge the actual motion mode of the solids and to determine automatically the set-point of the rotation speed of the cylinder. Together with an internal PI controller, the cylinder speed is adjusted so that the motion mode of the solids is kept in the desired rolling mode. The above control algorithms are realized in the VC++ program and tested by experiments, in which the effectiveness of the control system is verified.

关 键 词：回转筒 物料状态 图像反馈 自动控制 休止角 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]