It is difficult for the traditional pan-tilt-zoom(PTZ)system driven by electromagnetic motor to meet the growing demand for video surveillance system.The key challenge is high positioning accuracy,high dynamic perform...It is difficult for the traditional pan-tilt-zoom(PTZ)system driven by electromagnetic motor to meet the growing demand for video surveillance system.The key challenge is high positioning accuracy,high dynamic performance and miniaturization of the PTZ system.Here a PTZ system driven by two degree-of-freedom obeliskshaped ultrasonic motor with single stator is presented,and its intelligent control algorithm is studied.The structure and driving mechanism of the presented PTZ system are analyzed by both simulation and experiment.To solve the complex nonlinear factors,e.g.time-variation,dead zone,the fuzzy PID control algorithm and the variable gain cross-coupled control strategy are combined to improve the control performance.The results show that the proposed algorithm has faster response,higher precision than traditional control algorithm,and it also has a good robustness to prevent the effect of interference.展开更多
介绍了一种基于ARM和Windows CE嵌入式操作系统的多路远程视频监控系统。系统以Windows CE 5.0作为软件开发平台,以Intel公司生产的ARM芯片PXA270为硬件核心,采用罗技摄像头进行实时图像采集,经JPEG压缩算法进行编码压缩后,通过以太网...介绍了一种基于ARM和Windows CE嵌入式操作系统的多路远程视频监控系统。系统以Windows CE 5.0作为软件开发平台,以Intel公司生产的ARM芯片PXA270为硬件核心,采用罗技摄像头进行实时图像采集,经JPEG压缩算法进行编码压缩后,通过以太网发送到远程PC监控端,在PC监控端通过监控端软件可以实时观看远程服务器的视频图像,并实现了对摄像头云台的远程控制。展开更多
基金supported by the National Natural Science Foundation of China (No.51205193)the Research Fund for Doctoral Program of the Ministry of Education(No.20123218120037)
文摘It is difficult for the traditional pan-tilt-zoom(PTZ)system driven by electromagnetic motor to meet the growing demand for video surveillance system.The key challenge is high positioning accuracy,high dynamic performance and miniaturization of the PTZ system.Here a PTZ system driven by two degree-of-freedom obeliskshaped ultrasonic motor with single stator is presented,and its intelligent control algorithm is studied.The structure and driving mechanism of the presented PTZ system are analyzed by both simulation and experiment.To solve the complex nonlinear factors,e.g.time-variation,dead zone,the fuzzy PID control algorithm and the variable gain cross-coupled control strategy are combined to improve the control performance.The results show that the proposed algorithm has faster response,higher precision than traditional control algorithm,and it also has a good robustness to prevent the effect of interference.
文摘介绍了一种基于ARM和Windows CE嵌入式操作系统的多路远程视频监控系统。系统以Windows CE 5.0作为软件开发平台,以Intel公司生产的ARM芯片PXA270为硬件核心,采用罗技摄像头进行实时图像采集,经JPEG压缩算法进行编码压缩后,通过以太网发送到远程PC监控端,在PC监控端通过监控端软件可以实时观看远程服务器的视频图像,并实现了对摄像头云台的远程控制。
