基于LabVIEW的远程视频监控系统设计与实现

Design and Realization of Video Monitoring System Based on LabVIEW

针对单独使用ARM或DSP处理器构建视频监控系统存在视频流畅性较低、实时性较差等问题,设计了一种基于双核处理器的可实现本地和远程控制的可变焦、多视角的视频监控系统.上位机使用LabVIEW设计,用于控制云台转动、镜头参数调节、视频信息播放和远程多机控制显示等功能;选用PELCOD云台专用通信协议和RS485总线,实现长距离、抗干扰性强的系统通信;下位机以TMS320DM6446为核心处理器,构建包含视频输入、数据存储、视频传输、云台控制等功能模块.通过实验,证明系统能稳定实现手动追踪功能,云台上下俯仰相对误差为4.4%,水平扇扫相对误差为5.5%;视频分辨率为720×480时,实时视频帧率达25f/s,具有良好的应用前景.

A variable-focus and multi-perspective video monitoring system was designed to realize the local and remote control,which is based on dual-core processor and aimed at the problem of the limits of video fluency and real time by using single core processor ARM or DSP.The upper computer is designed based on LabVIEW which can be used to realize many functions such as control pan-tilt rotation,the parameters of the lens adjustment,the information of video playback and remote multi-machine control display.To realize the communication between upper PC and lower computer,RS485 bus and PELCO-D PTZ dedicated communication protocol are used in communication system.The lower computer uses TMS320DM6446dual-core chips as the main control chip to build an embedded system.Video input,data storage,video transmission and PTZ control function modules are designed.Experimental results indicate that the system can be achieved manually tracking stability,the pitch angle relative error of4.4%,the sector scan angle relative error of 5.5%.When the video resolution is 720×480,the real-time video frame rate of 25 fps,and has good application prospect.