基于DTMF的多路遥控切换射频传输定点监控系统  

Multi-channel Remote Control Switch RF Transmission Fixed-point Monitoring System Based on DTMF

作　　者：齐凤河[1] 王桂敏[1] 

机构地区：[1]大庆师范学院物理与电气信息工程系,黑龙江大庆163712

出　　处：《电视技术》2009年第7期90-92,共3页Video Engineering

摘　　要：针对目前监控系统采用的"先传输后切换"工作模式存在着传输距离近、传输线缆多、建造成本高、系统维护难等问题,设计了基于DTMF技术的多路遥控切换射频传输定点监控系统,利用DTMF技术远程控制视频切换电路,再用射频技术传输视频信号,采用"先切换后传输"的新型工作方式,使之具有监控点数多、传输距离远、布线简单、成本低廉、使用方便、维护容易等优点。At present, the mode of monitoring system working is ＂switch after the first transfer＂, which are issues of short transmission distance, muhi-cable transmission, high cost of construction and maintenance difficult. Thus, multi-channel remote control switch RF transmission fixed-point monitoring system based on DTMF technology is designed in this paper, which controls video switching circuits to use DTMF technology for remote. The mode of new working ＂transfer after the first switch＂ has many advan- tages, such as far instance, more monitoring points, transmission distance far, simple wiring, low cost and easy to use and mainte- nance, and so on.

关 键 词：自动化技术 监控系统 双音多频 射频传输 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置]