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一、问题的提出近年来,大型工业闭路电视监视系统的应用愈来愈广泛,其功能要求也日趋复杂繁多。从系统容量来说(指系统所含电视摄象机、监视器以及外围设备如电动云台、电动镜头、控温全天候护罩的个数),已从1位数、2位数发展到3位数、4位数;从控制功能来说,已从单级单功能的控制,发展到分级多功能的控制;从视频信息的传输处理来看,已从摄象点到控制监视点之间的单工纵向传输,发展成多控制点之间的双工纵横传输。因此,以往的工业闭路电视控制台(器)已远不能满足实际应用的需求。而仍以布线逻辑加开关按键的传统方法来重新设计,必然会使控制系统臃肿庞大,操作按键开关及指示器星罗棋布,造成制造调试和使用维护的不便。并且,随着系统控制容
First, the issue put forward In recent years, large-scale industrial CCTV surveillance system more and more widely used, its functional requirements are increasingly complex. From the system capacity (referring to the system includes TV cameras, monitors and peripherals such as electric head, electric lens, temperature control weather cover), has been from 1 digit, 2 digits to 3 The number of digits, 4-digit; from the control function, has been developed from single-stage single-function control to multi-level control; from the transmission of video information point of view, from the control point to the monitoring point Simplex vertical transmission, developed into multiple control points between the duplex transmission. Therefore, the conventional industrial CCTV console has been far from meeting the needs of practical applications. However, the traditional method of wiring logic plus switch keys is still required to be redesigned. This will inevitably make the control system bulky and bulky. The operation of key switches and pointers is extensively distributed, causing inconvenience in manufacturing and maintenance. And, with the system control capacity