滚动画布广告群的同步控制系统设计

The Design of Synchronized Control System for Rolling Canvas Advertisement Group

滚动画布是一种新型的广告发布形式 ,为了达到良好的宣传效果 ,用单台PLC控制 8台广告机上的 16幅滚动画布。在画布循环运行过程中 ,各个画布上同一序号的画面同时出现 ,展示一定的时间后再同时改换到下一序号的画面。PLC靠软件程序对 16幅画布的运动进行协调控制 ,克服了各个广告机的机械传动机构不一致性 ,保证画布动作整齐划一。PLC控制系统具有手动 /自动、定时开 /关。

Rolling canvas is a new type of advertisement . In order to reach a good propaganda effect, 16 rolling canvases on 8 advertisement machines are controlled by one Programmable Logic Controller(PLC). It is required that the canvases operate synchronistically. In their cyclic movements, canvas pictures with same order occur at the same time. After displaying for a while, they change to the next order pictures. It is under the coordination of PLC control software that canvases eliminate differences caused by machinery transmission mechanism and move in step.The control system provides manual/automatic operation modes and other functions such as periodical open/close,hold during power off and trouble diagnosis.