我厂油罐区广大工人、干部和技术人员,经过无产阶级文化大革命的锻炼,进一步焕发了革命精神。同志们狠批“洋奴哲学”,大破爬行主义,自力更生,土法上马,在两个成品罐区实现了阀门遥控、油品调合、称重量油等自动化项目。由于需要进行遥控及遥测的对象越来越多,必须考虑信息传输方式的选择。一般地说,每个控制或测量对象可以单独用一个通道与控制室连接。但是,在罐区控制对象、测量对象及讯号对象数量大,分布广,并且与控制室距离远的情况下,如果采用直接拉线的方法,势必需要敷设大量 The vast numbers of workers, cadres and technicians in the tank farm area of ​​our factory have further rejuvenated the revolutionary spirit through the training of the Great Proletarian Cultural Revolution. Comrades denounced “Western slave philosophy,” breaking through repressiveism, relying on their own efforts, and launching indigenous methods. In these two finished product tank areas, automation projects such as valve remote control, blending of oil products, and weighing oil were implemented. Due to the need for remote control and telemetry more and more objects, we must consider the choice of information transmission methods. In general, each control or measuring object can be connected to the control room with a single channel. However, in the tank area control objects, the number of measurement objects and signal objects large, widely distributed, and the control room distance case, if the use of direct cable method, it is bound to laying a large amount