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在毛主席关于“独立自主、自力更生”、“备战、备荒、为人民”的伟大方针指引下,我国工业自动化技术水平迅速提高,电子计算机已在工业自动控制方面得到了应用。在无产阶级文化大革命中,我厂先后于1968年和1970年成功地使用了直接数字控制仪对减压蒸馏和常减压蒸馏生产过程进行自动控制,情况良好。直控仪装置如图1a、b、c所示。一、工作原理我厂减压和常减压蒸馏生产过程的各种物理量,温度、压力、流量、液面、成份,经一次仪表进行测量放大后变成统一的0～10mA电流讯号,作为计算机的输入讯号。由于该讯号
Guided by Chairman Mao’s great guideline of “independence, self-reliance, preparation for war, preparation for war and for the people,” the technological level of industrial automation in our country has rapidly risen and electronic computers have been applied in industrial automatic control. In the great proletarian cultural revolution, our factory successfully used the direct digital controller in 1968 and 1970 to automatically control the vacuum distillation and vacuum distillation production process in good condition. Direct control device shown in Figure 1a, b, c below. First, the working principle of our plant vacuum and vacuum distillation process of the production of a variety of physical quantities, temperature, pressure, flow, level, composition, after a measurement instrument amplified into a unified 0 ~ 10mA current signal, as a computer The input signal. Due to the signal