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随着科学技术的快速发展,过程控制领域在过去的两个世纪里发生了巨大的变革。150多年前出现的基于5-13psi的气动信号标准(PCS,neumatic Control System气动控制系统)标志着控制理论初步形成,但此时尚未有控制室的概念;20世纪50年代,随着基于0-10mA或4-
With the rapid development of science and technology, the process control field has undergone tremendous changes in the past two centuries. The emergence of control theory based on PCS (neumatic Control System PCS) of 5-13 psi over 150 years ago did not have the concept of control room. In the 1950s, 10mA or 4-