一、工业用控制系统的演变日本国内电子式控制仪表的商品化是从五十年代末期开始的(参看图1)。因为那时晶体管已成为可靠的元件。PID控制算法是以连续过程为对象的,调节器以这种算法为基础来达到反馈控制目的。这类调节器装在宽75高150毫米大小面板的框体内,在面板上集中配置使用。五十年代末是以石油,石油化学工业为中心的连续生产过程相继建成的起始时期。当时这种调节器是和原来的气动式装置同时并用,对这些连续生产过程进行控制。 I. Evolution of Industrial Control Systems The commercialization of electronic control instruments in Japan started in the late 1950s (see Figure 1). Because then the transistor has become a reliable component. PID control algorithm is a continuous process for the object, the regulator based on this algorithm to achieve the purpose of feedback control. This type of regulator installed in the width of 75 high 150 mm panel size of the panel, the panel focused on the use of configuration. The end of the fifties is the beginning of a series of successive production processes centered on petroleum and petrochemical industry. At the time this regulator was used in conjunction with the original pneumatic device to control these continuous production processes.