ALSTOM IR139-1 阿尔斯通 控制设备

ALSTOM  IR139-1 阿尔斯通 控制设备

ALSTOM  IR139-1 阿尔斯通 控制设备

品牌:ALSTOM

型号 ：IR139-1

产品描述

ALSTOM  IR139-1 阿尔斯通 控制设备意味着通过它可以按照所希望的方式保持和改变机器、机构或其他设备内任何感兴趣或可变的量。控制系统同时是为了使被控制对象达到预定的理想状态而实施的。控制系统使被控制对象趋于某种需要的稳定状态。

70年代中期，由于设备大型化、工艺流程连续性要求高、要控制的工艺参数增多，而且条件苛刻，要求显示操作集中等，使已经普及的电动单元组合仪表不能完全满足要求。在此情况下，业内厂商经过市场调查，确定开发的DCS产品应以模拟量反馈控制为主，辅以开关量的顺序控制和模拟量开关量混合型的批量控制，它们可以覆盖炼油、石化、化工、冶金、电力、轻工及市政工程等大部分行业。

1975年前后，在原来采用中小规模集成电路而形成的直接数字控制器（DDC）的自控和计算机技术的基础上，开发出了以集中显示操作、分散控制为特征的集散控制系统（DCS）。由于当时计算机并不普及，所以开发DCS应强调用户可以不懂计算机就能使用DCS;同时，开发DCS还应强调向用户提供整个系统。此外，开发的DCS应做到与中控室的常规仪表具有相同的技术条件，以保证可靠性、安全性。

ALSTOM  IR139-1 阿尔斯通 控制设备

Brand :ALSTOM

Model: IR139-1

Product description

ALSTOM IR139-1 Alstom control equipment means that through it any amount of interest or variable within a machine, mechanism or other equipment can be maintained and changed in the desired way. At the same time, the control system is implemented to make the controlled object reach the predetermined ideal state. The control system tends the controlled object to a certain desired stable state.

In the mid-1970s, due to the large size of equipment, high requirements for process continuity, increased process parameters to be controlled, harsh conditions, and centralized display operations, the already popular electric unit combination instrument can not fully meet the requirements. In this case, the industry manufacturers through market research, determined that the development of DCS products should be based on analog quantity feedback control, supplemented by switching quantity sequence control and analog quantity switching quantity mixed batch control, they can cover oil refining, petrochemical, chemical, metallurgy, electric power, light industry and municipal engineering and other most industries.

Around 1975, on the basis of the automatic control and computer technology of the direct digital controller (DDC) formed by the original small and medium-sized integrated circuit, a distributed control system (DCS) characterized by centralized display operation and decentralized control was developed. Since computers were not popular at that time, the development of DCS should emphasize that users can use DCS without understanding computers; At the same time, DCS development should also emphasize providing the entire system to the user. In addition, the DCS developed should have the same technical conditions as the conventional instruments in the central control room to ensure reliability and safety.