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虽然气动仪表在本质防爆和可靠性等方面优于电动仪表,但是气压信号的传送滞后却在很大程度上限制了它在大规模控制系统中的应用,为了克服这个缺点,以前的对策有:①使用内径大的传送管道;②使用输出功率大的放大器;③调节器现场安装,即采用所谓四线制的控制方法。经过不断地完善和改进,这些方法在多年的生产实践中已经取得不少成效,但是在传送距离更长的场合,在实用上就存在很多问题。为此,一些仪表制造厂从理论上和实践上坚持不懈地研究解决传送滞后的新途径,横河、山武-霍尼韦尔、日立等厂家近年来相继开发的传送补偿器具有卓越的性能,正越来越受到人们的重视,本文就其作用原理和应用作简单的介绍。
Although pneumatic instruments are inherently better than electric instruments in terms of inherent explosion-proof and reliability, the lag of pneumatic signal transmission greatly limits its application in large-scale control systems. In order to overcome this shortcoming, the previous countermeasures include: ① the use of large diameter transmission pipe; ② the use of large output power amplifier; ③ regulator on-site installation, the so-called four-wire control method. After continuous improvement and improvement, these methods have achieved a lot of success in many years of production practice, but there are many problems in practical application when the transmission distance is longer. To this end, some instrument manufacturers in theory and practice unremittingly research and solve transmission lag new ways, Yokogawa, Yamatake - Honeywell, Hitachi and other manufacturers in recent years have been developed transmission compensator has excellent performance, More and more people are paying attention to this article on its role and application of a simple introduction.