一种用于分布式控制系统的无线数字通信

A WIKELESS DIGITAL COMMUNICATION MODE USING FOR DISTRIBUTED CONTROLSYSTEM

在一般分布式控制系统中，数据交换大都采用有线通信方式，其有效距离仅为数百米，本文提出一种无线数字通信方式，把单片机作为智能发送终端或接收终端，并同时结合载波技术和调制解调技术，使得有效通信距离扩展到１０ｋｍ甚至数十公里。此外，本文提出的通信技术还克服了通常载波技术仅只能控制几个控制对象的缺陷，能方便地把控制对象增加到２５５个；不但每个控制对象能同主站（控制中心）交换信息，而且它们彼此之间也可交换信息，因此本文提出的无线数字通信方式普遍地适用于分布式控制系统，具有进一步开发的前景。

At present in the distributed control system the data interchange is commonly real-ized by wire communication mode ,by which the effective distance is only several hundredmeters.This paper has proposed a wireless digital communication mode,which uses thesin8le-chip microcomputer as the intelligence transmitter terminal or receiver terminal,the carrier wave technique and the modulatordemodulator,thus the effective distance isexpanded to ten kilometers or more, besides,the shortcoming that in common carrierthere are a fewobjects between which the information can be interchanged is eliminated,the controlled objects can be easily increased to 255 ,and every object not only can inter-change the information with the primary station(control center), but also can interchange the information each other. Therefore the wireless digital communication modeis maybe very applicable to the distributed control system.