介绍了标校系统中四种常用的远程通信方案 ,分别是RS -4 2 2 /4 85方案、有线modem方案、电话网方案和对讲机方案 ,比较了它们的优缺点。提出了采用GSM短消息进行远程通信的新方案 ,分析了关键技术 ,解决了给出途径。最后给出了新方案的数据发送流程图和数据接收流程图。

In this paper, four common methods of remote communication used in collimating system are introduced. They are RS-422/485 method, modem method, PSTN method and intercom method. Their merits and demerits are also compared. Then, a new technique of remote communication based upon the SMS is suggested. After analyzing the key technologies, a solution is given. Finally, the flow charts of data transmitting and the data receiving are presented. [

TN957.2 TN919.23