基于MODEM的远程流量计量系统的设计  

Design of Remote Flow meters System Based on MODEM Communication

作　　者：钟斌[1] 程文明[1] 马莉丽[2] 

机构地区：[1]西南交通大学机械工程研究所,四川成都610031 [2]南通纺织职业技术学院,江苏南通226001

出　　处：《微计算机信息》2007年第03S期156-158,共3页Control & Automation

基　　金：四川省应用基础研究项目(04JY029-058-1);西南交大科技发展基金(2004A10)

摘　　要：为了满足流量计的串口数据和4～20mA电流信号输出形式,利用PIC16F877单片机分别设计了下位机与MODEM的通信硬件电路和软件,流量计的现场测量数据通过企业内部或公用电话网(PSTN)传输给PC机,实现远程流量计量系统。为了使系统可靠工作,主要采取了下位机的硬件和软件抗干扰措施。In order to meet flow meters＇ data and signal output mode of serial port and 4-20mA electric current signal, designed hardware circuit and software of communication between single chip microcomputer （PIC16F877） and MODEM.PC read and stores the data from long-range flow meters in real time through telephone network in corporation or public switched telephone network （PSTN）, and this is long-range flow measures system. In order to run reliably, the single chip microcomputer system carries on anti-interference measures from the aspects of hardware and software.

关 键 词：调制解调器 单片机 远程流量计 公用电话网 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]