基于直流载波技术的智能温度变送器传输系统  

Intelligent Temperature Transmitter Transmission System Based on DC Carrier Technology

作　　者：赖小皇 陈洪敏 LAI Xiaohuang;CHEN Hongmin(Sichuan Tianli Technology Co.,Ltd.,Mianyang Sichuan 621000,China)

机构地区：[1]四川天利科技有限责任公司

出　　处：《电子器件》2019年第5期1254-1259,共6页Chinese Journal of Electron Devices

摘　　要：为解决工业生产现场在检测温度信号时所带来的线缆多、传输距离长、布线及采集设备成本高的问题,设计了一种基于二线制数据/电源叠加传输的总线型智能温度变送器数据采集系统。采用直流载波技术将传统的电源与数据分别进行传输的四线制总线合并为电源/数据复用型总线,实现了长线、多节点、半双工通信的温度信号采集。对本设计系统进行了试验验证,结果表明系统具有较高的测试精度与稳定性。In order to solve the problems of many cables,long transmission distance and high cost of wiring and collecting equipment when monitoring the temperature in industrial production sites,a bus-type intelligent temperature transmitter data acquisition system based on two-wire data/power superposition transmission is designed.The four-wire bus with traditional power supply and data transmission is combined into a power/data multiplexed bus by DC carrier technology,to realize temperature signal acquisition for long-line,multi-node,and half-duplex communication.The design system is verified by experiments.The results show that the system has high test accuracy and stability.

关 键 词：智能温度变送器 直流载波 二线制总线 调制解调 

分 类 号：TM721.1[电气工程—电力系统及自动化]