基于DPSK多载波调制技术的电气测温技术的研究  

A New Electrical Temperature Measurement Technology Based on DPSK Multicarrier Modulation

作　　者：李祖明[1] 丁云广 姜庆阳 许峰[1] 毕睿华[1] LI Zuming;DING Yunguang;JIANG Qingyang;XU Feng;BI Ruihua(School of Electric Power Engineering,Nanjing Institute of Technology,Nanjing 211167,China;Key laboratory of Space Physics,Beijing 100076,China;School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210095,China)

机构地区：[1]南京工程学院电力工程学院,江苏南京211167 [2]空间物理重点实验室,北京100076 [3]南京理工大学机械工程学院,江苏南京210095

出　　处：《机械与电子》2020年第11期55-59,65,共6页Machinery & Electronics

基　　金：国家电网公司2020年科技项目(J2020061)。

摘　　要：针对诸多电气领域需要在狭小空间内进行多节点温度实时测量,而传统总线系统存在传输速率有限布线繁杂的问题,研究了基于差分相移键控(DPSK)多载波调制的二总线测温方法,在二总线上进行多载波数据的调制与解调,通过FPGA完成串并电路转化的算法,实现一种可用于电气设备内部布设的多节点高速传输的测温总线系统。该技术在原有二总线架构的基础上,采用载波方法变串行通信为并行通信,既保留了二总线结构简单的优点又有效提高了传输效率。算法验证与仿真结果表明,该方法可在256个带载测试节下,有效进行并行传输,信息传输正确率较高,为二总线进一步优化与推广提供了理论支撑。A two-bus temperature measurement method,based on differential phase shift keying(DPSK)multi carrier modulation,was proposed to address the real-time temperature measurement in many electrical fields such as limited transmission rate and complicated wiring in the traditional bus system.This method of DPSK modulation can modulate and demodulate the multicarrier data on the two bus,and complete the algorithm of serial parallel circuit conversion through FPGA,so as to realize a temperature measurement bus for high-speed transmission of multiple nodes in the internal layout of electrical equipment.Through the algorithm verification and simulation,the data transmission efficiency of this method can be improved by 8 times under 256 on-load test sections.Based on the original two bus architecture,the carrier method is applied to change serial communication into parallel communication,which not only retains the advantages of simple two bus structure,but also effectively improves the transmission efficiency,providing theoretical support for further optimization and promotion of the two bus.

关 键 词：二总线 DPSK 多载波调制 载波同步 并行传输 

分 类 号：TH811[机械工程—仪器科学与技术]