电站锅炉内壁温监测信号无线传输特性研究  

Study on Wireless Transmission Characteristics of Heating Surface Temperature Monitoring Signals in a Power Plant Boiler

作　　者：侯哲帆 王鑫雨 李鸿源[1] 徐鸿[1] HOU Zhefan;WANG Xinyu;LI Hongyuan;XU Hong(School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China)

机构地区：[1]华北电力大学能源动力与机械工程学院,北京102206

出　　处：《动力工程学报》2021年第5期368-373,共6页Journal of Chinese Society of Power Engineering

基　　金：国家重点研发计划资助项目(2018YFB0604402);中央高校基本科研业务费专项资金资助项目(2019MS015)。

摘　　要：在声表面波(SAW)测温原理的基础上,建立了电站锅炉高温受热面温度特征信号无线传输的有限元模型,通过实验对该模型进行了验证,并对比研究了偶极子天线、法向螺旋天线、平面倒F天线(PIFA)3种天线结构下温度特征信号的无线传输特性。结果表明:有限元模型可以有效地反映声表面波温度特征信号的无线传输特性;基于偶极子天线和法向螺旋天线的温度特征信号无线传输增益呈周向对称分布,而基于PIFA的温度特征信号无线传输增益具有明显的方向性;基于偶极子天线的温度特征信号无线传输增益最大,无线传输带宽也最大,约为40 MHz,基于法向螺旋天线的无线传输带宽最小,仅为3 MHz。The finite element model of temperature characteristic signal wireless transmission on the heating surface of a power plant boiler was established with surface acoustic wave(SAW) temperature measurement as the principle. The model was verified by experiment and different wireless transmission characteristics of temperature signal under three antenna structures, namely dipole antenna, normal spiral antenna and planar inverted F antenna(PIFA), were compared. Results show that the finite element model can effectively reflect the wireless transmission characteristics of surface acoustic wave temperature characteristic signal;the wireless transmission gain of temperature characteristic signal from dipole antenna and normal spiral antenna is circumferential symmetrical distribution, while the wireless transmission gain of temperature characteristic signal from PIFA antenna has obvious directionality;the temperature characteristic signal from dipole antenna has the largest wireless transmission gain and the largest wireless transmission bandwidth, which is about 40 MHz. While the wireless transmission bandwidth of normal spiral antenna is the smallest, which is only 3 MHz.

关 键 词：锅炉 温度监测 声表面波 无线传输特性 有限元 

分 类 号：TK31[动力工程及工程热物理—热能工程]