摘要
在声表面波无线传感的实际应用中,针对以差动形式同时出现的两个声表面波谐振器设计了一种采用双本振源激励的阅读器,每次产生包括两个载波频率的激励信号,使两个谐振器同时响应。实际搭建了无线测量系统,对阅读器的发射和接收链路进行了测试,并通过上位机实时显示谐振频率,测量结果表明了系统的可靠性。最后,实验分析了系统在不同载波频率激励信号下的差动频率测量结果和最远测量距离。
In the practical application of the surface acoustic wave （SAW） wireless sensing, concerning to the two SAW resonators as differential-type structure, one type of reader utilizing double local-oscillator excitation is designed. The reader could create an excitation signal including two cartier frequencies, so the two SAW resonators could response simultaneously. The wireless measurement system is established, and the transmit and receive chains are tested accordingly. The measurement resuhs of the resonant frequencies displayed on the upper monitor show the reliability of the system. Furthermore, the measurement results of the differential frequencies and the longest distances under different excitation signals with different carrier frequencies are analyzed.
作者
陈赵兴
陈智军
李庆亮
陈涛
赵文玉
CHEN Zhao-xing;CHEN Zhi-jun;LI Qing-liang;Chen Tao;ZHAO Wen-yu(College of Automation Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing,Jiangsu 211106,China;College of Mechanical and Electrical Engineering,Shenzhen Institute of Information Technology,Shenzhen,Guangdong 518172,China)
出处
《计量学报》
CSCD
北大核心
2018年第5期708-711,共4页
Acta Metrologica Sinica
基金
国家自然科学基金(51475240)
航空科学基金(2014ZD52053)
关键词
计量学
声表面波谐振器
谐振频率
无线测量系统
双本振源
metrology
surface acoustic wave resonator
resonant frequency
wireless measurement system
doublelocal-oscillator
