声表面波扭矩检测系统的分段环状天线设计  

Design of Segmented Loop Antenna for Surface Acoustic Wave Torque Measurement System

作　　者：熊志强 陈智军[1] 孙聪[1] 朱卫俊[2] 郭佳佳 XIONG Zhiqiang;CHEN Zhijun;SUN Cong;ZHU Weijun;GUO Jiajia(College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China;CETC Deqing Huaying Electronics Co. , Deqing 313200, China)

机构地区：[1]南京航空航天大学自动化学院,江苏南京211106 [2]中电科技德清华莹电子有限公司,浙江德清313200

出　　处：《压电与声光》2020年第6期747-751,共5页Piezoelectrics & Acoustooptics

基　　金：航空科学基金资助项目(2014ZD52053);江苏省研究生科研与实践创新计划基金资助项目(SJCX20_0069)。

摘　　要：天线设计是实现无线无源声表面波扭矩检测的重要环节。针对待测扭矩的转轴结构设计了阅读器的分段环状天线,使用三维电磁仿真软件HFSS仿真了天线的中心频率、带宽、输入阻抗和方向图,在仿真优化的基础上制作了分段环状天线,并进行了相应的测试。测试结果表明,天线中心频率为431.6 MHz、带宽为424~440 MHz、输入阻抗接近50Ω,且天线所在平面具有较好的全向性。包括该阅读器天线的声表面波扭矩检测系统可实现较准确的扭矩测量,在-80~80 N·m时满量程误差为2.5%。The antenna design is an important part for realizing wireless and passive surface acoustic wave torque measurement.The segmented loop antenna of the reader is designed for the rotating shaft structure of the torque to be measured,and the three-dimensional electromagnetic simulation software HFSS is used to simulate the center frequency,bandwidth,input impedance,and directivity pattern.On the basis of simulation and optimization,the segmented loop antenna is fabricated and tested.The measurement results show that the center frequency of the antenna is 431.6 MHz,the bandwidth is 424~440 MHz,the input impedance is close to 50Ω,and the plane where the antenna is located has good omni-directionality.The surface acoustic wave torque measurement system including the reader antenna can realize accurate torque measurement,and the full-scale error is 2.5%from-80 N·m to 80 N·m.

关 键 词：扭矩检测 声表面波 分段环状天线 三维电磁仿真软件 全向性 

分 类 号：TN820[电子电信—信息与通信工程]