一种新型的无源无线SAW温度传感器的研究  

Study on a Novel Passive Wireless SAW Temperature Sensor

作　　者：巩凡 宋倩倩[2] 陈开鑫[2] 

机构地区：[1]国网日照供电公司,山东日照276800 [2]电子科技大学通信与信息工程学院,四川成都611731

出　　处：《压电与声光》2017年第3期405-407,412,共4页Piezoelectrics & Acoustooptics

基　　金：国网山东公司科技基金资助项目(41061715B026)

摘　　要：该文介绍了一种新型的无源无线声表面波温度传感器,传感器的能量来自外界的无线电磁波。通过利用多条耦合器及位于不同声路的两条反射栅,实现了在消除体声波(BAW)干扰的同时,利用两条声表面波(SAW)传输路径差引入相应的声传播延迟,用以提高测温精度。该声表面波温度传感器可采用小波函数包络加权叉指换能器,从而抑制了频率响应曲线中的旁瓣,提高了品质因数。此外,通过使用一个叉指换能器的单端输入、单端输出的结构,可有效减小传感器的体积,使其具有广泛的应用范围。A Novel passive wireless surface acoustic wave （SAW） temperature sensor is presented in this paper. The sensor energy comes from the wireless electromagnetic waves at the outside world. A multi-strip coupler and two reflectors located different tracks are used. The former can eliminate the disturbance from bulk acoustic wave （BAW） , while the latter can improve the accuracy of the temperature measurement by introducing a delay between the two SAW propagation tracks. In addition, the IDT with wavelet envelope weight is used to suppress the side- lobe of the frequency response curve and improve the quality factor. Meanwhile, the transducer structure with the single-ended input and single-ended output is also used to reduce the size of the sensor effectively and enlarge the ap-plying scope.

关 键 词：温度传感器 声表面波 小波函数包络加权 叉指换能器 反射栅 

分 类 号：TN65[电子电信—电路与系统]