延迟线型无源声表面波压力传感器结构的研究  

A Structure of Delay Line Passive SAW Pressure Sensor

作　　者：叶浩 王代强 

机构地区：[1]贵州大学大数据与信息工程学院,贵州贵阳550025 [2]贵州民族大学机械电子工程学院,贵州贵阳550025

出　　处：《贵州大学学报（自然科学版）》2017年第5期62-65,共4页Journal of Guizhou University:Natural Sciences

基　　金：国家自然科学基金(11564005);贵州省功率元器件重点实验室项目基金(KFJJ201501);贵州民族大学引进人才基金项目(16yjrcxm001)

摘　　要：提出了一种新型无源声表面波压力传感器结构,在传统反射式延迟线型无源声表面波压力传感器的结构的基础上,加入了多条耦合器,使传统单声路结构变为双声路结构,利用二端口网络进行了分析,结果证明提高了回波的信噪比。在无线测量系统中,对回波信号的测量利用了正交相干检波的方式,用相位的检测代替了时延的检测,提高了测量精度。A new passive surface acoustic wave pressure sensor structure was proposed. Based on the traditional structure of the reflective delay line surface acoustic wave passive pressure sensor on the joined multistrip cou-pler, the traditional single path structure into the dual path structure was analyzed by using the two port network. The results show that improved the SNR of echo has been improved. In the wireless measurement system, the method of quadrature coherent detection was used to detect the echo signal, and the phase detection was used to replace the detection of delay.

关 键 词：声表面波 反射型延迟线 多条耦合器 双声路 相干检波 

分 类 号：TN65[电子电信—电路与系统]