Research on resonant frequency measurement in SAW strain sensing

CHEN Lei; XU Chun-guang; ZHOU Shi-yuan; XIAO Ding-guo

doi:10.13873/j.1000-97872009.02.033

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Research on resonant frequency measurement in SAW strain sensing

更新时间：2025-09-11

- Research on resonant frequency measurement in SAW strain sensing
- Vol. 28, Issue 2, Pages: 32-34(2009)
- 作者机构：
  
  北京理工大学机械与车辆工程学院
- 作者简介：
- 基金信息：
- DOI：10.13873/j.1000-97872009.02.033
  CLC： TP274
- Published：2009
- 稿件说明：
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[1]陈磊,徐春广,周世圆,肖定国.SAW应变测量中谐振频率提取技术研究[J].传感器与微系统,2009,28(02):32-34.

CHEN Lei, XU Chun-guang, ZHOU Shi-yuan, et al. Research on resonant frequency measurement in SAW strain sensing[J]. 2009, 28(2): 32-34.
[1]陈磊,徐春广,周世圆,肖定国.SAW应变测量中谐振频率提取技术研究[J].传感器与微系统,2009,28(02):32-34. DOI： 10.13873/j.1000-97872009.02.033.

CHEN Lei, XU Chun-guang, ZHOU Shi-yuan, et al. Research on resonant frequency measurement in SAW strain sensing[J]. 2009, 28(2): 32-34. DOI： 10.13873/j.1000-97872009.02.033.

摘要

声表面波（SAW）应变测量中

所要处理的回波信号具有瞬时、中频、窄带的特点

传统的傅立叶变换（FFT）频谱分析法的频率分辨率受信号采样长度的制约

无法满足SAW应变测量的精度要求。通过对SAW谐振器工作原理的分析

采用基于数字下变频技术测量回波信号频率

仿真验证和对实测信号的测量证明了该测量方法的可行性与有效性。

Abstract

The echo signals in SAW strain sensing have characteristics of instantness

intermediate frequency and narrowband.The frequency resolution of the tradition FFT analytical method is restricted by signal sampling length.The resolution can’t fit precision in SAW strain sensing.Through analyzing the theory of SAW resonator

digital down conversion is used to mearsure the frequency of echo signal.The feasibility and validity of the method is proved by simulation and experiment.

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Keywords

references

声表面波谐振器的时域响应特性研究 [J]. 李平,文玉梅,王军峰,黄尚廉. 压电与声光 . 2003(02)

软件无线电原理与应用[M]. 电子工业出版社 , 杨小牛等著, 2001

误差理论与数据处理[M]. 机械工业出版社 , 费业泰主编, 2000

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