DISCRIMINATION OF ECHO SIGNAL OF ACOUSTIC SURFACE WAVE RESONATOR
The surface acoustic wave (SAW) resonator measuring technology can be applied in realizing wireless passive parameter detection even with the environment of high temperature, high pressure, strong electromagnetic radiation and strong electromagnetic radiation interference.However, in the channel transmission, the signal is inevitably interfered and the shaded and shielded signal will appear, which is fatal to the parameter determination of the acoustic surface wave resonant echo.In order to avoid the error of output parameters, According to the time domain characteristics of surface acoustic wave echo signal, we proposed a signal screening methods(the surface acoustic wave resonance echo signal time domain method of screening), this method does not need to establish complex mathematical model, and it is simply effectively and timely to distinguish the error signal(the interfering signal and the shaded and shielded signal).The simulation results show that this method can accurately isolation the signal of low signal-to-noise ratio.Finally, the accuracy of the method is proved by the wireless passive SAW temperature sensing experiment.
Sound surface waves Resonance echo signal Signal discrimination
Jia-jia GUO Zhi-ming LUO Bo-quan LIU
Institute of Physical and Optoelectronic Engineering, Xiangtan University, Hunan Xiangtan, 411100
国际会议
The 2017 Symposium on Piezoelectricity,Acoustic Waves and Device Applications(2017全国压电和声波理论及器件技术研讨会)
成都
英文
70-76
2017-10-27（万方平台首次上网日期，不代表论文的发表时间）