Echo Frequency Estimation of Surface Acoustic Wave Resonator Based on Phase Information in Frequency Domain
LI Ya-fei1,CHEN Zhi-jun1,2,ZHU Wei-jun3,HUANG Hong-wei1,XIONG Zhi-qiang1
1. College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, China
2. Key Laboratory of Non-destructive Testing and Monitoring of High-speed Transport Facilities of Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, China
3. CETC Deqing Huaying Electronics Co., Deqing, Zhejiang 313200, China
Abstract：A frequency estimation algorithm based on the phase information in the frequency domain was proposed, which estimated the echo frequency of surface acoustic wave resonator (SAWR)by using the relationship between frequency and phase in the Fourier transform phase spectrum of sinusoidal signal, and the autocorrelation operation was performed for eliminating the influence of the initial phase of echo signal on the estimation results. The algorithm was verified by wireless test system and simulation echo signal. It was shown that the frequency estimation accuracy of the algorithm is not affected by the frequency change of the excitation signal, and has high accuracy and stability in the whole variation range of resonance frequency of SAWR.
李亚飞,陈智军,朱卫俊,黄鸿伟,熊志强. 基于频域相位信息的声表面波谐振器回波频率估计[J]. 计量学报, 2020, 41(7): 848-851.
LI Ya-fei,CHEN Zhi-jun,ZHU Wei-jun,HUANG Hong-wei,XIONG Zhi-qiang. Echo Frequency Estimation of Surface Acoustic Wave Resonator Based on Phase Information in Frequency Domain. Acta Metrologica Sinica, 2020, 41(7): 848-851.
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2020, Vol. 41 
