Dual-Frequency Interrogation and Hierarchical Evaluation Scheme for SAW Reflective Delay-Line Sensors.

Ruchuan Shi,Jingping Ruan,Jiashi Lv,Chenrui Zhang,Tao Han,Peng Qin,Ping Li,Yumei Wen

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control（2020）

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摘要

The resolution of phase difference ambiguity is critically important for simultaneously achieving wide range and high accuracy sensing with surface acoustic wave (SAW) reflective delay-line sensors. A novel scheme called dual-frequency interrogation and hierarchical evaluation (DFI-HE) is proposed to resolve integer ambiguity of phase difference and obtain precise time delay between reflectors. Wi...

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关键词

Surface acoustic waves,Delay effects,Phase measurement,Time measurement,Temperature measurement,Temperature sensors

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