1.College of Automation Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu 211106, China
2.College of Mechanical and Electrical Engineering, Shenzhen Institute of Information Technology, Shenzhen, Guangdong 518172, China
Abstract：In the practical application of the surface acoustic wave (SAW) wireless sensing, concerning to the two SAW resonators as differential-type structure, one type of reader utilizing double local-oscillator excitation is designed.The reader could create an excitation signal including two carrier frequencies, so the two SAW resonators could response simultaneously.The wireless measurement system is established, and the transmit and receive chains are tested accordingly.The measurement results of the resonant frequencies displayed on the upper monitor show the reliability of the system.Furthermore, the measurement results of the differential frequencies and the longest distances under different excitation signals with different carrier frequencies are analyzed.
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2018, Vol. 39 
