Journal of Shanghai Jiaotong University ›› 2018, Vol. 52 ›› Issue (10): 1314-1323.doi: 10.16183/j.cnki.jsjtu.2018.10.021

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Surface Acoustic Wave Based Wireless and Passive Sensors

HAN Tao,JI Xiaojun,LI Ping,WEN Yumei,SHI Wenkang   

  1. Department of Instrument Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Abstract: Surface acoustic wave (SAW) sensors endowed with the unique advantage of truly passive and naturally wireless operating principle attract much attentions in some applications, such as Internet-of-Things, smart grid, smart cities, and so forth. Some research results in SJTU on the fundamental theory of SAW, precise modeling of SAW sensors, design of wireless interrogation system, the sensing information acquisition and signal processing algorithm in the past 20 years have been summarized. The wireless SAW temperature sensor applications in the temperature monitoring of the breaker contacts of a switchgear, the cable joints in ring main units, and the oil temperature and level of power distribution transformers have been presented. Additionally, the wireless SAW sensor withstanding high temperature environment has been developed and applied in temperature monitoring of the high-frequency induction-heated cells in aluminium smelting.

Key words: surface acoustic wave (SAW), wireless and passive, sensors, intelligent distribution grid, high temperature resistance

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