摘要
高温环境下供电和导线联接困难,一般电子元件难以正常工作,因此高温环境下温度、压力等物理量的监测一直是一项较难解决的技术难题。新兴的硅酸钾镧(LGS)压电晶体具有良好的压电和高温特性,为声表面波(SAW)传感器的高温应用提供了可能。该文分析了新兴LGS压电晶体的高温及SAW特性,讨论了它在高温无线无源传感方面的应用途径和关键问题。初步的实验证明了基于LGS的高温SAW无线无源传感系统的可行性。
Power supply and cable connection is difficult in the environment of high-temperature (HT), and the general electro-elements also out of gear. Therefore the measurement of temperature and pressure in HT is always a difficult problem. The new LGS crystal has well piezoelectric characteristics and temperature stability, which provides possibility for the HT applications of SAW sensors.In this paper, the HT and SAW properties of LGS are analyzed, and the methods and key questions about its application in HT wireless passive sensor are discussed. The feasibility about HT wireless passive SAW sensing system based on LGS has been verified by the initial experiment.
出处
《压电与声光》
CSCD
北大核心
2005年第2期89-92,共4页
Piezoelectrics & Acoustooptics
基金
国家自然科学基金资助项目(60274062)
关键词
高温
声表面波(SAW)
硅酸钾镧(LGS)
无线无源传感系统
high-temperature (HT)
surface acoustic wave (SAW)
LGS (La_3Ga_5SiO_(14))
wireless passive sensing system
