Measurement of cantilever vibration using impedance-loaded surface acoustic wave sensor

被引：12
|
作者：
Oishi, Masaki [1 ]
Hamashima, Hiromitsu [2 ]
Kondoh, Jun [1 ,2 ,3 ]
机构：
[1] Shizuoka Univ, Grad Sch Integrated Sci & Technol, Hamamatsu, Shizuoka 4328561, Japan
[2] Shizuoka Univ, Grad Sch Engn, Hamamatsu, Shizuoka 4328561, Japan
[3] Shizuoka Univ, Grad Sch Sci & Technol, Hamamatsu, Shizuoka 4328561, Japan
来源：
JAPANESE JOURNAL OF APPLIED PHYSICS | 2016年 / 55卷 / 07期
关键词：
SAW DELAY-LINE; WIRELESS;
D O I：
10.7567/JJAP.55.07KD06
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
In this study, an impedance-loaded surface acoustic wave (SAW) sensor was demonstrated to monitor the vibration frequency. Commercialized pressure sensors and a variable capacitor were chosen as external sensors, which were connected to a reflector on a SAW device. As the reflection coefficient of the reflector depended on the impedance, the echo amplitude was influenced by changes in the impedance of the external sensor. The vibration frequency of the cantilever was determined by monitoring the echo amplitude of the SAW device. Moreover, the attenuation constant of an envelope was estimated. The results of our feasibility study indicate that the impedance-loaded SAW sensor can be applied as a detector for structural health monitoring. (C) 2016 The Japan Society of Applied Physics
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页数：6
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