The small volume liquid density sensor using surface acoustic wave

被引：0
|
作者：
Lu, Xiafu [1 ]
Luo, Yingqiong [1 ]
Wang, Ping [1 ]
Deng, Mingxi [2 ]
机构：
[1] Chongqing Univ Post & Telecommun, Automat Inst, Chongqing, Peoples R China
[2] Logist Engn Univ, Inst Staff Room Phys, Chongqing, Peoples R China
来源：
IEEE ICMA 2006: PROCEEDING OF THE 2006 IEEE INTERNATIONAL CONFERENCE ON MECHATRONICS AND AUTOMATION, VOLS 1-3, PROCEEDINGS | 2006年
关键词：
liquid density; surface acoustic wave; sensor;
D O I：
暂无
中图分类号：
TP [自动化技术、计算机技术];
学科分类号：
0812 ;
摘要：
Shear horizontal surface acoustic wave (SH-SAW) are generated and detected by interdigital transducers (IDT). When the viscoelastic liquid comes in contact with the delay path in a SH-SAW device, the viscous coupling action will effect on the wave propagation. Consequently the frequency, phase and propagating velocity of the SH-SAW will be altered. In this paper the properties of the acoustic wave in a liquid overlay on a piezoelectric substrate are investigated. The theory analysis and initial experiment are presented. The result shows when signal frequency is 57.8MHz, the SH-SAW can be excited effectively in the lithium niobate crystal. By measuring the phase change of the SH-SAW, the liquid density can be detected. Compared with traditional liquid density sensor, the SH-SAW liquid density sensor has the advantages of simple construction, high precision and little sample etc.
引用
收藏
页码：2105 / +
页数：2
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