2012 Fiscal Year Final Research Report
Study on low-loss surface acoustic wave sensor installed in sensor network
| Project/Area Number |
22560342
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Electron device/Electronic equipment
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| Research Institution | Kogakuin University |
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Principal Investigator |
HIKITA Mitsutaka 工学院大学, グローバルエンジニアリング学部, 教授 (00407157)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 弾性表面波 / SAW、センサネットワーク / 弾性表面波センサ / SAW センサ / ZigBee |
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| Research Abstract |
We have studied a novel SAW gas sensor for odors from patients or in sickrooms and hydrogen-gas leakage from future fuel-cell cars. The developed sensor will be installed in sensor network. The use in a garage as sensor nodes must guarantee large temperature range from -40 to 80 °C, which requires the self-temperature-compensation characteristics as an essential feature. Moreover, the sensor nodes must operate over couples of years under a single battery, which requires very low-power consumption and very low-loss characteristics for SAW sensors. In this study
(1) we achieved the self-temperature-compensation characteristics which removed the limitation for piezoelectric crystal substrates such as a Quartz substrate;
(2) we developed a new lattice-circuit type low-loss sensor consisting of SAW resonators which could make it possible to be included in sensor nodes;
(3) in order to increase the sensing sensitivity we proposed a double-reflection type SAW resonators which had effectively expanded the interaction areas reactive to sensing gas. Experimental and simulation results are presented.
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