2012 Fiscal Year Final Research Report
Liquid-Level Sensing Utilizing Evanescent Waves Created inPiezoelectric Vibrators Operating in Trapped-Energy Modes
| Project/Area Number |
22560340
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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 | Tohoku Gakuin University |
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Principal Investigator |
YAMADA Ken 東北学院大学, 工学部電子工学科, 教授 (80134021)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 超音波センサ / エバネセント波 / エネルギー閉じ込め振動子 / 液面レベル計測 |
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| Research Abstract |
The measurement of liquid level on the millimeter scale or less has become an important subject in biological and chemical fields. As an alternative to the well -known pulse-echo method, we have presented a new technique that employs a piezoelectric thickness vibrator operating in a trapped-energy mode for detecting a small-scale variation in liquid level. The variation in the electric conductance G with the liquid level has been observed by experiments and also by theoretical analysis using an equivalent-network model, and the feasibility of the sensing device is confirmed.
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