Improvement of Lamb waves sensors
| Autor: | François Bastien, M De Labachelerie, H. Jia, Jean-François Manceau, R. Duhamel |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
business.industry
Chemistry Acoustics Attenuation Metals and Alloys Acoustic wave Repeatability Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials Compensation (engineering) Stress (mechanics) Optics Lamb waves Perpendicular Sensitivity (control systems) Electrical and Electronic Engineering business Instrumentation |
| Zdroj: | Sensors and Actuators A: Physical. 121:321-326 |
| ISSN: | 0924-4247 |
| DOI: | 10.1016/j.sna.2005.02.014 |
| Popis: | Anti-symmetrical Lamb wave mode A0 presents a large sensitivity to mass loading and can be used in contact with liquids with a small attenuation. In a practical use point of view, the main problem of this kind of sensor is its temperature sensitivity. The influence of stress on temperature sensitivity has been studied. A first experiment is based on a stress compensation produced by differential thermal dilatation. The results showed a poor repeatability. Then, a completely different method has been developed. On the same membrane, two different waves with perpendicular propagating directions are produced. Experimentally, temperature sensitivity is rather different depending on the propagation direction but mass sensitivity is almost the same, which allows to distinguish temperature effects and effects due to mass loading on the frequency shift measurements. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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