Ultrasonic sensor for the presence of oily contaminants in water
The measurement of the reflection coefficient of ultrasonic shear-waves at the solid-liquid interface is a technique employed for the measurement of the viscoelastic properties of liquids. An interesting property of the measurement technique is the very small penetration depth of the shear-waves int...
- Autores:
-
Franco, Ediguer Enrique
Adamowski, Julio Cezar
Buiochi, Flávio
- Tipo de recurso:
- Article of journal
- Fecha de publicación:
- 2012
- Institución:
- Universidad Nacional de Colombia
- Repositorio:
- Universidad Nacional de Colombia
- Idioma:
- spa
- OAI Identifier:
- oai:repositorio.unal.edu.co:unal/35070
- Acceso en línea:
- https://repositorio.unal.edu.co/handle/unal/35070
http://bdigital.unal.edu.co/25150/
- Palabra clave:
- Ultrasound
shear waves
oil-in-water emulsion
oily contaminant
- Rights
- openAccess
- License
- Atribución-NoComercial 4.0 Internacional
| Summary: | The measurement of the reflection coefficient of ultrasonic shear-waves at the solid-liquid interface is a technique employed for the measurement of the viscoelastic properties of liquids. An interesting property of the measurement technique is the very small penetration depth of the shear-waves into the liquid sample, that permits measurements with liquid films of some micrometers thick. This property, besides the well known tendency of oily substances to stick to the surfaces, can be used for the detection of oily contaminants in water. In this work, the employment of the ultrasonic shear-wave reflection technique to the detection of oily contaminants in water is proposed and the theoretical and experimental concepts involved are discussed. Preliminary experimental results show the measurement technique can detect SAE 40 automotive oil in water in volume proportions less than 0.5%. |
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