An acoustic transmission sensor for the longitudinal viscosity of fluids

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• 作者：Hannes Antlinger ; Stefan Clara ; Roman Beigelbeck ; Samir Cerimovic ; Franz Keplinger ; Bernhard Jakoby
• 关键词：Pressure waves ; Physical fluid properties ; Second coefficient of viscosity ; Liquid condition monitoring ; Viscosity sensors ; Ultrasonic sensors
• 刊名：Sensors and Actuators A: Physical
• 出版年：1 November, 2013
• 年：2013
• 卷：202
• 期：Complete
• 页码：23-29
• 全文大小：1334 K

文摘

Physical fluid parameters like viscosity, mass density and sound velocity can be determined utilizing ultrasonic sensors. We introduce the concept of a recently devised transmission based sensor utilizing pressure waves to determine the longitudinal viscosity, bulk viscosity, and second coefficient of viscosity of a sample fluid in a test chamber. A model is presented which allows determining these parameters from measurement values by means of a fit. The setup is particularly suited for liquids featuring higher viscosities for which measurement data are scarcely available to date. The setup can also be used to estimate the sound velocity in a simple manner from the phase of the transfer function.