Oil viscosity measurement by ultrasonic reflectance |
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Authors: | Raffaella Saggin John N Coupland |
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Affiliation: | (1) Department of Food Science, The Pennsylvania State University, 103 Borland Laboratory, 16802 University Park, Pennsylvania |
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Abstract: | Pulses of shear-mode ultrasound (center frequency 10 MHz) are reflected from the surface of a series of vegetable and synthetic
high-viscosity calibration oils at a range of temperatures (5–50°C). For all samples and temperatures there is a single negative
correlation between the magnitude of the echo from the interface between the delay-line and the sample and the viscosity of
the sample. Similar experiments with longitudinal ultrasonic waves show the amount of sound reflected decreased with increasing
viscosity, but there is no single correlation for all samples. |
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Keywords: | Longitudinal waves oils reflection coefficient sensors shear waves ultrasound viscosity |
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