Experimental Study on the Determination of the Shear-Wave Reflection Coefficient at the Solid-Liquid Interface

摘要

This work implements the ultrasonic shear-wave reflectance method for viscosity measurements. A mode-conversion device was used for the dynamic viscosity measurement of mineral oil, SAE 40 automotive oil and glycerin samples at room temperature and 1 MHz. A novel signals processing technique that calculates the reflection coefficient magnitude in a frequency band, instead of a single frequency, was employed, showing an important improvement on the measurement accuracy.