Artículo de revista
Shear-wave corner retroreflector device for ultrasonic measurement of viscosity
Fecha
2021Registro en:
0041-624X
Universidad Autónoma de Occidente
Repositorio Educativo Digital
Autor
Barrera, Helver Mauricio
Formigoni, Paulo O.
Buiochi, Flávio
Franco, Ediguer
Institución
Resumen
This work shows a novel ultrasonic viscosity measurement device with increased sensitivity. The measuring
principle is based on the determination of the complex reflection coefficient of shear-waves at the solid–liquid
interface. But the proposed approach is the replacement of the flat surface at the measurement interface with
a grooved surface, which works in a similar way to an optical retroreflector. The complete reflection of the
waves involves a double reflection with oblique incidence, where both phenomena increase sensitivity, in
comparison with a plane surface. It is shown that a set of orthogonal flat interfaces reflects a well-defined
ultrasonic pulse. The sensitivity is enough to measure the change in the magnitude and phase of the reflection
coefficient even for the small portion of the energy transmitted to water. A model for calculating the viscosity
and a calibration approach for the measurement were proposed. Results with samples of corn syrup–water
mixture are reported