Noncontact on-line measurement of the viscosity of liquid paint

Details Noncontact on-line measurement of the viscosity of liquid paint Noncontact on-line measurement of the viscosity of liquid paint

1990-02-12

1991-04-09

Williams, Hezron E.

Measuring and testing

Liquid analysis or analysis of the suspension of solids in a...

Viscosity

73 644, G01N 1100, G01N 1302

Patent

active

050054015

ABSTRACT:
A method and apparatus for non-contact measurement of the viscosity of a liquid such as paint. In accordance with the method and apparatus, the surface of a liquid is perturbed with a standing wave of predetermined wavelength. This perturbation is effected by directing a burst of air against the surface of the liquid using periodically spaced air nozzles. The frequency and rate of decay of the induced surface wave is measured using typically optical means including a reflected light beam. The measured frequency and decay rate are combined with the known depth of the liquid sample in a computing circuit to provide a measurement of fluid viscosity.

REFERENCES:
patent: 2966058 (1960-12-01), McSkimin
patent: 4512183 (1985-04-01), Alexander
patent: 4691714 (1987-09-01), Wong et al.

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