Fluid property detection system

Details Fluid property detection system Fluid property detection system

1975-08-05

1977-02-01

Queisser, Richard C.

Measuring and testing

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

Viscosity

G01N 1116

Patent

active

040055990

ABSTRACT:
Apparatus for detecting the magnitude of a property of a fluid including a body mounted on a torsion spring that is oscillated by a feedback of alternately an in-phase and an out-of-phase signal from an amplifier having a gain adequate to sustain the oscillations. If the in-phase signal has a frequency directly proportional to f.sub.n and the out-of-phase signal has a frequency directly proportional to f.sub.h, then the magnitude of the property p is determined by the digital computation of ##EQU1## where K and B are constants. The property p may be any one of several properties including but not limited to viscosity.

REFERENCES:
patent: 2607217 (1952-08-01), Merten et al.
patent: 3181348 (1965-05-01), Lewis
patent: 3710614 (1973-01-01), Opplinger
patent: 3712117 (1973-01-01), Fitzgerald et al.

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