Method and apparatus for determining viscosity
Abstract
A capillary viscometer is provided which includes a fiber-optic probe and a phototransistor which produces an output signal as a liquid meniscus falls through the field of view of a detecting fiber bundle. An analog circuit is employed for receiving the signal and starting or stopping a digital counter in response thereto. The circuit includes first and second differentiators and a zero detection portion for detecting zero value outputs from the second differentiator. The counter is started or stopped upon the generation of a triggering pulse at the time such zero value is detected.
- Inventors:
- Issue Date:
- Research Org.:
- State Univ. of New York (SUNY), Albany, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 867268
- Patent Number(s):
- 4899575
- Application Number:
- 07/226,300
- Assignee:
- Research Foundation of State University of New York (Albany, NY)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- DOE Contract Number:
- FG02-86ER45237
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 1988 Jul 29
- Country of Publication:
- United States
- Language:
- English
- Subject:
- method; apparatus; determining; viscosity; capillary; viscometer; provided; fiber-optic; probe; phototransistor; produces; output; signal; liquid; meniscus; falls; field; view; detecting; fiber; bundle; analog; circuit; employed; receiving; starting; stopping; digital; counter; response; thereto; differentiators; zero; detection; portion; value; outputs; differentiator; started; stopped; generation; triggering; pulse; time; detected; liquid meniscus; output signal; optic probe; triggering pulse; analog circuit; response thereto; fiber bundle; zero value; /73/
Citation Formats
Chu, Benjamin, and Dhadwal, Harbans S. Method and apparatus for determining viscosity. United States: N. p., 1990.
Web.
Chu, Benjamin, & Dhadwal, Harbans S. Method and apparatus for determining viscosity. United States.
Chu, Benjamin, and Dhadwal, Harbans S. Mon .
"Method and apparatus for determining viscosity". United States. https://www.osti.gov/servlets/purl/867268.
@article{osti_867268,
title = {Method and apparatus for determining viscosity},
author = {Chu, Benjamin and Dhadwal, Harbans S.},
abstractNote = {A capillary viscometer is provided which includes a fiber-optic probe and a phototransistor which produces an output signal as a liquid meniscus falls through the field of view of a detecting fiber bundle. An analog circuit is employed for receiving the signal and starting or stopping a digital counter in response thereto. The circuit includes first and second differentiators and a zero detection portion for detecting zero value outputs from the second differentiator. The counter is started or stopped upon the generation of a triggering pulse at the time such zero value is detected.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1990},
month = {1}
}
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