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Title: 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:
 [1];  [2]
  1. (Setauket, NY)
  2. (Westbury, NY)
Issue Date:
Research Org.:
NEW YORK STATE UNIV RES FDN
OSTI Identifier:
867268
Patent Number(s):
4899575
Assignee:
Research Foundation of State University of New York (Albany, NY) CHO
DOE Contract Number:  
FG02-86ER45237
Resource Type:
Patent
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}
}

Patent:

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