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Title: Method and apparatus for optical temperature measurement

Abstract

A temperature probe and a method for using said probe for temperature measurements based on changes in light absorption by the probe. The probe comprises a first and a second optical fiber that carry light to and from the probe, and a temperature sensor material, the absorbance of which changes with temperature, through which the light is directed. Light is directed through the first optical fiber, passes through the temperature sensor material, and is transmitted by a second optical fiber from the material to a detector. Temperature-dependent and temperature-independent factors are derived from measurements of the transmitted light intensity. For each sensor material, the temperature T is a function of the ratio, R, of these factors. The temperature function f(R) is found by applying standard data analysis techniques to plots of T versus R at a series of known temperatures. For a sensor having a known temperature function f(R) and known characteristic and temperature-dependent factors, the temperature can be computed from a measurement of R. Suitable sensor materials include neodymium-doped boresilicate glass, accurate to .+-.0.5.degree. C. over an operating temperature range of about -196.degree. C. to 400.degree. C.; and a mixture of D.sub.2 O and H.sub.2 O, accurate to .+-.0.1.degree.more » C. over an operating range of about 5.degree. C. to 90.degree. C.« less

Inventors:
 [1];  [2];  [3]
  1. (Martinez, GA)
  2. (Aiken, SC)
  3. (Augusta, GA)
Issue Date:
Research Org.:
WESTINGHOUSE SAVANNAH RIVER CO
OSTI Identifier:
869502
Patent Number(s):
5348396
Assignee:
United States of America as represented by United States (Washington, DC) SRS
DOE Contract Number:  
AC09-89SR18035
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
method; apparatus; optical; temperature; measurement; probe; measurements; based; changes; light; absorption; comprises; fiber; carry; sensor; material; absorbance; directed; passes; transmitted; detector; temperature-dependent; temperature-independent; factors; derived; intensity; function; ratio; found; applying; standard; data; analysis; techniques; plots; versus; series; temperatures; characteristic; computed; suitable; materials; neodymium-doped; boresilicate; glass; accurate; degree; operating; range; -196; 400; mixture; 90; analysis techniques; operating range; transmitted light; data analysis; temperature probe; temperature measurements; temperature range; optical fiber; operating temperature; light intensity; temperature sensor; optical temperature; silicate glass; light absorption; temperature measurement; probe comprises; analysis technique; temperature measure; /374/702/

Citation Formats

O'Rourke, Patrick E., Livingston, Ronald R., and Prather, William S. Method and apparatus for optical temperature measurement. United States: N. p., 1994. Web.
O'Rourke, Patrick E., Livingston, Ronald R., & Prather, William S. Method and apparatus for optical temperature measurement. United States.
O'Rourke, Patrick E., Livingston, Ronald R., and Prather, William S. Sat . "Method and apparatus for optical temperature measurement". United States. https://www.osti.gov/servlets/purl/869502.
@article{osti_869502,
title = {Method and apparatus for optical temperature measurement},
author = {O'Rourke, Patrick E. and Livingston, Ronald R. and Prather, William S.},
abstractNote = {A temperature probe and a method for using said probe for temperature measurements based on changes in light absorption by the probe. The probe comprises a first and a second optical fiber that carry light to and from the probe, and a temperature sensor material, the absorbance of which changes with temperature, through which the light is directed. Light is directed through the first optical fiber, passes through the temperature sensor material, and is transmitted by a second optical fiber from the material to a detector. Temperature-dependent and temperature-independent factors are derived from measurements of the transmitted light intensity. For each sensor material, the temperature T is a function of the ratio, R, of these factors. The temperature function f(R) is found by applying standard data analysis techniques to plots of T versus R at a series of known temperatures. For a sensor having a known temperature function f(R) and known characteristic and temperature-dependent factors, the temperature can be computed from a measurement of R. Suitable sensor materials include neodymium-doped boresilicate glass, accurate to .+-.0.5.degree. C. over an operating temperature range of about -196.degree. C. to 400.degree. C.; and a mixture of D.sub.2 O and H.sub.2 O, accurate to .+-.0.1.degree. C. over an operating range of about 5.degree. C. to 90.degree. C.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

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