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Title: Apparatus for accurately measuring high temperatures

Abstract

The present invention is a thermometer used for measuring furnace temperaes in the range of about 1800.degree. to 2700.degree. C. The thermometer comprises a broadband multicolor thermal radiation sensor positioned to be in optical alignment with the end of a blackbody sight tube extending into the furnace. A valve-shutter arrangement is positioned between the radiation sensor and the sight tube and a chamber for containing a charge of high pressure gas is positioned between the valve-shutter arrangement and the radiation sensor. A momentary opening of the valve shutter arrangement allows a pulse of the high gas to purge the sight tube of air-borne thermal radiation contaminants which permits the radiation sensor to accurately measure the thermal radiation emanating from the end of the sight tube.

Inventors:
 [1]
  1. (Knoxville, TN)
Issue Date:
Research Org.:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN
OSTI Identifier:
865490
Patent Number(s):
4525080
Assignee:
United States of America as represented by Department of Energy (Washington, DC) ORNL
DOE Contract Number:  
W-7405-ENG-26
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
apparatus; accurately; measuring; temperatures; thermometer; furnace; temperaes; range; 1800; degree; 2700; comprises; broadband; multicolor; thermal; radiation; sensor; positioned; optical; alignment; blackbody; sight; tube; extending; valve-shutter; arrangement; chamber; containing; charge; pressure; gas; momentary; valve; shutter; allows; pulse; purge; air-borne; contaminants; permits; measure; emanating; radiation sensor; optical alignment; thermal radiation; pressure gas; accurately measuring; radiation emanating; tube extending; sensor positioned; accurately measure; shutter arrangement; /374/

Citation Formats

Smith, Douglas D. Apparatus for accurately measuring high temperatures. United States: N. p., 1985. Web.
Smith, Douglas D. Apparatus for accurately measuring high temperatures. United States.
Smith, Douglas D. Tue . "Apparatus for accurately measuring high temperatures". United States. https://www.osti.gov/servlets/purl/865490.
@article{osti_865490,
title = {Apparatus for accurately measuring high temperatures},
author = {Smith, Douglas D.},
abstractNote = {The present invention is a thermometer used for measuring furnace temperaes in the range of about 1800.degree. to 2700.degree. C. The thermometer comprises a broadband multicolor thermal radiation sensor positioned to be in optical alignment with the end of a blackbody sight tube extending into the furnace. A valve-shutter arrangement is positioned between the radiation sensor and the sight tube and a chamber for containing a charge of high pressure gas is positioned between the valve-shutter arrangement and the radiation sensor. A momentary opening of the valve shutter arrangement allows a pulse of the high gas to purge the sight tube of air-borne thermal radiation contaminants which permits the radiation sensor to accurately measure the thermal radiation emanating from the end of the sight tube.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1985},
month = {1}
}

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