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Title: Self-calibrated active pyrometer for furnace temperature measurements

Abstract

Pyrometer with a probe beam superimposed on its field-of-view for furnace temperature measurements. The pyrometer includes a heterodyne millimeter/sub-millimeter-wave or microwave receiver including a millimeter/sub-millimeter-wave or microwave source for probing. The receiver is adapted to receive radiation from a surface whose temperature is to be measured. The radiation includes a surface emission portion and a surface reflection portion which includes the probe beam energy reflected from the surface. The surface emission portion is related to the surface temperature and the surface reflection portion is related to the emissivity of the surface. The simultaneous measurement of surface emissivity serves as a real time calibration of the temperature measurement. In an alternative embodiment, a translatable base plate and a visible laser beam allow slow mapping out of interference patterns and obtaining peak values therefor. The invention also includes a waveguide having a replaceable end portion, an insulating refractory sleeve and/or a source of inert gas flow. The pyrometer may be used in conjunction with a waveguide to form a system for temperature measurements in a furnace. The system may employ a chopper or alternatively, be constructed without a chopper. The system may also include an auxiliary reflector for surface emissivity measurements.

Inventors:
 [1];  [2];  [3];  [4]
  1. (Bedford, MA)
  2. (Chestnuthill, MA)
  3. (Newtown Square, PA)
  4. (Kennewick, WA)
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA
OSTI Identifier:
871735
Patent Number(s):
US 5785426
Assignee:
Massachusetts Institute of Technology (Cambridge, MA); Battelle Memorial Institute (Richland, WA) PNNL
DOE Contract Number:
AC06-76RL01830
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
self-calibrated; active; pyrometer; furnace; temperature; measurements; probe; beam; superimposed; field-of-view; heterodyne; millimeter; sub-millimeter-wave; microwave; receiver; including; source; probing; adapted; receive; radiation; surface; measured; emission; portion; reflection; energy; reflected; related; emissivity; simultaneous; measurement; serves; time; calibration; alternative; embodiment; translatable; base; plate; visible; laser; allow; slow; mapping; interference; patterns; obtaining; peak; values; waveguide; replaceable; insulating; refractory; sleeve; inert; gas; flow; conjunction; form; employ; chopper; alternatively; constructed; auxiliary; reflector; simultaneous measurement; insulating refractory; microwave source; furnace temperature; receive radiation; surface emissivity; visible laser; interference pattern; base plate; probe beam; temperature measurements; gas flow; laser beam; inert gas; beam energy; alternative embodiment; peak value; energy reflected; surface temperature; temperature measurement; interference patterns; heterodyne millimeter; temperature measure; beam superimposed; /374/

Citation Formats

Woskov, Paul P., Cohn, Daniel R., Titus, Charles H., and Surma, Jeffrey E.. Self-calibrated active pyrometer for furnace temperature measurements. United States: N. p., 1998. Web.
Woskov, Paul P., Cohn, Daniel R., Titus, Charles H., & Surma, Jeffrey E.. Self-calibrated active pyrometer for furnace temperature measurements. United States.
Woskov, Paul P., Cohn, Daniel R., Titus, Charles H., and Surma, Jeffrey E.. Thu . "Self-calibrated active pyrometer for furnace temperature measurements". United States. doi:. https://www.osti.gov/servlets/purl/871735.
@article{osti_871735,
title = {Self-calibrated active pyrometer for furnace temperature measurements},
author = {Woskov, Paul P. and Cohn, Daniel R. and Titus, Charles H. and Surma, Jeffrey E.},
abstractNote = {Pyrometer with a probe beam superimposed on its field-of-view for furnace temperature measurements. The pyrometer includes a heterodyne millimeter/sub-millimeter-wave or microwave receiver including a millimeter/sub-millimeter-wave or microwave source for probing. The receiver is adapted to receive radiation from a surface whose temperature is to be measured. The radiation includes a surface emission portion and a surface reflection portion which includes the probe beam energy reflected from the surface. The surface emission portion is related to the surface temperature and the surface reflection portion is related to the emissivity of the surface. The simultaneous measurement of surface emissivity serves as a real time calibration of the temperature measurement. In an alternative embodiment, a translatable base plate and a visible laser beam allow slow mapping out of interference patterns and obtaining peak values therefor. The invention also includes a waveguide having a replaceable end portion, an insulating refractory sleeve and/or a source of inert gas flow. The pyrometer may be used in conjunction with a waveguide to form a system for temperature measurements in a furnace. The system may employ a chopper or alternatively, be constructed without a chopper. The system may also include an auxiliary reflector for surface emissivity measurements.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}

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