Self-calibrated active pyrometer for furnace temperature measure

Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

374128, 374131, 374 9, 374130, 374122, G01J 508, G01J 562

Patent

active

057854262

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.

REFERENCES:
patent: 4235107 (1980-11-01), Ludeke et al.
patent: 4292638 (1981-09-01), Lazarchik et al.
patent: 4568199 (1986-02-01), Schmidt
patent: 4568200 (1986-02-01), Hatono et al.
patent: 4673298 (1987-06-01), Hunter et al.
patent: 4708493 (1987-11-01), Stein
patent: 4919542 (1990-04-01), Nulman et al.
patent: 4956538 (1990-09-01), Moslehi
patent: 4979133 (1990-12-01), Arima et al.
patent: 4979134 (1990-12-01), Arima et al.
patent: 4984902 (1991-01-01), Crowley
patent: 5029117 (1991-07-01), Patton
patent: 5036289 (1991-07-01), Duran
patent: 5255286 (1993-10-01), Moslehi et al.
patent: 5305416 (1994-04-01), Fiory
patent: 5308161 (1994-05-01), Stein
patent: 5326173 (1994-07-01), Evans et al.
patent: 5573339 (1996-11-01), Woskov et al.
H.R. Fetterman et al., Far-ir Heterodyne Radiometeric Measurements with Quasioptical Schottky Diode Mixers, Appl. Phys. Lett., vol. 33, pp. 151-154 (1978).
F.P. Incropera et al., "Introduction to Heat Transer", 2nd Ed., pp. 677-707, John Wiley and Sons, New York (1990).
J.D. Kraus, Radio Astronomy, pp. 238-285 by M.E. Tiuri, Radio-Telescope Receivers, McGraw Hill, New York (1975).
Ma et al., "Night Moth Eye Window for the Millimeter and Sub-Millimetre Wave Region", Optica Acta, vol. 30, No. 12, pp. 1685-1695 (1983).
J.H. Rainwater, Radiometers: Electronic Eyes that See Noise, Microwaves, pp. 58-62 (Sep. 1978).
Richard et al., "Mesure de temperature par radiometrie hertzienne, Mesures Regulation Automatisme", vol. 9 (Sep. 1964).
Thumm, Computer-Aided Analysis and Design of Corrugated TE.sub.11 to HE.sub.11 Mode Converters in Highly Overmoded Waveguides, Intern. J. of Infrared and Millimeter Waves, vol. 6, pp. 577-597 (1985).
Wilson et al., The Optical Properties of Moth Eye Antireflection Surfaces, Optica Acta, vol. 29, pp. 993-1009 (1982).

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Self-calibrated active pyrometer for furnace temperature measure does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-calibrated active pyrometer for furnace temperature measure, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-calibrated active pyrometer for furnace temperature measure will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-17384

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.