Thermal measuring and testing – Thermal calibration system
Patent
1997-01-14
1997-11-25
Gutierrez, Diego F. F.
Thermal measuring and testing
Thermal calibration system
374128, 374127, G01K 1500, G01J 500
Patent
active
056904290
ABSTRACT:
Self calibrating a pyrometer includes taking two different temperatures thereby generating two voltage spectra, calculating the spectra ratio R of the two voltage spectra, determining the slope of the plot of the logarithm of the spectrum ratio versus c.sub.2 /.lambda. to arrive at a relationship between T.sub.1 and T.sub.2, solving for T.sub.1 within the spectra ratio, and arriving at a value for T.sub.2 by substituting experimentally measured values for R into the spectra ratio equation. This method is then repeated for the determination of T.sub.2. The pyrometer calibration constant h.sub..lambda. can then be determined by dividing the measured voltage spectra by the planck function at the known temperature (i.e., T.sub.1 or T.sub.2). Measurement of subsequent temperatures can now be determined by measuring the voltage spectra and dividing by the calibration constant h.sub..lambda. which will result in a planck function L.sub..lambda. (T) which can be solved to yield the surface temperature.
REFERENCES:
patent: 3454769 (1969-07-01), Dynes
patent: 3795918 (1974-03-01), Sunderland
patent: 4659234 (1987-04-01), Brouwer et al.
patent: 4764025 (1988-08-01), Jensen
patent: 4880314 (1989-11-01), Kienitz
"Bristol-Velotron two color (ratio) Radiation Pyrometer," The Bristol Company, Bulletin P-1299, Waterbury, CT (Sep. 1965).
Hishikari, I., "Two-color pyrometers achieve impossible results," JEE (Japan), No. 130, pp. 42-45 (Oct. 1977).
Ruffino, G. et al., "A new infrared photoelectric pyrometer," High Temperatures-High Pressures, vol. 2, No. 2, pp. 227-235 (1970).
McGee, T., "Principles And Methods Of Temperature Measurement", published by John Wiley & Sons, pp. 370-371 (1988).
Gutierrez Diego F. F.
Reinecke Susan D.
Stone Kent N.
LandOfFree
Method and apparatus for emissivity independent self-calibrating does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for emissivity independent self-calibrating, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for emissivity independent self-calibrating will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2101468