Method and apparatus for measuring temperature using an optical

Details Method and apparatus for measuring temperature using an optical Method and apparatus for measuring temperature using an optical

1996-10-22

1998-03-24

Gutierrez, Diego F. F.

Thermal measuring and testing

Temperature measurement

In spaced noncontact relationship to specimen

374140, 374127, 364557, 266 99, G01K 1300, G01J 508

Patent

active

057305277

ABSTRACT:
A method and apparatus for measuring a true temperature using a consumable optical fiber, wherein received light emitted from a high temperature liquid is divided into two light beams through a branching filter. A light of a first wave band from a first light beam of the two light beams is detected by a first radiation thermometer, and the light of the first wave band is converted into temperature to output a first temperature. A light of a second wave band from a second light beam of the two light beams is detected by a second radiation thermometer, and the light of the second wave band is converted into temperature to output a second temperature. The true temperature is then calculated by using two first temperature-conversion-parameters inherent to the first radiation thermometer, a first transmission loss index in the first wave band by the first radiation thermometer, the outputted first temperature from the first radiation thermometer, two second temperature-conversion-parameters inherent to the second radiation thermometer, a second transmission loss index in the second wave band by the second radiation thermometer, the outputted second temperature from the second radiation thermometer.

REFERENCES:
patent: 4576486 (1986-03-01), Dils
Patent Abstracts of Japan, vol. 011, No. 194 (P-588), Jun. 23, 1987 & JP-A-62 019727 (Japan SENSAA Corp: KK; Others: 01), Jan. 28, 1987.
Measurements, vol. 11, No. 3, Jun. 1, 1993 pp. 211-221, XP 000396976 TSAI B K et al "Application of Dual-Wavelength Radiation Thermometry to the Aluminum Industry".

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