Thermal measuring and testing – Temperature measurement – In spaced noncontact relationship to specimen
Patent
1990-12-07
1992-11-24
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
In spaced noncontact relationship to specimen
374129, 374127, 374126, 2503381, G01J 562, G01J 560, G01J, G01J 510
Patent
active
051657961
ABSTRACT:
Apparatus for optically determining the temperature of an object in an environment at elevated temperature provides enhanced measurement accuracy by sensing radiation from the object in two or more different wavebands of radiation. The information derived therefrom is cyclically sampled and processed to provide corrected emissivity of the object. The temperature of the object is accurately determined from the corrected emissivity and sensed radiation therefrom. The apparatus includes a radiation detector for receiving radiation during an interval, an optical filter structure with a plurality of optical filters of different radiation transmissive characteristics, and sampling circuits for receiving the radiation signal from the detector during a selected period within the interval during which radiation is supplied to the detector; wherein the selected period is shorter than the interval, is determined in response to the cyclic operation of the filter structure, and contains the least amlitude gradient.
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French Michael
Gat Arnon
AG Processing Technologies, Inc.
Cuchlinski Jr. William A.
Gutierrez Diego F. F.
Smith A. C.
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