Thermal measuring and testing – Temperature measurement – Combined with diverse art device
Patent
1986-12-29
1988-08-16
Cuchlinski, Jr., William A.
Thermal measuring and testing
Temperature measurement
Combined with diverse art device
374127, 374128, 356 45, G01K 114, G01J 506, G01J 560
Patent
active
047640251
ABSTRACT:
A temperature detection pyrometer for determining the temperature of a turbine blade detects radiation reflected and emitted from the turbine blade. The reflected radiation is a result of flame and hot carbon particles rather than the emission representing the blade temperature. The radiation is divided into two channels, each of which detects radiation in different, but preferrably overlapping wavelength bands, to detectors providing currents proportional to the radiation intensity in the respective channel. The signal from one channel is weighted with respect to the signal from the other by a constant that is equal to the ratio of the radiation in the two channels which is the attributable to the reflected radiation. The difference between the signals, after weighting the one signal by the constant provides an output that is a function of blade temperature only so the blade temperature may be obtained from a calibration curve or a look-up table.
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Pyrometer Temperature Measurements in the Presence of Reflected Radiation by W. H. Atkinson and R. R. Strange, published 1976.
Cuchlinski Jr. William A.
Rosemount Inc.
Will Thomas B.
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