Error analysis by numerical simulation for a three-color pyrometer assuming a blackbody spectrum and a wavelength and temperature dependent emissivity
Abstract
A numerical method devised to test ratio pyrometers has been used to explore the fitting of a blackbody spectrum and an emissivity model that assumes linear wavelength dependence and arbitrary temperature dependence. The slope and intercept coefficients for the emissivity and the temperature form three unknowns. The equations for the output of the three channels can be solved simultaneously for the emissivity coefficients and the temperature at any given time using the corresponding measured channel outputs. The stability of the solution is tested as a function of the temperature and equipment characteristics.
- Publication:
-
Presented at the 2nd Workshop on Subsecond Thermophysics
- Pub Date:
- May 1990
- Bibcode:
- 1990suth.workR..20G
- Keywords:
-
- Black Body Radiation;
- Computerized Simulation;
- Emissivity;
- Error Analysis;
- Pyrometers;
- Radiation Spectra;
- Temperature Dependence;
- Coefficients;
- Mathematical Models;
- Numerical Stability;
- Instrumentation and Photography