Patent ID: 6318891
Filing Date: 2001-11-20
Classification: G01J

Abstract:
A temperature measurement method for determining the adiabatic temperature of a flame, the chemiluminescence radiation from the flame, emitted by OH radicals and CH radicals, being detected using a spectrograph via an optical sensor fiber, wherein a spectrally resolved raw signal of the chemiluminescence radiation is subjected to a correction, the method comprising the steps of:comparing the spectrum of the corrected chemiluminescence radiation with a multiplicity of theoretically determined emission spectra, until a theoretical emission spectrum coincides with the corrected chemiluminescence spectrum, wherein each of the theoretically determined emission spectra is given by superposing a multiplicity of spectral lines;the coinciding emission spectrum delivering a Boltzmann temperature which is associated with it and is assigned to the chemiluminescence spectrum; andderiving the adiabatic flame temperature from the Boltzmann temperature by means of correlation.