| 摘要 |
A method for determining parameters, especially pressure, temperature, concentration, number of particles and particle size distribution, of gaseous substances present in combustion processes and other high temperature processes comprises transmitting spectrally broadband light through a measurement object 2, spectrally dividing the light transmitted through the object, and recording the spectral distribution of the light in the observed wavelength range a large number of times. Each recording takes place sequentially by the spectrally divided light being swept relative to a one-channel detector and for such a short time that the total light intensity of the entire wavelength range is constant during each recording. After that, the mean value of the recorded spectral distribution is generated, and the required parameters are calculated on the basis of this mean value spectral distribution, the appearance of the mean value spectral distribution, as well as spectra calculated or recorded for known conditions, being utilized for this calculation. An apparatus comprises means for carrying out the method. <IMAGE>
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