Research On Data Processing Method Of Multi-Spectral Thermometer

The research on data processing method of multi-spectral thermometry for the measurement of the true temperature and spectral emissivity of high temperature and ultrahigh temperature targets has been supported by the National Natural Science Foundation of China (No. 60377037). The research is based on brightness temperature approach method and continuous temperature measurement method. The experiment results show that the methods are effective in measuring true temperature and emissivity. The study of the project plays an important role in improving and applying the technique of radiation thermometry theory.To improve the measuring precision of true temperature and spectral emissivity, the dissertation brings forth the new ideas and work as follows:(1) A brightness temperature approach is proposed and used for the measurement of the true temperature and spectral emissivity. The model is used to process the data of multi-spectral thermometer, the simulation experiment shows that this method has higher precision on high temperature.(2) A continuous measurement method based on brightness temperature is proposed by processing the measured data of the multiwavelength pyrometer at two different times, the true temperatures and spectral emissivities at two different times can be calculated simultaneously. The experimental results show that this method improves the measurement precision of true temperature and spectral emissivity.(3) The effects of the random noise on the measured results, which are based on brightness temperature approach method and continuous measurement method, are evaluated. The experiment results demonstrate that the effect on brightness temperature approach method is uncertain and continuous measurement method can bear certain random noise.(4) The feasibility of applying of brightness temperature approach method and continuous measurement method in practical application are verified. The results of 8-wavelength thermometer, which are based on the brightness temperature model, verify that continuous measurement method based on brightness temperature is a practical data processing method when the range of target's emissivity is known. The...