The non-contact temperature measurement method has been widely used in the field of temperature measurement. Based on element energy spectrum excitation and Laser induced breakdown spectroscopy (LIBS) mechanism, through the analysis of the intrinsic physical properties of the object under test, the excitation characteristic spectrum of heated internal elements in high temperature field was explored, in order to select effective detection wavelength of non-contact detection module, and designed a narrow-band filter module to compress the detection band. The accuracy of optical detection model can be improved. By preparing and analyzing samples of various elements, K and Cu were selected as external doping elements, the characteristic wavelength of K and Cu can be used as an effective detection wavelength, the CMOS camera was used to detect the burner flame under the different wavelengths and obtained the flame image. The experimental results validate the feasibility of the method.
|