Evaluating and Correcting Laser Diffraction Particle Size Measurement Errors at Different Obscurations
Multiple scattering effects can result in an underestimation of the particle size.To investigate the light scattering characteristics of high-obscuration particles,a Monte Carlo method-based Mie model has been developed.A constructed system was utilized to conduct a series of experiments on two standard particles at different concentrations,measuring both scattered light energy distribution and obscuration simultaneously.The results show that the Monte Carlo model agrees well with the traditional model.When multiple scattering was taken into account,as the obscuration increased,the scattered light energy curves gradually shifted,and the inversion error gradually became larger.For an obscuration range of 0.15～0.20,the inversion error is within 5％.However,for an obscuration range of 0.55～0.60,the inversion error escalated beyond 13％.Moreover,by utilizing inversion correction on experimental spectra for 2.6 μm,the error was successfully reduced to≤3％.The model allows for the accurate inversion of particle size in the presence of high obscuration.
万方数据
维普
