Fig. 1. Measurement principle diagram of transmission fluctuation correlation spectrometry

Fig. 2. Experimental setup. (a) Schematic of experimental setup; (b) photo of experimental setup

Fig. 3. Correlation spectra of glass beads with nominal size of 700 μm. (a) Cross-correlation spectrum of transmission fluctuation; (b) auto-correlation spectrum of transmission fluctuation

Fig. 4. Chart of modified Chahine iterative algorithm

Fig. 5. Inversion results of particle size distributions for variant volume fraction. (a) Glass bead with 200 μm nominal diameter; (b) glass bead with 400 μm nominal diameter; (c) glass bead with 500 μm nominal diameter; (d) glass bead with 700 μm nominal diameter; (e) silica sand with 200 μm nominal diameter; (f) white corundum with 600 μm nominal diameter

Fig. 6. Measurement results of particle volume fraction. (a) Spherical glass bead；(b) non-spherical silica sand and white corundum

Fig. 7. Schematic of feeding with vibration feeder and measurement

Fig. 8. Inversely calculated particle size cumulative distributions under the condition of feeding with vibration feeder. (a) Glass bead with 400 μm nominal diameter; (b) glass bead with 500 μm nominal diameter; (c) glass bead with 900 μm nominal diameter; (d) white corundum with 600 μm nominal diameter

Table 1. Measurement results of particle velocity in circulating disperser

Table 2. Characteristic particle size x₁₀，x₅₀ and x₉₀ measured with transmission fluctuation correlation spectrometry

Table 3. Characteristic particle size x₁₀、x₅₀ and x₉₀ measured using Bettersize2600

Table 4. Measurement results on particle velocity under the condition of feeding with vibration feeder

Table 5. Average characteristic particle size x₁₀, x₅₀ and x₉₀ under the condition of feeding with vibration feeder