US 12,325,957 B2
Apparatus for and method of measuring suspension flowing in tube fractionator
Matti Törmänen, Espoo (FI)
Assigned to VALMET AUTOMATION OY, Espoo (FI)
Filed by VALMET AUTOMATION OY, Espoo (FI)
Filed on Jan. 14, 2021, as Appl. No. 17/148,822.
Claims priority of provisional application 62/960,857, filed on Jan. 14, 2020.
Prior Publication US 2021/0214893 A1, Jul. 15, 2021
Int. Cl. D21G 9/00 (2006.01); G01N 15/0205 (2024.01); G01N 15/14 (2006.01)
CPC D21G 9/0054 (2013.01) [D21G 9/0018 (2013.01); D21G 9/0027 (2013.01); G01N 15/0205 (2013.01); G01N 2015/1486 (2013.01)] 18 Claims
OG exemplary drawing
 
1. An apparatus for measuring a flowing suspension, wherein the apparatus comprises:
a radiation source configured to direct wave motion to the flowing suspension, a flow of the flowing suspension causing particles of the flowing suspension to be sorted on the basis of their sizes, the radiation source comprising an optical radiation source configured to direct optical radiation as said wave motion to the flowing suspension, the optical radiation comprising (i) at least one beam that is polarized or (ii) a plurality of beams at least one of which is polarized and at least one separate beam that is non-polarized; and
a measuring arrangement configured to measure first values of a first parameter of the wave motion interacted with the flowing suspension at a first wavelength band of the wave motion;
wherein the measuring arrangement is configured to measure second values of the at least one of following: a second parameter of the wave motion interacted with the flowing suspension, and the first parameter of the wave motion interacted with the flowing suspension at a second wavelength band of the wave motion, the measurement of the first values and the second values being synchronized with each other;
the measuring arrangement is configured to form at least one comparison, each comparison being one of the first values of the wave motion as compared to one of the second values of the wave motion; and
the measuring arrangement is configured to form a distribution which has at least one of the first values as a function of one of the comparisons.