G - Physics – 01 – N
Patent
G - Physics
01
N
73/59
G01N 21/01 (2006.01) G01N 21/53 (2006.01)
Patent
CA 1058418
ABSTRACT OF THE DISCLOSURE A meter for measuring the brightness and/or consistency of pulp slurry. An optical probe introduces light energy into the slurry, which energy is transmitted and back-scattered, and reflected orthogonally. Three signals are provided which correspond to the back-scattered, reflected, and transmitted energy. Each of the signals is ratioed against a reference signal which corresponds to the intensity of the energy introduced into the slurry to provide three outputs proportional to the difference between the reference signal and the received signals. The output corresponding to the back- scattered energy is multiplied by the log of the output corre- sponding to the transmitted energy to produce a measurement of brightness independent of consistency. The output corre- sponding to the back-scattered energy is divided by the log of the output corresponding to the reflected energy to produce a measurement of consistency which is independent of the pulp brightness.
257566
Collins D. Stephen
Peoples Patrick J.
Villaume Henry F.
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