Procedure and apparatus for analyzing pulp slurry

Details Procedure and apparatus for analyzing pulp slurry Procedure and apparatus for analyzing pulp slurry

1988-12-28

1990-03-27

Chapman, John

Measuring and testing

Vibration

By mechanical waves

73 61R, G01N 1506, G01N 2900

Patent

active

049110136

ABSTRACT:
A procedure for analyzing air content of a liquid, e.g. pulp slurry, wherein the ratio I.sub.att /I.sub.sc between ultrasound attenuation and scattered ultrasound attenuation and/or the logarithm log (I.sub.att /I.sub.sc) is determined. The respective measuring apparatus comprises an ultrasound transmitter (1) and an ultrasound receiver (2) and a scattered ultrasound receiver (3), the latter being disposed to measure members (4) for determining the ratio I.sub.att /I.sub.sc and/or the logarithm log (I.sub.att /I.sub.sc).

REFERENCES:
patent: 2966056 (1960-12-01), Heller
patent: 3974683 (1976-08-01), Martin
patent: 4412451 (1983-11-01), Uusitalo et al.
patent: 4527420 (1985-07-01), Foote
patent: 4542644 (1985-09-01), Clayton et al.
patent: 4667515 (1987-05-01), Farren et al.

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