Measuring and testing – Gas content of a liquid or a solid – By vibration
Patent
1998-05-19
2000-01-11
Williams, Hezron
Measuring and testing
Gas content of a liquid or a solid
By vibration
324640, G01N 2900, G01R 2704
Patent
active
060123249
ABSTRACT:
The invention relates to a method for measuring gas content in a fluid, such as papermaking pulp or coating paste, and to a gas content measuring device. Pressure variations generated by a pump, for instance, are to occur in the fluid. Travel time, phase and/or attenuation of the microwave signal (20) are measured with the gas content measuring device while the signal (20) penetrates through the fluid (13), and the gas content is determined on the basis of changes in travel time, phase and/or attenuation of the microwave signal (20) caused by pressure variations of the fluid (13).
REFERENCES:
patent: 4852395 (1989-08-01), Kolpak
patent: 5502393 (1996-03-01), Yamaguchi et al.
WPI/Derwent Abstract, No. 97-499438, Week 9746 of JP 9236555.
Jakkula Pekka
Kasurinen Urpo
Niinimaki Jouko
Virkkala Rauli
Politzer Jay L.
Valmet Automation Inc.
Williams Hezron
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