Method and device for on-line acoustic monitoring of foam...

G - Physics – 01 – N

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G01N 29/024 (2006.01) E21B 33/13 (2006.01) E21B 43/26 (2006.01) G01N 29/275 (2006.01)

Patent

CA 2615183

A method for on-line acoustic detection of the quality of foams and aerated fluids whereby at least one emitter/receiver pair is placed in a close vicinity to the foam flow. At least one acoustic pulse is emitted and the time within which the acoustic pulse overcomes the way from the emitter to the receiver is recorded. Sound speed in the foam is determined by analyzing an acoustic response of the receiver. Pressure in the foam in the area between the emitter and receiver is measured and foam quality is calculated in accordance with respective equation.

Il s'agit d'une méthode de détection acoustique en ligne de la qualité des mousses et des liquides aérés au moyen de laquelle au moins une paire émetteur-récepteur est placée proche du débit de mousse. Au moins une impulsion acoustique est émise à la fois, et la durée au cours de laquelle l'impulsion acoustique franchit la voie comprise de l'émetteur au récepteur est enregistrée. La vitesse du son dans la mousse est déterminée par l'analyse d'une réponse acoustique du récepteur. La pression dans la mousse qui occupe la zone entre l'émetteur et le récepteur est mesurée, et la qualité de la mousse est calculée conformément à l'équation correspondante.

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