An apparatus for noninvasively monitoring the flow and/or the composition of a flowing liquid using ultrasound is described. The position of the resonance peaks for a fluid excited by a swept-frequency ultrasonic signal have been found to change frequency both in response to a change in composition and...http://www.google.fr/patents/US6959601?utm_source=gb-gplus-shareBrevet US6959601 - Noninvasive characterization of a flowing multiphase fluid using ultrasonic interferometry
Noninvasive characterization of a flowing multiphase fluid using ultrasonic ...
