A system for measuring fluid flow within a conduit, such as blood flow from the heart, includes a heating element that is driven so as to apply heat to the fluid at an upstream position as a series of periodic heat signals. A temperature sensor located downstream measures a local temperature of the fluid...http://www.google.fr/patents/US5357967?utm_source=gb-gplus-shareBrevet US5357967 - Method and apparatus for measuring flow using frequency-dispersive techniques
Method and apparatus for measuring flow using frequency-dispersive techniques
