Method and apparatus to define the velocity of a flowing liquid

Details Method and apparatus to define the velocity of a flowing liquid Method and apparatus to define the velocity of a flowing liquid

G - Physics

01

F

G01F 1/66 (2006.01) G01F 1/68 (2006.01)

Patent

CA 2704822

In order to determine the through put of a fluid flow in a pipe with a minimum of technical and particularly equipment expense, the invention proposes a method and a device for determining the throughput of a fluid flow, wherein the method provides for the fluid to be heated by means of an optical heating beam and for the heating site to be irradiated by an optical detection beam, wherein the optical axes of the heating and detection beams correspond at least at the heating site, and the detection beam is recorded by a detector array; and the device is designed such that the unit for heating an inner region of an adjacent inner region of the fluid and an optical arrangement guiding the beam of the laser are disposed such that a measurement beam passes through the heated region at the absolute location of the heating thereof.

Pour déterminer avec une haute précision et une mise en oeuvre technique minimale, et en particulier une mise en oeuvre minimale d'appareils, le débit d'écoulement d'un liquide dans un tube, l'invention propose un procédé et un dispositif de détermination du débit d'un écoulement de liquide, le procédé prévoyant de chauffer le liquide au moyen d'un faisceau optique de chauffage, de faire traverser l'emplacement chauffé par un faisceau optique de détection, les axes optiques du faisceau de chauffage et du faisceau de détection coïncidant au moins sur le site du chauffage et le faisceau de détection étant enregistré au moyen d'une batterie de détecteurs, le dispositif étant configuré de telle sorte que le système qui chauffe une partie intérieure délimitée du liquide et un ensemble optique qui guide le faisceau du laser sont disposés de telle sorte qu'un faisceau de mesure traverse la partie chauffée à l'emplacement exact de son chauffage.

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