Digital speed determination in ultrasonic flow measurements

Details Digital speed determination in ultrasonic flow measurements Digital speed determination in ultrasonic flow measurements

G - Physics

01

P

G01P 5/00 (2006.01) G01F 1/66 (2006.01) G01H 17/00 (2006.01) G01P 5/24 (2006.01) G01S 7/527 (2006.01)

Patent

CA 2233974

A method and device (60) is described which measures the speed of a flowing fluid (F) by measuring the difference in time taken for an ultrasonic signal to travel first upstream and then downstream in the fluid. In each direction the device (60) calculates the time taken for an ultrasonic wave packet emitted by one ultrasonic transducer (62) to be received by another (63). The method used consists of the digitisation (85) of the received waveform and the subsequent identification of waveform features by comparison with a standard template of the waveform. The position in time of these features is then determined with respect to a high speed clock (70). The results are then used in a weighted computation to determine the time of arrival of the waveform at the transducer (63).

Cette invention concerne un procédé et un dispositif (60) de mesure de la vitesse d'écoulement (F) d'un fluide au moyen de la mesure de la différence de temps que met un signal ultrasonique pour remonter tout d'abord le fluide en direction amont puis pour le redescendre en direction aval. Le dispositif (60) calcule le temps mis, dans chaque direction, par un paquet d'ondes ultrasoniques émises par un transducteur ultrasonique (62) pour atteindre un autre transducteur (63). Le procédé utilisé consiste à numériser (85) l'onde reçue puis à identifier les caractéristiques de l'onde par comparaison avec un modèle normalisé de l'onde. On évalue ensuite la position temporelle de ces caractéristiques par rapport à une horloge rapide (70). Puis on utilise les résultats pour effectuer un calcul pondéré qui permet d'évaluer l'instant d'arrivée de l'onde au niveau du transducteur (63).

Affiliated with

Also associated with

Rating

Digital speed determination in ultrasonic flow measurements does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Digital speed determination in ultrasonic flow measurements, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital speed determination in ultrasonic flow measurements will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1596997