FLUID SPEED MEASURING SYSTEM

摘要

The present invention relates to fluid speed discharge measuring devices comprising an oblique path terminated by two transducers and along which ultrasonic waves are propagated in opposite directions. The velocity of the fluid is determined as a function of the repetition frequencies of wave packets circulating from one transducer to the other and vice versa and also by taking into account the differential time delay obtained from phase shift measurement made at the carrier frequency of the wave packets.