Patent ID: 6151558
Filing Date: 2000-11-21
Classification: G01F,G01P

Abstract:
In a fluid flow measurement system including at least two spaced apart electro-acoustic transducing means, a process for determining ultrasonic signal transit times along a bi-directional signal propagation path between the transducing means, including the steps of:a) causing a first one of the transducing means to generate a continuous wave acoustic signal in a first direction and receiving the continuous wave acoustic signal at the second transducing means;b) causing the second transducing means to generate the continuous wave acoustic signal in a second direction opposite to the first direction, and receiving the continuous wave acoustic signal at the first transducing means; andc) determining respective signal transit times corresponding to propagation between the transmission means in the first and second directions based on synchronously sampling the received continuous wave and determining a transit time based upon direct inverse function computation of the samples.