Method for quantifying varying propagation characteristics of normal incident ultrasonic signals as used in correlation based flow measurement
US7831398B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 19, 2008 |
| Grant date | Nov 9, 2010 |
| Priority date | — |
| Expiry date | Dec 19, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/7082
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
According to the present invention, a method is provided for sensing a fluid flow within a pipe having a lengthwise axis to determine a parameter of the fluid flow. The method includes the following steps: a) providing an array of more than two ultrasonic sensors, each sensor having a transmitter and a receiver; b) disposing the transmitter and receiver of each sensor orthogonally relative to the lengthwise axis of the pipe; c) receiving ultrasonic signals using the receivers, which received signals result from initial signals transmitted from the transmitters of the ultrasonic sensors; d) processing the received signals from each sensor by projecting the received signals against a sine function and a cosine function, high pass filtering the projected signals, and using the high pass filtered projections to create an arrival vector within a complex plane, wherein the high pass filtered arrival vector is a rectified frequency doubled signal; and e) determining the parameter of the fluid flow using the arrival vector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.