Digital speed determination in ultrasonic flow measurements
US6305233A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Jul 6, 1998 |
| Grant date | Oct 23, 2001 |
| Priority date | — |
| Expiry date | Jul 6, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/527
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
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).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.