Ultrasonic flowmeter
US4483202A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 1983 |
| Grant date | Nov 20, 1984 |
| Priority date | — |
| Expiry date | Mar 29, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/667
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic flowmeter for measuring a flow rate in a conduit. A pair of ultrasonic transducers are disposed in a conduit so as to oppose each other such that a line connecting the pair of transducers is inclined by a predetermined angle with respect to a fluid flowing direction. The ultrasonic flowmeter includes: driving means for simultaneously driving the pair of ultrasonic transducers; means for measuring the primary time difference between a time when one ultrasonic transducer receives an ultrasonic wave which is radiated from the other ultrasonic transducer and a time when the other transducer receives an ultrasonic wave which is radiated from the first ultrasonic transducer. Additionally, a time difference between the time measured when one ultrasonic transducer receives an ultrasonic wave radiated from one ultrasonic transducer and reflected by the other ultrasonic transducer and a time measured when the other ultrasonic transducer receives an ultrasonic wave radiated from the other ultrasonic transducer and reflected by one ultrasonic transducer. Primary and secondary time difference data is produced by adding signs in accordance with the arrival order of the ultrasonic w…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.