Diffracting doppler-transducer
US5540230A · kind A · utility
98Cited by
6References
13Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 1994 |
| Grant date | Jul 30, 1996 |
| Priority date | — |
| Expiry date | Oct 24, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/5209
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An ultrasonic transducer apparatus of variable frequency including a diffracting structure adapted for emitting and receiving a plurality of diffracted ultrasonic beams of calculable different angles for determining the velocity of a fluid flowing through a lumen, and flow volume. Velocity and flow volume are determined from at least two equations in the two unknowns of the velocity, and the angle between the ultrasonic transducer apparatus and the direction of the fluid flow, and from a determination of the diameter of the lumen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.