Higher-order quadrature driven diffraction grating doppler transducers
US5713362A · kind A · utility
78Cited by
3References
27Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 19, 1996 |
| Grant date | Feb 3, 1998 |
| Priority date | — |
| Expiry date | Aug 19, 2016 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/663
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A higher-order quadrature driven diffraction grating ultrasonic transducer and mode of operation, useful for determining the velocity of a fluid under investigation. The diffraction grating of the transducer is easier to fabricate compared to prior art first order quadrature driven diffraction grating ultrasonic transducers because the higher order design allows the grating to be expanded. The higher order design also eliminates the need to vary the frequency or phase of pulse generator used to drive the transducer in order to produce multiple beams needed for fluid velocity measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.