Piezoelectric pressure frequency sensor
US4559832A · kind A · utility
22Cited by
18References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 23, 1983 |
| Grant date | Dec 24, 1985 |
| Priority date | — |
| Expiry date | Sep 23, 2003 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S73/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A piezoelectric fluid pressure fluctuation frequency sensor, preferably for a vortex-shedding flowmeter. A piezoelectric transducer is located in a sensor chamber between and in physical contact with a diaphragm and a chamber surface. Pressure fluctuations in a von Karman vortex street outside the diaphragm compress the transducer, between the diaphragm and the chamber surface. The transducer generates a responsive electrical signal which is representative of the pressure fluctuations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.