Orifice measuring device
US5086655A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 12, 1990 |
| Grant date | Feb 11, 1992 |
| Priority date | — |
| Expiry date | Oct 12, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/42
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention relates to a plate orifice for a or in a measuring device for he flow metering of fluid streams, in particular gas streams, preferably for gas streams present in internal combustion engines, with the fluids, in particular the gases, being guided through at least one plate orifice (restrictor) disposed in a pipe and provided with a sharp edge definig its flow orifice, with a pressure sensor or a pressure measuring line of a differential pressure measuring device or of a differential pressure transducer disposed upstream as well as downstream of the plate orifice, the output signal of the differential pressure measuring device or the differential pressure transducer depending on the differential pressure forming the measuring signal for the fluid flow rate, in particular gas flow rate, through the plate orifice and optionally being fed to an evaluation unit. In plate orifices or measuring devices of this type, problems due to their contamination and their universal usability arise. These problems were overcome according to the invention by providing, in particular for the flow measurements of pulsating fluid streams, preferably gas streams, that the plate orifice is sym…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.