Bi-directional pressure sensing probe
US4957007A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 12, 1989 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Apr 12, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/46
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A pressure sensing probe 10 includes an elliposoidally shaped symmetric probe body 12 with fluid orifices 14 and 16 facing into and away from the flow. The orifices 14 and 16 facing in opposite directions allows direction of flow to be detected along with pressure magnitude. The symmetric body shape allows the probe 10 to operate satisfactorily with some misalignment with respect to the flow direction 32 but perpendicularity between orifices 14 and 16 and the flow direction 32 is preferred. The body 12 is ellipsoidally shaped to maximize the difference in pressure between the two orifices 14 and 16 and is held away from pipe wall turbulence by a symmetric stem 18. The ellipsoidal shape of the body 12 and stem 18 are also designed to minimize turbulence in the fluid created by the probe 10. The length to diameter ratio of the ellipsoidal shape of the probe body 12 changes depending upon fluid density and flow speed and the desires to maximize the pressure signal while minimizing flow disturbance. As the length to diameter ratio is minimized the differential pressure sensed is maximized and as the ratio is maximized flow disturbance is minimized. The orifices 14 and 16 communicate wi…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.