Increased sensitivity coriolis effect flowmeter using nodal-proximate sensors
US5497666A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 20, 1994 |
| Grant date | Mar 12, 1996 |
| Priority date | — |
| Expiry date | Jul 20, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F1/849
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An increased sensitivity Coriolis flowmeter having one or more drivers oscillates a flow tube, or tubes, at pre-determined frequencies thereby producing active and/or static nodes at points along the flowtube(s). The increased sensitivity of the present flowmeter is provided by controllably locating sensors in close proximity to the static nodes and/or active nodes. In a first embodiment, the flowtubes are oscillated in a manner generating a single active node with sensors positioned in close proximity to, and on opposing sides of, the active node. In a second embodiment, the flowtubes are oscillated in a manner generating multiple active nodes where the sensors are located on opposing sides of each active node, or on opposing flowtubes where one sensor is above an active node on one leg and a second sensor below the active node on the opposing leg. In another embodiment, sensors are positioned in close proximity to static nodes in addition to the sensor positions for active nodes as previously stated. In all embodiments, the sensors are controllably positioned proximate to active nodes and/or static nodes in a manner that maximizes the signal to noise ratio of the signal generated…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.