Apparatus and method for determining displacer position in a flowmeter prover
US8783088B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 21, 2011 |
| Grant date | Jul 22, 2014 |
| Priority date | — |
| Expiry date | Aug 10, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F25/11
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Apparatus and methods for proving a flowmeter. In one embodiment, a flowmeter prover includes a flow tube, a displacer, and a signal analyzer. The displacer is moveable in a flow passage of the flow tube. A magnetic target is disposed on the displacer. One or more inductive transducers are disposed on the flow tube and configured to detect the magnetic target as the displacer moves in the flow tube. The signal analyzer is configured to detect a maximum slope of rising and falling edges of a signal generated by the transducer responsive to the magnetic target traversing the transducer. The signal analyzer is further configured to determine displacer velocity based on the detected maximum slope.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.