High resolution flow meter
US5184519A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 18, 1990 |
| Grant date | Feb 9, 1993 |
| Priority date | — |
| Expiry date | Oct 18, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01F15/068
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An improved resolution positive displacement flow meter of the type having a pair of meshed gears. A plurality of sensors are spaced to detect movement of the gear teeth as liquid flows through the flow meter. Where the gears each have n teeth and s sensors are used, the possible locations around the gear for each sensor relative to a reference point are determined by the formula ##EQU1## where K=0,1,2, . . . ,(s-1) and L=0,1,2, . . . ,(n-1). The outputs from the sensors are logically combined, for example, by an exclusive OR circuit or by an OR circuit, to produce s pulses each time the gear rotates through the angle between two adjacent gear teeth.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.