Flow meter and method of calibrating same
US5798466A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 8, 1997 |
| Grant date | Aug 25, 1998 |
| Priority date | — |
| Expiry date | Jan 8, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05D7/0605
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
By a load detector, a magnitude of a dynamic load, depending on a downward-flow impact of a particulate material flowing through a flow passage, is measured, and also a magnitude of a static load, corresponding to a total amount of the particulate material flown through a predetermined position for a predetermined time period, is measured. A value of a dynamic load-type flow rate of the particulate material, corresponding to a measured value of the dynamic load, is calculated from the measured value of the dynamic load by a first calculation formula, and also a value of an actual flow rate of the particulate material is calculated from a measured value of the static load during the predetermined time period by a second calculation formula. A correction factor for bringing the dynamic load-type flow rate value, depending on the difference of the particulate materials, into agreement with the actual flow rate value is found. The first calculation formula is corrected by the correction factor, and a corrected dynamic load-type flow rate value is calculated from the measured dynamic load value by the use of the corrected first calculation formula. With this construction, there can be o…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.