Method and apparatus for determining the flow velocity of a molten, radiation-emitting material
US4517845A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 2, 1983 |
| Grant date | May 21, 1985 |
| Priority date | — |
| Expiry date | Jun 2, 2003 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P5/18
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and an apparatus for measuring the flow velocity of a flow, stream or jet of molten radiation emitting material, in particular a freely falling jet of molten glass. The intensity of the radiation emitted from a limited section of the material flow is detected by means of two radiation detectors at two separate locations mutually spaced apart by a predetermined distance along the flow path of the material flow. From the output signals of the two radiation detectors all pulse-like amplitude variations having an amplitude exceeding a predetermined magnitude are discriminated. These pulse-like amplitude variations originate from randomly occurring, local, descrete, short variations in the intensity of the radiation emitted by the material flow caused by randomly occurring inhomogeneities in the material, for instance in the form of air bubbles in a jet of molten glass. The time interval between a pulse-like amplitude variation in the output signal from the upstream detector caused by an inhomogeneity in the material flow and the occurrence of a pulse-like amplitude variation in the output signal from the down-stream detector, which has been caused by the same inhomogeneity in …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.