Process and device for monitoring by periodic excitation a flow of particles in a pipe
US5639667A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 21, 1995 |
| Grant date | Jun 17, 1997 |
| Priority date | — |
| Expiry date | Jun 21, 2015 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T436/117497
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a pipe containing a fluid wherein particles circulate, at least one detector is attached. The detector includes a cavity in fluid communication with the pipe by a vent whose section, at least at an opening for fluid communication with a pipe is of the same dimensions as that of the circulating particles. A periodic exciter such as a source of acoustical waves or a generator of the periodic motion piston type suitable for inducing alternate pressure variations in the fluid in the cavity is coupled with the cavity. The excitation frequency can be selected in keeping with a resonance frequency of the cavity. Signals representative of the pressure variations of the excited fluid, resulting from flowing of the particles past the opening of each vent are measured. Processing of the signals allows the velocity of the particles to be determined. Other parameters of the particles can be determined by means of two distinct detectors coupled with the pipe. The detector may be used for monitoring the flow of catalytic particles in continuous reforming plants, for example.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.