Measurement of sizes of falling particles
US4843894A · kind A · utility
3Cited by
14References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1987 |
| Grant date | Jul 4, 1989 |
| Priority date | — |
| Expiry date | Sep 14, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/02
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
For measuring the sizes of particles in the falling state, electromagnetic waves having different frequencies are transmitted from a transmitter/receiver onto the particles in the falling state and reflected electromagnetic waves having different frequencies reflected from the particles in the falling state and received by the transmitter/receiver. Data of the distribution of sizes of the particles and the average size of the particles are derived from the detected intensities of the received reflected electromagnetic waves.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.