Electro-optical method and system for in situ measurements of particle size and distribution
US4140395A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 7, 1976 |
| Grant date | Feb 20, 1979 |
| Priority date | — |
| Expiry date | Dec 7, 1996 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N15/0205
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method provides in situ measurements of the size of particulate matters suspended in fluid medium. A beam of intermittently interrupted electromagnetic radiation is directed through a portion of the fluid medium and radiation backscattered from a first optically defined region disposed within the fluid medium at a location having substantially uniform incident illumination is detected and utilized to provide an indication of the size and distribution of the suspended particles. To assist in assuring particles under surveillance are within the first region at the time the measurements are made, light backscattered from a further region disposed in the fluid medium and containing the first region is collected and compared with the intensity of the radiation backscattered from the first region prior to making the measurements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.