Method and apparatus of discriminating coal species
US5873982A · kind A · utility
5Cited by
5References
5Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Apr 24, 1997 |
| Grant date | Feb 23, 1999 |
| Priority date | — |
| Expiry date | Apr 24, 2017 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S44/904
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
In a method and apparatus for discriminating a coal species, discriminating values of coal species/properties are prepared corresponding to coal ranks, a coal to be discriminated is irradiated with near-infrared rays having different wavelengths, and light of near-infrared rays reflected from the coal is received; Aborbances of the coal are acquired, and the coal species/property discriminating value of the coal is discriminated on the basis of the absorbances and a prescribed calibration curve.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.