Self-contained, on-line, real-time bulk material analyzer
US4582992A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 1984 |
| Grant date | Apr 15, 1986 |
| Priority date | — |
| Expiry date | Aug 10, 2004 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01N2223/617
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A complete PGNAA bulk material analyzer is self contained in a sealed and air conditioned housing. Bulk material is channeled by an open-ended vertical chute having a one-foot-by-three-foot cross-sectional dimension through an activation region between three neutron sources and two gamma ray detectors. The sources are symmetrically disposed on one of the three-foot long sides of the chute from one end of such side to the other. The detectors are symmetrically disposed on the opposite side of the chute between positions opposing the positions of the sources on the one side of the chute. The chute is dimensioned to enable free flow of various bulk materials. It handles coal of up to a top size of four inches and with typical surface moisture contents and agglomeration characteristics. The relative disposition of the sources and detectors results in the measurements being independent of the lateral distribution of the bulk material within the chute. The signals produced by the detectors are continuously processed by signal processing equipment sealed within a separate compartment in the container to provide periodic measurements of the elemental content of the bulk material channeled …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.