Detection of explosives by nuclear quadrupole resonance
US5206592A · kind A · utility
Inventors
Key dates
| Filing date | May 23, 1991 |
| Grant date | Apr 27, 1993 |
| Priority date | — |
| Expiry date | May 23, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/441
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A system and method for detecting a class of explosives and narcotics containing nitrogen in a specimen by nuclear quadrupole resonance which improves the selectivity, sensitivity and spatial localization over conventional detection systems. As a result, sub-kilogram quantities of explosives and narcotics against a background of more benign materials may be detected by the nuclear quadrupole resonance system and method. Also, by the use of a meanderline surface coil, the electrical and magnetic fields will fall off rapidly over a short distance so that a localized region may be scanned and people may be scanned without depositing substantial RF power into the body. Furthermore, by using a strong off-resonance comb (SORC) irradiation sequence, the signal-to-noise ratio of the detected signal is improved for obtaining a more accurate detection signal from the specimen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.