System and method for detection of radiation
US8700359B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 7, 2011 |
| Grant date | Apr 15, 2014 |
| Priority date | — |
| Expiry date | Apr 29, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01T1/15
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
A system includes a count detector, a communication medium; and a processor coupled to the count detector. The processor continuously receives a plurality of pulses from the count detector. A pulse indicates a detection of a radiation unit emitted from a source material or a background. The processor determines a first period of time based on an expected range of speed of a carrier of the source material, and integrates the plurality of pulses over the first period of time, thereby yielding an integrated count associated with a time at a midpoint of the first period of time. The processor creates a continuous time series of count profiles from a plurality of integrated counts that are computed using a plurality of windows within the first period of time, and shifts each window over a second period of time. The second period of time is shorter than the first period of time. The processor estimates a background count from a history of the count profiles, computes an adaptive threshold based on the estimated background count, and detects the source material when consecutives of the integrated counts exceed the adaptive threshold.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.