Radiometric cargo security device
US8507867B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2010 |
| Grant date | Aug 13, 2013 |
| Priority date | — |
| Expiry date | Aug 3, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG07C2009/0092
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Detection of a breach in security of an enclosure, such as a shipping enclosure, is indicated by detection of a change in a closed status. A detector enclosure is provided with a window opening in the detector enclosure. A reference body having an image slit is accessible from within the detector enclosure, and a radiation detector is used to alternately receive radiation through the window opening in the detector and from the reference body through the image slit. An indication of the two received radiation levels or a difference between the received radiation levels is used to provide an indication of a change in the closed status of the enclosure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.