Object detection method and apparatus
US7167123B2 · kind B2 · utility
28Cited by
57References
21Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 24, 2004 |
| Grant date | Jan 23, 2007 |
| Priority date | — |
| Expiry date | Mar 13, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S7/2883
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Method and apparatus for detecting objects. In one embodiment, a person entering a secured zone is illuminated with low-power polarized radio waves. Differently polarized waves which are reflected back from the person are collected. Concealed weapons are detected by measuring various parameters of the reflected signals and then calculating various selected differences between them. These differences create patterns when plotted as a function of time. Preferably a trained neural network pattern recognition program is then used to evaluate these patterns and autonomously render a decision on the presence of a weapon.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.