Screening method and apparatus
US6956369B2 · kind B2 · utility
4Cited by
1References
19Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Nov 25, 2003 |
| Grant date | Oct 18, 2005 |
| Priority date | — |
| Expiry date | Nov 25, 2023 |
Classification
- Technology area (CPC A)Human Necessities
- CPC primaryA61B5/06
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A method and apparatus to screen individuals specifically for paramagnetic or ferromagnetic objects they may be carrying or wearing, before they enter a controlled area. The device comprises a screening portal, including at least one magnetic gradiometer and its electronics. The device places all of the sensor arrays in close proximity to a subject's body, for screening purposes. The portal has at least one excitation coil oriented to cause the excitation field to have zero mutual inductance with the gradiometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.