Magnetic field sensing for tamper-indicating devices
US10147289B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 5, 2018 |
| Grant date | Dec 4, 2018 |
| Priority date | — |
| Expiry date | Apr 5, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/188
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
Sensing devices, systems and methods for securing articles against tampering using a unique magnetic field signature measured at two different times are provided. One or more sensing devices are secured to a ferrous surface portion of a target container. The sensing devices are secured using a plurality of magnets. The unique magnetic field signature sensed by a sensing device is produced by a combination of the plurality of magnets of the sensing device and the ferrous surface portion of the target container and earth's magnetic field. The two different times being one of a baseline measurement session and one of an observation measurement session. An observation measurement session may be triggered by a shock event or periodically.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.