Proximity alarm device, proximity alarm system, mobile device, and method for diagnosing failure of proximity alarm system
US9779625B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 3, 2013 |
| Grant date | Oct 3, 2017 |
| Priority date | — |
| Expiry date | Aug 25, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG10K9/18
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A proximity alarm device includes a control unit, an amplifying unit, an output terminal, a ground terminal, a detection unit, and a determining apparatus. The control unit receives an input of a referencing signal. An output of the control unit is electrically connected to the amplifying unit. An output of the amplifying unit is electrically connected to an output terminal. The ground terminal is electrically connected to a ground. The output of the amplifying unit is electrically connected to the detection unit. An output of the detection unit is electrically connected to the determining apparatus. Then, the determining apparatus compares a detection signal detected by the detection unit and a determination reference signal with each other.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.