Lock device having position sensor
US9790736B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 13, 2015 |
| Grant date | Oct 17, 2017 |
| Priority date | — |
| Expiry date | Jul 24, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG08B29/181
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
A position sensing system and method for detecting the displacement of a door from a reference position, such as, for example, from a closed position. The system includes a magnetometer that may be operably connected to the door, and which measures positional location relative to a reference magnetic field, such as, for example, a magnetic field provided by a magnet of a lock device. The system may also include an accelerometer that detects acceleration of the door, and thereby provides an indication of when location is to be measured by the magnetometer. Measurement information from the magnetometer is used to derive a position indicator that is compared to a reference indicator, the reference indicator being associated with the reference position. Differences between the position and reference indicators may provide an indication that the door has been moved from the reference position.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.