Method of maintaining tilt angle, method of controlling tilting, and surveillance camera
US10567653B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 22, 2018 |
| Grant date | Feb 18, 2020 |
| Priority date | — |
| Expiry date | Mar 22, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/687
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of rotating a surveillance camera having an acceleration sensor and being controllable by a processor to maintain a tilt-angle to conform to a command tilt-angle, includes the steps of moving the surveillance camera tilt to a predetermined command tilt-angle in response to a signal from the processor; periodically calculating estimated tilt-angles by using acceleration values in at least one axis of an acceleration sensor; calculating a difference value between an estimated tilt-angle of a current period and an estimated tilt-angle of a previous period; and when the difference value between the estimated tilt-angles exceeds a set limit, moving the camera to another position to correct the tilt angle according to the difference calculate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.