Electrically controlled camera positioning system
US5633681A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 6, 1995 |
| Grant date | May 27, 1997 |
| Priority date | — |
| Expiry date | Mar 6, 2015 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/695
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A camera positioning system for rotating a video camera about a rotation axis. The system includes a camera platform to which the camera is rotatably attached; a motor mounted to a base for driving the camera platform to effect rotation of the platform about the axis and relative to the base; a drive for coupling the motor to the camera platform; an electrically driven capacitive sensor assembly for generating electrical position signals for determining a rotational position of the camera platform relative to the base; and a feedback control circuit for using the position signals from the capacitive sensor assembly to control rotational positioning of the motor, resulting in rotating the camera to a desired camera position. The capacitive sensor has a conductive guard plate which helps immunize the capacitive sensor assembly from noise and from ground potentials. The rotation axis can be horizontal or vertical with the camera rotated to effect pan or tilt respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.