Precise, no-contact, position sensing using imaging
US7274439B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 3, 2004 |
| Grant date | Sep 25, 2007 |
| Priority date | — |
| Expiry date | Dec 3, 2024 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T7/246
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A contact free optical motion sensor for an inertial reference system. One or more image acquisition systems are adapted to produce a series of overlapping images of a gas bearing supported spherical inertial sensor assembly. A controller coupled to receive the series of overlapping images applies a delta detection algorithm to the series of overlapping images to determine the distance, the direction of movement of the inertial sensor assembly and the resulting relative position of the gas bearing supported spherical inertial sensor assembly. The controller further calculates the rotational velocity of the inertial sensor assembly based on a time sequence between the received series of image signals and the distance moved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.