Motion sensor assembly for determining the angular velocity of a moving contrast in its field of view with a high accuracy
US9797919B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 17, 2013 |
| Grant date | Oct 24, 2017 |
| Priority date | — |
| Expiry date | Dec 24, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S11/12
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A motion sensor assembly is adapted to determine an angular velocity of a moving contrast in its field of view. The motion sensor assembly includes: a motion sensor with a first and a second analog photoreceptor each adapted for observing the moving contrast, the first and the second photoreceptors being separated by a predetermined interreceptor angle; and an angular velocity calculating unit connected to the first and second photoreceptors for calculating the angular velocity of the moving contrast based on a first and a second analog signal delivered by the first and the second photoreceptors, respectively. The first and the second analog signals delivered by the first and the second photoreceptors at are sampled a given sampling frequency to obtain a first and a second digital signal, respectively. An interpolator is configured to interpolate the first and the second digital signals upon their crossing a predetermined threshold between successive samples.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.