Method and apparatus for determining a position of a movable barrier
US6495821B1 · kind B1 · utility
4Cited by
11References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Feb 16, 2000 |
| Grant date | Dec 17, 2002 |
| Priority date | — |
| Expiry date | Feb 16, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/34792
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A movable barrier operator includes an absolute position detector which provides a unique value for each position of the barrier along its path of travel. The absolute position detector employs multiple binary serial streams and one multiple clock stream. After the first five cycles of the clock stream, the binary streams can be decoded by a processor to produce an absolute position. Every clock edge produces a new absolute position along the path of travel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.