Device and method for digital position measuring
US6577984B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2000 |
| Grant date | Jun 10, 2003 |
| Priority date | — |
| Expiry date | Jun 7, 2020 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2455
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
The invention concerns a method for indirect and sequential measuring of the absolute position of an element (1) comprising a binary coding produced by means of coding units (7) of the same surface, relatively moving with respect to an element provided with a device for reading said coding (7), said coding (7) delimiting differentiated sectors each comprising an identical separating zone, called separator, and an zone identifying a single sector, called identifier, the list of the identifier codes being contained in a memory zone accessible via a device for processing binary data transmitted sequentially bit by bit by said reading device when the elements are relatively moving. The invention is characterised in that the separator coding comprises a binary sequence which is excluded from the identifier coding, thereby immediately identifying a separator, whose knowledge of the whole code indicates the identifier following it, then the position of its corresponding sector by scanning the memory zone containing the list of identifier codes.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.