Position detector utilizing gray code format
US4901072A · kind A · utility
17Cited by
10References
9Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 17, 1988 |
| Grant date | Feb 13, 1990 |
| Priority date | — |
| Expiry date | Feb 17, 2008 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH03M1/285
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A position detector is provided with an encoded element having indicia representative of a bit pattern of a pair of bits of a Gray code and a pair of sensors responsive to this indicia. The encoded element is capable of being mechanically coupled to a movable member and the sensors are spaced apart by a distance corresponding to a shift in the bit pattern between two bits of the Gray code such that movement of the encoded element past the sensors is used to produce two bits of the Gray code. Additional encoded elements and sensors are used to produce additional bits of the Gray code.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.