Incremental position measuring system
US5131017A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 8, 1991 |
| Grant date | Jul 14, 1992 |
| Priority date | — |
| Expiry date | Apr 8, 2011 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/2451
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An evaluation device with an absolute value counter is provided in an incremental position measuring system, which determines the absolute position even in case of loss of the main power supply. The evaluation device is operated by means of an emergency power supply while the main power supply is out. Following the restoration of the main power supply, counting pulses are supplied to a follow-up counter (11) by a pulse emitter, until the follow-up counter has reached the counter reading of the absolute value counter. Two rectangular signals, which are phase-shifted by 90.degree. in relation to each other, are formed as a function of the counting signals, which are present at the evaluation device in the form of output signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.