Patent · US Expired

Process and measuring system for locating a movable object by monitoring the absolute position of the object

US6124588A · kind A · utility

10Cited by

1References

26Claims

0Family size

Assignee

JOHANNES HEIDENHAIN GmbH · DE

Inventors

Rainer Hagl · Cham, DE
Steffen Bielski · Garching bei München, DE
Helmut Huber · Niederalteich, DE

Key dates

Filing date	Mar 10, 1998
Grant date	Sep 26, 2000
Priority date	—
Expiry date	Mar 10, 2018

Classification

Technology area (CPC H)Electricity
CPC primaryH03M1/308
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

A method for position determination of a rotating drive element with the aid of a measuring system is indicated, which comprises an absolute and an incremental measuring subsystem. Here, following the start of a rotary movement, absolute position measurement values are continuously determined and transmitted to a subordinated evaluation unit until a reference marking at a known absolute position has been reached. A comparison of the measurement values, known from the continuing absolute position measurement, with the known absolute position and, if required, a necessary correction, take place at the reference marking. Thereafter the reference marking is used as the reference position for the incremental measuring subsystem, the continuously absolute position is determined on the part of the measuring system and is transmitted in digital form to the evaluation unit (FIG. 1).

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.