Incremental position measuring system

Details Incremental position measuring system Incremental position measuring system

1991-04-08

1992-07-14

Miller, Stanley D.

Electrical pulse counters, pulse dividers, or shift registers: c

Applications

Measuring or testing

377 3, 377 32, G06M 306

Patent

active

051310171

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.

REFERENCES:
patent: 4064501 (1977-12-01), Yost et al.
patent: 4085311 (1978-04-01), Ohsako et al.
patent: 4229647 (1980-10-01), Burkhardt
patent: 4897647 (1990-01-01), Sakamoto et al.

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