Method and device for detecting a rotational speed...

Details Method and device for detecting a rotational speed... Method and device for detecting a rotational speed...

2006-06-06

2006-06-06

Bui, Bryan (Department: 2863)

Data processing: measuring, calibrating, or testing

Measurement system

Orientation or position

C702S145000, C702S148000, C702S151000

Reexamination Certificate

active

07058537

ABSTRACT:
An apparatus and a method with which a more-precise indication of an rpm is possible even if a position signal continues to be absent. To that end, a counter state of a counter is evaluated and is set to zero at each position signal. If the expected position signal remains absent for an overly long time, an rpm is estimated on the basis of the counter state of the counter. In this way, an rpm change can rapidly be detected and compensated for.

REFERENCES:
patent: 4305370 (1981-12-01), Hohne
patent: 4885710 (1989-12-01), Hersberger et al.
patent: 0341445 (1989-11-01), None
patent: 0401757 (1990-12-01), None

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