Rotating speed detecting apparatus

Details Rotating speed detecting apparatus Rotating speed detecting apparatus

Filed on

2007-05-22

Date issued

2007-05-22

Examiner

Nghiem, Michael (Department: 2863)

Patent Class

Data processing: measuring, calibrating, or testing

SubClass

Measurement system

SubSubClass

Speed

Type

Reexamination Certificate

Status

active

Patent number

11337594

Description

ABSTRACT:
A rotating speed detecting apparatus has: a bearing sensor configured to detect rotation of a motor and output detection pulses whose frequency depending on a rotating speed of the motor; and a calculating unit configured to receive the detection pulses from the bearing sensor. The detection pulses include a first pulse and a second pulse output next to the first pulse. The calculating unit calculates a revolution of the motor from a pulse interval between the first pulse and the second pulse.

REFERENCES:
patent: 4885710 (1989-12-01), Hersberger et al.
patent: 5138639 (1992-08-01), Nakamura
patent: 6219624 (2001-04-01), Russ
patent: 7058537 (2006-06-01), Sutter et al.
patent: 10227523 (2003-12-01), None
patent: 0341445 (1989-11-01), None
patent: 0401757 (1990-12-01), None
patent: 10-38906 (1998-02-01), None

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