Title:
ANOMALY DETECTING CIRCUIT FOR MAGNETIC ENCODER
Document Type and Number:
Japanese Patent JP2001201364
Kind Code:
A
Abstract:
To provide an anomaly detecting circuit for a magnetic encoder capable of detecting an anomaly in a magnetic pattern.
N poles and S poles are alternately arranged on a surface of a rotary body 1 for forming a constant magnetic pattern. One of two magnetic detection elements is arranged in a position of the N pole and an other is arranged in a position of the S pole so that each of the elements can obtain a mutually complementary signal output. An exclusive OR of the signal outputs of these two magnetic detection elements is determined at an EXOR gate 3 for outputting an anomaly signal.
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Inventors:
TAKAHASHI TORU
Application Number:
JP2000012928A
Publication Date:
July 27, 2001
Filing Date:
January 21, 2000
Export Citation:
Assignee:
NTN TOYO BEARING CO LTD
International Classes:
G01B7/30; G01B7/00; G01D5/245; H03M1/24; (IPC1-7): G01D5/245; G01B7/30; H03M1/24
Attorney, Agent or Firm:
Fukami Hisaro (3 outside)