Position encoder

Details Position encoder Position encoder

1995-06-07

1997-07-22

Gaffin, Jeffrey A.

Coded data generation or conversion

Digital pattern reading type converter

Having combined coding pattern

341 1, 341 2, 341 3, 341 11, 318701, H03M 122

Patent

active

056507798

ABSTRACT:
A sensor failure detection circuit for a position encoder, the sensor failure detection circuit receiving from a first set of at least one position sensor position signals which change state at a high resolution and from a second set of at least one position sensor position signals which change state at a lower resolution, the detection circuit monitoring a count for the position signals at the high resolution between states of the position signals at the lower resolution and comparing the count with a predetermined range which represents an expected count for the position signals at the high resolution between the states of the position signals at the lower resolution.

REFERENCES:
patent: 4494509 (1985-01-01), Long
patent: 4494518 (1985-01-01), Katayama et al.
patent: 4507590 (1985-03-01), Miyazakil
patent: 4532461 (1985-07-01), Crook
patent: 4855734 (1989-08-01), Elsdoerfer
patent: 4896088 (1990-01-01), Jahns
patent: 4896089 (1990-01-01), Kliman et al.
patent: 4914437 (1990-04-01), Kibrick et al.
patent: 5198738 (1993-03-01), Blaser et al.
patent: 5283740 (1994-02-01), Sato et al.
Stephenson and Blake, The Characteristics, Design and Applications of Switched Reluctance Motors and Drives, (Jun. 1993, Nuremberg, Germany).

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