Magnetic absolute encoder

Details Magnetic absolute encoder Magnetic absolute encoder

2007-12-07

2008-12-30

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Displacement

C324S174000

Reexamination Certificate

active

07471080

ABSTRACT:
In the magnetic absolute encoder, an ordinary operating circuit and an ordinary/backup operating circuit are actuated during ordinary operation in which power is supplied from the ordinary operating power supply; the single-rotation absolute value (1) and single-rotation absolute value (2) detected by these circuits are compared by the abnormality diagnosis circuit, and the presence or absence of an abnormality is automatically judged During backup in which the ordinary operating power supply is interrupted, only the low-power-consumption ordinary/backup operating circuit is actuated, and the multiple-rotation value (2) is detected At the point in time at which the system is returned to ordinary operation, the multiple-rotation value setting circuit sets the multiple-rotation value (2) as the multiple-rotation value (1) of the ordinary operating circuit. As a result, the calculation operation of the multiple-rotation value (1) can be restarted.

REFERENCES:
patent: 2002/0124663 (2002-09-01), Tokumoto et al.
patent: 2007/0093359 (2007-04-01), Kobayashi et al.
patent: 5-233064 (1993-09-01), None

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