Abnormality detection apparatus for rotary type absolute...

Details Abnormality detection apparatus for rotary type absolute... Abnormality detection apparatus for rotary type absolute...

2008-03-13

2010-02-09

Aurora, Reena (Department: 2858)

Electricity: measuring and testing

Magnetic

Displacement

Reexamination Certificate

active

07659714

ABSTRACT:
In order to cope with many rotor diameters using a single type of stator portion, two stator portions, each having a built-in signal processing circuit for detecting absolute positions independently, are disposed in opposition at positions which differ from each other with respect to a rotational center of a rotor portion. When one of the stator portions receives a request command RX from an external device, it transmits a detected serial communication signal. The other stator portion receives the transmitted serial communication signal, determines a position detection abnormality, and notifies the abnormality to the external device when a difference between the received absolute position and the absolute position detected by the other stator portion exceeds a deviation previously set for 180 degrees.

REFERENCES:
patent: 6906491 (2005-06-01), Matsuo et al.
patent: 2005-61907 (2005-03-01), None
esp@cenet patent abstract for Japanese Publication No. 2005061907, Publication date Mar. 10, 2005 (1 page).

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