Coder anomaly detection device and elevator device employing coder anomaly detection device

The invention provides a coder anomaly detection device which can detect noise practically and an elevator device employing the coder anomaly detection device. The coder anomaly detection device is a coder anomaly detection device detecting anomaly of a sine wave coder 4. The sine wave coder 4 outpu...

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Bibliographic Details
Main Authors AKIRA IWAMOTO, FUMIAKI MITA, NAOTO OHNUMA, KANAKO KATO, KIYOHARU HIRUTA
Format Patent
LanguageChinese
English
Published 24.12.2014
Subjects
ELEVATORS
ESCALATORS OR MOVING WALKWAYS
HAULING
HOISTING
LIFTING
PERFORMING OPERATIONS
TRANSPORTING
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Summary:The invention provides a coder anomaly detection device which can detect noise practically and an elevator device employing the coder anomaly detection device. The coder anomaly detection device is a coder anomaly detection device detecting anomaly of a sine wave coder 4. The sine wave coder 4 outputs a two-phase signal of a sine wave and a cosine wave along rotation of a rotating body. The sine wave and the cosine wave have two voltage polarities of a positive electrode and a negative electrode or with certain deviation, and the phase difference is 90 degrees. The coder anomaly detection device comprises a conversion part and a comparison part. The conversion part marks the sine wave outputted by the sine wave coder 4 as a vector on the x axis, and marks the cosine wave as a vector on the y axis. The comparison part judges tha anomaly happens when the vector deviates the threshold value in the radial direction or vector deviates the threshold value in the circumferential direction.
Bibliography:Application Number: CN20141244459