Method and system for diagnosing abnormality of hydraulic device

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United States of America Patent

PATENT NO 11181130
APP PUB NO 20190338792A1
SERIAL NO

16392927

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Abstract

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An abnormality diagnosis method is targeted at a hydraulic device which includes a hydraulic pump and a driven device driven by the hydraulic pump. The method includes calculating a frequency distribution with regard to a deviation between a normal value of an output parameter corresponding to an operation condition and an actual measurement value of the output parameter using a prediction model, and determining the presence of an abnormality if an average of the deviation exceeds a threshold. If the presence of the abnormality is determined, a factor of the abnormality is estimated based on the range of the deviation where a waveform peak of the frequency distribution exists.

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Patent Owner(s)

  • MITSUBISHI HEAVY INDUSTRIES, LTD.

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Hayashi, Kentaro Tokyo, JP 108 448
Hayashi, Toshikazu Tokyo, JP 28 133
Kubo, Hiroyoshi Tokyo, JP 37 285
Yuge, Atsushi Tokyo, JP 25 76

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