To accurately detect abnormality of a monitoring object.SOLUTION: A signal acquisition unit of a monitor system acquires output from an exhaust valve position sensor as a measurement signal. A signal processing unit performs processing by an auto encoder to the measurement signal for outputting a processing signal. A detection unit compares the measurement signal with the processing signal for detecting abnormality on an exhaust system. A first determination unit of the detection unit determines that abnormality occurs on the exhaust system, when a cumulative error for one cycle between the measurement signal and the processing signal is equal to or greater than a first error threshold (steps S131-S132). A second determination unit determines that abnormality occurs on the exhaust system when an error between the measurement signal and the processing signal on a prescribed notable sampling point is equal to or greater than a second error threshold, in a specific region being parts of the measurement signal and the processing signal for one cycle (steps S133-S136). Therefore abnormality on the exhaust system can be detected accurately.SELECTED DRAWING: Figure 5B

    【課題】監視対象の異常を精度良く検出する。【解決手段】監視システムの信号取得部は、排気弁位置センサからの出力を測定信号として取得する。信号処理部は、測定信号に対するオートエンコーダによる処理を行って、処理信号を出力する。検出部は、測定信号と処理信号とを比較して排気システムの異常を検出する。検出部の第1判定部は、測定信号と処理信号との1周期分の累積誤差が第1誤差閾値以上である場合に排気システムを異常と判定する(ステップS131〜S132)。第2判定部は、1周期分の測定信号および処理信号の一部である特定領域において、所定の注目サンプリングポイントにおける測定信号と処理信号との誤差が、第2誤差閾値以上である場合に排気システムを異常と判定する(ステップS133〜S136)。これにより、排気システムの異常を精度良く検出することができる。【選択図】図5B


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    Title :

    MONITOR SYSTEM AND MONITOR METHOD


    Additional title:

    監視システムおよび監視方法


    Contributors:
    KUNIOKA JUN (author) / WATANABE AKIRA (author) / HATTA TAKASHI (author) / MINE TAKAAKI (author)

    Publication date :

    2021-03-01


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    G01M TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES , Prüfen der statischen oder dynamischen Massenverteilung rotierender Teile von Maschinen oder Konstruktionen / B63H Schiffsantrieb oder Steuerung der Schiffe , MARINE PROPULSION OR STEERING / G05B Steuer- oder Regelsysteme allgemein , CONTROL OR REGULATING SYSTEMS IN GENERAL



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