MONITOR

PROBLEM TO BE SOLVED: To be capable of coping to prevent an occurrence of a failure before the failure occurs to a device.SOLUTION: A determination unit 11 repeatedly determines whether train control information supplied from an on-board device 5 which is monitoring subject is normal or abnormal. A travel control unit 13 determines that an inconvenience has occurred when frequency of an abnormal determination in a prescribed period fulfills a prescribed condition and carries out a predetermined process in failure. For example, when the abnormal determination continues through the failure determination period, determines that the failure determination condition is fulfilled and the process in failure is carried out. A prediction unit 16 predicts an occurrence of a failure when the frequency of the abnormal determination is fulfilled during a prescribed period which is longer than the failure determination period.SELECTED DRAWING: Figure 3 【課題】装置に不具合が発生する前にその不具合の発生を未然に防ぐための対応を可能とすること。【解決手段】判定部１１は、監視対象である車上子５から供給されてくる列車制御情報が正常か異常かを繰り返し判定する。走行制御部１３は、所定の期間における異常判定の頻度が所定の条件を満たす場合に、不具合が発生したと判定し、予め定められた不具合時処理を行う。例えば、不具合判定期間を通して異常判定が連続する場合に、不具合判定条件が満たされたと判断し、不具合発生時処理を行う。予報部１６は、不具合判定期間よりも長い所定の期間における異常判定の頻度が所定の条件を満たすと不具合の発生を予報する。【選択図】図３