To provide an alarm system performing two-stage wireless communication that can quickly determine communication delay.SOLUTION: In an alarm system 1, a crossing control machine 30 transmits detection information about trouble relating to a crossing CR to a central device 10 and the central device 10 transmits alarm information based on the detection information to an on-vehicle device 42. The central device 10 has a first counter counting the number of continuous times at which response information with respect to first request information, which should be repeatedly transmitted, has not been received from the crossing control machine 30, and repeatedly transmits second request information including the alarm information and a count value to the on-vehicle device 42. The on-vehicle device 42 has a second counter counting the number of continuous times at which second request information has not been received, and resets the second counter at a count value included in the second request information to execute fail-safe processing when the count value of the second counter satisfies a number condition.SELECTED DRAWING: Figure 1

    【課題】2段階の無線通信を行う発報システムにおいて、通信遅延を速やかに判定できるようにすることである。【解決手段】発報システム1は、踏切制御機30が踏切CRに関する支障の検出情報を中央装置10へ送信し、当該検出情報に基づく警報情報を中央装置10が車上装置42に送信する。中央装置10は、繰り返し送信する第1要求情報に対する応答情報を踏切制御機30から受信できない連続回数をカウントする第1カウンタを有し、車上装置42に対して、警報情報とカウント値とを含む第2要求情報を繰り返し送信する。車上装置42は、第2要求情報を受信できない連続回数をカウントする第2カウンタを有し、第2要求情報に含まれるカウント値で第2カウンタをリセットし、第2カウンタのカウント値が回数条件を満たした場合にフェールセーフ処理を実行する。【選択図】図1


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    Title :

    ALARM SYSTEM AND ALARM METHOD


    Additional title:

    発報システムおよび発報方法


    Contributors:

    Publication date :

    2021-09-02


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen



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