To provide an approach detection device which detects an approach of a movable body that is not permitted to enter an approach inhibited area.SOLUTION: An approach detection device 30 comprises extracting means 60, grouping means 70 and determining means 80. The extracting means extracts second reflecting points R2 which are monitored objects, from first reflecting points R1 of an electromagnetic wave emitted to a monitored region MA containing a line closing unstarted section that is an example of an approach inhibited area, using at least a first threshold value about a travel speed and a second threshold value about a reflecting intensity. The grouping means divides the second reflecting points R2 extracted by the extracting means 60 into one or more groups. The determining means determines whether or not a working vehicle V that is an example of not permitted movable bodies, enters the line closing unstarted section, based on a distribution state of the second reflecting points R2 belonging to the same group in the second reflecting points R2, in the monitored region MA.SELECTED DRAWING: Figure 10A

    【課題】進入禁止エリアへの許可されていない移動体の進入を検知する。【解決手段】進入検知装置30は、進入禁止エリアの一例である線閉未着手区間を含む監視領域MAに向けて発せられた電波の第1の反射点R1から、少なくとも移動速度に関する第1の閾値と反射強度に関する第2の閾値とを用いて、監視対象の第2の反射点R2を抽出する抽出手段60と、抽出手段60で抽出された第2の反射点R2を、1つ以上のグループにグループ分けするグループ化手段70と、第2の反射点R2のうちの同一グループに属する第2の反射点R2の監視領域MA内における分布状態に基づいて、許可されていない移動体の一例である作業用車両Vが線閉未着手区間に進入したか否かを判定する判定手段80と、を備える。【選択図】図10A


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    Title :

    APPROACH DETECTION DEVICE, APPROACH DETECTION SYSTEM, AND APPROACH DETECTION METHOD


    Additional title:

    進入検知装置、進入検知システム、及び、進入検知方法


    Contributors:

    Publication date :

    2021-04-15


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B61L Leiten des Eisenbahnverkehrs , GUIDING RAILWAY TRAFFIC / G01S RADIO DIRECTION-FINDING , Funkpeilung



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