TRAIN DETECTION DEVICE WITH FAILURE DIAGNOSING FUNCTION AND FAILURE PORTION DETERMINATION METHOD

To improve a train detection device with a failure diagnosing function for diagnosing the quality of energization relating to a track circuit such that the track circuit can be easily recovered from the failure.SOLUTION: New failure diagnosis parts 50 to 70 are added to train detection devices 20 to 40 with a basic configuration. The failure diagnosis parts 50 to 70 include a time domain reflectance measuring part 52 sending a pulse signal B to a train detection signal transmitting cable 32 to measure a reflection signal BR, a transmission side diagnosis part 53 measuring the presence/absence and a portion of failure based on the measurement result, a time domain reflectance measuring part 62 sending a pulse signal C to a train detection signal receiving cable 42 to measure a reflection signal CR, and diagnosis parts 53, 63, 70 measuring the presence/absence and a portion of failure relating to the cables 32, 42 based on the measurement results. The investigation of a rail part 20 is performed after it is diagnosed that there is no failure in both of the cables 32, 42.SELECTED DRAWING: Figure 1 【課題】軌道回路に係る通電の良否を診断する故障診断機能付き列車検知装置について軌道回路を障害から容易に復旧させられるように改良する。【解決手段】基本構成の列車検知装置２０～４０に新規な故障診断部５０～７０を付加する。後者５０～７０に、列車検知信号送信ケーブル３２にパルス信号Ｂを送出して反射信号ＢＲを測定する時間領域反射率測定部５２とそれに基づいて不具合の有無と部位とを調べる送信側診断部５３と、列車検知信号受信ケーブル４２にパルス信号Ｃを送出して反射信号ＣＲを測定する時間領域反射率測定部６２と、それらの測定結果に基づいてケーブル３２，４２に係る不具合の有無と部位とを調べる診断部５３，６３，７０とを備える。レール部２０の調査は、両ケーブル３２，４２に不具合が無いと診断されてから行う。【選択図】 図１