NON-INSULATED TRACK CIRCUIT APPARATUS

PROBLEM TO BE SOLVED: To provide a non-insulated track circuit apparatus which reduces deviation of the boundary without increasing the number of facility points and enhances position resolution for train detection.SOLUTION: In a non-insulated track circuit apparatus, a receiver for one track circuit is connected to a track; transmitters are connected each to a track on the train in-coming side of the track circuit and a track on the train out-going side of the track circuit; and the individual transmitters transmit by mixing one or more signals for train detection different in frequency or being changed in time series. The area of influence of the individual signals for train detection (train detection range) is made to overlap the area of influence of signals for train detection of an adjacent transmitter. In the receiver, train detection is executed by evaluating individual reception levels of the signals for train detection, and on-rail positions are identified by a combination of signals for train detection whose reception levels are below a threshold value. 【課題】設備点数を増やすことなく、境界ずれを低減し、かつ、列車検知の位置分解能を高めることができる無絶縁軌道回路装置を提供する。【解決手段】一つの軌道回路に対して軌道に受信器を接続し、その軌道回路の列車進入側の軌道およびその軌道回路の列車進出側の軌道にそれぞれ送信器を接続し、各送信器は１つ以上の周波数の異なる列車検知用信号を混合させて、または、時系列変化させて送信するものであり、各列車検知用信号の影響範囲(列車検知範囲)は、隣接する送信器の列車検知用信号の影響範囲と重複させ、受信器では、各列車検知用信号の受信レベルをそれぞれ評価することにより列車検知を行い、受信レベルが閾値を下回った列車検知用信号の組み合わせによって在線位置を特定する。【選択図】 図１