TRAIN DETECTOR FOR DUAL GAUGE

摘要

PURPOSE: A train detector for three-wire system track circuit for suppressing the rising of the receiving level is provided to suppress the influence of the mutual induction among rails by installing filter which is established that passing the competent signal and increasing the impedance in other signal. CONSTITUTION: A three-wire system track circuit comprises a common rail(3), a standard desk rail(1), and a narrow gauge rail(2). Transmitter and receiver detect 2 kinds of trains which differently forms the gauge. 2 kinds of train check signal which differently forms the frequency are used. A filter passes a band of frequency of the train check signal during driving a train on the connected rail and increases impedance during driving other train on the other rail.