Indoor adjustable phase-sensitive track circuit

The invention provides an indoor adjustable phase-sensitive track circuit.The circuit comprises a sending end circuit and a receiving end circuit.The sending end circuit comprises an indoor sending unit, the indoor sending unit transmits a signal to a steel track through a first anti-thunder unit and a first choke transformer arranged outdoors, the steel track serves as a carrier, and the signal in transmitted to the receiving end circuit.The receiving end circuit comprises a second choke transformer arranged outdoors, the signal is subjected to voltage transformation processing of the second chock transformer and then transmitted to an in indoor receiving unit through a second anti-thunder unit, the indoor receiving unit processes the signal and then outputs the signal to drive a relay to work, and when the relay is attracted upwards, a track section is idle; when the relay falls down, the track section is occupied.Traction voltage and phase adjusting is conducted indoors, the transformation ratio of the cho