Train-shunting transponder device

The invention creatively provides a train-shunting transponder device and aims to solve the problems that the conventional active transponder is high in investment and construction costs and is not conducive to popularization while a passive transponder cannot meet the places such as train shunting place for timely changing the message. The invention adopts the technical scheme as follows: power supplies of a main lamp filament and a secondary lamp filament in an annunciator are used for supplying power for a power supply unit; when the main lamp filament and the secondary lamp filament are turned on, voltage signals are generated and are processed by the power supply unit to form direct-current power for supplying power for other units; an annunciator detection unit is used for obtaining the turning on and off states of the main lamp filament and the secondary lamp filament of the annunciator and generating corresponding messages according to the turning on and off states; the messages are transmitted to a vehicle-mounted device through a communication unit. According to the train-shunting transponder device, the vehicle-mounted device does not need to be changed; the train-shunting transponder device is simple and convenient to operate and low in cost; the state of the annunciator cannot be collected; the power is supplied to the transponder; an isolation transformer is arranged in the transponder device; the interference of the annunciator on the voltage signal transponder can be avoided; the stability of equipment is improved.