TRACK CIRCUIT Russian patent published in 2004 - IPC

FIELD: railway transport; railway signaling and communication.

SUBSTANCE: proposed track circuit contains track generator, rail line, matching transformer, rectifier, resistor, logic AND and OR gates, analog-to-digital converter, register, generator and subtracter. Track circuit is furnished with track receiver, other matching transformer, filter, capacitor, multiplexer and two triggers. Output of track generator is connected through matching transformer to one end of rail line and filter input is connected to other end of line through other matching transformer. Output of filter is connected with analog inputs of track receiver. Analog inputs of track receiver are inputs of rectifier whose outputs are connected through resistor to analog inputs of analog-to-digital converter to which capacitor is connected. Outputs of analog-to-digital converter are connected with first inputs of subtracter whose first inputs are connected with outputs of register, and outputs are connected with inputs of multiplexer, one of outputs of the latter being connected with reset inputs of first and second triggers. Other output of multiplexer is connected with setting input of second trigger, and third output of said multiplexer is connected with setting input of first trigger whose output is connected with one of inputs of OR gate whose other input is connected with second input of track receiver. Output of OR gate is connected with second input of AND gate, third and second inputs of AND gate are connected, respectively, with first input of track receiver and output of generator, and first input of logic AND gate is connected with output of second trigger and with output of track receiver. Output of track receiver is connected with first input of following track receiver and second input of preceding track receiver.

EFFECT: provision of reliable control over track section.

2 dwg