TRAIN AXLE COUNTER Russian patent published in 2006 - IPC B61L1/16 

FIELD: railway transport; signaling and communication; interval traffic control.

SUBSTANCE: device contains axle transmitter with two sensor and two pulse shapers. The latter are connected with axle counting unit through pulse duration correcting unit of first and second sensors. Moreover, device is provided with unit measuring time of wheel passage between two sensors of axle transmitter and controlled clock pulse frequency divider connected with said unit. Count input of frequency divider is connected clock frequency to output of axle counting unit, and output is connected with clock inputs of pulse duration correcting units with possibility of changing value of tolerable correction of pulse duration depending on speed of train in place of axle transmitter mounting. Device features increased interference immunity as transmission of interferences to input of axle counting unit caused by movement of small diameter wheels and metal parts over axle transmitter duration of pulses from which is less than duration set by actual speed of movement of normal diameter wheels over axle transmitter is excluded.

EFFECT: improved interference immunity.

2 dwg