RAILWAY TRAIN AXLE COUNTER Russian patent published in 1997 - IPC

FIELD: railway transport. SUBSTANCE: device has electromagnetic vibration generator, two resistors, two amplitude detectors and two counters, two transformers with three-leg magnetic cores, primary windings of transformers being connected with generator output. Device has also also OR gate, and switches. Primary windings are arranged on middle legs of cores and secondary windings, on extreme legs. Secondary windings of each transformer have equal number of turns and they are connected in opposition through resistor. Transformers are installed along different rails with shift relative to each other by not less than half the length of core so that open ends of legs are pointed towards wheels of wheelset passing along rails. EFFECT: increased reliability of axle counting.