FIELD: railway automatic- and remote-control equipment. SUBSTANCE: sensor designed to detect vehicle within definite length of track such as classification track of hump has inductive stub placed inside rail track in certain length of track. Stub is inserted in oscillatory circuit of ac signal generator. Adjusting circuit set up of digital-to-analog converter, reversing counter, pulse generator, respective comparator, and AND gate is inserted in negative feedback circuit of the latter. EFFECT: improved immunity of sensor to various destabilizing factors. 1 dwg
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