FIELD: mining industry.
SUBSTANCE: device has induction sensor, output of which is connected to information input of memory block, output of which is connected to information input of indicator block and power block, output of which is connected to inputs of amplifier power, memory block and indicator block. Device is provided with delay multi-vibrator, pulse generator, integrator, discontinuous signal generator and sound emitter. Information input of delay multi-vibrator is connected to output of memory block, and output is connected to information input of integrator, output of which is connected to information input of generator of discontinuous signal, output of which is connected to sound emitter. Inputs of power of delay multi-vibrator, pulse generator and integrator and discontinuous signal generator are connected to output of power block.
EFFECT: higher efficiency.
1 dwg
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