FIELD: safety equipment for object protection against intrusion, particularly to guard flats, countryside houses and so on.
SUBSTANCE: unlocking device comprises locking means, key, contact, heat-radiating means, heater, photoreceiver, signal analyzer, key hole, electronic key, transmitter, basic frequency generator, modulation code generator, phase manipulator, power amplifier, transmitting antenna, receiving antenna, high frequency amplifier, reference voltage generation means, phase doubler, narrow-band filter, phase halver, phase detector and recording unit.
EFFECT: increased lock reliability due to possibility to transfer alarm signal over radio channel to owner or to a private security agency in the case of lock opening by wrong key.
3 cl, 4 dwg
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