FIELD: electricity.
SUBSTANCE: device includes in-series connected signal shaping assembly, detector, amplifier, threshold device and actuating mechanism. Actuating signal shaping assembly consists of input LC-loop parallel connected to antenna - transmitter and through resistance element to output of high-frequency (HF) generator; at that, resistance element and LC-loop form divider of high-frequency voltage between output of HF-generator and common wire, and LC-loop is pre-tuned to level of high-frequency voltage, which is 0.4 - 0.9 of maximum level of voltage of HF-generator.
EFFECT: simplifying the design, and improving sensitivity and interference immunity.
1 dwg
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