FIELD: monitoring devices for safety services with various goals.
SUBSTANCE: result is achieved by introduction of first quadrature auto-compensator for removing background voltage in receiving route of observation device and due to aforementioned increase of its amplification coefficient; by introduction of second quadrature auto-compensator - for finding small amplitude-phase fluctuations of signal in receiving route of finding device.
EFFECT: increased sensitivity of device with limited power of radiation.
2 dwg
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