FIELD: measurement technology.
SUBSTANCE: device has oscillator sending signal to induction gage sending signal to amplifier when detecting metal presence in zone under control. Executive organ is set in operation via key, two-phase detectors, amplifier filter, comparator and trigger. When operating in normal mode, temperature and other induction gage coil unbalance condition is compensated with in-phase and orthogonal components being sent to amplifier input from controlled signal unbalance multipliers via integrator. Phase rotation unit provides shit to 90° for producing orthogonal voltage. Induction gage output coils are mounted on both sides of input coil and connected to each other in series and in opposition.
EFFECT: simplified circuit.
8 cl, 9 dwg
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