| 摘要 |
FIELD: measurement technology. SUBSTANCE: invention refers to field of magnetic measurements and may be used while measuring faint magnetic field of the Earth and its variations. Sensor is inserted with oscillatory circuit with ferromagnetic core, differential amplifier, integrator, bias field coils to increase sensitivity and temperature stability of conversion factor. Oscillatory circuits are tuned to frequency of generator of excitation of ferromagnetic cores placed into circuit coils. Oscillatory circuits are connected to output of generator and to inputs of differential amplifier via detector. Output of amplifier is connected to inverting input of integrator which noninverting input is connected to reference voltage source. Output of integrator is connected via resistor to base field coils connected in series opposition. EFFECT: increased sensitivity and temperature stability of conversion factor. |
