Orthogonal fundamental mode fluxgate sensor
A fluxgate sensor, orthogonal basis technology, applied in the magnetic field measurement, the size/direction of the magnetic field, etc. using the principle of magnetic flux control, to achieve the effect of expanding the effective observation range, improving the dynamic range, and reducing noise
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[0045] See attached figure 1 , a quadrature fundamental-mode fluxgate sensor, including a cobalt-based amorphous wire, an excitation current source, an induction coil, a clock source, a preamplifier, a bandpass filter, a phase-sensitive detector, a low-pass filter, and a feedback channel . Among them, cobalt-based amorphous wire, excitation current source and clock source constitute the excitation circuit of the sensor; induction coils, preamplifiers, band-pass filters, phase-sensitive detectors, low-pass filters, feedback channels and clock sources constitute the sensor’s measuring circuit. One end of the cobalt-based amorphous wire is grounded, and the other end is connected to the excitation current source; one end of the excitation current source is connected to the cobalt-based amorphous wire, and the other end is connected to the clock source; the induction coil is wound around the cobalt-based amorphous wire. The outer tube wall is connected with the preamplifier at t...
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