Frequency domain induction type magnetic field sensor
A magnetic field sensor, inductive technology, applied in the direction of the size/direction of the magnetic field, can solve problems that are not suitable for geophysical electromagnetic detection, and achieve the effect of stable work, high sensitivity, and small size
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[0024] The invention relates to a frequency domain inductive magnetic field sensor, comprising: a magnetic core, a coil frame, an induction coil, a sleeve-shaped electric field shielding layer, a shell, a preamplifier and a frequency compensation circuit, and an output drive circuit. in:
[0025] The coil bobbin and the induction coil are fixed on the magnetic core, the magnetic core, the coil bobbin and the induction coil are housed in the electric field shielding layer, the shell is placed outside the electric field shielding layer, the output of the induction coil is connected to the input of the preamplifier and the frequency compensation circuit, and the preamplifier The output of the frequency compensation circuit is connected with the input of the output driving circuit, and the preamplifier, the frequency compensation circuit and the output driving circuit are installed in the shell.
[0026] The pre-amplification and frequency compensation circuit is composed of a two...
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