Triaxial decoupling self-zero-setting fluxgate magnetometer zero point measurement circuit

The invention discloses a triaxial decoupling self-zero-setting fluxgate magnetometer zero point measurement circuit, and the circuit employs a bipolar intermittent pulse excitation unit composed of low-power-consumption temperature control crystal oscillator to carry out the excitation of an iron core. The circuit employs the temperature control crystal oscillator to stabilize the work frequency, enables the iron core to be demagnetized in real time in a mode of bipolar excitation, and employs an intermittent pulse voltage excitation waveform to greatly reduce the power consumption. The circuit controls a constant voltage source to carry out the excitation of the iron core through a low-resistance switch, and greatly improves the energy utilization efficiency of the excitation unit. The circuit provided by the invention employs a weak coupling mode to install a triaxial magnetic probe, reduces the triaxial coupling error through the optimization of the relative position of the triaxial magnetic probe, employs a zero point automatic measurement circuit, can carry out the programming control to achieve the online detection of a circuit zero point, and can be used in the fields of magnetic field measurement and magnetic object detection.