Aiming at the problem of magnetic field interference in the tunneling magnetic effect gravity sensor

a magnetic interference suppression method in which a high-frequency pulse magnetic field is used instead of a constant magnetic field is proposed.Firstly

the working principle of the tunneling magnetic effect gravity sensor is analyzed

and the magnetic field distribution model of the energized coil is established.Then

a high-frequency pulse current is introduced to generate a high-frequency pulse magnetic field instead of a constant magnetic field.A mathematical model between the magnetic field intensity and the input acceleration is established.A detection circuit for the tunneling magnetic effect gravity sensor is designed

and the mathematical relationship between output voltage and input acceleration of the circuit is demonstrated.Finally

the modal and electromagnetic anti-interference performance of the tunneling magnetic effect gravity sensor are simulated by ANSYS and Maxwell.The simulation results show that when an ambient geomagnetic field is present and acceleration is input along the sensitive axis

the detection error of the magnetic field under high-frequency pulse current excitation is 0.791 9 %

which is 4.167 2 % lower than that under direct current（DC）excitation.