Method for generating variable magnetic field based on Helmholtz coil and its simulation research

Aiming at the needs of laboratory testing of the fuze's geomagnetometer speed measurement function, this paper proposes a method of adding alternating current to the Helmholtz coil to generate a changing magnetic field. This method can accurately simulate the changing magnetic field environment when the muzzle projectile of the fuze rotates at a high speed in dynamic shooting, and can effectively control the intensity and changing frequency of the generated magnetic field by adjusting the frequency and amplitude of the coil excitation voltage. Simulation verification shows that this method can generate the external changing magnetic field environment required for the fuze meter speed measurement function test, and has high precision and accuracy.