Research on Fusion Algorithm Based on Butterworth Filter and Kalmar Filter

When the geomagnetic field strength is measured by the geomagnetic measurement unit, the measurement signal is distorted due to a variety of noise disturbances. In this paper, a geomagnetic measurement method based on Kalmar filter fusion is proposed, and the simulation model is built. The simulation results show that this filtering scheme can effectively filter high frequency noise and random noise, and realize the real signal reduction.