Simulation of Large-scale Magnetic Shielding Room for High-precision Vector Magnetometer Ground Test and Calibration System

In this paper, the simulation analysis of a large-scale magnetic shielding room is carried out by using the finite element analysis method, and the modeling and performance simulation calculation of a large-scale magnetic shielding room for ground calibration of a high-precision vector magnetometer are completed, and the simulation calculation and measured results of the magnetic shielding room are compared and analyzed from the aspects of shielding effectiveness, opening influence, internal magnetic field uniformity and other aspects. The results show that the measured value of the remnant magnetism in the central area of the magnetic shielding space is in good agreement with the simulated results, and the remnant magnetism distribution trend is basically the same, which proves the feasibility of the finite element analysis method in the quantitative analysis of the shielding performance of the magnetic shielding room. The finite element analysis method can realize the quantitative calculation of the remnant magnetic influence of the shielding room opening, which provides a basis for the design of shielding room doors and ventilation holes, At the same time, the size of the uniform area of the internal magnetic field and the residual gradient can be verified, which effectively avoids the risk of finding the performance does not meet the requirements after the implementation of the project. Aiming at the design and research of large-space magnetic shielding room, the method based on finite element and ANSYS Maxwell software simulation adopted in this paper is conducive to guarantee the performance and construction efficiency of the large-space magnetic shielding room.