一种用于磁场复现和屏蔽的磁干扰主动补偿技术

An Active Compensation Method of Enviromental Interference Magnetic Field for Magnetic Field Reproduction and Shielding

介绍了一种交变磁场复现系统和磁屏蔽装置中的环境磁干扰主动补偿方法,分别对主动补偿系统建模、控制参数优化、补偿参数修正、复合控制方法、电流反馈等关键问题进行了阐述,并进行了补偿试验,结果表明,该方法对典型的1Hz和50Hz环境扰动磁场具有显著的补偿效果,已在(10~100)μT/m梯度磁场标准装置、低剩磁低噪声磁屏蔽室等计量装置中得到了应用。

In this paper,an active compensation method of enviromental interference magnetic field in magnetic field reproduction system and magnetic field shielding equipment is introduced.Establishing system mathematical model,optimizing the control paramenters,Correcting compensation parameters,Compound control method,current feedback is discussed.Through experiments,the typical enviromental interference magnetic field of 1Hz and the 50 Hz can be Significantly compensated by the method.It has been applied in“10 μT/m〜100μT/m gradient magnetic field standard device”and“field calibration device of magnetic shielding coefficient”.