Development of high-performance active magnetic shield for bio-magnetic applications

我们利用非晶带和FRP复合材料制成的一对半圆柱形结构的磁壳，开发了一种有源磁屏蔽。主动补偿技术是一种排除外界磁噪声的技术。我们还开发了用于补偿系统的宽带，高分辨率磁传感器和低噪声功率放大器。我们将所述屏蔽应用于SQUID系统的MCG测量，并首次应用于6通道磁通门传感器阵列。本文提出了一种通过在所开发的磁屏蔽体中绘制磁场来识别磁标记物的累积位置的方法。

We have developed an active magnetic shield using a pair of magnetic shells of half cylindrical structure made of amorphous tapes and FRP composite. Active compensation technique to expel magnetic noises coming from outside has beendeveloped. We have also developed a wide-band, high resolution magnetic sensor andlow-noise power amplifiers for the compensation system. We applied the said shield for the MCG measurement by a SQUID system and, for the first time, by a fluxgate sensor array of 6 channels. A method has been developed by which accumulated location of magnetic markers in a phantom can be identified by mapping magnetic fields in the developed magnetic shield.