一种高度均匀磁场梯度的产生方法  

Method for Generating Highly Uniform Magnetic Field Gradient

作　　者：刘佳琪 王国强 LIU Jiaqi;WANG Guoqiang(Institute of Space Science and Applied Technology,Harbin Institute of Technology,Shenzhen)

机构地区：[1]哈尔滨工业大学(深圳)空间科学与应用技术研究院

出　　处：《仪表技术与传感器》2024年第10期122-126,共5页Instrument Technique and Sensor

基　　金：国家自然科学基金(42241155);广东省基础与应用基础研究基金项目(2022A1515011698,2023A1515030132);深圳市科技计划项目(JCYJ20210324121412034);中央高校基本科研业务费专项资金(HIT.OCEF.2022041)。

摘　　要：梯度磁场在医学、导航和传感器技术等多个领域中具有广泛的应用,它为许多技术和应用提供了非常重要的磁场环境和测量手段。反亥姆霍兹线圈和梯度场麦克斯韦线圈都能够产生局部均匀的磁场梯度,但产生的均匀磁场梯度的范围相对较小。文中基于毕奥-萨法尔定律,通过数值仿真分析了梯度场麦克斯韦线圈磁场梯度的空间分布特征,并利用该分布特征提出了一种高度均匀磁场梯度的产生方法。数值仿真结果表明:该方法相比梯度场麦克斯韦线圈能得到均匀范围更大、均匀性更好的磁场梯度。Magnetic field gradient is widely used in many fields such as medicine,navigation and sensor technology.It provides a very important magnetic field environment and measurement means for many technologies and applications.Both anti-Helmholtz coils and gradient field Maxwell coils can produce locally uniform magnetic field gradients,but the range of the generated uniform magnetic field gradients is relatively small.Based on Biot-Safars law,this paper analyzed the spatial distribution characteristics of the magnetic field gradient of the gradient field Maxwell coil through numerical simulation,and then proposed a method for generating highly uniform magnetic field gradients based on these distribution characteristics.Numerical simulation results show that this method can obtain a magnetic field gradient with a larger uniform range and better uniformity than the gradient field Maxwell coil.

关 键 词：磁场梯度 亥姆霍兹线圈 梯度场麦克斯韦线圈 

分 类 号：TM933[电气工程—电力电子与电力传动]