基于遗传算法的磁自抑制加热器的设计与优化  

Optimal Design of Heater with Magnetic Field Self-suppression Based on Genetic Algorithm

作　　者：刘彦彦 祝静 谭志成 刘晓飞 王帅[5] 祝连庆[1,2,3] LIU Yanyan;ZHU Jing;TAN Zhicheng;LIU Xiaofei;WANG Shuai;ZHU Lianqing(Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing Information Science and Technology University,Beijing 100192,CHN;Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science and Technology University,Beijing 100016,CHN;Guangzhou Nansha Intelligent Photonic Sensing Research Institute,Guangzhou 511462,CHN;Beijing Aerospace Measurement and Control Technology Co.,Ltd,Beijing 100041,CHN;School of Instrument Science and Opto-electronics Engineering,Hefei University of Technology,Hefei 230009,CHN)

机构地区：[1]北京信息科技大学光电测试技术及仪器教育部重点实验室,北京100192 [2]北京信息科技大学光纤传感与系统北京实验室,北京100016 [3]广州南沙光子感知技术研究院,广州南沙511462 [4]北京航天测控技术有限公司,北京100041 [5]合肥工业大学仪器科学与光电工程学院,合肥230009

出　　处：《半导体光电》2024年第4期575-583,共9页Semiconductor Optoelectronics

摘　　要：超低磁噪声(0~10 nT)的碱金属加热技术是无自旋交换弛豫原子磁力仪实现超高灵敏度的关键,文章提出一种基于遗传算法的磁自抑制加热器多目标优化设计方法。该方法基于毕奥-萨伐尔定律推导目标函数新模型,优化的目标包括加热丝的长度、宽度、厚度和电流方向4类(18个)参数,以此获取加热器最佳磁自抑制性能。利用有限元分析方法,仿真分析了目标区域的磁场分布和温度分布,结果表明:加热器在目标区域的中心区域产生0.02 nT/mA的平均磁场和180.34℃的平均温度。实验测试结果显示:目标区域的磁通密度取值在0.13 nT/mA和0.14 nT/mA范围内,这表明加热器的磁场自抑制性能较好。该研究有助于进一步提高原子磁力仪的性能。The ultra-low magnetic noise(<10 nT)of alkali metal heating technique is critical for achieving ultra-high sensitivity in spin-exchange relaxation-free atomic magnetometers.In this study,a multi-objective optimization and design method for a magnetic-field self-suppression heater based on a genetic algorithm was proposed.A novel objective function model based on the Biot-Savart law was derived,and four types of parameters were used for the optimization objectives(a total of 18),including the length,width,thickness,and current direction of the heating wire,in order to obtain the best magnetic self-suppression performance from the heater.Using the finite element analysis method,the magnetic field distribution and temperature distribution in the target region were simulated and analyzed,and the results showed that the heater produced an average magnetic field of 0.02 nT/mA and an average temperature of 180.34℃in the center of the target region.Experimental tests confirmed that the magnetic flux density in the target region fell within the range of 0.13~0.14 nT/mA,which indicated that the heater had a better self-suppressing performance for the magnetic field.This work contributes to further enhancing the performance of atomic magnetometers.

关 键 词：无自旋交换弛豫原子磁力仪 磁自抑制 遗传算法 毕奥-萨伐尔定律 

分 类 号：TM936[电气工程—电力电子与电力传动]