OVERHAUSER磁力仪灵敏度表征方法研究  

Study on Method of Sensitivity Characterization for OVERHAUSER Magnetometer

作　　者：王超[1] 陈曙东[1] 张爽[1] WANG Chao CHEN Shudong ZHANG Shuang(College of Electronic Science and Engineering, Jilin University, Changchun 130012, China)

机构地区：[1]吉林大学电子科学与工程学院,长春130012

出　　处：《吉林大学学报（信息科学版）》2016年第3期401-406,共6页Journal of Jilin University（Information Science Edition）

基　　金：动态激发核磁共振磁力仪技术开发基金资助项目(3R1159121411)

摘　　要：为评价OVERHAUSER磁力仪的综合性能,同时为质子磁力仪的研发提供理论指导,研究了灵敏度在时域和频域的表征方法,并在理论上证明了两种表征方法本质上的一致性;分析了采样率对灵敏度的影响;设计实验标定了JPM-2型质子磁力仪的灵敏度。实验结果表明,JPM-2型质子磁力仪灵敏度时域表征为0.18 n T,频域表征为槡0.32 n T/Hz@0.1 Hz,得到了测量数据日变分量、噪声分量的频域分布图。In order to evaluate the comprehensive performance of OVERHAUSER magnetometer, and providetheoretical guidance for the development of proton magnetometer, the methods of sensitivity characterization ofOVERHAUSER magnetometer in time domain and frequency domain are studied. Theoretical research provesthat the two methods are essentially consistent. The effect of sample rate on sensitivity is analyzed. Study showsthat the signal quality is the main impact on sensitivity. Experiments are designed to calibrate sensitivity ofJPM-2 type proton magnetometer, and experimental results indicate that the sensitivity of JPM-2 type protonmagnetometer is 0.18 nT when characterized in timefrequency domain. We obtain the frequency domaindomain, and 0.32 nT/√Hz@0.1 Hz when characterized indistribution figure of measurement data for diurnal variationcomponent and noise component.

关 键 词：质子磁力仪 灵敏度 时域 频域 噪声 

分 类 号：TN98[电子电信—信息与通信工程]