| 氦光泵磁力仪信号的分析及检测 |
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| 引用本文： | 张振宇,程德福,连明昌,周志坚,王君.氦光泵磁力仪信号的分析及检测[J].仪器仪表学报,2011,32(12). |
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| 作者姓名： | 张振宇 程德福 连明昌 周志坚 王君 |
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| 作者单位： | 吉林大学地球信息探测仪器教育部重点实验室 长春130026;吉林大学仪器科学与电气工程学院 长春130026 |
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| 基金项目： | 国家"863"计划重大项目 |
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| 摘 要： | 研究了氦光泵磁力仪中共振曲线、基频调制信号和二倍频信号的特征及关系,将二倍频信号应用到光泵磁力仪检测系统中,利用其幅值在共振区外为零、在共振点处达到峰值这一特性,解决了当外磁场变化超出共振区范围时,光泵磁力仪仅利用基频调制信号难以重新快速定位共振点的问题.系统实测信号幅值变化曲线与数学模型曲线相符合,实测共振曲线线宽约200 nT,在共振点处二倍频信号经放大其峰峰值可达12.6 V,满足实用要求,为光泵磁力仪性能的提升提供了有效方法.
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| 关 键 词： | 光泵磁力仪 共振曲线 二倍频信号 幅值变化 相敏检测 |
Analysis and detection of 4He optically pumped magnetometer signal |
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| Zhang Zhenyu,Cheng Defu,Lian Mingchang,Zhou Zhijian,Wang Jun.Analysis and detection of 4He optically pumped magnetometer signal[J].Chinese Journal of Scientific Instrument,2011,32(12). |
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| Authors: | Zhang Zhenyu Cheng Defu Lian Mingchang Zhou Zhijian Wang Jun |
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| Affiliation: | Zhang Zhenyu1,2,Cheng Defu1,Lian Mingchang1,Zhou Zhijian1,Wang Jun1,2(1 Key Laboratory for Geophysical Instrumentation of Ministry of Education,Jilin University,Changchun 130026,China,2 College of Instrumentation and Electrical Engineering,China) |
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| Abstract: | The characteristics and relations of the resonance curve,fundamental and doubled frequency signals in 4He optically pumped magnetometer are studied.The OPM(optically pumped magnetometer) detection system uses the doubled frequency signal,which has the characteristic that its amplitude is zero outside the resonance region and achieves the peak at the resonance point.Therefore,we solve the problem that the resonance point of the OPM is difficult to relocate quickly when the change of magnetic field goes beyon... |
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| Keywords: | OPM resonance curve doubled frequency signal amplitude change PSD |
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