摘要
针对弱磁检测在国内精度不高,国外又限制出口的问题,设计了一款基于拉莫尔频率测量的弱磁检测电路。分析了光泵磁力仪的物理原理,由此得出拉莫尔频率与地磁场强度的关系,以此关系为核心,寻求高精度的拉莫尔频率测量的方法与原理,并基于此方法与原理设计并实现了相关的弱磁检测电路。进行实地系统测试和结果分析,通过一组测量数据表明该频率计的稳定度和精度基本满足设计指标。
Aiming at the problem that weak magnetic detection in the domestic is not precise enough and the foreign restrict exports of it,a weak magnetic detection circuit section based on the Larmor frequency measurements was designed. The relationship between the Larmor frequency and intensity of the geomagnetic field was derived by analyzing the physical principle of the optical pumping magnetometer. And take this relationship as the core and seek the high-precision methods and principles of Larmor frequency measurements,on the basis of which the related weak magnetic detection circuit section was designed and implemented. Through the field system testing and results analysis,a set of measurement data shows that the stability and accuracy of the frequency meter basically meet the design targets.
出处
《仪表技术与传感器》
CSCD
北大核心
2017年第10期67-69,共3页
Instrument Technique and Sensor
基金
国家自然科学基金项目(41274188)
关键词
弱磁检测
拉莫尔频率
光泵磁力仪
地磁场
高精度
稳定度
weak magnetic detection
Larmor frequency
optical pumping magnetometer
geomagnetic field
high precision
stability
