摘要
提出一种在单片机的控制下用逐次渐近反馈比较式的背景磁场自动补偿方法,设计了实现高精度自动补偿的硬件电路和程序实现。仪器经自动补偿后,在大约60000nT的背景地磁场中,能使磁力计探头工作在几个nT左右的真正"零背景场"下。适于井下磁力计或其他不能进行实地操作的磁力计的背景场补偿,并有利于磁力计分辨力的提高。同时也实现了仪器观测的自动化、智能化和远程监控。
A novel method of background geomagnetic field auto compensation is presented in this paper, which is based on successive approximation through the way of comparison and feedback. This paper also introduces the design of the high accuracy auto compensation hardware and software algorithm. Result shows that the proposed method can ensure the senor work at ＇ zero background magnetic field＇ of few nTs under about 60 000 nTs real geomagnetic background. Furthermore, the method presented in this paper can also realize automatic and intelligent observation and remote control of the instrument.
出处
《仪器仪表学报》
EI
CAS
CSCD
北大核心
2010年第4期956-960,共5页
Chinese Journal of Scientific Instrument
基金
"十一五"国家科技支撑项目(2006BAC01B01-02-05)
公益性行业(地震)科研专项(20070817)资助项目
关键词
磁通门磁力仪
自动补偿
相对观测
背景磁场
flux-gate megnetometer
auto-compensation
relative recording
background magnetic field
