基于“磁滞复用”的超宽频（DC-10kHz）弱磁传感器技术研究

项目名称： 基于“磁滞复用”的超宽频（DC-10kHz）弱磁传感器技术研究

项目编号： No.41274183

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 王言章

作者单位： 吉林大学

项目金额： 100万元

中文摘要： 深部矿产资源、油气资源、岩石圈尺度结构、构造及动力学特征等研究中，应用宽频磁传感器的电磁法探测为其重要工具之一。宽频磁传感器始终在向更宽应用频带、更高灵敏度及更低噪声水平方向发展，同时适用于阵列式电磁探测。本项目突破国际上电磁探测用磁传感器设计的传统思维，复用长直磁性材料磁滞回线特性，利用其双向饱和时间差测量超长周期磁场，利用其线性区某点及该点临域的相对磁导率作为磁放大器结合感应线圈测量中高频磁场，研究超宽频磁传感技术及其小型化问题。主要研究长直磁性材料磁通的空间分布及其与尺寸结构的关系，以优化磁滞回线形态；双向饱和式磁场测量与磁放大效应的感应式磁场测量二者灵敏度与噪声水平随频率的变化规律；基于随机共振的双向饱和式磁场测量精度统计规律分析；基于多径双斩波的感应式磁场测量的1/f噪声抑制及总体噪声优化；传感器精密自标定方法。最终实现可测量DC-10kHz超宽频弱磁信号的新型传感器。

中文关键词： 感应式磁传感器；RTD磁通门；磁滞复用；宽频带；低噪声

英文摘要： On the research of mineral resources in deep, oil and gas resources, scale and structure of the lithosphere and its features of dynamics, electromagnetic exploration is one of the important tools using broad frequency magnetic sensor. Broad frequency magnetic sensor is always developing towards the trends of more broad application frequency band,higher sensitivity, lower noise level and suitable for array electromagnetic exploration simultaneously. This project presents an approach to multiplexing the hysteresis loop features of magnetic material with the shape of long and straight, which break out the traditional thought on the magnetic sensor design for electromagnetic exploration. This project employs bidirectional saturation feature of hysteresis loop to measure super long period magnetic field. To measure magnetic field with middle or high frequency, relative magnetic permeability at the neighborhood of arbitrary point in linear working area of hysteresis loop is adopted as magnetic amplifier, combined with induction loop. The project will resolve the key problem of super broad frequency magnetic sensor and its miniaturization. The main researches are as following: Firstly, to optimization configuration of the hysteresis loop, the spatial distribution of the magnetic flux of long and straight magnetic mate

英文关键词： Induction Magnetometer；RTD fluxgate；Hysteresis multiplexing；Wide frequency band；low noise