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在FeCoSiB非晶丝材料物理特性基础上,利用Fourier解析法对非晶丝的巨磁阻抗效应展开分析,对它的数学模型进行实验验证;进而探讨基于非晶丝传感元件的高灵敏度微磁物理场探测技术及电路实现途径,并以CPLD芯片为核心设计信号处理电路。实验结果证明:传感器在0～60μT的量程内具有较好的线性度,其分辨率可达0.1μT。这就解决了大多数磁传感器对地磁场、生物磁场等微弱物理量无法精确探测的缺陷,从而拓宽了磁传感器在微电子探测领域的适用范围。
Based on the physical properties of FeCoSiB amorphous materials, Fourier analysis was used to analyze the giant magneto-impedance effect of amorphous wires and the experimental verification was carried out on the mathematical model of FeCoSiB amorphous wires. Then the high-sensitivity micro-magnetic Physical detection technology and circuits to achieve ways and to CPLD chip design as the core signal processing circuit. The experimental results show that the sensor has a good linearity in the range of 0 ~ 60μT with a resolution of 0.1μT. This solves the majority of magnetic sensors on the geomagnetic field, bio-magnetic field and other weak physical parameters can not be accurately detected defects, thus broadening the magnetic sensor in the field of micro-electronic detection of the scope of application.