基于巨磁阻抗效应的新型微磁近感探测技术  

Novel Micro-magnetism Detection Based on Grant Magneto-impedance Effect of Amorphous Wire and Resonant Circuit

作　　者：孙骥[1] 邓甲昊[1] 高珍[1] 宋崧[1] 

机构地区：[1]北京理工大学宇航科学技术学院,北京100081

出　　处：《仪表技术与传感器》2009年第4期93-96,共4页Instrument Technique and Sensor

基　　金：国家自然科学基金资助项目(60874100);航天科技创新基金项目(CAST200834);总装预研基金项目(9140A01010109BQ0116)

摘　　要：在分析FeCoS iB材料的非晶丝物理特性和巨磁阻抗效应的基础上,通过对现有磁传感器电路具体形式和算法的改进,设计了基于非晶丝巨磁阻抗效应和谐振桥路的新型微磁传感器探测电路,保证了系统的高灵敏度、快速响应及低功耗等特性。同时,基于巨磁阻抗理论,提出了用非晶丝微磁传感器取代普通磁性元件,并采用DSP+CPLD进行数据处理的方法,确保电路的实时性,为今后微磁近感技术在电子探测和定位方面的改善与提高提供了技术支撑。A novel sensor（ detection technology）with detection and signal processing circuit of micro-magnetic physical fields was proposed. The approach was based on the physical characteristics of FeCoSiB amorphous wires, the theory of giant magneto-impedance effect and resonant circuit. By the improvement of forms and algorithms of used magnetic sensor, the circuit ensured the characteristics of high sensitivity, high detection precision, fast response and small power consumption. For the integration of decision rules and taking CPLD as core chip,the signal processing circuit which not only improved the identification ability of pseudo ferromagnetic objects and ensured the real-rime response velocity of systems is the foundation of the proposed sensor （detection technology） in military and civil service.

关 键 词：GMI效应 磁传感器 非晶丝 铁磁目标探测 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]