基于非晶丝巨磁阻抗效应的微磁场探测系统

摘要

To tackle the deficiency of traditional magnetic detecting means cannot satisfy the fuse small volume, high sensibility and low power cost requirement, the detecting system based on GMI is proposed in this thesis. The electronic flow signal designed posesses extremely low static power consumption, and the negtive inner feedback system induced compensate the GMI effect, that improves the performance of sensor. The system design programme is completed with double amplifier unit. the physical detecting system occupy the superiority of GMI. The experiment shows, the micro-magnetic detecting system based on GMI design, which has a terrific detecting ability that can be applied to magnetic detecting on radar fuse.%针对传统磁探测方法不能满足引信探测体积小，高灵敏度和低功耗等要求的问题，本文提出了基于非晶丝巨磁阻抗效应的微磁场探测系统，是设计励磁电流信号产生电路具备极低的静态功耗，引入负反馈闭环系统对非晶丝磁滞特性进行了抑制补偿，提高了传感器的性能；采用双放大单元组合方案实现高性能的信号处理电路，完成了整体系统的设计。所设计的微磁场探测系统具备了非晶丝巨磁阻抗效应的优势，测试表明，基于非晶丝巨磁阻抗效应设计实现的微磁场探测系统，具备良好微磁探测性能，可应用于近炸引信进行微磁场探测。