基于磁阻传感器的铁磁体探测系统设计  

Ferromagnetic detection system based on magnetic resistance sensors

作　　者：胡冠华[1] 赵晶亮[1] 张波涛[1] 薛丹丹[1] 

机构地区：[1]中北大学电子测试技术国家重点实验室,山西太原030051

出　　处：《传感器世界》2011年第8期26-29,共4页Sensor World

基　　金：国防重点实验室基金资助项目(项目编号:9140C1204051010)

摘　　要：简要介绍了铁磁体在地磁场中的模型,针对磁异信号的检测,设计了一种基于各项异性磁阻传感器的三轴测试系统。硬件电路主要包括:磁阻传感器、置位/复位电路、信号调理电路、A/D转换电路及控制电路。该系统由Honeywell公司HMC1001和1002组成三轴测量传感器,利用FPGA作为控制器实现对磁异信号的采集。试验结果表明,系统能够对移动目标铁磁体进行有效检测,并可达到较高的检测精度。The model of ferromagnetic in geomagnetic field is introduced briefly. For the detection of magnetic anomaly, a three-axis test system based on anisotropic magnetoresistive sensors is designed in this paper. The hardware circuits include magnetometer, set/reset pulse circuit, signal conditioning circuit, A/D converting circuit and control circuit. This three-axis measuring sensor system consists of HMC1001 and HMC1002 from Honeywell, and use FPGA as controller for signal acquisition of magnetic anomaly. The tests result show that the system can detect moving ferromagnetic target effectively and achieve high precision.

关 键 词：铁磁体 磁异信号 各向异性磁阻传感器 

分 类 号：TM936[电气工程—电力电子与电力传动] TP212.13[自动化与计算机技术—检测技术与自动化装置]