介绍了HMC1001 型磁阻传感器工作的原理,阐述了它在弱磁检测中的地位,设计了在标准线圈中心磁场测量中单片机最小应用系统,给出了测试结果。 关键词: 磁阻式传感器; 线圈; 桥; 弱磁检测 Abstract : Working principle of magnetoresistive sensor is introduced and its statue in weak magnetic field de2 tecting is discussed. A single chip processor’minimal application system in measuring center magnetic field of a standard coil is designed ,the measuring result is given and the common analysis is made. Key words : magnetoresistive sensor ; coil ; bridge ; weak magnetics detect