【摘要】 简述了二次谐波法磁通门磁强计的工作原理。以Ｎｉ 基磁性非晶材料取代坡莫合金作探头铁芯，应用相敏检波技术试制了一种磁通门磁强计，其探头体积小，灵敏度达到７ ．７ μＶ／ｎＴ，线性误差±１％ ，分辨率达到１ ｎＴ。更多还原

【Abstract】 The ring core magnetometer is used Ni-base amorphous ribbon to made magnetic core. The measuring electronics circuity is made up of phase sensitive detector and phase control unit. Drived by the best driving frequency and the best driving current,sensitivity 7.7 μV/T,linary error ±1%,resolution 1nT are measured.更多还原