高精度三维弱磁场测量仪

High precision 3-D weak magnetic field measurement instrument

考虑磁场的空间方向性,设计了高精度三维弱磁场测量仪。测量仪通过采用互相垂直的3对两两配对的集成线性霍尔传感器来获取空间三维磁感应强度信号,通过AT89S52单片机控制,系统可以测量空间中3个互相垂直方向上的磁场的磁感应强度和空间磁场绝对值。磁场测量仪测量精度为0.001mT,测量范围为±2mT,最大测量误差为5μT,具有测量精度高、数字化显示、操作简单、成本低等优点,可应用于高等学校大学物理实验亥姆赫兹线圈磁场测量实验。

Considered vector feature of magnetic field,a high precision 3-D weak magnetic field measurement instrument is designed.The instrument can obtain space 3-D magnetic induction intensity signal by three pairs of mutually perpendicular matched integrated linear Hall sensor.Controlled by microcontroller AT89S52,the instrument can measure either of three mutually perpendicular direction magnetic induction intensity in space,and the absolute value of space magnetic field.The measuring precision of magnetic field measurement instrument is 0.001 mT,and measuring range is ±2 mT;the maximum measuring error is 5μT.The instrument is of great precision,digital display,easy operation,low cost,and it can be applied to Helmholtz coil magnetic field measurement in the college physics experiment.