Abstract: In response to the urgent need for three-dimensional measurement of weak magnetic fields，this
study presents the design and development of a three-dimensional weak magnetic field measurement device
based on the Hall effect．The instrument integrates the high-precision BMM150 magnetic sensor and VL6180
distance sensor，combined with a spatial positioning module and signal processing circuitry，enabling precise
and real-time measurement of weak magnetic field vectors in three-dimensional space．Through bidirectional
iteration of theoretical modeling and experimental calibration，the sensitivity and stability of the sensor have
been significantly enhanced．The test results indicate that the device achieves a measurement range of ±1300 μT
for the x and y axes，and ±2047 μT for the z axis．The results of this study not only provide a portable and cost-
effective solution for weak magnetic field measurement，but also offer robust technical support and an
experimental platform for related teaching and research activities． Future work will further broaden the
application scenarios and functionalities．
张玉梅, 马文哲, 曹美嘉, 鄂元龙, 邓健男, 贾洪声 . 基于霍尔效应的三维微弱磁场测量装置[J]. 大学物理实验, 2026, 39(2): 78-81.
HANG Yumei, MA Wenzhe, CAO Meijia, E Yuanlong, DENG Jiannan, JIA Hongsheng . 3D Weak Magnetic Field Measurement System Based on Hall Effect. Physical Experiment of College, 2026, 39(2): 78-81.
