Research of the Phase Sensitive Detection Property of Magnetic Sensor Based on Hall Effect  

霍尔效应磁传感器的相敏特性研究

作　　者：陈金岳[1] 周立伟[1] 丁守谦[1] 李文深[1] 

机构地区：[1]北京理工大学光电工程系,南开大学电子系

出　　处：《Journal of Beijing Institute of Technology》1998年第1期32-38,共7页北京理工大学学报（英文版）

摘　　要：Aim to detect the characteristic weak magnetic field signal against the strong noises background. Methods In combination with a low-pass-filter, the correlation output of magne-* tic sensors between the magnetic field and reference current was utilized to provide a DC output voltage proportional to the applied magnetic induction, computer simulation was* done to investigate the correlation output of the Hall-effect sensors. Results Some analysis results concerning the noise property, harmonic supppression and the sensitivity were given. Conclsion The minimum detection signal of the equipment evolved from the mentioned cor-* relation theory can be 10-6 T. In addition to the DC output, such sensors can also measure the phase of the detected magnetic induction and has good harmonic suppression as well as* noise elimination.检测强噪声背景中的微弱特征磁场信号，方法通过和低通滤波器相结合，利用磁传感器所产生的磁场信号和参考控制电流的相关输出，给出正比于待测磁场信号的直流输出电压。＊用计算机对霍尔传感器进行模拟。结果给出了有关噪声特性、谐波抑制和灵敏度的理论结果。＊结论由上述理论演变而成的仪器其最小可测磁场为１０－６Ｔ。除了直流输出之外，此类具有磁电相＊乘功能的传感器还可测量待测磁场信号的相位，并有良好的谐波抑制和噪声去除能力。

关 键 词：CORRELATION Hall magnetic sensor phase sensitive detection* 

分 类 号：TP212[自动化与计算机技术—检测技术与自动化装置]