基于MMC212xMG的电流传感器  

Current Sensor Based on Magnetic Sensor MMC212xMG

作　　者：熊显名[1] 莫荣军[1] 

机构地区：[1]桂林电子科技大学电子工程与自动化学院,广西桂林541004

出　　处：《仪表技术与传感器》2012年第9期3-5,23,共4页Instrument Technique and Sensor

摘　　要：针对传统电流测量方法精度不高、工艺复杂等问题,利用各向异性磁阻传感器MMC212xMG优异的磁场测量性能设计了一种高精度非接触式电流传感器。该电流传感器以磁场传感器MMC212xMG作为核心检测部件,ATmega32微控制器作为主控器,实时测量磁场数据,对数据进行滤波和计算后显示电流值。被测电流与磁场传感器MMC212xMG都处在密闭的坡莫合金屏蔽体内,有效避免外界磁场对电流磁检测过程的干扰。实验结果表明,该电流传感器具有精度高、非接触式测量、稳定性好、体积小等特点。For the accuracy of conventional current measurement methods is not high and their processes are complex, in the basis of the excellent magnetic field measurement performance of anisotropic magnetoresistive sensors MMC212xMG,one high-precision non-contact current sensor was designed. Taking the magnetic field sensor MMC212xMG as a core detecting component and ATmega32 microcontroller as a master, the sensor system detected magnetic field data in real-time, filtered the data and displayed the current value after mathematical operation. The measured current and magnetic field sensor MMC212xMG were in sealed per- malloy shielding body to avoid the interference of external magnetic field on current magnetic detection proeess effectively. Experi- mental results show that the system has the characteristics of high accuracy,non-contact measurement, good stability, and small size.

关 键 词：磁场传感器 电流传感器 非接触测量 电磁屏蔽 

分 类 号：TM933.1[电气工程—电力电子与电力传动]