高精度数字特斯拉计设计  

Design of high precision digital Tesla meter

作　　者：肖鹏[1] 李龙[1] 余晓曦[1] 王巍[1] 白凌志[1] 廖欧 

机构地区：[1]中国测试技术研究院电子研究所,四川成都610021

出　　处：《传感器与微系统》2015年第3期120-122,129,共4页Transducer and Microsystem Technologies

基　　金：四川省科技支撑计划资助项目(2014GZ0001)

摘　　要：介绍了一种高精度、低成本的数字特斯拉计的系统结构。该仪器设计了高稳定度的恒流源驱动砷化铟霍尔传感器,采用自稳零、低噪声的放大器对信号进行拾取、放大、调理,对采集信号进行自适应调节放大倍数,得到的电压信号经A/D转换后利用曲线拟合技术对数据进行修正,从而保证在整个量程范围内的高精度和高分辨率。经检测和使用证明:该仪器稳定可靠,精度高。Introduce a high-precision,low-cost digital Tesla meter system architecture. The instrument is designed with high stability constant current source driver In As Hall sensors,using auto-zero,low noise amplifiers for signal pickup,amplification,conditioning,adaptive adjust magnification times,obtained voltage analog signal converts to digital signal by A / D conversion（ ADC）,then using curve fitting techniques for data correction,thus ensure entire range of high precision and high resolution. Testing and using prove that the instrument is stable,reliable and has high precision.

关 键 词：数字特斯拉计 霍尔效应 恒流源 放大器 最小二乘法 

分 类 号：TM936[电气工程—电力电子与电力传动]