基于霍尔效应的位置传感系统设计
Design of Position Sensing System Based on Hall Effect
华国环 1李汪兴 1卢缘钦 1张其林 1吴礼福1
作者信息
- 1. 气象灾害预报预警与评估协同创新中心;南京信息工程大学电子与信息工程学院
- 折叠
摘要
磁敏位置传感系统广泛应用于汽车、高端装备和先进制造等领域中.文中设计了一种基于霍尔效应的位置传感系统,可以实现被测物旋转角度的检测.该系统通过由线性霍尔芯片和磁铁组成的传感模块获取旋转角度信息,经信号调理电路处理后由12 bit ADC采样转换为数字信号,FPGA读取数据并采用拟合、标准化等算法校准,再利用Cordic算法计算得到被测物旋转角度,最后通过串口屏将测量结果显示.测试结果表明该位置传感系统精度较高,测得的旋转角度误差小于2°.
Abstract
Magnetic sensitive position sensing system is widely used in automobile,high-end equipment and advanced manu-facturing.In this paper,a position sensing system based on Hall effect was designed,which can detect the rotation angle of the measured object.The system obtained the rotation angle information through a sensing module composed of a linear Hall chip and a magnet.After processing by a signal conditioning circuit,it was sampled by a 12-bit ADC and converted into a digital signal.The FPGA read the data and used algorithms such as fitting and standardization to calibrate,and then used the Cordic algorithm to calculate the rotation angle of the measured object,and finally displayed the measurement results through the serial port screen.The test results show that the position sensing system has high accuracy,and the measured rotation angle error is less than 2°.
关键词
霍尔效应/位置传感/模数混合信号调理/Cordic算法Key words
Hall effect/position sensing/analog-digital mixed signal conditioning/Cordic algorithm引用本文复制引用
出版年
2024
NETL
NSTL
万方数据