基于FPGA和霍尔效应的高精度数字式角度测量系统

High Accuracy Digital Angle Measurement System Based on Hall Effect and FPGA

摘要:

转轴的角度是旋转机械工作时的一项重要参数,由此提出了一种新的高精度数字式角度测量系统,主要包括霍尔传感器、信号处理模块和数据处理模块,其中霍尔传感器将角度信号转化成两路具有相位差的电信号；信号处理模块将两路电信号经过整形后,采用高频脉冲插值计数的方法,获取两路电信号相位差内和周期内的脉冲总数；数据处理模块最终将脉冲数转化成角度值,并显示出来;通过实验验证,表明该数字式角度测量系统具有较高的测量精度,可达0.01°,并对实验结果进行了分析。

Abstract:

The shaft angle is an important parameter for rotating machinery, a new high precision digital micro-angle measuring system is proposed in this paper. The angle measurement system is proposed mainly by hall sensors, signal processing module and data processing module, angle signal is converted into two signals with phase difference by hall sensors; then these two signals are rectified through signal processing module, the pulses number in phase difference of two signal and cycle are obtained through high frequency pulses interpolation; finally, the pulses number are changed into the angle value by data processing module, and also be displayed. According to the experiments results, the accuracy of digital angle measuring system can reach 0.01°, the experiments results are analyzed.