一种全相位FFT法的高精度相位测量仪设计  

Design of High-precision Phase Measuring Instrument Based on All Phase FFT Method

作　　者：徐巧玉[1] 刘锦霞 王军委 朱佩 黄梦彬[3] XU Qiaoyu;LIU Jinxia;WANG Junwei;ZHU Pei;HUANG Mengbin(Mechatronics Engineering School,Henan University of Science & Technology,Luoyang 471003,China;Luoyang GINGKO Technology Co.,Ltd.,Luoyang 471003,China;No.722 Research Institute of China Shipbuilding Industry Corp.,Wuhan 430205,China)

机构地区：[1]河南科技大学机电工程学院,河南洛阳471003 [2]洛阳银杏科技有限公司,河南洛阳471003 [3]中国船舶重工集团公司第七二二研究所,湖北武汉 430205

出　　处：《河南科技大学学报（自然科学版）》2019年第5期25-30,M0003,M0004,共8页Journal of Henan University of Science And Technology:Natural Science

基　　金：国家自然科学基金项目(51205108);河南省高等学校重点科研基金项目(15A535001)

摘　　要：针对传统相位测量仪结构复杂、精度低的缺点,提出了一种全相位快速傅里叶变换(FFT)法的高精度相位测量仪设计方案。该方案以高性能Cortex-M4内核的STM32F407VGT6作为系统核心,利用高速同步AD7606获取相位信号,采用高精度的全相位FFT法进行相位计算,并通过以太网接口实现数据的远程传输和显示。实验结果表明:采样点数取1 024,测相位为0°~360°,测频为1 Hz^60 kHz时,实际测量误差小于0.003°,响应时间小于1.0 s。To overcome low precision and complex structure of traditional phase measuring instrument,a highprecision phase measuring instrument based on all phase fast Fourier transform algorithm(FFT)was proposed.The STM32F407VGT6 with high performancec Cortex-M4 kernel was taken as the core of the system,and the phase signal was acquired by the high-speed synchronous analog-to-digital converter AD7606.The highprecision all-phase FFT was adopted to calculate the phase,and remote transmission and display of the data through the Ethernet interface were achieved in this scheme.The experimental results show that the actual error of measurement is less than 0.003 degree and the response time is less than 1.0 s when the sampling number is 1 024,the phase range is 0°~360°,and the frequency range is 1 Hz^60 kHz.

关 键 词：相位测量 全相位FFT法 高精度 以太网接口 

分 类 号：TP274[自动化与计算机技术—检测技术与自动化装置] TP273[自动化与计算机技术—控制科学与工程]