基于STM32的正弦波失真度测量仪的设计  

Design of Sine Wave Distortion Meter Based on STM32

作　　者：王瑞轩 盖怡臣 李鸿博 孙艳丽 王国庆 WANG Rui-xuan;GAI Yi-chen;LI Hong-bo;SUN Yan-li;WANG Guo-qing(Naval Aviation University,Yantai 264001 China)

机构地区：[1]海军航空大学,山东烟台264001

出　　处：《自动化技术与应用》2023年第6期9-12,共4页Techniques of Automation and Applications

摘　　要：针对模拟控制正弦波失真度测量仪精度低,计算复杂等缺点,设计基于STM32的数字化计算波形失真度测量仪。该系统信号经AD采样后,通过STM32计算快速傅里叶变换(FFT),再根据采样率确定谐波分量点并计算失真度,并运用Matlab仿真对FFT结果进行理论验证。通过与方波、三角波失真度理论值比较,该失真度测量仪误差较低,可靠性高。In view of the low precision and complicated calculation of the analog control sine wave distortion measuring instrument,a digital method based on STM32 is designed to calculate waveform distortion.The signal of the system is sampled by AD and the fast Fourier transform(FFT) is calculated by STM32,and then the harmonic component points are determined according to the sampling rate and the distortion is calculated.Matlab simulation is used to verify the FFT results.Compared with the distortion values of square wave and triangular wave,the distortion measuring instrument has low error and high reliability.

关 键 词：失真度测量 STM32 快速傅里叶变换 数字谐波分析 

分 类 号：TP216[自动化与计算机技术—检测技术与自动化装置] TP335.1[自动化与计算机技术—控制科学与工程]