摘要
该文设计了基于LPC1114的谐波检测系统。利用芯片内置的A/D转换器对电压和电流信号进行高精度采样,根据加窗插值FFT算法对采样的数据进行分析,得到电压和电流信号的基波相位差以及各次谐波的幅值和频率。实验结果表明,本设计具有硬件实现简单、检测精度高等优点。
The harmonic detection system based on LPC1114 is designed in this paper.The high precision signals of current and voltage are sampled by using the A/D device with the built-in chip.After the sampling data is analyzed by the windowed interpola tion FFT algorithm,the frequency and amplitude of fundamental and harmonic wave for the current and voltage is got.The test re sults prove the virtues of this system with the simple hardware and the high precision.
出处
《电脑知识与技术(过刊)》
2013年第2X期1163-1165,共3页
Computer Knowledge and Technology
关键词
加窗差值
FFT
谐波分析
Interpolation algorithm
fast Fourier transform
harmonic analysis