Based on interpolating windowed FFT to achieve the data acquisition module in electricity network monitoring meter

摘要

This paper have made improvements on the traditional electricity network monitor data acquisition module. Due to spectral leakage and barrier effect in FFT, the thesis chose interpolating windowed FFT to process the data, and transplant the algorithm to microcontroller LPC2138. Every frequency harmonic wave's amplitude and frequency were calculated precisely, including the total harmonic distortion.