（1.吉林大学 仪器科学与电气工程学院，长春 130022）
摘要：本文基于对消法原理设计一种阻带范围为1kHz-3kHz的数控陷波器。以FPGA为平台构建数字信号的实时测量模块，以ARM为核心构成陷波器控制模块。采用信号追踪的方法，获得干扰信号的频率、相位以及幅值的参数值。实验结果表明，对于频率范围1kHz-3kHz、幅值范围100mV-1V的单频正弦干扰信号，数控陷波器能够产生无频差,幅度相对误差小于1%，相位误差小于0.4°的对消信号。该数控陷波器对于1kHz-3kHz范围内的工频谐波干扰有很好的抑制效果。
关键词：对消法、FPGA、ARM、信号追踪、工频谐波干扰
中途分类号： 文献标识码：
The Design of the High Precision Numerical Control Trap Based on the Elimination
QIAN Cheng-hui1;WANG Jun1;LI Qi1;SHI Zhao-Min1;XU Qian1
(1.College of Instrumentation and Electrical Engineering, Jilin University, Changchun 130022,China)
Abstract: Based on the principle of elimination, we design a numerical control trap whose range of stop band is 1 kHz~ 3 kHz. The real-time measurement module of digital signal is built based on the FPGA platform, and the trap control module is structured taken ARM as the core. Adopting the method of signal tracking, we obtain the parameters of the jamming signal frequency phase and amplitude values. The experimental results show that to the single-frequency sinusoidal interference signal which has the frequency range of 1kHz~3kHz and amplitude range of 100 mV ~1V, numerical control trap can produce cancellation signal without frequency offset, and the amplitude of relative error is less than 1%, the phase error is less than 0.5 °. The numerical control trap has very good effect on harmonic power frequency interference which has the frequency range of 1kHz~3kHz.
Keywords: the principle of elimination, FPGA, ARM, signal tracking, harmonic power frequency interference
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作者简介：
千承辉（1975-），女，吉林汪清人，博士，工程师，实验室副主任，研究方向为传感器与智能仪器研究.
王君（1955-），男，山东乳山人，教授，研究方向为传感器与智能仪器研究.
