（1.吉林大學 儀器科學與電氣工程學院，長春 130022）
摘要：本文基于對消法原理設計一種阻帶范圍為1kHz-3kHz的數控陷波器。以FPGA為平臺構建數字信號的實時測量模塊，以ARM為核心構成陷波器控制模塊。采用信號追蹤的方法，獲得干擾信號的頻率、相位以及幅值的參數值。實驗結果表明，對于頻率范圍1kHz-3kHz、幅值范圍100mV-1V的單頻正弦干擾信號，數控陷波器能夠產生無頻差,幅度相對誤差小于1%，相位誤差小于0.4°的對消信號。該數控陷波器對于1kHz-3kHz范圍內的工頻諧波干擾有很好的抑制效果。
關鍵詞：對消法、FPGA、ARM、信號追蹤、工頻諧波干擾
中途分類號： 文獻標識碼：
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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作者簡介：
千承輝（1975-），女，吉林汪清人，博士，工程師，實驗室副主任，研究方向為傳感器與智能儀器研究.
王君（1955-），男，山東乳山人，教授，研究方向為傳感器與智能儀器研究.
