摘  要：為實現具有密集頻譜的頻譜校正分離，通過研究基于復調制移頻和低通濾波器的傳統Zoom-FFT方法和頻譜校正方法，提出一種電流信號高準確度分離方法。該方法采用基于復解析帶通濾波器和復調制移頻的頻譜細化方法和比值校正法對電流信號進行頻譜細化校正，實現電流信號的高準確度分離。研究結果表明，該文采用的頻譜細化校正方法運算量小，計算速度快、準確度高，能夠實現電流信號的高準確度分離。

關鍵詞：電流信號；密集頻譜；頻率細化；頻譜校正

文獻標志碼：A     文章編號：1674-5124（2015）12-0111-04

High-precision separation technology of current signal based on

intensive spectrum correction

LEI Xiaoya1，2， LI Guizi1，2， ZHU Lin1，2， WANG Ji1，2

（1. Key Laboratory of Mechanical Product Testing and Technical evaluation，Lanzhou 730030，China；

2. Gansu Academy of Mechanical Sciences，Lanzhou 730030，China）

Abstract: To achieve the correction and separation of the spectrum that has dense spectrum， the spectrum correction， a high-precision separation method of the current signal has been proposed through studying the methods of traditional Zoom-FFT based on the multiple modulation frequency-shifting and low-pass filter. Methods of spectrum zoom based on the multiple analytical band-pass filter and multiple modulation frequency-shifting and the ratio correction have been used to realize the refinement and correction of the current signal. Finally， high-precision separation of current signal has been achieved. The results have shown that the methods of spectrum zoom and spectrum correction that this paper has used have less computing amount， the quick computing speed and high accuracy， and the high-precision separation of current signal can be achieved.

Keywords: current signals； intensive spectrum； spectrum zoom； spectrum correction