基于差分振子检测微弱信号的特性研究  

Research on Weak Signal Detection based on Differential Oscillator

作　　者：刘燕 LIU Yan(Mechanical and Electronic Engineering Research Center for Coal Mine, Suzhou University, Suzhou, 234002, China)

机构地区：[1]宿州学院机械与电子工程学院,安徽宿州234002

出　　处：《泰山学院学报》2017年第6期97-101,共5页Journal of Taishan University

基　　金：安徽省高校自然科学研究项目(KJ2016A776);宿州学院煤矿机械与电子工程研究中心开放课题资助项目(2014YKF16)

摘　　要：差分振子法是一种可视化的检测方法,通过辨识差分振子相图状态来判定待测信号中是否存在待检测频率.往往输入信号不是单一信号或者是有相位的信号,这就要求相位和多频率信号不会引起差分振子相图的改变.本文就是从这两面分析差分振子的敏感性,结合欧氏距离更直观的提取复合频率的单一频率,并提出了最优解的信号频率提取方法.The differential oscillator method is a kind of visual detection method,which can be used to determine whether there is a frequency to be detected in the signal to be measured.The input signal is either a single signal or a phase signal,which requires that the phase and multi frequency signals do not cause the phase change of the differential oscillator.In this paper,we analyze the sensitivity of the differential oscillator from the two sides,and combine the Euclidean distance to extract the single frequency of the composite frequency more directly,and put forward the optimal solution method to extract the signal frequency.

关 键 词：复合频率信号 差分振子 欧氏距离 最优解 

分 类 号：TH133[机械工程—机械制造及自动化] TP274[自动化与计算机技术—检测技术与自动化装置]