首页 | 本学科首页   官方微博 | 高级检索  
     

一种基于高阶频率能量均值的扬声器异音故障诊断方法
引用本文:王红星,许增朴,周聪玲,祈宇明.一种基于高阶频率能量均值的扬声器异音故障诊断方法[J].天津轻工业学院学报,2010(6):46-50.
作者姓名:王红星  许增朴  周聪玲  祈宇明
作者单位:天津科技大学机械工程学院,天津300222
基金项目:天津市科技发展计划资助项目(06YFGPGX08900)
摘    要:对扫频信号激励的扬声器响应信号进行短时傅里叶变换,形成一幅二维时频图,按照各阶频率能量的分布,可将时频图划分为若干区域.为获得扬声器故障特征,对时频图的高阶频率区域的各列数值求取局部均值,将其均值分布用特征曲线描述,利用特征距离S则能够表现出被诊断扬声器与正常扬声器的差异,并由此作为扬声器异音故障诊断的依据.实验表明,该方法可显著提高诊断结果的可靠性.

关 键 词:扬声器  故障诊断  高阶频率  短时傅里叶变换

A Diagnosis Method for Loudspeaker Sound Fault Based on the Higher-Order Frequency Energy
WANG Hong-xing,XU Zeng-pu,ZHOU Cong-ling,QI Yu-ming.A Diagnosis Method for Loudspeaker Sound Fault Based on the Higher-Order Frequency Energy[J].Journal of Tianjin University of Light Industry,2010(6):46-50.
Authors:WANG Hong-xing  XU Zeng-pu  ZHOU Cong-ling  QI Yu-ming
Affiliation:(College of Mechanical Engineering,Tianjin University of Science & Technology,Tianjin 300222,China)
Abstract:Through short-time Fourier transform(STFT),a full cycle one-dimensional response signal of loudspeaker was converted into a two-dimensional time-frequency diagram,which presents the energy distribution of the signal.According to energy distribution,the time-frequency diagram was decomposed into several areas.In order to acquire fault features,the higher-order frequency area was transformed into a curve by computing every column mean energy.The higher-order frequency curve(HOFC)of the diagnosed loudspeaker was compared with the curve group of normal loudspeaker.Then,the fault loudspeaker was detected.Results show that this diagnosis method can improve the diagnosis reliability.
Keywords:loudspeaker  fault diagnosis  higher-order frequency  STFT
本文献已被 维普 等数据库收录!
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号