Study on Algorithms of Acoustic Emission Source Localization in Complicated Environment
When locating the rub-impact source of rotating machines by acoustic emission technology,precise time-difference of arrival is always not available to calculate the faults location due to the deteriorated signal correlation relationship among different sensors. This is caused by both the dispersion phenomenon since the acoustic emission signal includes various waveform modes while each type of waveform has different velocity in the complex rotor structure and intense noise influence inner the device. To solve this problem,generalized cross correlated time delay estimation(GCC-TDE) is introduced to calculate the time difference of arrival of emission signals. Segment correlation is adopted on the homologous emission signals of two sensors to resolve the no-peak problem in conventional correlation resulted from waveform distortion. The experiments showed that GCC-TDE of the acoustic emission signal in complex structure can reach satisfied results and correlation performance has been improved by segment correlation,thus enables higher location precision.
Acoustic Emission Location Generalized Cross Correlation Fractional Fourier Transform.
Aidong Deng Li Zhao Yan Zhao
National Engineering Research Center of Turbo-generator Vibration,Southeast university,Jiangsu Nanji School of Information Science and Engineering,Southeast University Jiangsu NanJing210096,China
国际会议
2009 9th International Conference on Electronic Measurement & Instruments(第九届电子测量与仪器国际会议 ICEMI2009)
北京
英文
1539-1543
2009-08-16（万方平台首次上网日期，不代表论文的发表时间）