模拟井水中接收的声发射信号波形特征
Waveform Characteristics of Acoustic Emission Signals through the Simulation System of Well Water
摘 要
采用全波形声发射信号分析仪接收由声波发生器在模拟水井底部激发的声发射(AE)信号，对其波形进行了时域分析、频域分析及小波变换，并与不经任何传播介质直接被接收的AE信号进行对比。结果表明，经模拟水井系统传播后，AE信号的幅度、振铃计数、总能量均明显下降，而持续时间则相对增加；两者经小波变换后的各分解层能量比例基本一致。
幅度
能量
时域分析
频域分析
小波变换
Acoustic emission signal
Amplitude
Energy
Time domain analysis
Frequency domain analysis
Wavelet transform
Abstract
The acoustic emission signal excited on the simulated well bottom and transmitted through the well water was received by using a full wave acoustic emission signal analyzer, and the time domain analysis, frequency domain analysis and wavelet transform were used to analyse these waveforms of the AE signals. These simulated AE signals were also compared with the signals directly received by the AE signal analyzer. The results showed that the amplitude, ringdown count, and the total energy of the simulated AE signals decreased obviously through the well simulation system, but the duration times was relatively increased. The energy ratio of each decomposed level for two kinds of the AE signals was consistent after the wavelet transform.
中图分类号 TG115.28
所属栏目 试验研究
基金项目
收稿日期 2013/1/15
修改稿日期
网络出版日期
作者单位点击查看
备注陈冲(1986-)，男，助理工程师，主要从事无损检测方面的研究。
引用该论文: CHEN Chong,Lv Zhen,LIU Bing,WANG Feng,KONG Xiang-Bin,LI Mu-Sen. Waveform Characteristics of Acoustic Emission Signals through the Simulation System of Well Water[J]. Nondestructive Testing, 2013, 35(9): 45～48
陈冲,吕震,刘兵,王风,孔祥斌,李木森. 模拟井水中接收的声发射信号波形特征[J]. 无损检测, 2013, 35(9): 45～48
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参考文献
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