Multi-scale analysis of acoustic emission signals in dense-phase pneumatic conveying of pulverized coal at high pressure

AIChE Journal ◽  
2016 ◽  
Vol 62 (8) ◽  
pp. 2635-2648 ◽  
Author(s):  
Lelu He ◽  
Yao Yang ◽  
Zhengliang Huang ◽  
Zuwei Liao ◽  
Jingdai Wang ◽  
...  
Keyword(s):  
High Pressure ◽  
Acoustic Emission ◽  
Pulverized Coal ◽  
Scale Analysis ◽  
Pneumatic Conveying ◽  
Dense Phase ◽  
Multi Scale ◽  
Multi Scale Analysis

scholarly journals Effect of properties of pulverized coal on dense phase pneumatic conveying at high pressure

2009 ◽  
Vol 147 ◽  
pp. 012060
Author(s):  
Chen Xiao-ping ◽  
Zhou Yun ◽  
Liang Cai ◽  
Meng Qing-min ◽  
Lu Peng ◽  
...  
Keyword(s):  
High Pressure ◽  
Pulverized Coal ◽  
Pneumatic Conveying ◽  
Dense Phase

Numerical simulation on dense phase pneumatic conveying of pulverized coal in horizontal pipe at high pressure

2010 ◽  
Vol 65 (8) ◽  
pp. 2500-2512 ◽  
Author(s):  
Wenhao Pu ◽  
Changsui Zhao ◽  
Yuanquan Xiong ◽  
Cai Liang ◽  
Xiaoping Chen ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
High Pressure ◽  
Pulverized Coal ◽  
Pneumatic Conveying ◽  
Dense Phase ◽  
Horizontal Pipe

Burst-Type Acoustic Emission Source Localization Based on Multi-Scale and Multi-Sensors

2013 ◽  
Vol 380-384 ◽  
pp. 2954-2957
Author(s):  
Xiao Tao Zhang ◽  
Li Wei Tang ◽  
Ping Wang ◽  
Xing Xing Han ◽  
Shi Jie Deng
Keyword(s):  
Acoustic Emission ◽  
Time Delay ◽  
Source Localization ◽  
Acoustic Emission Signal ◽  
Emission Source ◽  
Scale Analysis ◽  
Emission Signal ◽  
Multi Scale ◽  
Acoustic Emission Source ◽  
Multi Scale Analysis

For the burst-type acoustic emission signal, time delay estimation of two sensors calculated by signal cross-correlation is not accurate, and it leads the source localization results is not also accurate. A new method is proposed to improve accuracy of source localization results based on multi-scale analysis and multi-sensors. Acoustic emission signal multi-scale analysis using wavelet transform, then the most accurate time delay is selected in sub-band of signal multi-scale analysis by multi-sensors time delay vector close rule. Finally, the simulation acoustic emission source localization experiment has high accuracy.

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