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《Journal of Central South University(Science and Technology)》 2013-11
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Denoising processing on acoustic emission signals from underground metal mine rock by using improved EMD method

LUO Zhouquan;ZUO Hongyan;WU Chao;WANG Yiwei;School of Resource and Safety Engineering, Central South University;Commercial College, Hunan International Economics University;  
In order to improve measurement accuracy of acoustic emission signals from underground metal mine rock, an improved EMD method was put forward, which can be used to remove the noises from acoustic emission signals from underground metal mine rock. Noise removing process on the acoustic emission signals from underground metal mine rock by use of the improved EMD method could be expressed as follows: Firstly, acoustic emission signals from underground metal mine rock were decomposed into a series of IMFs by using empirical mode decomposition. Secondly,appropriate filter for filtering IMFs was selected when filter grade of filter group including high-pass filter, low-pass filter and band-pass filter was defined. Finally, remainder IMFs were used to reconstruct acoustic emission signals which noises from underground metal mine rock were removed. The results show that noise removing error based on the improved EMD method is small, and reconstructed acoustic emission energy rate signals can present true trend of acoustic emission energy rate signals from underground metal mine rock.
【Fund】: 国家自然科学基金资助项目(51274250);; 国家“十二五”科技支撑计划项目(2012BAK09B02-05)
【CateGory Index】: TD311
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