Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition

This work present the application of Empirical Mode Decomposition (EMD) to analyze the air borne acoustic signatures commenced during welding process. In order to achieve goals, bead-on plate welding was done onto the carbon steel specimen using Metal Inert Gas Welding. At the same moment, the micro...

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Main Authors:	Mohd Fadhlan, Mohd Yusof, M., Ishak, M. F., Ghazali, M. R., Islam
Format:	Article
Language:	English
Published:	Trans Tech Publications, Switzerland 2014
Subjects:	TJ Mechanical engineering and machinery
Online Access:	http://umpir.ump.edu.my/id/eprint/9513/ http://umpir.ump.edu.my/id/eprint/9513/ http://umpir.ump.edu.my/id/eprint/9513/ http://umpir.ump.edu.my/id/eprint/9513/1/Analysis%20of%20an%20Air%20Borne%20Acoustic%20Signatures%20from%20Welding%20Process%20Using%20Empirical%20Mode%20Decomposition.pdf

id	oai:umpir.ump.edu.my:9513
recordtype	eprints
spelling	oai:umpir.ump.edu.my:95132018-01-12T01:29:24Z http://umpir.ump.edu.my/id/eprint/9513/ Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition Mohd Fadhlan, Mohd Yusof M., Ishak M. F., Ghazali M. R., Islam TJ Mechanical engineering and machinery This work present the application of Empirical Mode Decomposition (EMD) to analyze the air borne acoustic signatures commenced during welding process. In order to achieve goals, bead-on plate welding was done onto the carbon steel specimen using Metal Inert Gas Welding. At the same moment, the microphone with operating frequency of 31.5 Hz to 8 kHz used to collect air borne acoustic signatures. In analysis part, Empirical Mode Decomposition has been applied to the acoustic signals and the selected Intrinsic Mode Function (IMF) was presented in frequency-distance plot using spectrogram. Based on the analysis results, there were 3 significant IMF has been found. Those were IMF mode 3, mode 5 and mode 8 which lie within the frequency of 1500 Hz to 4500 Hz, 200 Hz to 800 Hz, and 40 Hz to 80 Hz respectively. The frequency-distance plot from spectrogram of IMF mode 3 showed a significant pattern which can be related with the discontinuity of welding. The discontinuity appears wherever low amplitude power detected in the frequency-distance plot of IMF mode 3. Moreover, the frequency-distance plot of IMF mode 5 and mode 8 can be significantly related with the spatter and weld pool oscillation condition. High power amplitude in frequency-distance plot of IMF mode 8 can indicates the offset of weld pool oscillation frequency and cause the existence of higher amount of spatter which resulting the high power amplitude in frequency-distance plot of IMF mode 5. In summary, it can be conclude that the application of EMD in the analysis of air borne acoustic signatures allow the detection of several phenomena in welding process which might lead to defect once in a time. This was found to be significant in the process of developing the online welding quality monitoring. Trans Tech Publications, Switzerland 2014 Article PeerReviewed application/pdf en http://umpir.ump.edu.my/id/eprint/9513/1/Analysis%20of%20an%20Air%20Borne%20Acoustic%20Signatures%20from%20Welding%20Process%20Using%20Empirical%20Mode%20Decomposition.pdf Mohd Fadhlan, Mohd Yusof and M., Ishak and M. F., Ghazali and M. R., Islam (2014) Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition. Advanced Materials Research, 889 (890). pp. 770-775. ISSN 1022-6680 (print), 1662-8985 (online) http://www.scientific.net/AMR.889-890.770 DOI: 10.4028/www.scientific.net/AMR.889-890.770
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Malaysia Pahang
building	UMP Institutional Repository
collection	Online Access
language	English
topic	TJ Mechanical engineering and machinery
spellingShingle	TJ Mechanical engineering and machinery Mohd Fadhlan, Mohd Yusof M., Ishak M. F., Ghazali M. R., Islam Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition
description	This work present the application of Empirical Mode Decomposition (EMD) to analyze the air borne acoustic signatures commenced during welding process. In order to achieve goals, bead-on plate welding was done onto the carbon steel specimen using Metal Inert Gas Welding. At the same moment, the microphone with operating frequency of 31.5 Hz to 8 kHz used to collect air borne acoustic signatures. In analysis part, Empirical Mode Decomposition has been applied to the acoustic signals and the selected Intrinsic Mode Function (IMF) was presented in frequency-distance plot using spectrogram. Based on the analysis results, there were 3 significant IMF has been found. Those were IMF mode 3, mode 5 and mode 8 which lie within the frequency of 1500 Hz to 4500 Hz, 200 Hz to 800 Hz, and 40 Hz to 80 Hz respectively. The frequency-distance plot from spectrogram of IMF mode 3 showed a significant pattern which can be related with the discontinuity of welding. The discontinuity appears wherever low amplitude power detected in the frequency-distance plot of IMF mode 3. Moreover, the frequency-distance plot of IMF mode 5 and mode 8 can be significantly related with the spatter and weld pool oscillation condition. High power amplitude in frequency-distance plot of IMF mode 8 can indicates the offset of weld pool oscillation frequency and cause the existence of higher amount of spatter which resulting the high power amplitude in frequency-distance plot of IMF mode 5. In summary, it can be conclude that the application of EMD in the analysis of air borne acoustic signatures allow the detection of several phenomena in welding process which might lead to defect once in a time. This was found to be significant in the process of developing the online welding quality monitoring.
format	Article
author	Mohd Fadhlan, Mohd Yusof M., Ishak M. F., Ghazali M. R., Islam
author_facet	Mohd Fadhlan, Mohd Yusof M., Ishak M. F., Ghazali M. R., Islam
author_sort	Mohd Fadhlan, Mohd Yusof
title	Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition
title_short	Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition
title_full	Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition
title_fullStr	Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition
title_full_unstemmed	Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition
title_sort	analysis of an air borne acoustic signatures from welding process using empirical mode decomposition
publisher	Trans Tech Publications, Switzerland
publishDate	2014
url	http://umpir.ump.edu.my/id/eprint/9513/ http://umpir.ump.edu.my/id/eprint/9513/ http://umpir.ump.edu.my/id/eprint/9513/ http://umpir.ump.edu.my/id/eprint/9513/1/Analysis%20of%20an%20Air%20Borne%20Acoustic%20Signatures%20from%20Welding%20Process%20Using%20Empirical%20Mode%20Decomposition.pdf
first_indexed	2018-09-07T01:15:51Z
last_indexed	2018-09-07T01:15:51Z
_version_	1610909432423645184

Analysis of an Air Borne Acoustic Signatures from Welding Process Using Empirical Mode Decomposition

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