The pulse exciting source and its application in electromagnetic acoustic emission

Zhang Chuang; Li Fubiao; Liu Suzhen; Cai Zhichao; Xiao Yang

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The pulse exciting source and its application in electromagnetic acoustic emission

Zhang Chuang *,Li Fubiao #,Liu Suzhen,Cai Zhichao,Xiao Yang

Province-Ministry Joint Key Laboratory of Electromagnetic Field and Electrical Apparatus Reliability Hebei University of Technology Tianjin 30013 China

*Correspondence author

#Submitted by

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Funding: The Excellent Youth Foundation of Hebei Educational Commission （No. No. Y2012006）, National Natural Science Foundation of China （No.No. 51307043)）, The Research Fund for the Doctoral Program of Higher Education of China （No.No. 20121317120002)）

Opened online: 5 November 2015

Accepted by: none

Citation: Zhang Chuang,Li Fubiao,Liu Suzhen.The pulse exciting source and its application in electromagnetic acoustic emission[OL]. [ 5 November 2015] http://en.paper.edu.cn/en_releasepaper/content/4659531

Electromagnetic loading in the metal structures will produce stress wave signal at the edge of the crack and this phenomenon can be used in nondestructive testing of metal defects. As the core of electromagnetic load, the output parameters of the exciting source, such as current frequency and amplitude, have a significant impact on loading effect. For the loading demand of the electromagnetic acoustic emission (EMAE), using the energy storage of the capacitor, the pulse high current which the EMAE needs can be achieved by capacitor discharging instantaneous. It designs the adjustable regulated power supply based on semi-bridge switching circuit principle. The parameter display and adjustment module can be achieved based on the single-chip system. Applying to the EMAE experiment, it can reach the expected target.?????

Keywords:electromagnetic load; pulse excitation source; capacitor discharging; electromagnetic acoustic emission?????

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