Low speed impact monitoring based on 2-D beam focusing algorithm

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (3) : 28-34.

CHANG Qi, MENG Yao, YANG Weixi, LIU Jun

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Abstract

Impact damage monitoring is one of main research contents of structural health monitoring. In order to improve the accuracy of impact localization and the efficiency of sensor utilization, a 2-D beam focusing impact locating algorithm based on cross array sensor arrangement was proposed here. Under the premise of high precision, the number of sensors required by the traditional locating method was effectively reduced. With the method of cross array type piezoelectric sensor arrangement, the locating accuracy of the far field was greatly improved, and the 4-point arc locating algorithm was used for impact locating of the blind zone of the inner field, therefore, the impact locating precision of a whole large-scale plate structure was greatly improved. The effectiveness and practicability of the proposed method were verified with tests

Key words

impact damage monitoring / cross array / 2-D beam focusing algorithm / acoustic emission

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CHANG Qi, MENG Yao, YANG Weixi, LIU Jun. Low speed impact monitoring based on 2-D beam focusing algorithm[J]. Journal of Vibration and Shock, 2021, 40(3): 28-34

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