基于振动声调制的微裂纹定位成像研究

doi:10.3969/j.issn.1000-1158.2020.02.15

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Abstract In order to accurately identify micro-cracks in metal components, a localization imaging method combining vibration acoustic modulation technology and delay superposition algorithm is proposed. By introducing the basic principle, the finite element software is used to simulate the vibration and acoustic modulation of the aluminum plate model with rectangular micro-cracks, and the non-linear damage signal is extracted as the pixel feature. The location imaging is carried out by using the delay superposition algorithm, and the influencing factors of the imaging are analyzed. In the experiment, a vibration acoustic modulation detection system was set up to locate the circular micro-cracks in the aluminum plate, which verified the feasibility of the above method. The results show that the imaging results are basically consistent with the original crack position on the aluminum plate, indicating that the positioning imaging method can effectively locate the micro-cracks.

Key words： metrology micro crack location vibro-acoustic modulation time-delay superposition algorithm localization imaging

Received: 02 April 2019 Published: 17 February 2020

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TB95

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	Articles by authors
	LING Tian-hao
	ZHENG Hui-feng
	HE Hong-ru
	HU Liu-chen
	CAO Yong-gang

Cite this article:

LING Tian-hao,ZHENG Hui-feng,HE Hong-ru, et al. Research on Micro-crack Localization Imaging Based on Vibro-acoustic Modulation[J]. Acta Metrologica Sinica, 2020, 41(2): 214-220.

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http://jlxb.china-csm.org:81/Jwk_jlxb/EN/10.3969/j.issn.1000-1158.2020.02.15 OR http://jlxb.china-csm.org:81/Jwk_jlxb/EN/Y2020/V41/I2/214

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