计算机工程与应用2012，Vol.48Issue(13)：1-4,21,5.DOI:10.3778/j.issn.1002-8331.2012.13.001
碳纤维复合材料缺陷的小波包分析
Analysis of carbon fiber composite defects based on wavelet packet transform
摘要
Abstract
Ultrasonic phased array inspection system is used to test carbon fiber composite experiment panels which contain three kinds of defects such as crack, inclusion and delamination. The collected signals of defects are analyzed by wavelet packet transform. The measure of separability based on distance is proposed as the criterion of evaluation of the wavelet bases to determine the optimum wavelet base. Then the signals of three types of defects are decomposed and reconstructed by wavelet packet transform using sym8 wavelet. And the energy features of all types of defects are extracted by the "frequency-energy" method. The results indicate that this method has a good effect on identifying the categories of carbon fiber composite defects, which provides a basis for automatic identification of defects.关键词
小波包/超声相控阵/碳纤维复合材料/可分性测度Key words
wavelet packet/ ultrasonic phased array/ carbon fiber composite/ measure of separability分类
信息技术与安全科学引用本文复制引用
孙芳,曾周末,靳世久,詹湘琳..碳纤维复合材料缺陷的小波包分析[J].计算机工程与应用,2012,48(13):1-4,21,5.基金项目
国家自然科学基金(No.61102097) （No.61102097）
高等学校博士学科点专项科研基金(No.20100032110057) （No.20100032110057）
天津市高等学校科技发展基金计划项目(No.20100412) （No.20100412）
天津市科技计划项目(No.11ZCGHHZ00700). （No.11ZCGHHZ00700）
