南京航空航天大学学报（英文版）2023，Vol.40Issue(z1)：118-128,11.DOI:10.16356/j.1005-1120.2023.S1.011
基于动态小波指纹的冰孔隙率测量方法研究
Ice Porosity Measurement Utilizing Dynamic Wavelet Fingerprint Technology
摘要
Abstract
In order to cope with the problem of ice porosity measurement in aircraft icing scenarios,an ultrasonic porosity measurement method based on dynamic wavelet fingerprint technology is proposed and evaluated.The propagation process of ultrasonic longitudinal waves is analyzed by theoretical model and finite element simulation,and the mechanism of the influence of pore size and other factors on porosity measurement is illustrated.Combined with 60 sets of ultrasonic measurement data of 20 ice samples,wavelet fingerprint images are generated,and 11-D key features are extracted.Based on the principal component analysis and polynomial fitting,the realized porosity measurement root mean square error(RMSE)reached 1.144%,which shows the proposed method is more stable and accurate than the traditional peak fitting method.关键词
冰孔隙率测量/孔隙分布/超声脉冲回波/传播模型/动态小波指纹Key words
ice porosity measurement/pore distribution/ultrasonic pulse echo/propagation model/dynamic wavelet fingerprint分类
通用工业技术引用本文复制引用
桂康,张亚博,葛俊锋,李仁府,叶林..基于动态小波指纹的冰孔隙率测量方法研究[J].南京航空航天大学学报（英文版）,2023,40(z1):118-128,11.基金项目
This work was funded by the Key Laboratory of Icing and Anti/De-icing of CARDC(No.IADL 20210202).The authors wish to thank Ms.Ivy and the anonymous reviewers for their valuable comments and suggestions which lead to an improvement of this paper. （No.IADL 20210202）
