摘要
为了提高数字散斑相关方法(DSCM)在复合材料变形测量中的精度,将数字散斑技术与小波去噪技术相结合,采用阈值去噪法对小波系数进行阈值量化处理,并进行复合材料的拉伸试验,同时使用DSCM及引伸计进行测量,再使用该小波去噪法对DSCM测量的结果进行去噪,并与引伸计所测结果相比较。结果表明:去噪后的DSCM的测量结果与引伸计测量的结果吻合得更好,精度更高,说明该小波去噪法能够较好地去除数字散斑相关测量和计算中的噪声。
In order to improve the accuracy of deformation measurement with the Digital Speckle Correlation Method（DSCM） in composites, digital speckle technology is combined with wavelet denoising technology, and threshold denoising method is used to threshold quantification for wavelet coefficients. Then the tensile test of composites which is measured with DSCM and extensometer is performed, and this wavelet denoising method is used to the results of the measurement with DSCM. Finally, it shows that the results agree well with the meas- urement results of the extensometer. The wavelet denoising method can be used in the DSCM to eliminate the noises perferably.
出处
《航空工程进展》
2013年第2期247-251,共5页
Advances in Aeronautical Science and Engineering
关键词
小波去噪
数字散斑相关方法
复合材料
变形测量
wavelet denoising
Digital Speckle Correlation Method
composites
deformation measurement
