光栅条纹投影轮廓测量中包裹相位的小波模极大值展开法  

Wavelet Modulus Maxima Expanding Method of Wrapping Phase in Grating Fringe Projecting Contour Measurement

作　　者：殷金泉 黄频波[2] 付成龙 YIN Jinquan;HUANG Pinbo;FU Chenglong(Ganzhou Special Equipment Supervision and Inspection Center,Ganzhou 341000,China;Applied Research Center of Advanced Composite Manufacturing Technology,Chengdu Aeronautic Polytechnic,Chengdu 610100,China)

机构地区：[1]赣州市特种设备监督检验中心,江西赣州341000 [2]成都航空职业技术学院复合材料成型技术应用研究中心,成都610100

出　　处：《无损探伤》2020年第5期10-15,共6页Nondestructive Testing Technology

基　　金：四川省教育厅自然科学重点项目(17ZA0018);成都航空职业技术学院自然科学项目(061652Y);江西省市场监督管理局科技项目(GSJK201920)。

摘　　要：光栅条纹投影轮廓测量是一种非接触式的光学无损检测方法,适用于工业产品的表观质量评价。本文提出光栅条纹投影轮廓测量中包裹相位的小波模极大值展开法。主要利用小波模极大值法确定截断相位中相位跳变点的位置,并补偿相位使其连续完成展开。结果表明小波模极大值展开方法可行,并具有良好的抗噪能力,同时可以结合小波阈值降噪完成含高噪声的轮廓相位重建。文中讨论了小波阈值降噪会降低相位跳变点的奇异性而引起不利影响。Grating fringe projection profile measurement is a non-contact optical non-destructive testing method,which is suitable for the apparent quality evaluation of industrial products.A wavelet modulus maxima expanding method of wrapping phase in grating fringe projecting contour measurement is proposed in this paper.The wavelet modulus Maxima method is mainly used to determine the position of the phase saltation point in truncated phase.And then compensating phase,continuous phase can be achieved.The results show that the wavelet modulus maxima expanding method is feasible and owns good anti-noise ability.Furthermore,the contour phase reconstruction with high noise is accomplished according to combining wavelet threshold de-noising method.Finally,it is discussed that wavelet threshold de-noising method will reduce the singularity of phase saltation points and cause adverse effects.

关 键 词：相位展开 小波模极大值 相位跳变点 奇异性 

分 类 号：TG115.28[金属学及工艺—物理冶金]