本项目应用TDI-CCD和Linescan数字云纹技术对运动物体的三维形变及缺陷检测进行实验方法研究。项目的主要研究内容包括（1）研究了对运动物体表面进行清晰成像的方法，对缺陷三维形貌进行光学编码，形成具有三维尺度信息的光栅图, 并解决了变速运动物体的图像畸变问题；（2）采用FFT频域解调技术和相位解包裹方法获取运动物体表面云纹图的连续位相分布图；（3）根据有关产品表面质量标准，对物体的表面缺陷进行自动识别，获取表面缺陷的细观分布图，定义有效实用的缺陷特征参数，计算提供相关缺陷特征参数的宏观分布图；（4）在运动物体三维形貌测量中引入了双频技术、去零频技术，提高了傅立叶变换法精度；（5）应用相移相位法测量了运动物体三维形貌，研究了基于相移技术的饱和误差抑制算法。本项目的主要特色是可对运动物体的形变及缺陷进行光学编码，获取其形变和缺陷的三维信息，测量过程具有全场无损和高精度的特点。本项目的提出是基于众多表面检测工程中所存在的实际问题而提炼出的具有相同共性的应用基础课题，其研究成果将可应用于高等级公路、汽车钢板及高等级纸张等的表面质量检测，具有很好的应用前景。

The 3D deformation and defects measurement method of a moving object is studied by the projection grating phase measurement technique based on TDI-CCD and Linescan imaging system. The main contents are shown as following: (1) The image capturing method is studied. The surface profile of the moving object is modulated by the projecting digital grating upon the dectcted object. The deformed fringe patterns is captured by the imaging system. In order to obtained images without distortion, a speed coder is used to obtain the relative speed between the moving object and the CCD camera when the moving speed is variable. (2) The Fourier transform method is used to ectract the phase information corresponding to the surface height. The phase unwrapping technique is also studied to the obtain the real phase change caused by the surface height. The phase errors were discussed through simulation and experiment. Following the geometric relationship between the projection gratings and the surface height, the object surface profile can be calculated automatically. (3) The proposed method is used to measure the 3D deformation detection of a highway surface. Following the standard of the highway surface, the feasibility of the method is proved by simulation and experimental results. (4) The dual-frequency grating projection technique and the phase-shifting Fourier transform technique are introduced into dynamic surface profile inspection of a moving object. The experimental results demonstrate that these methods can improve the measurement precision of the moving surface profile detection, and the measurable slope of height variation can be extended. (5) A novel phase-shifting technique is introduced into the 3D profile measurement of a moving object, and the partial intensity saturation issue is studied by a phase-recovering algorithm. In a word, the proposed method researched in this project can be used in the online quality inspection of industry productions and the highway surface defects measurement because of the advantages of noncontact, full field measurement, high speed measurement and high resolution.

本项目应用TDI-CCD和Linescan数字云纹技术对运动物体的三维形变及缺陷检测进行实验方法研究。项目的主要研究内容包括（1）研究了对运动物体表面进行清晰成像的方法，对缺陷三维形貌进行光学编码，形成具有三维尺度信息的光栅图, 并解决了变速运动物体的图像畸变问题；（2）采用FFT频域解调技术和相位解包裹方法获取运动物体表面云纹图的连续位相分布图；（3）根据有关产品表面质量标准，对物体的表面缺陷进行自动识别，获取表面缺陷的细观分布图，定义有效实用的缺陷特征参数，计算提供相关缺陷特征参数的宏观分布图；（4）在运动物体三维形貌测量中引入了双频技术、去零频技术，提高了傅立叶变换法精度；（5）应用相移相位法测量了运动物体三维形貌，研究了基于相移技术的饱和误差抑制算法。本项目的主要特色是可对运动物体的形变及缺陷进行光学编码，获取其形变和缺陷的三维信息，测量过程具有全场无损和高精度的特点。本项目的提出是基于众多表面检测工程中所存在的实际问题而提炼出的具有相同共性的应用基础课题，其研究成果将可应用于高等级公路、汽车钢板及高等级纸张等的表面质量检测，具有很好的应用前景。