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针对传统蒙皮对缝检测方法误差大、效率低等问题以及二维激光对缝检测的缺陷,采用了一种基于三维激光扫描蒙皮对缝的检测方法并开发出相应软件。提出了蒙皮对缝三维点云数据的去噪、临界点识别及提取方法,根据蒙皮对缝间隙阶差对气动外形的影响,分析其实际几何结构,与理论结构对比,提炼出了计算蒙皮对缝间隙阶差的数学模型,并通过对试验模拟件对缝的检测,验证了其计算精度。结果表明:该检测方法可行,与二维激光检测相比精度和重复精度更高,间隙测量精度达到0.04mm,阶差测量精度达到0.02mm,可以满足蒙皮对缝检测需求,为分析间隙阶差对装配质量的影响提供数值依据。
Aiming at the problems such as large error and low efficiency of traditional seam detection methods and the defect of two-dimensional laser seam detection, a detection method based on three-dimensional laser skinning is proposed and corresponding software is developed. Based on the influence of skin gap on the aerodynamic profile, the actual geometrical structure of the skin is analyzed and compared with the theoretical structure, the calculation of the calculation of the three-dimensional point cloud data denoising, The mathematical model of the gap between the skin and the gap, and through the test simulation of the seam on the test to verify its accuracy. The results show that the method is feasible, the accuracy and repeatability are higher than that of two-dimensional laser detection, the accuracy of gap measurement is 0.04mm, the accuracy of step measurement is 0.02mm, which can meet the requirement of seam detection of skin. Poor on the assembly quality to provide a numerical basis.