Profile Analysis Method Based on Point Cloud Scanning of Blade Profile

doi:10.3901/JME.2022.17.041

Abstract

Abstract: Aiming at the problems of slow processing speed and poor shape characteristics of optical measurement of massive point cloud on aero-engine blade, a precise analysis algorithm of blade measurement point cloud profile based on profile reconstruction was proposed. This algorithm is able to make full use of the advantage that optical measurement can cover the whole leaf, including point cloud preprocessing, contour extraction and contour analysis. Firstly, Blade height cutting of the point cloud is according to the specifications for blade design. Then, the measured point cloud is processed by using statistical methods to filter rapidly, and the octree data structure is used for voxel sampling of the point cloud. For the point cloud pretreated above, profile reconstruction is carried out by using the regional growth method to acquire profile data. Finally, the method of profile analysis is introduced to calculate the characteristic parameters of blade profile and optimize the solution of profile error.

Key words: aviation blades, point cloud, profile extraction, blade section analysis

CLC Number:

TH721

DING Jianjun, LU Guangchao, SUN Lin, JIANG Zhuangde. Profile Analysis Method Based on Point Cloud Scanning of Blade Profile[J]. Journal of Mechanical Engineering, 2022, 58(17): 41-48.

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