Author(s)

Zhang Haotian ¹, Huang Danping ¹, Wang Yijin ¹

Affiliation(s)

¹ College of Mechanical Engineering, Sichuan University of Science & Engineering, Yibin, 644000, China

Corresponding Author

Huang Danping

ABSTRACT

For the precise three-dimensional measurement of the leaf contour of space engine blades, conventional measurement means cannot take into account the accuracy and completeness of the measurement, this paper proposes a multi-view measurement system based on line structured light and a global optimisation method to improve the blade measurement accuracy. Firstly, the multi-view simultaneous acquisition of blade deformation profile images is completed by a multi-camera acquisition system, and the multi-view system is globally coordinate unified by using the complete global calibration of four sets of binocular subsystems. Then, a global optimisation method is proposed to perform ICP point cloud alignment on the point clouds of neighbouring views in the high overlap region, while the global calibration of cylindrical calibrators is completed for non-neighbouring views, and cylindrical fitting is performed through the geometrical features of the calibrators in order to complete the secondary optimisation. The experimental results show that the average standard deviation of the method is 0.1253 mm for the blade, which meets the actual inspection requirements.

KEYWORDS

Blade; 3D measurement; Multi-view; Line structured light; Global calibration

CITE THIS PAPER

Zhang Haotian, Huang Danping, Wang Yijin, Research on Multi-view 3D Measurement Technology of Blade Based on Linear Structured Light. Industrial Engineering and Innovation Management (2024) Vol. 7: 47-60. DOI: http://dx.doi.org/10.23977/ieim.2024.070107.

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