基于光场成像的快照式气膜孔三维测量技术

doi:10.7527/S1000-6893.2020.24158

Abstract

Abstract: The cooling efficiency of film cooling holes is significantly affected by their geometric parameters; therefore, it is necessary to detect these parameters by effective measures. Based on the principle of light-field imaging, the application of the single light-field camera snapshot three-dimensional (3D) measurement technology in film cooling hole inspection was explored. Compared with other optical measurement technologies, this light-field based technology can quickly obtain 3D point cloud data of film cooling holes from the captured raw light-field image with only one shot, achieving high data collection efficiency. In the experiment, a set of standard gauge blocks were measured, and the experimental results demonstrate the potential of a single light-field camera for industrial-grade precision measurement. Detection results of the geometric parameters of the film cooling hole on an actual blade initially indicate the application possibility of this technique to the 3D measurement of film cooling holes. The simplicity of the single light-field imaging system makes it easy to operate and convenient to integrate with other sensor devices, therefore providing a new solution to the problem of 3D measurement of film cooling holes.

Key words: light-field cameras, 3D imaging, film cooling hole measurement, 3D point clouds, geometric parameters

CLC Number:

V232.4

ZHAO Yuanyuan, ZENG Fei, LI Yang, GAN Mingyu, SHI Shengxian. 3D measurement technique for film cooling holes based on light-field imaging[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(10): 524158-524158.

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3D measurement technique for film cooling holes based on light-field imaging

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