Turbine blade surface recovery based on photometric stereo

Long Ma; Yuzhe Liu; Xin Pei; Lei Shi

doi:10.1117/12.2574924

10 October 2020 Turbine blade surface recovery based on photometric stereo

Long Ma, Yuzhe Liu, Xin Pei, Lei Shi

Proceedings Volume 11552, Optical Metrology and Inspection for Industrial Applications VII; 115520W (2020) https://doi.org/10.1117/12.2574924
Event: SPIE/COS Photonics Asia, 2020, Online Only

Abstract

In this paper, we proposed an aero-engine turbine blade measurement technique based on photometric stereo, which can reconstruct the blade surface quite accurately and efficient from the images captured under multi-illuminations. In this work, a measurement system is designed by using 8 LEDs as the point light sources, a light propagation process under the point light illumination is developed. Based on this process, a normal estimation method is provided for the reconstruction process. The system calibration is implemented on a USAF resolution target manufactured by Edmund, which proves the method is capable of performing the surface recovery with the repeatability error down to 0.0272mm. The experiments are performed through a turbine blade from aero-engine, where the comparison result is also provided by using a commercial portable laser scanner from Creaform, which shows the better performance of the methodology presented in this paper.

Conference Presentation

Citation Download Citation

Long Ma, Yuzhe Liu, Xin Pei, and Lei Shi "Turbine blade surface recovery based on photometric stereo", Proc. SPIE 11552, Optical Metrology and Inspection for Industrial Applications VII, 115520W (10 October 2020); https://doi.org/10.1117/12.2574924

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