The calculating method of minimal-distance between aero-engine pipelines by using optoelectronic measurement system

Ziyue Zhao

doi:10.1117/12.2543161

12 March 2020 The calculating method of minimal-distance between aero-engine pipelines by using optoelectronic measurement system

Ziyue Zhao

Author Affiliations +

Proceedings Volume 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems; 114390N (2020) https://doi.org/10.1117/12.2543161
Event: 2019 International Conference on Optical Instruments and Technology, 2019, Beijing, China

Abstract

The minimal-distance between aero-engine pipelines is a very important parameter that can ensure the normal operation of the aero-engine. The traditional measurement method by using the feeler gauge is inefficient. This paper introduces the calculating method by using optoelectronic measurement system. In this way we can get the point cloud data of all the pipelines. Firstly, the points belonged to the same pipeline is picked up and saved in a group. Secondly, a set of equal-interval grid is built along a coordinate direction in which the pipeline stretched longest. Thirdly, on each trend-line point, a projection plane is built vertically to a straight line connecting the point and its adjacent point. Fourthly, the projected points on each projection plane are fitted into a circle using least square fitting method. Finally, traversing method is used to calculate minimal-distance between two groups of center-line points. And minimal-distance of two pipeline surfaces is calculated by subtracting radii of two pipelines from the minimal-distance of center-line points. Four groups of pipelines are examined to verify the proposed strategy. The results show that the deviations of minimal-distance of two pipeline surfaces are within -0.35mm~0.46mm. And the deviations of pipeline radius are within-0.1mm~0.29mm. The proposed method is more robust than mostly used method for calculating center-line data of pipeline.

Citation Download Citation

Ziyue Zhao "The calculating method of minimal-distance between aero-engine pipelines by using optoelectronic measurement system", Proc. SPIE 11439, 2019 International Conference on Optical Instruments and Technology: Optoelectronic Measurement Technology and Systems, 114390N (12 March 2020); https://doi.org/10.1117/12.2543161

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KEYWORDS

Clouds

Data centers

Optoelectronics

3D metrology

Distance measurement

Image segmentation

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