Current Optics and Photonics

Optical Society of Korea (한국광학회)
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Point Cloud Measurement Using Improved Variance Focus Measure Operator

  • Yeni Li (Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University) ;
  • Liang Hou (Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University) ;
  • Yun Chen (Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University) ;
  • Shaoqi Huang (Aero Engine Corporation of China (AECC) Guizhou Liyang Aviation Power Co., Ltd.)
  • Received : 2023.11.24
  • Accepted : 2024.02.27
  • Published : 2024.04.25
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Abstract

The dimensional accuracy and consistency of a dual oil circuit centrifugal fuel nozzle are important for fuel distribution and combustion efficiency in an engine combustion chamber. A point cloud measurement method was proposed to solve the geometric accuracy detection problem for the fuel nozzle. An improved variance focus measure operator was used to extract the depth point cloud. Compared with other traditional sharpness evaluation functions, the improved operator can generate the best evaluation curve, and has the least noise and the shortest calculation time. The experimental results of point cloud slicing measurement show that the best window size is 24 × 24 pixels. In the height measurement experiment of the standard sample block, the relative error is 2.32%, and in the fuel nozzle cone angle measurement experiment, the relative error is 2.46%, which can meet the high precision requirements of a dual oil circuit centrifugal fuel nozzle.

Keywords

Acknowledgement

National Natural Science Foundation of China (Grant no. 51975495); the Fujian Province Science and Technology Innovation Platform Project (Grant no. 2022-P-022); the Guiding Funds of the Central Government to Support the Development of Local Science and Technology (Grant no. 2022L3049).

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