Prof. Dabao Lao Profile

Prof. Dabao Lao

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Proceedings Article | 4 December 2024 Paper

Research on laser 3D projection technology based on non-cooperative targets

Dabao Lao, Yukun Liu, Fang Wang, Yongbin Quan

Proceedings Volume 13283, 132833Q (2024) https://doi.org/10.1117/12.3037149

KEYWORDS: Galvanometers, Laser applications, 3D projection, Laser systems engineering, Mirrors, Calibration, Projection systems, Control systems, Visualization

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Laser 3D projection technology is a new type of laser application, mainly used for composite material bedding, high-precision parts installation and positioning, pattern spraying and other aspects. As an auxiliary system in intelligent manufacturing, laser 3D projection technology is widely used in aerospace manufacturing, 3D parts assembly and other scenarios. The test software is developed based on the embedded system. According to the imported CAD model and positioning system to obtain position information, so as to plan the area of laser pattern projection. The laser 3D projection system uses a high-speed deflector to project a laser to achieve positioning work or laser projection work, and assist other processing equipment to complete the layup, positioning and spraying work. In this paper, we design a laser 3D projection system based on non-cooperative targets. It analyzes the existing system design and system calibration methods, and expounds the structural design and workflow of the laser 3D projection system. While improving work efficiency and accuracy, it can also reduce the artificial scoring errors and missing items in the traditional methods, realize the digitalization of the manufacturing and production process of important equipment such as aircraft, and ensure the performance of the system.

Proceedings Article | 30 April 2024 Paper

A design of 3D laser projection system based on binocular vision

Dabao Lao, Yukun Liu, Fang Wang, Yongbin Quan

Proceedings Volume 13155, 1315515 (2024) https://doi.org/10.1117/12.3019463

KEYWORDS: Cameras, 3D projection, Imaging systems, Laser applications, Calibration, Laser scanners, Binocular vision, Point clouds

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Laser three-dimensional (3D) projection technology is a new laser application technology. The technology can be a wide range of aerospace manufacturing, 3D assembly of parts and other scenarios. Through the high-speed deflection device, the laser beam can be continuously projected at different positions on the surface of the object. Due to the Visual staying phenomenon, the circular laser beam can present the expected outline and pattern on the surface of the object, so as to realize the projection function. In this paper, we designed a laser 3D projection system based on binocular vision. It analyzes the existing system designs and system calibration methods, expounds the structure design of the laser 3D projection system based on binocular vision, and explains the workflow of the system. The system calibration experiment and the laser 3D projection experiment are also conducted, and the experimental error is analyzed. The results show that the average projection error of the system is 0.37mm at the working distance of the 1.8-2.2m, which meets the usage requirements in most scenarios

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