Multi-line laser projection 3D measurement simulation system technology

Abstract

Based on the research of stripe projection measurement technology, this paper presents a 3D simulation system of divergent multi-line laser projection. Firstly, calculate the coordinates of the reference plane points, backlight tracing method combined with variable step length iteration method was used to calculate the intersection point of line and surface. Then the intersection coordinates are converted from the world coordinate system to the laser coordinate system. Finally, light intensity calculation and light intensity modulation calculation are carried out to obtain the simulation image of divergent multi-line laser stripe projection. The characteristic of this system is that the simulated laser is a divergent multi-line laser and the stripe generation system is highly integrated. The number of light stripe of multi-line laser can be adjusted arbitrarily, and the light intensity distribution of each light stripe is calculated according to the Gaussian distribution model. In the simulation system, there is no need to ensure the intersection point between the optical axis of the camera and the optical axis of the laser. The system simulation method can provide convenience for the further error analysis of the later measurement system and the optimization of the system structure. Experiments show that the system can simulate the 3d measurement system of divergent multi-line laser projection under computer environment. Multi-line laser projection simulation can be carried out for various shapes of objects under different parameters. The accuracy analysis show that the simulation image has high accuracy. The distribution of light intensity accords with the actual situation.