Alarm thresholds of threaten regions based on triangle mesh voxelization

摘要

This paper designs a visual scene navigation and alarm system of the aircraft that aims at improving the ability of executing tasks in low visibility and complex environment. Firstly, a bounding box was created for three dimensional threaten regions, and the surface voxelization is realized by the point voxelization. The solid voxelization is realized by using flooding operation. A large number of intersected detection can be avoided in this algorithm by using the space positioning function of the voxelization. Secondly, with the System Operating Characteristic (SOC) method and Monte Carlo simulation, different alarm thresholds in different vertical descent speeds and different foresight distances are obtained. Finally, the visual scene navigation and alarm system is designed and implemented on the basis of the voxelization and the alarm threshold. The system can provide different angles of environment view for pilots in low visibility and complex environment. The system can also provide credible alarm according to the parameters of the aircraft compared with the alarm threshold. The results show that the system is of great practical value.