Research On Bimanual Interactive Perception Technology Of Dynamic Stress Field

Blood flow simulation of human vascular network is important for studying the human blood supply circulation system.The most intuitive and efficient solution for blood flow simulation is to build a physical model based on the theory of hemodynamics to calculate the blood flow distribution and then to display the data with the help of computer visualization technology.The balance between model quality,efficient simulation and presentation is hardly achieved in the existing work,and the lack of interaction means makes it difficult for users to have a good experience.Therefore,designing modeling algorithms to improve mesh quality,streamlining physical models to reduce simulation costs,and enhancing interactive presentation capabilities with the help of extended reality technologies are valuable and meaningful for both clinical research and scientific presentations of the vascular system.In order to improve the model quality of the vascular system while reducing the rendering cost of similar large tubular surface models,a fast modeling and fusion algorithm for tubular surfaces is proposed.Firstly,the technique of building 3D surface models based on skeleton information is thoroughly studied,focusing on the rationality and feasibility of characterizing the vascular network by columnar surfaces,and designing some preprocessing schemes for skeleton input.Secondly,the generation scheme of continuous columnar surfaces with small torsion is proposed based on the minimum rotation scalar system,which greatly improves the modeling efficiency.Finally,for the fusion of tubular surfaces in the joint region,the A curve boundary structure based on spherical Voronoi diagram algorithm is proposed to help match the surface curve demarcation during column fusion,and after comparing with various typical algorithms,the results prove the stability and high efficiency of the structure.For the simulation calculation of blood flow,a mathematical model of blood flow distribution is designed based on the Poiseuille equation and the law of flow conservation.And a desktop system for blood flow simulation based on this model is developed.Firstly,an indepth understanding of the related work in the field was conducted to summarize the physical model that can be used to calculate the blood flow distribution,and the boundary conditions of the model input were specified based on the existing research to ensure a closer approximation to the real simulation data.Secondly,a 3D display system was designed and developed after verifying the usability of the physical model.Finally,the results of blood flow and pressure distribution in several simulation scenarios were demonstrated using the 3D system,and the potential application and promotion value of the display system were verified.Based on the modeling technology and simulation research,the immersive roaming system of vascular network based on virtual reality technology and the interactive display system of vascular data visualization based on mixed reality technology were designed and developed.Firstly,the development process of extended reality technology was studied to understand the detailed conceptual classification and the different characteristics between different subtechnologies.And the technical solution matching of system functions was completed for their characteristics.Secondly,the development strategies of virtual reality and mixed reality systems were introduced separately according to the design process,and then the results were presented.Finally,experiments were designed to test the objective performance of the two display systems compared with desktop applications.Immediately afterwards,a user study containing 14 samples was done to discuss and study the transformation of the experience brought by the two systems from the subjective point of view.The results affirm the positive significance of the two display systems for the fields of education and science and doctorpatient communication,as well as the important research value of extended reality technology for 3D interactive display.