A modeling method of bleeding simulation model in virtual surgery

A technology of simulation model and modeling method, applied in the field of virtual surgery, to achieve the effects of improving real-time performance and authenticity, good smoothness, and smooth simulation effect

Active Publication Date: 2020-10-09
北京交通大学长三角研究院
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Problems solved by technology

[0005] The second purpose of the present invention is to revise the particle property parameters through the research on the physical properties of bleeding, so that the smoothness of the bleeding simulation surface is better, solve the problem of boundary distortion, and improve the authenticity of bleeding simulation

Method used

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  • A modeling method of bleeding simulation model in virtual surgery
  • A modeling method of bleeding simulation model in virtual surgery
  • A modeling method of bleeding simulation model in virtual surgery

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Embodiment Construction

[0042] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0043] The present invention provides a modeling method of a bleeding simulation model in virtual surgery, which can improve the real-time performance and authenticity of bleeding simulation in virtual surgery, including:

[0044] First, use the method of dividing the grid to search for the neighboring points of particle i.

[0045] Such as figure 1 As shown, the present invention divides the particle system into grids with the radius of action of the SPH method as the side length, improves the efficiency of searching for adjacent points in the SPH method by dividing the grids, and improves the calculation efficiency of bleeding simulation. In programming, the method of determining the grid division area according to the position of the particle i that needs to be calculated...

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Abstract

The invention discloses a modeling method for a bleeding simulation model in a virtual operation. The modeling method comprises the steps that 1, a particle system is determined, and the particle system is divided into a grid with the action radius of an SPH method as the side length; 2, particles i are determined, whether the particles i are in the grid or not is judged, and when the particles iare in the grid, adjacent particles of the particle i are determined; 3, the viscosity coefficient and action radius of the particles i are revised to obtain a revised viscosity coefficient and a revised action radius, and the model is built according to the stress, accelerated speed, revised viscosity coefficient and revised action radius of the particles i. According to the modeling method for the bleeding simulation model in the virtual operation, the efficiency of searching adjacent points through the SPH method is improved by using a grid division method; the physical property of the bleeding model is improved, so that the smoothness of the bleeding simulation surface is better, the problem of boundary distortion is solved, the real-time performance and authenticity of the bleeding simulation are improved, and the simulation effect is smoother.

Description

technical field [0001] The invention belongs to the technical field of virtual surgery in virtual reality, in particular to a modeling method of a bleeding simulation model in virtual surgery. Background technique [0002] Virtual reality technology is a virtual world created by computer simulation, which can provide users with a real feeling. Virtual reality technology includes disciplines such as computer graphics, artificial intelligence and mechanics, and realizes the simulation of the environment and perception by simulating vision, hearing and touch. The user uses behavioral actions such as shaking his head and raising his hand as input, and the computer processes and responds, and feeds back to the user's senses. As an important research direction of virtual reality technology, virtual surgery provides an immersive training platform for surgeons, which can train surgeons more safely and efficiently with reduced costs, and avoids using animals as research objects. It ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B34/10
CPCA61B34/10A61B2034/101
Inventor 石文刘小平
Owner 北京交通大学长三角研究院
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