Modeling method based on combined spring virtual model composed of disc springs

Abstract

The invention discloses a modeling method based on a combined spring virtual model composed of disc springs. The method comprises the steps of S1, initializing a virtual scene; S2, establishing a combined spring which is formed by gradually increasing the number of the disc springs; and S3, calculating partial area deformation of a virtual flexible body. According to the modeling method provided by the invention, the [i+1]th layer of any combined spring is formed by folding two groups of [i+1] layers of superimposed disc springs; through application of relations of pressures consumed in each layer and among the layers of the combined spring, the condition of the pressure consumed by the single disc spring in each layer is solved, the deformation of the single disc spring in each layer is solved according to a computing relation between the stress and the deformation of the single disc spring; the total deformation of the model is obtained; under the effect of the same given virtual contact pressure, the computing volume of the combined spring is reduced; the method can be used for virtual operation simulation for body soft tissue deformation and is consistent with layer structures and stress condition of body soft tissues.

Description

technical field [0001] The invention relates to a force-tactile modeling method, in particular to a modeling method based on a combined spring virtual model composed of disc spring pieces. Background technique [0002] In recent years, with the continuous development of computer technology and medical imaging technologies such as CT and MRI, virtual reality technology has been more and more applied to the modern medical field. Virtual surgery simulation is one of the important applications. It realistically simulates various deformations of human tissue under pressure through precise modeling, and provides users with visual display, force feedback system and various other possible sensory forms. Provides the feel of a real surgery scene. It can not only be used as a simulator for surgical training, but also provide different experimental objects that can be used repeatedly according to the needs of doctors, which greatly reduces the cost of surgical training for surgeons, a...

AI Technical Summary

Problems solved by technology

[0003] The deformation of human soft tissue is the key technology of virtual surgery simulation. Soft tissue occupies a large proportion of the entire human body structure. Many important organs belong to soft tissue, and the physical characteristics of living soft tissue are relatively complex. It is very difficult to establish a physical model to describe various physical properties. not easy

At present, there are mainly force-tactile modeling methods such as mass-spring, finite element, and boundary element, but they all have some shortcomings and limitations accordingly.

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