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Intra-articular pressure and skeleton non-contact strain measurement system based on 3D printing

A 3D printing and strain measurement technology, applied in the field of biomechanics to achieve high precision and efficiency, high precision, convenience and repeatability

Inactive Publication Date: 2020-12-22
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention provides an experimental test system for measuring joint force and the overall mechanical properties of human bones under static load, aiming to solve the existing experimental limitations discussed in the background technology and to meet research needs

Method used

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  • Intra-articular pressure and skeleton non-contact strain measurement system based on 3D printing
  • Intra-articular pressure and skeleton non-contact strain measurement system based on 3D printing
  • Intra-articular pressure and skeleton non-contact strain measurement system based on 3D printing

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Experimental program
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Embodiment Construction

[0017] specific implementation plan

[0018] The present invention will be further described below in combination with biomechanical performance test experiments of human knee joints under static loads and accompanying drawings.

[0019] Such as figure 1 As shown, the 3D printing-based intra-articular pressure and bone non-contact strain measurement system includes: force loading device (corresponding to 1 in the figure); the fixture of the tested part (corresponding to 2 in the figure); 3D printing model of the bone to be tested (corresponding to 3, 4 in the figure); non-contact strain testing system (corresponding to 5, 6, 7, 8 in the figure); intra-articular pressure acquisition system (corresponding to 9, 10 in the figure).

[0020] The specific operation of this experimental system is divided into three parts: model making, experimental operation, and data analysis.

[0021] 1. Model making

[0022] A volunteer who meets the needs of the experiment is selected, and CT ...

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Abstract

The invention belongs to the field of biomechanics, and particularly relates to an intra-articular pressure and skeleton non-contact strain measurement experimental test system based on 3D printing. The system comprises a force loading device, a tested piece fixing device, a to-be-tested bone 3D printing model, a non-contact strain test system and an intra-articular pressure acquisition system. The objective of the invention is to solve the problem of mechanical property experimental testing of a tested part in an unconventional to-be-tested environment. According to the experimental testing system, a human bone three-dimensional digital model is established on the basis of scanning data of human bone (including joints) CT and MRI, and the human bone three-dimensional digital model is prepared and formed through the 3D printing technology. The non-contact strain test system is adopted to carry out a human bone full-field mechanical property test under a static load; intra-articular pressure measurement is realized by adopting a film pressure sensor. Intra-articular pressure acquisition and non-contact bone strain acquisition are carried out synchronously to obtain a dynamic corresponding relationship between intra-articular pressure and bone strain. Meanwhile, the experimental system can be applied to more fields but not limited to the field of biomechanics.

Description

technical field [0001] The invention belongs to the field of biomechanics, and specifically relates to an experimental test system for measuring the mechanical properties of a test part in an unconventional test environment by using 3D printing, a thin film pressure sensor and a non-contact optical strain measurement technology under a static load. Background technique [0002] The human body will generate complex forces on each bone in daily life and work, that is, the bones need to bear a variety of complex loads. When the force and moment are applied to the bone in different ways, the bone will bear various loads such as tension, compression, bending, shearing, torsion, etc., and the normal physiological load on the bone is often a combination of these forces. Therefore, in today's general emphasis on health, the problem of bone injury has also received widespread attention. The analysis of the biomechanical properties of bone under normal physiological load can provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/08G01N1/28G01L5/00G01B21/32
CPCG01B21/32G01L5/00G01N1/28G01N3/08
Inventor 邵冰莓刘展滕海东
Owner SICHUAN UNIV