Dynamic loading platform for in-vitro knee joint, and application method thereof

A knee joint and platform technology, applied in the field of dynamic loading platform of the isolated knee joint, can solve the problems of inability to observe the strain distribution of the ligament core soft tissue, inability to complete the knee joint stability test, and single function, so as to reduce the cost of experiment time and learning costs, the convenience of each function test, and the effect of improving experimental efficiency

Pending Publication Date: 2021-01-15
SHANGHAI TAOIMAGE MEDICAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] 2) The force measurement feedback loop is complex or lacks function
[0009] 3) Fast and flexible 6 degrees of freedom control cannot be realized for sample driving
[0010] 4) The funct

Method used

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  • Dynamic loading platform for in-vitro knee joint, and application method thereof
  • Dynamic loading platform for in-vitro knee joint, and application method thereof
  • Dynamic loading platform for in-vitro knee joint, and application method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0064] Reference attached Figure 1-2 As shown, this embodiment provides a dynamic loading platform for an isolated knee joint, which mainly includes a test bench 500 , a robotic arm system 200 , a non-contact full-field strain measurement system 300 , a motion capture system 400 and an industrial computer 100 .

[0065] In this embodiment, the experimental platform 500, the mechanical arm system 200, the non-contact full-field strain measurement system 300, the motion capture system 400, and the industrial computer 100 are used to construct an easy-to-use dynamic dynamic model of the isolated knee joint from the hardware structure and software program. The loading platform is used for biomechanical testing of the knee joint, so as to meet the requirements of mechanical testing and kinematic testing of the isolated knee joint, thereby reducing the cost of experimental time and learning costs, improving experimental efficiency, and satisfying the performance of knee joint surgeo...

Embodiment 2

[0090] refer to Figure 8 As shown, this embodiment provides a method for testing the stability of an isolated knee joint, using the dynamic loading platform of the isolated knee joint in Embodiment 1. The method comprises the steps of:

[0091]S11 , fixing the knee joint sample on the test bench 500 .

[0092] S12, use the motion capture system 400 to set marker points, establish a three-dimensional spatial coordinate system of the knee joint sample, acquire spatial position data of each marker point, and acquire the relative spatial position relationship between the end of the mechanical arm and the knee joint sample.

[0093] S13, based on the spatial position data of each marked point, send a control instruction to the robotic arm system 200, and drive the knee joint sample to a neutral position according to the feedback value of the force gauge.

[0094] S14, preset the initial spatial position of the knee joint sample.

[0095] S15, send the control command of the fun...

Embodiment 3

[0099] refer to Figure 9 As shown, this embodiment provides a structural strain analysis method of an isolated knee joint, using the dynamic loading platform of the isolated knee joint as in Embodiment 1, and the method includes the following steps.

[0100] S21 , fixing the knee joint sample on the test bench 500 .

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Abstract

The invention discloses a dynamic loading platform for an in-vitro knee joint, and an application method thereof. The dynamic loading platform comprises an experiment table, a mechanical arm system, amotion capture system, a non-contact full-field strain measurement system and an industrial personal computer; the motion capture system establishes a three-dimensional space coordinate system of a knee joint sample by setting mark points, and acquires space position data of the mark points in real time when the knee joint sample performs continuous functional motion; the non-contact full-field strain measurement system obtains displacement data and strain distribution of speckles on the surface of a knee joint sample by using a digital image correlation technology based on a binocular visionprinciple; MATLAB software is arranged in the industrial personal computer, and the tail end of a mechanical arm is controlled to drive the knee joint sample to perform functional action; spatial position data of the mark points are received, and a stability evaluation report of the knee joint sample is obtained; and speckle displacement data are received, and a strain analysis report is obtainedthrough a digital image related technology. According to the invention, mechanical test and motion function test requirements are met, the experiment time cost and learning cost are reduced, and theexperiment efficiency is improved.

Description

technical field [0001] The invention relates to the field of biomechanical experiments of isolated knee joints, in particular to a dynamic loading platform of isolated knee joints and an application method thereof. Background technique [0002] The knee joint is a synovial joint composed of femur, tibia, fibula, patella, and numerous muscles, ligaments, cartilage and other soft tissues ( synovial joint ), is the largest and most complex joint in the human body, and it is also the joint most vulnerable to injury. Ligaments, especially the anterior cruciate ligament (ALL), are important structures to maintain the stability of the knee joint. Studies have shown that 80% of knee ligament injuries involve ACL injuries, and the incidence of the latter is as high as 2 million cases worldwide every year. Therefore, it is a very important topic for the stability assessment and motor function test of the knee joint. However, the postoperative satisfaction rate of patients with exist...

Claims

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Application Information

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IPC IPC(8): G01M13/00
CPCG01M13/00
Inventor 杨洋洋程荣山蔡宗远
Owner SHANGHAI TAOIMAGE MEDICAL TECH CO LTD
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