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相关概念视频

Bending01:10

Bending

273
Pure bending is a fundamental concept in structural mechanics, essential for understanding how materials deform under symmetrical loads without direct forces. Pure bending occurs when prismatic members, such as beams, are subjected to equal and opposite moments that induce bending. The phenomenon is crucial as it allows for predicting stress distributions without the influence of axial or shear forces.
In pure bending, the bending stress in a beam is calculated based on the bending moment and...
273
Unsymmetric Bending - Angle of Neutral Axis01:15

Unsymmetric Bending - Angle of Neutral Axis

308
Unsymmetrical bending occurs when a structural member is subjected to bending moments in a plane that does not align with the member's principal axes. This scenario typically arises in beams and other structural components when loads are applied at non-ideal angles, introducing complexities in stress analysis.
When a bending moment is applied at an angle θ concerning the vertical axis of a symmetrical member, it can be resolved into components along the member's principal...
308
Unsymmetric Bending01:18

Unsymmetric Bending

331
Unsymmetrical bending occurs when the bending moment applied to a structural member does not align with its principal axis. This misalignment leads to complex stress distributions and deflection patterns that differ from those in symmetrical bending, and are essential for designing structures to withstand different loading conditions. In unsymmetrical bending, the neutral axis—where stress is zero—does not necessarily align with the geometric axes of the cross-section. The...
331

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相关实验视频

Updated: Jul 4, 2025

In Vitro Application of a Wireless Sensor in Flexion-Extension Gap Balance of Unicompartmental Knee Arthroplasty
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基于双层电容的曲角度传感器适用于人类关节

Daisuke Goto1, Yusuke Sakaue2, Tatsuya Kobayashi1

  • 1Graduate School of Sports and Health ScienceRitsumeikan University Kyoto 603-8577 Japan.

IEEE open journal of engineering in medicine and biology
|January 26, 2024
PubMed
概括
此摘要是机器生成的。

这项研究引入了一种新的双层电容曲角度传感器,用于在循环时监测关节角度. 该传感器在现实世界炼场景中对评估膝关节角度具有很高的准确性和实用性.

关键词:
骑自行车运动 自行车运动这是歇斯底里症.膝关节关节的关节是什么?康复康复康复康复康复康复可穿戴式传感器传感器

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科学领域:

  • 生物医学工程 生物医学工程
  • 可穿戴技术可穿戴技术
  • 运动科学 运动科学 运动科学

背景情况:

  • 精确监测关节角度对于分析自行车运动期间的生物力学至关重要.
  • 现有的关节角度测量方法可能很麻烦,或者缺乏实时反.
  • 开发可靠和可穿戴的传感器对于客观的性能评估至关重要.

研究的目的:

  • 开发和验证一种使用双层电容的新型曲角度传感器.
  • 为了评估传感器在自行车练习期间测量关节角度的性能.
  • 为量化评估膝关节角度提供一个实用的工具.

主要方法:

  • 开发了一种基于双层电容原理的曲角度传感器.
  • 传感器经历了严格的测试,包括拉伸,曲和自行车测试.
  • 性能与光学运动捕捉对准确性评估进行了验证.

主要成果:

  • 传感器在拉伸时表现出最小的电容差异变化.
  • 在曲测试中,传感器实现了8.0%的hysteresis和3.1°根平均平方误差 (RMSE).
  • 对人类进行的自行车测试显示,在穿着长腿时,RMSE范围从4.7°到7.0°不等.

结论:

  • 开发的双层电容曲角度传感器是监测关节角度的实用工具.
  • 该传感器提供了骑自行车时膝关节角度的定量和观察性评估功能.
  • 这项技术在体育科学,康复和绩效分析方面具有潜在的应用.