相关实验视频
Updated: May 12, 2025

07:24
Home-Based Monitor for Gait and Activity Analysis
Published on: August 8, 2019
6.7K
在典型的日常活动中,大约体质中心的垂直移位:一种基于过渡的补充过方法,使用气位和惯性数据
Alessandra Audisio1, Daniele Fortunato1, Paolo Tasca1
1Politecnico di Torino, Department of Electronics and Telecommunications, Corso Duca degli Abruzzi, 24 10129 Torino, Italy.
Journal of biomechanics
|May 9, 2025
概括
这项研究提出了一种新方法,用于使用可穿戴传感器准确测量质量中心 (CoM) 的垂直位移. 这一突破使得在日常活动中更好地评估功能能力和稳定性.
科学领域:
- 生物力学 生物力学
- 可穿戴技术是可穿戴的技术.
- 康复工程 康复工程 康复工程
背景情况:
- 在日常活动中监测身体的质量中心 (CoM) 运动,可以了解功能能力,包括下肢力量和姿势控制.
- 可穿戴惯性测量单元 (IMU) 为分析现实环境中的CoM运动提供了一种实用方法.
- 在IMU中的加速度计偏移限制了长期监测;整合气压计可以提供稳定的高度测量来减轻这一问题.
研究的目的:
- 开发和验证一种新的方法,即基于过渡的补充波器 (TBCF),用于重建日常活动中质量中心的垂直位移.
- 评估TBCF方法的准确性和稳定性,使用可穿戴传感器和黄金标准运动捕捉系统的组合.
主要方法:
- TBCF方法涉及两个步骤:确定CoM垂直位移的过渡间隔,并在这些间隔内应用补充波器.
- 验证使用了20名健康受试者,他们戴着背部下部安装的IMU和气压计,以立体摄影仪系统作为参考.
- 参与者执行了各种日常生活任务,包括坐在,站,躺,坐和爬楼梯之间的过渡.
主要成果:
- TBCF方法在重建垂直CoM位移方面表现出很高的准确性.
- 与参考系统相比,中位方根平均平方误差为0.02m,中位方一致性相关系数为98%.
- 开发的方法在一系列常见的日常活动中被证明是可靠的.
结论:
- 基于过渡的补充波器为使用可穿戴传感器测量质量位移垂直中心提供了高度准确和强大的解决方案.
- 这种方法通过整合气压计数据来克服加速度计漂移的局限性.
- 这些发现支持了这种方法在改善康复策略和患者结果监测方面的临床实用性.
相关概念视频
Measuring Acceleration Due to Gravity
487
Consider a coffee mug hanging on a hook in a pantry. If the mug gets knocked, it oscillates back and forth like a pendulum until the oscillations die out.
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
A simple pendulum can be described as a point mass and a string. Meanwhile, a physical pendulum is any object whose oscillations are similar to a simple pendulum, but cannot be modeled as a point mass on a string because its mass is distributed over a larger area. The behavior of a physical pendulum can be modeled using the principles of...
487
Velocity and Position by Graphical Method
7.1K
Velocity and position can be calculated from the known function of acceleration as a function of time. The total area under the acceleration-time graph and the velocity-time graph gives the change in velocity and position, respectively. In the case of an airplane, its acceleration is tracked using the inertial navigation system. The pilot provides the input of the airplane's initial position and velocity before takeoff. The inertial navigation system then uses the acceleration data to...
7.1K
Position and Displacement
17.1K
The position of an object defines its location relative to a convenient frame of reference at any particular time. A frame of reference is an arbitrary set of axes from which the position and motion of an object are described. Earth is often used as a frame of reference, and we often describe the position of an object as it relates to stationary objects on Earth. For example, a rocket launch could be described in terms of the position of the rocket with respect to Earth as a whole. On the other...
17.1K
Center of Mass: Introduction
13.2K
Any object that obeys Newton's second law of motion is made up of a large number of infinitesimally small particles. Objects in motion can be as simple as atoms or as complex as gymnasts performing in the Olympics. The motion of such objects is described about a point called the center of mass of the object. The center of mass of an object is a point that acts as if the whole mass is concentrated at that point. The center of mass of an object with a large number of infinitesimally small...
13.2K
Variation in Acceleration due to Gravity near the Earth's Surface
2.3K
An object's apparent weight is its weight measured by a spring balance at its location. It is different from its true weight, the force with which the Earth pulls it, because of the Earth's rotation. Mathematically, an object's apparent weight equals its true weight minus the centripetal force that keeps it in a circular motion along with the Earth's surface every 24 hours.
The difference between the true and apparent weights is proportional to the square of the Earth's...
The difference between the true and apparent weights is proportional to the square of the Earth's...
2.3K
Center of Mass
1.1K
The center of mass is the point at which the total mass of an object can be said to be concentrated. It is a fundamental principle in mechanics and physics that applies to all objects regardless of their shape or size. The center of gravity is the point at which an object’s weight appears to be concentrated and can be used to balance the object perfectly.
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown...
The knowledge of the center of mass can also help us to describe and predict the motion of objects. For example, when a ball is thrown...
1.1K

