选择最佳的切割频率来过线性加速和角速度信号,这些信号与用仪器口罩测量的头部冲击相关
Ryan Gellner1, Mark Begonia2, Steve Rowson2
1Virginia Tech (Biomedical Engineering and Mechanics), Blacksburg, VA, USA. gryan3@vt.edu.
Annals of biomedical engineering
|February 25, 2024
概括
确定了仪器口罩的最佳过器切断频率,以提高头部冲击测量的准确性. 这些发现提高了运动安全研究的六度自由度头部冲击数据的可靠性.
科学领域:
- 生物力学 生物力学
- 运动科学 运动科学 运动科学
- 仪器仪表工程 仪器仪表工程
背景情况:
- 仪器口罩可以通过六度自由度数据直接测量头部撞击.
- 传统的过实践往往使用的切断频率低于推,可能会影响准确性.
- 缺乏标准化的后处理,阻碍了研究和设备之间的可比性.
研究的目的:
- 用仪器口罩来确定最佳的过器切断频率,用于六度自由度的头部冲击测量.
- 为了最大限度地减少从牙收集的线性加速和角速度数据的测量误差.
- 建立标准化的过协议,以提高数据的可比性.
主要方法:
- 使用实验室级仪器和仪器口罩收集线性加速和角速度数据.
- 对口罩数据应用了24种不同的切断频率 (25600 Hz).
- 将口罩测量转换为头重心 (CG) 线性加速,优化线性和角信号的切断频率.
主要成果:
- 最佳切断频率为线性加速的175 Hz,角速度的250 Hz.
- 刚性冲击有利于更高的最佳切断频率 (175 Hz线性,275 Hz角性) 比接冲击 (100 Hz线性,175 Hz角性).
- 在转换的峰值结果线性加速中最小化了百分比误差的平均值和标准偏差.
结论:
- 确定了最佳的过器切断频率 (175 Hz线性,250 Hz角性) 提高了对头部冲击测量的准确性.
- 冲击持续时间会影响最佳的过器选择,这表明运动特定的标准可能是有益的.
- 在体育安全研究中,标准化的过协议对于可靠和可比的头部撞击数据至关重要.
相关概念视频
Equilibrium and Balance
4.7K
The inner ear assumes dual functionalities of auditory perception and equilibrium maintenance. The vestibule is the organ responsible for balance. This organ contains mechanoreceptors, specifically hair cells, endowed with stereocilia, which aid in deciphering information regarding the position and motion of our heads. Two intrinsic components, the utricle and saccule, help perceive head position, while the semicircular canals track head movement. Neurological messages initiated in the...
4.7K
Angular Velocity and Acceleration
9.3K
We previously discussed angular velocity for uniform circular motion, however not all motion is uniform. Envision an ice skater spinning with their arms outstretched; when they pull their arms inward, their angular velocity increases. Additionally, think about a computer's hard disk slowing to a halt as the angular velocity decreases. The faster the change in angular velocity, the greater the angular acceleration. The instantaneous angular acceleration is defined as the derivative of...
9.3K
Aliasing
136
Accurate signal sampling and reconstruction are crucial in various signal-processing applications. A time-domain signal's spectrum can be revealed using its Fourier transform. When this signal is sampled at a specific frequency, it results in multiple scaled replicas of the original spectrum in the frequency domain. The spacing of these replicas is determined by the sampling frequency.
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
If the sampling frequency is below the Nyquist rate, these replicas overlap, preventing the original...
136
Perceiving Loudness, Pitch, and Location
212
The human brain perceives pitch through two primary mechanisms reflected in place theory and frequency theory. Each mechanism describes how sound waves are interpreted as specific pitches by the brain, offering insights into the intricate processes of auditory perception.
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
Place theory, or place coding, suggests that different pitches are heard because various sound waves activate specific locations along the cochlea's basilar membrane. The brain determines the pitch of a sound by...
212
Rotation with Constant Angular Acceleration - I
6.7K
If angular acceleration is constant, then we can simplify equations of rotational kinematics, similar to the equations of linear kinematics. This simplified set of equations can be used to describe many applications in physics and engineering where the angular acceleration of a system is constant.
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...
Using our intuition, we can begin to see how rotational quantities such as angular displacement, angular velocity, angular acceleration, and time are related to one another. For example, if a flywheel...
6.7K
The Cochlea
44.9K
The cochlea is a coiled structure in the inner ear that contains hair cells—the sensory receptors of the auditory system. Sound waves are transmitted to the cochlea by small bones attached to the eardrum called the ossicles, which vibrate the oval window that leads to the inner ear. This causes fluid in the chambers of the cochlea to move, vibrating the basilar membrane.
44.9K


