机器学习方法的比较分析用于用线性加速和角速率信号检测胎儿运动
Lucy Spicher1, Carrie Bell2, Kathleen H Sienko1
1Department of Mechanical Engineering, University of Michigan, Ann Arbor, MI 48109, USA.
Sensors (Basel, Switzerland)
|May 14, 2025
概括
使用可穿戴传感器持续监测胎儿运动,有望改善产前护理. 机器学习模型有效地从线性加速和角速率数据中检测到胎儿运动,增强胎儿健康评估.
科学领域:
- 生物医学工程 生物医学工程
- 孕产妇和胎儿医学 孕产妇和胎儿医学
- 信号处理 信号处理
背景情况:
- 减少胎儿运动 (RFM) 是胎儿风险的关键指标,需要改善产前监测.
- 目前的方法只提供胎儿健康的间歇性快照,需要临床设置和专家解释.
- 需要持续,客观的监测系统来增强产前护理和早期发现胎儿痛苦.
研究的目的:
- 探索可穿戴惯性测量单元 (IMU) 从可穿戴惯性测量单元 (IMU) 获得的线性加速和角速率数据的实用性,用于持续的胎儿运动检测.
- 开发和比较机器学习模型,以区分胎儿运动与母亲活动.
- 在现实世界的产前监测场景中评估不同机器学习方法的性能.
主要方法:
- 23名参与者戴着4个腹部IMU和1个胸部参考传感器.
- 参与者用手持按手动指示他们感知到的胎儿运动.
- 机器学习模型 (Random Forest,BiLSTM,CNN) 使用加速度计和陀螺仪数据进行训练,包括手工设计的功能,时间序列和光谱图.
主要成果:
- 结合加速度计和陀螺仪数据,在所有评估的机器学习模型中显著改善了胎儿运动检测.
- 卷积神经网络 (CNN) 显示出卓越的性能,但需要更大的数据集.
- 随机森林 (RF) 和双向长短期记忆 (BiLSTM) 模型在较小的数据集和增强的解释性下提供了强大的性能,尽管对信号噪声的敏感性增加了.
结论:
- 可穿戴的IMU与机器学习相结合,为持续,客观的胎儿运动监测提供了一种可行的方法.
- 机器学习模型的选择取决于数据集的大小和可解释性要求.
- 这项技术有可能通过提供对胎儿福祉的持续洞察来彻底改变产前护理.
相关概念视频
Relative Motion Analysis using Rotating Axes - Acceleration
314
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame. The absolute velocity of point B is determined by adding the absolute velocity of point A, the relative velocity of point B in the rotating frame, and the effects caused by the angular velocity within the rotating frame.
Time differentiation is...
Time differentiation is...
314
Relative Motion Analysis - Acceleration
317
A slider-crank mechanism converts rotational motion from the crank into linear motion of the slider or vice versa. This mechanism consists of three main parts: the crank, the connecting rod, and the slider. The movement of the slider-crank is an example of general plane motion as the fluctuating angle between the crank and the connecting rod. Consider a segment AB where point A is at the end of the slider and point B is on the diametrically opposite end to point A, on a crack. The variance in...
317
Relative Motion Analysis using Rotating Axes-Problem Solving
378
Consider a crane whose telescopic boom rotates with an angular velocity of 0.04 rad/s and angular acceleration of 0.02 rad/s2. Along with the rotation, the boom also extends linearly with a uniform speed of 5 m/s. The extension of the boom is measured at point D, which is measured with respect to the fixed point C on the other end of the boom. For the given instant, the distance between points C and D is 60 meters.
Here, in order to determine the magnitude of velocity and acceleration for point...
Here, in order to determine the magnitude of velocity and acceleration for point...
378
Relative Motion Analysis using Rotating Axes
437
Consider a component AB undergoing a linear motion. Along with a linear motion, point B also rotates around point A. To comprehend this complex movement, position vectors for both points A and B are established using a stationary reference frame.
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
However, to express the relative position of point B relative to point A, an additional frame of reference, denoted as x'y', is necessary. This additional frame not only translates but also rotates relative to the fixed frame, making it...
437


