关于接触压力和活动水平作为影响PPG传感器性能因素的影响的实验分析
Francesco Scardulla1, Gloria Cosoli2, Cosmina Gnoffo1
1Department of Engineering, University of Palermo, Viale delle Scienze, Ed. 8, 90128 Palermo, Italy.
Sensors (Basel, Switzerland)
|July 30, 2025
概括
优化接触压力为光电脉冲图 (PPG) 传感器是准确的心率监测的关键. 60mmHg的压力提供了最佳性能,减少了体育活动期间的错误.
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
- 生理监测 生理监测
背景情况:
- 光电发热 (PPG) 传感器被广泛用于用于心率监测的可穿戴设备.
- 它们的准确性可能会受到接触压力和体力活动等因素的重大影响.
- 改善PPG传感器计量对于可靠的健康状况评估至关重要.
研究的目的:
- 调查不同接触压力和体力活动强度对PPG传感器精度的影响.
- 为了确定最佳的接触压力设置,以提高心率测量精度.
- 为改善PPG传感器在临床和日常使用中的性能提供见解.
主要方法:
- 评估PPG传感器准确度与心电图 (ECG) 参考装置相比.
- 在25名受试者身上测试了一系列接触压力 (20,60,75 mmHg) 和体力活动强度 (3,6,8 km/h).
- 分析了平均绝对百分比误差 (MAPE) 和皮尔森相关系数 (r).
主要成果:
- PPG传感器的精度因接触压力和活动强度而异.
- 最佳性能是在60mmHg的接触压力下实现的,MAPE在3.36%至6.83%之间.
- 皮尔森的相关系数在0.81到0.95之间,表明了强烈的同意.
- 个人最佳压力设置显著降低了测量不确定性,例如,在6公里/小时的速度下,从15bpm降至8bpm.
结论:
- 接触压力是影响PPG传感器心率测量精度的关键参数.
- 60mmHg的接触压力在不同的体力活动水平上表现出卓越的性能.
- 结果为用户和制造商提供了有价值的指导,以提高PPG传感器的计量性能和临床适用性.
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