基于人体加速度多特征融合和K近邻算法的跌倒检测

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中国康复理论与实践 2018 年 7 月第 24 卷第 7 期 Chin J Rehabil Theory Pract, Jul., 2018, Vol. 24, No.7
-ቤተ መጻሕፍቲ ባይዱ865 -
DOI: 10.3969/j.issn.1006-9771.2018.07.022
·康复工程与辅助技术·
基于人体加速度多特征融合和 K 近邻算法的跌倒检测①
随着人口老龄化不断加剧,动态监测老年人活动 状态已成为多学科研究的一个突出领域[1-3]。根据美国 疾病控制和预防中心调查,65 岁及以上老年人中,近
30%经常发生意外跌倒。跌倒会对老年人心理和身体 产生负面影响[4],导致严重伤害,甚至增加老年人死 亡率。有过跌倒经历的老年人因害怕发生跌倒,而不
作者简介:华仙(1986-),女,汉族,浙江金华市人,硕士,主治医师,主要研究方向:老年人康复训练、中西医结合心血管疾病。通讯作 者:席旭刚(1975-),男,汉族,浙江金华市人,博士,副教授,主要研究方向:生物医学信号处理,康复机器人。
acts of falls and eleven of activities of daily life. The information of activities was collected through two acceleration sensors, 81 acceleration features were extracted from each sensor, and were reduced dimension through principal component analysis. K-nearest neighbor was used to detect the falls and activities of daily living. Results The sensitivity of fall detection was 100%, the specificity was 99.76%, and the detection time was 216 ms. Conclusion The algorithm of multi-feature fusion of human body acceleration and K-nearest neighbor is accurate and timely. Key words: fall; detection; human body acceleration; acts; feature extraction [中图分类号] R592 [文献标识码] A [文章编号] 1006-9771(2018)07-0865-04 [本文著录格式] 华仙,席旭刚 . 基于人体加速度多特征融合和 K 近邻算法的跌倒检测[J]. 中国康复理论与实践, 2018, 24(7): 865-868. CITED AS: Hua X, Xi XG. Fall detection based on multi- feature fusion of human body acceleration and K- nearest neighbor [J]. Chin J Rehabil Theory Pract, 2018, 24(7): 865-868.
Fall Detection Based on Multi-feature Fusion of Human Body Acceleration and K-Nearest Neighbor HUA Xian1, XI Xu-gang2 1. Jinhua People's Hospital, Jinhua, Zhejiang 321000, China; 2. Intelligent Control & Robotics Institute of Hangzhou Dianzi University, Hangzhou, Zhejiang 310018, China Correspondence to XI Xu-gang. E-mail: xixugang@ Supported by National Natural Science Foundation of China (No. 61671197) and Zhejiang Public Basic Research Plan (No. LGF18F010006) Abstract Objective To develop a kind of algorithm for fall detection based on human acceleration. Methods From September to November, 2017, six healthy postgraduates participating in the experiment completed 13
器采集人体动作信息,每个加速度传感器提取 81 个加速度特征参数。通过主成分分析降维,输入 K 近邻 (KNN)算法分类器对跌倒和日常动作进行识别。 结果 跌倒检测敏感性 100%,特异性 99.76%,检测时间 216 ms。 结论 加速度多特征融合和 KNN 算法可以实现跌倒的及时有效检测。 关键词 跌倒;检测;人体加速度;动作;特征提取
华仙 1,席旭刚 2
1. 金华市人民医院,浙江金华市 321000;2. 杭州电子科技大学智能控制与机器人研究所,浙江杭州市 310018 通讯作者:席旭刚。E-mail: xixugang@ 基金项目:1. 国家自然科学基金项目(No. 61671197);2. 浙江省基础公益研究计划项目(No. LGF18F010006)。 摘要 目的 探索基于人体加速度的跌倒检测方法。 方法 2017 年 9 月至 11 月,6 例健康青年志愿者完成 13 个跌倒动作和 11 个日常活动动作。通过两个加速度传感