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Title:: Research on the correlation between human head and waist in fall detection

作者:: 周闯1; 傅珈豫2; 缪伟伟3; 雷中贵1; 王勤1; 4; 王志雄1; 3; 5△; 娜日苏1; 3△; 1.上海理工大学，上海 200093 ；2.源珈力医疗器材国际贸易（上海）有限公司，上海 200000；3.日本国立大阪大学医学研究科，吹田 565-0871；4.上海环境保护信息中心，上海 200030；5.上海健康医学院，上海 201318

Author(s):: ZHOU Chuang1; FU Jiayu2; MIAO Weiwei3; LEI Zhonggui1; WANG Qin1; 4; WANG Zhixiong1; 3; 5; NA Risu1; 3; 1.University of Shanghai for Science and Technology，Shanghai 200093,China;2.Yuan Jia-li Medical Equipment International Trade (Shanghai) Co., Ltd., Shanghai 200000;3. Graduate School of Medicine/Faculty of Medicine, Osaka University, Suita 565-0871,Japan;4.Shanghai Environmental Protection Information Center ,Shanghai 200030;5.Shanghai University of Medicine & Health Sciences，Shanghai 201318

摘要:: 本研究采用惯性传感器对跌倒过程中人体头部和腰部的运动学数据进行相关性分析，由志愿者模拟五种日常活动动作和四种跌倒动作，进行大量模拟试验。发现在实验条件下，人体头部和腰部的合加速度相关性极低或不相关，头部和腰部的合加速度偏离竖直方向的角度在大部分日常活动中相关性极低或不相关，但在跌倒过程中，具有较高相关性。该结论可为跌倒的预测及检测提供一种新方法。

Abstract:: In this research, the inertial sensor was used to analyze the correlation between the head and the waist in the human body. The four volunteers simulated five kinds of daily activities and four kinds of fall movements. With a large number of simulation experiments, we found that under the experimental conditions, the correlation of resultant acceleration between the head and waist was extremely low or irrelevant. The angle of the head and waist which between the resultant acceleration and the vertical direction had lower correlation or irrelevant in most daily activities, but was higher level during the fall. This conclusion may provide a new method for the prediction or detection of falls.