Simple fall criteria for MEMS sensors: data analysis and sensor concept.
Simple fall criteria for MEMS sensors: data analysis and sensor concept.
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DOI：
10.3390/s140712149
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发表时间：
2014-07-08
期刊：
影响因子：
--
通讯作者：
Younis MI
中科院分区：
文献类型：
--
作者：
Ibrahim A;Younis MI
本文基于人类跌倒和日常生活活动（ADL）的详细实验数据，提出了一种新的、简单的跌倒检测概念。建立与 MEMS 传感器兼容的适当跌倒算法需要有关跌倒和 ADL 的详细数据，这些数据清楚地表明人体上可能的传感器节点位置（例如臀部、头部和胸部）的运动学变化。目前，缺乏与这些节点位置相关的每个加速度分量的确切方向和大小的数据。这对于 MEMS 结构至关重要，因为 MEMS 结构的惯性元件非常靠近基板并且具有电容偏置，因此对于运动方向（无论是朝向还是远离基板）都非常敏感。这项工作提供了各种跌倒和 ADL 期间人体不同位置的加速度分量的详细数据。使用二自由度模型来帮助解释实验数据。然后建立了基于MEMS开关的跌倒检测算法。提出了一种基于该算法的新传感概念。该概念基于采用多个惯性传感器，这些惯性传感器在接收到真实的跌倒信号时作为串联的电气开关同时触发。在日常生活活动中，一些开关或不会被触发，从而导致开路配置，从而防止误报。提出了该器件的集总参数模型，并给出了初步仿真结果，说明了新器件的概念。
This paper presents a new and simple fall detection concept based on detailed experimental data of human falling and the activities of daily living (ADLs). Establishing appropriate fall algorithms compatible with MEMS sensors requires detailed data on falls and ADLs that indicate clearly the variations of the kinematics at the possible sensor node location on the human body, such as hip, head, and chest. Currently, there is a lack of data on the exact direction and magnitude of each acceleration component associated with these node locations. This is crucial for MEMS structures, which have inertia elements very close to the substrate and are capacitively biased, and hence, are very sensitive to the direction of motion whether it is toward or away from the substrate. This work presents detailed data of the acceleration components on various locations on the human body during various kinds of falls and ADLs. A two-degree-of-freedom model is used to help interpret the experimental data. An algorithm for fall detection based on MEMS switches is then established. A new sensing concept based on the algorithm is proposed. The concept is based on employing several inertia sensors, which are triggered simultaneously, as electrical switches connected in series, upon receiving a true fall signal. In the case of everyday life activities, some or no switches will be triggered resulting in an open circuit configuration, thereby preventing false positive. Lumped-parameter model is presented for the device and preliminary simulation results are presented illustrating the new device concept.
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影响因子：
2.2
作者：
Bourke, A. K.;Lyons, G. M.
通讯作者：
Lyons, G. M.
影响因子：
3.2
作者：
Lindemann, U;Hock, A;Becker, C
通讯作者：
Becker, C
影响因子：
4.3
作者：
Lai, Chin-Feng;Chang, Sung-Yen;Huang, Yueh-Min
通讯作者：
Huang, Yueh-Min
DOI：
10.1115/1.1408940
发表时间：
2001-12-01
影响因子：
1.7
作者：
Sandler, R;Robinovitch, S
通讯作者：
Robinovitch, S
影响因子：
2.4
作者：
Bourke, A. K.;O'Brien, J. V.;Lyons, G. M.
通讯作者：
Lyons, G. M.