Wang Jie, Sun Yeke, Chen Zhenglong, Jin Yongchun, Xu Yunhua
Shanghai Chest Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200030.
Medical Instrumentation College, Shanghai University of Medicine & Health Sciences, Shanghai, 201318.
Zhongguo Yi Liao Qi Xie Za Zhi. 2023 May 30;47(3):278-283. doi: 10.3969/j.issn.1671-7104.2023.03.009.
A protective device was designed that can be worn on the elderly, which consists of protective airbag, control box and protective mechanism. The combined acceleration, combined angular velocity and human posture angle are selected as the parameters to determine the fall, and the threshold algorithm and SVM algorithm are used to detect the fall. The protective mechanism is an inflatable device based on CO compressed air cylinder, and the equal-width cam structure is applied to its transmission part to improve the puncture efficiency of the compressed gas cylinder. A fall experiment was designed to obtain the combined acceleration and angular velocity eigenvalues of fall actions (forward fall, backward fall and lateral fall) and daily activities (sitting-standing, walking, jogging and walking up and down stairs), showing that the specificity and sensitivity of the protection module reached 92.1% and 84.4% respectively, which verified the feasibility of the fall protection device.
设计了一种可穿戴在老年人身上的保护装置，它由保护气囊、控制盒和保护机构组成。选择组合加速度、组合角速度和人体姿态角作为判定跌倒的参数，采用阈值算法和支持向量机算法来检测跌倒。保护机构是基于CO压缩气瓶的充气装置，其传动部分采用等宽凸轮结构以提高压缩气瓶的穿刺效率。设计了跌倒实验以获取跌倒动作（前倒、后倒和侧倒）及日常活动（坐立、行走、慢跑和上下楼梯）的组合加速度和角速度特征值，结果表明保护模块的特异性和灵敏度分别达到了92.1%和84.4%，验证了跌倒保护装置的可行性。
