可穿戴式老年人跌倒防护装置设计与研究

Design and Research of Wearable Fall Protection Device for the Elderly

该研究设计了一套可穿戴在老年人身上的防护装置,该装置由防护气囊、控制盒和防护机构组成。选择合加速度、合角速度及人体姿态角作为判定跌倒参数。利用阈值算法和SVM算法检测跌倒。防护机构是基于CO_(2)压缩气瓶的充气装置,其传动部分采用等宽凸轮结构,提高了压缩气瓶的穿刺效率。设计跌倒实验提取跌倒动作(向前跌倒、向后跌倒和侧向跌倒)和日常活动(坐下-起立、走路、慢跑和上下楼梯)合加速度和合角速度特征值,表明防护模块的特异度和灵敏度分别达到92.1%和84.4%,验证了跌倒防护装置的可行性。

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_(2) 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.