用于老年人安全检测的可穿戴式惯性开关的研制

Development of Wearable Inertial Switches of Security Detection for the Elderly

为了满足日常生活中老年人安全监护的要求,设计了一款用于跌倒检测的万向可穿戴式惯性开关。利用Ansys软件对惯性开关进行动态仿真分析,结果表明:惯性开关在空间任意方向的阈值加速度为4.24g,接触时间大于200μs,具有良好的接触性能。采用UV-LIGA叠层光刻和精密微电铸工艺制作惯性开关,并利用落锤试验对惯性开关进行动态测试,结果表明:在大于5g阈值加速度作用下惯性开关可实现闭合的功能,接触时间大于100μs,能够满足应用要求。

In order to meet the requirements of safety monitoring for the elderly in daily life,a space-omnidirectional wearable inertial switch for fall detection was designed.The dynamic simulation analysis of the inertial switch by Ansys software shows that the threshold acceleration of the inertial switch can be closed in any omnidirectiona of the space at an acceleration of 4.24g,and the contact time of the switch is more than 200μs,which has good contact performance.Finally,the fabrication of the inertial switch was realized by using UV-LIGA multilayer photolithography and precision micro electroforming,and the dynamic test of the switch is carried out by the drop hammer experiment.The test results showed that the inertial switch can be closed at an acceleration of more than 5g,and the contact time is more than 100μs,which can meet the application requirements.