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A wearable omnidirectional inertial switch of security detection for the elderly
Microsystem Technologies ( IF 2.1 ) Pub Date : 2022-07-29 , DOI: 10.1007/s00542-022-05339-z
Liqun Du, Bingjiang Guo, Yakun Dong, Dejian Kong, Jian Zhao, Xuqiang Liu, Junshan Liu

For the purpose of monitoring security for the elderly in daily life, a novel space-omnidirectional wearable inertial switch was designed, fabricated and tested for fall detection system in this paper. Omnidirectional dynamic response of the inertial switch was simulated and analyzed using ANSYS software. The simulation results indicated that the inertial switch can be closed in the omnidirectional space at an acceleration of 4.24 g, the response time of the switch is less than 2.6 ms, and the contact time of the switch is more than 200 μs. Besides, the inertial switch was fabricated using UV-LIGA multilayer photolithography and precision micro electroforming technologies, and the dynamic test of the switch was carried out by the drop hammer experiment. The test results showed that the inertial switch can be closed at an acceleration of more than 5 g. Meanwhile, all contact time is more than 110 μs and the longest is 366 μs, which can meet the application requirements.



中文翻译:

一种可穿戴的老年人安全检测全向惯性开关

以老年人日常生活安全监控为目的,本文设计、制作并测试了一种新型空间全方位可穿戴惯性开关,用于跌倒检测系统。使用ANSYS软件对惯性开关的全向动态响应进行了仿真分析。仿真结果表明,惯性开关可以在全向空间内以4.24 g的加速度闭合,开关的响应时间小于2.6 ms,开关的接触时间大于200 μs。此外,采用UV-LIGA多层光刻和精密微电铸技术制作了惯性开关,并通过落锤实验对开关进行了动态测试。测试结果表明,惯性开关可以在加速度超过 5 g 时闭合。同时,所有接触时间均大于110 μs,最长可达366 μs,可满足应用要求。

更新日期:2022-07-30
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