The design of a practical and reliable fall detector for community and institutional telecare
The design of a practical and reliable fall detector for community and institutional telecare
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DOI：
10.1258/1357633001934483
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发表时间：
2000-01-01
影响因子：
4.7
通讯作者：
McIntosh, A
中科院分区：
文献类型：
--
作者：
Doughty, K;Lewis, R;McIntosh, A
对于体弱的老年人来说，跌倒是独立生活的最大障碍之一。早期发现它们是为人们提供维持积极生活方式所需的保证和信心的重要一步。我们调查了一个与社区报警系统相连的磨损跌倒探测器。磨损的设备是唯一令人满意的设备，只要它很少产生误报。我们开发的跌倒探测器只有小型无线电寻呼机大小。它采用两阶段检测过程来感应震动和佩戴者的方向。 20 秒内检测到跌倒，并向社区警报系统触发无线电信号。测试设计使用关节人体模型来模拟五种跌倒模式，以了解撞击对身体不同部位的影响。这使我们能够为传感器选择适当的触发阈值和佩戴位置。 20 人对原型进行了评估，以观察误报情况。最终的设计能够在 180 种不同的跌倒场景中进行可靠的检测。
Falls are one of the greatest obstacles to independent living for frail and elderly people. Their early detection is an important step in providing people with the reassurance and confidence necessary to maintain an active lifestyle. We have investigated a worn fall detector linked to a community alarm system. A worn device is the only one which is satisfactory, provided that it generates few false alarms. The fall detector we have developed is the size of a small radio pager. It uses a two-stage detection process which senses shock and the orientation of the wearer. A fall is detected within 20 s and triggers a radio signal to a community alarm system. Tests were devised using a jointed mannequin to simulate five modes of falling to understand the effects of impact at different parts of the body. This allowed us to select the appropriate trigger threshold and wearing positions for the sensor. Prototypes were evaluated with 20 people to observe false alarms. The final design allowed reliable detection in 180 different falling scenarios.