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Home Wireless Network Detects Elderly Tumbles
家庭无线网络可以检测老人是否跌倒
“I’ve fallen, and I can’t get up!”
我倒在地上，起不来了！
Years ago, the best option for people in this position was to press a button on their monitoring device and call for help. But that’s not always possible, especially if such a fall renders a person unconscious.
数年前，这种状况下最好的选择是按下检测设备上的按钮求救。但是，这不一定每次都行，尤其是摔倒之后失去意识。
So electrical engineers at the University of Utah have come up with a fall-detection system that instead relies on wireless sensors placed around a room. The sensors emit wireless signals that bounce off of whatever’s in the room and create a 3-D map using radio tomographic imaging.
因此，犹他州立大学的电气工程师想出了依靠放置在房间附近的无线传感器的跌倒检测系统。传感器发射无线信号，从房间里的物体上发生反射，利用无线电断层成像创建3D地图。
By setting the sensors at different heights, you can tell when someone is standing, sitting or lying down, and for how long. Once the room is mapped, you can program the system to send an alert whenever there’s a fall-like movement, or an unusual period of no movement.
通过设置不同高度的传感器，可以判断人是站着，坐着或躺着，包括保持一种状态的时间。一旦房间被建立地图，你可以设定程序在任何时候有疑似摔倒动作或者不寻常动作的时候给你发警报。
The researchers presented their prototype system at a symposium in London.
研究人员在伦敦的一个研讨会上介绍了他们的原型系统。
The technology has obvious application as a home monitoring system for the elderly. No need for them to wear a button on a string around their neck as a constant reminder that gravity is their enemy.
该技术明显适用于老人家庭监控系统。不需要老人在脖子上戴一个有按钮的绳子来及时提醒他们重力是他们的敌人。
—Larry Greenemeier
