PTE听力口语练习-科学60秒-fall-detection system

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Home Wireless Network Detects Elderly Tumbles


60秒科学节目(SSS)是科学美国人网站的一套广播栏目,英文名称:Scientific American – 60 Second Science,节目内容以科学报道为主,节目仅一分钟的时间,主要对当今的科学技术新发展作以简明、通俗的介绍,对于科学的发展如何影响人们的生活环境、健康状况及科学技术,提供了大量简明易懂的阐释。

°∞I’ve fallen, and I can’t get up!°±

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.

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.

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.

The researchers presented their prototype system at a symposium in London.

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.

–Larry Greenemeier


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