官方APP下载:英语全能特训(微信小程序版,支持苹果手机、安卓手机)
创办于2003年
UNSV记不住?那就记中文谐音“忧安思危”吧!
  Slow and Steady Wins the Race!
UNSV英语学习频道 - Slow and steady wins the race!
英语全能特训(微信小程序)
UNSV英语学习频道淘宝网店
客服短信:18913948480
客服邮箱:web@unsv.com
初级VIP会员
全站英语学习资料下载。
¥98元/12个月

SCIENCE IN THE NEWS - Scientists Develop a Robot That Can Assemble Itself

阅读次数:


VIP会员专享下载:(非VIP会员无权下载!如果想下载,但还不是VIP会员,请点此订购
下载方式:使用鼠标右键(注意是鼠标右键!)点击下面的MP3音频/MP4视频链接,然后选择“另存为…”。
MP3节目录音 MP3节目录音  PDF节目文稿 PDF节目文稿  MP3同步字幕 MP3同步字幕 
文章正文
同步字幕
A self-folding robot is seen this photo provided by MIT.
A self-folding robot is seen this photo provided by MIT.

Origami is the Japanese art of shaping paper to look like animals, flowers and other objects. Now, Harvard University scientists have modeled, or formed a robot on the ancient art form. They have created designs that robots can follow to assemble themselves, or put themselves together.

Sam Felton builds robots. The Harvard graduate student works at the university's Microrobotics Laboratory. His most recent creation is a robot 18 centimeters wide and 15 centimeters long. It has four moving legs and looks like a crab. Sam Felton spoke to VOA on Skype.

"We started with the desire to make robots as quickly and cheaply as possible. And so we looked to origami in order to find ways to create a very complex and functional machine. Mathematically, origami can create almost anything you want. But the trick is to actually get it to happen in real life with real materials."

Mr. Felton starts with what are called shape memory polymers. These are flat plastic sheets that change shape when they are heated. Electronics placed between the layers, or levels, of material are programmed, or set, to start the folding action. A battery provides the power.

"And we supplied these with current, much like you would supply a light bulb with current, and that heats up that local area to above 100 degrees Celsius. Once it hits 100 degrees Celsius, the shape memory polymers shrink, and that pulls on the paper, causing it to fold over."

The paper starts folding itself within 10 seconds.

"And as soon as that brain is told to start running, it goes through the process of telling each circuit to turn on or off and once it knows that it's assembled, it tells the robot to walk forward."

It takes about four minutes for the robot to assemble itself.

"What we've shown here is that you can embed all these systems onto an autonomous robot and cause it to control its own folding."

Mr. Felton wrote about his work in the journal Science. He says the process permits researchers to quickly produce complex robots that can build themselves into different sizes, depending on what they must do. The robots are also strong for their weight. One valuable quality is that self-building robots can be shipped flat in large numbers, then unfold themselves where they are needed.

"I like to think about assembling in space. If you could send a ream of flat sheets up, that then turn themselves into satellites or even send that team to another planet and have it turn itself into a new base."

Sam Felton says such machines have other possible uses. They could, for example, be placed in the narrow spaces of a collapsed building and unfold themselves to look for and rescue people.

I'm Mario Ritter.

This story was based on a report by Rosanne Skirble and adapted by Mario Ritter.

----------------

Words in the News

ancientadj. very old; from long ago

functional – adj.in good working order, serving a useful purpose

programmed – adj. something that has been given computer instructions to perform a task, to behave or think in a certain way

fold – v. to lay one part over another

robots – n. a machine that moves and performs work

网友的学习评论(0条):
版权所有©2003-2019 南京通享科技有限公司,保留所有权利。未经书面许可,严禁转载本站内容,违者追究法律责任。 互联网经营ICP证:苏B2-20120186
网站备案:苏ICP备05000269号-1中国工业和信息化部网站备案查询
广播台