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用意念来控制手机拨号

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小编摘要:听说过用意念来控制手机拨号吗?如果你拥有这样的手机的话,你会第一个打给谁呢?

人脑—计算机接口(brain-computer interface,即BCI),是一种双向脑机接口,它允许大脑和外部设备间进行双向信息交换。这种系统需要扫描人脑并从中得到脑波信号,之后再将脑波信号转换成能被电脑等设备识别出的数字信号。BCI系统的设计初衷主要是为了方便那些手脚行动不便的残疾人,那么现在的它的发展达到何种程度了呢?


美国加利福利亚大学的研究团队已经研发出了一个蓝牙系统,依靠该系统使用者可以用意念来给手机拨号,神经工程学杂志(Journal of Neural Engineering)在日前对这款设备进行了报道。

试验在一个标准的办公室里进行,10位志愿者分别坐在一张舒适的椅子上,与电脑屏幕保持60厘米的距离,他们需要佩戴一个特殊的布满4个电极的脑电图描记器(EEG)头带,电极全部分布在前额处。

在试验开始前,志愿者需要先注视电脑的数字,确认EEG头带与手机是相连的。随后试验开始,电脑屏幕会闪现类似触屏手机的拨号盘,与手机不同的是,电脑拨号盘上的数字会以不同的频率闪动,志愿者在看到所需要的数字时,EEG头带会捕捉到人脑所发出的信号,这时只要志愿者再注视屏幕中的enter键,数字即可被传送至蓝牙手机中。
若数字有误,则志愿者需要注视backspace键,数字就会被取消,这样就可以实现用脑袋控制手机拨号的构想了。实验结果是:7名志愿者无误的输入了11位数字,平均用时是88.9秒,且研究人员称志愿者使用这套系统的准确率可达70%-85%,只要经过训练,准确度还能得到提高。

其实这种技术好是好,就是还要记号码,这对大多数人来说都是一件痛苦的事情呢。

以下是相关的英文报道:
Researchers from the University of California in San Diego have developed a Bluetooth device that allows the wearer to dial a ten-digit number using their thoughts alone. Their experimental device was the subject of a recent study, published in the Journal of Neural Engineering.
In their study, volunteers wore special electrode-laden headgear and were shown a screen with the numbers zero through nine, similar to a phone’s touch-tone dialing pad. The difference was that each number flashed at a slightly different speed. By concentrating on the number they wished to dial, the device detected the speed of the flashing number by observing the user’s brain activity. It’s a bit tedious, but the researchers found users could control the system with 70-85% accuracy.

Though this may seem like an awful lot to go through to simply dial a phone number, the study’s primary goal was to demonstrate that brain computer interface technology can work with the same everyday technology millions of people use. In their abstract, the researchers acknowledge that bringing these kind of cutting-edge interfaces to a broader audience is a huge challenge, but wanted to show that these can be overcome. They write:

To the best of our knowledge, this study is the first to demonstrate a truly portable, cost-effective and miniature cell-phone-based platform for online [brain computer interfaces].
This won’t be the hot new iPhone peripheral anytime soon, and you won’t be tweeting your thoughts for quite a long while, but scientists are already showing that these kinds of innovations aren’t really that far off.
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2011-04-18 14:11 编辑:mondream
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