当司机在驾驶途中疲惫犯困时，通常会打开窗户、调大收音机的音量来缓解疲劳。这些年，我们看到了许多的警报系统，包括可以追踪司机眼睛闭合率的EyeAlert驾驶员疲劳监控，还有奥迪研究安装在汽车座椅上的心率监视器。Impecca Alert Band预警带则采用了一种不同的方法，它通过实时监测大脑电活动，在司机开始犯困，情况变得糟糕之前，发出警告，给用户争取更多的时间来做一件事情：停下来休息一会儿。

如InterAxon公司帮助用户提高注意力的智能头带Muse和帮助用户放松的智能耳机MeloMind一样，Impecca Alert Band同样是一款可穿戴脑电波（EEG）设备。它通过监视司机大脑疲劳迹象的脑电波活动，在佩戴者犯困开始打瞌睡发出警报。

Alert Band重量较轻，设计舒适，适合长时间佩戴。Alert Band设有可采集前额脑电波信号的传感器，信号通过蓝牙4.0连接到智能手机APP。据说该款设备充电一次可以使用20个小时。

连接上手机后，通过头带采集到的数据会被转换成一个范围0-100的评估值，0表示驾驶员完全清醒，高于80则表示疲劳程度达到一个危险水平，不利于继续驾驶，应该立即休息。该设备还可以在疲劳达到一定程度时，实时将通知和警告上传给司机的智能手机、亲朋好友和社交网络。

Alert Band预计今年5月发售，价格定在249.99美元。

英文原文

When drowsiness sets in on the road, drivers typically open a window and turn up the radio. We've also seen a number of alert systems introduced over the years, including theEyeAlert Driver Fatigue Monitor, which tracks the eye-closure rate of drivers, and Audi has researched putting herat-rate monitirs in car seats . The Impecca Alert Band takes a different approach. It monitors brain activity and warns drivers that they are becoming fatigued in advance of it becoming dangerous, giving users more time to do the one thing that helps: stop and take a break.

Like the InterAxon Muse and MeloMind devices that aid focus and relaxation respectively, the Alert Band is a wearable electroencephalography (EEG) headset. It monitors the electrical activity in a driver's brain for signs of fatigue and is reported capable of providing alerts 3-5 minutes before the wearer begins to doze off and fall asleep.

Impecca says that the band itself is lightweight and designed to be comfortable to wear for long periods. It features sensors that rest against the user's forehead and connects to an accompanying mobile app for Android and iOS via Bluetooth 4.0. It is also said to have a battery life of up to 20 hours.

The data collected by the headband is translated into a scale of 0-100 on the app, with 0 meaning that the driver is fully awake and anything above 80 meaning that the level of fatigue is considered dangerous for driving and that a break should be taken. The device can also provide real-time notifications and alarms to a driver’s smartphone, family and friends and social networks when monitored fatigue reaches a certain level.

The Alert Band is expected to be available from May of this year at a price of $249.99.