摘 要：脑—机接口（Brain—computer interface，BCI）是一种可以读取人脑中的生理电信号并分析其含义，然后将其转换为控制信号直接对外部设备进行操控的系统。它的出现为人脑与计算机或其它电子设备之间的交流提供一种新的方式，在医疗康复领域和娱乐领域具有广阔的应用前景。
本文设计了一款用于乐高拼装小车的脑电控制系统。本系统包括脑电信号采集发送器，脑电信号数据接收处理平台，乐高小车控制平台和乐高拼装小车四大模块。首先，基于MindSet脑电耳机的蓝牙数据发射器，设计脑电信号接收处理平台。该平台由Delphi制作，可以从数据流中提取出大脑集中度和冥想度两个指标；然后，设计乐高拼装小车的控制平台。该平台由LabView编写，具有良好的人机界面及乐高小车控制模块，可以根据大脑的集中度和冥想度的数值高低来控制乐高小车的速度和机械爪的开合。
系统测试结果表明，该系统具有实时性强、可靠性高的优点，为脑—机接口产品的开发奠定了一定的技术基础。
关键字：MindSet脑电耳机；蓝牙SPP(Serial Port Profile)协议；乐高拼装小车；脑电控制
Abstract: Brain-computer interface (BCI) is a novel human-computer interface for direct communication between brain and computers or other electric devices .BCI can provide a new communication option that does not depend on peripheral nerves and muscles for those with neuromuscular impairments, and might also give those without disabilities a supplementary control channel or a control channel useful in special circumstances. So, it has great social value and application prospect.
This paper designes a EEG control system for the build-up Lego car. This system includes the brain signal acquisition transmitter, the EEG data receiving and processing platform, Lego car control platform and the assembled Lego car. Firstly, I designed the EEG signal receiving and processing platform in this system based on the Bluetooth data transmitter of the MindSet EEG headset. This platform is made by Delphi, which can extract the brain concentration and the meditation from the data stream. Secondly, I designed the Lego assembled car control platform. This platform that was programed by LabView has a good human- interface and the control module for the Lego assembled car. According to the level of brain concentration and meditation, this platform can control the speed of LEGO car and the opening and closing of the mechanical grippers.
The experimental results show that this designed system has the featuers of real-time, high reliability. In a word, the EEG control which can be developed in the various domains and has a good application prospects is a novel technology.
Keywords: MindSet headset; Bluetooth SPP protocol; Lego assembled car; EEG control
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