The Hardware Design Of Portable Wireless BCI

Brain - machine interface is a not dependent on the brain - machine (computer or other devices) communication system of brain normal output pathways (i.e., peripheral nerve and muscle). In brain research, neural remedy, function recovery, aerospace and game toy,this technology has broad prospect of application and great economic potential. In view of the present brain - machine interface device is big and expensive faults, this paper puts forward a kind of portable wireless eeg acquisition device, so the application of brain - machine interface popularization. The main research contents for: firstly, this paper reviews the brain - machine interface development history and current research status, and eeg analysis based on the characteristics of the system, and puts forward the overall design scheme. This signal acquisition system solutions including preamplifier, high-pass filltering, remove 50Hz power frequency interference, low-pass filter, level 40Hz migration and later stage amplifier. Use A/D circuit, converted into digital signals. After voltage conversion, then through bluetooth wireless module implements and superordination machine wireless communication; PC procedure mainly through complete, can realize the Labview write for storage and data display next place machine control.This topic has completed the system of production, and the brain - machine interface preliminary experiment. Through the test of the whole system, this system could continue eeg acquisition, after experimental comparison shows that system collection to signal noise is low, can obtain clear stable eeg. Therefore, this system can applied to brain - machine interface, it is not only smaller, easy to carry, but also has the low power consumption, wireless transceiver characteristic.