The Research And Implementation Of The Human-Computer Interaction System Based On The Combination Of EOG And EEG

Taking bioelectricity as the information carrier, human-computer interaction (HCI) technology is an important research direction in the field of computer application and information processing, related research work has great scientific significance and application prospect. The past HCI systems based on bioelectrical technology mostly rely on a certain kind of bioelectricity as a means of achieving HCI, such as EOG signal or EEG signal. This thesis designed and implemented two HCI systems based on the combination of EOG and EEG. The main work is as follows:1、 Analysis and research of the design principles of the HCI systems based on EOG and EEG from some aspects like the types of bioelectrical signals, the transmission ways of signals and the processing algorithms of signal data. Processing work to EOG and EEG include:The first, identifying the blinking movements and accumulating the continuous blinking according to the waveform features of EOG, the blinking identification is determined by the half points of the signals peak, peak and trough values, as well as the spaces between peaks and valleys and other characteristic values, we determine whether there exists a set of continuous blinking based primarily on the peak space between the two blinking signals. The second, detecting alpha waves in EEG according to FFT, the main method is once the system received data of one second, it will apply FFT to them, and the alpha waves will be generated if the peak value of brainwave frequency at this second is between8and12.2、Design and implement the multimedia control system based on the combination of EOG and EEG (including wireless Bluetooth and wired signal transmission modes). The concrete work includes:expounding the system flow and function chat; dividing the two systems’modular into three parts, they are signal acquisition and transmission modular, bioelectrical processing modular and the control commands generated modular; The signal acquisition and transmission modular expounds the working flow of the signal acquisition and transmission; the bioelectrical processing modular expounds the methods to analyze and research the EOG and EEG; the control commands generated modular mainly implement the transformation from the outputs of the biological electricity processing modular into the control commands of multimedia player.The thesis makes the EOG and EEG signal combined to be the import of HCI systems, so as to makes the use of biological electric more reasonable.