CAJ | 학술논문

目的:在Active One生理信号采集系统基础上采用Labview和VC编程实现基于视觉诱发电位的脑机接口实时系统.方法:数据采集软件采用Labview编程实现,采用VC编程实现脑机接口人机界面、实时信号处理及动态链接库,Labview和VC通过动态链接库共享内存实现数据传输.视觉刺激界面设计采用了多媒体定时、DirectDraw技术和并口输出技术.采用累加平均与5点平均滤波提取视觉诱发电位信号,再通过计算相关系数实现信号识别.结果:实验表明刺激模块能产生有效的视觉刺激.基于动态链接库的数据传输能满足系统要求,实现VC与Labview程序的同步控制,结论:本文提出的实时信号处理方法能提高信噪比,实现视觉诱发电位的提取与识别,判断出受试者所注视的目标,并将结果实时反馈到人机界面,实现了脑机接口实时系统.
목적:재Active One생리신호채집계통기출상채용Labview화VC편정실현기우시각유발전위적뇌궤접구실시계통.방법:수거채집연건채용Labview편정실현,채용VC편정실현뇌궤접구인궤계면、실시신호처리급동태련접고,Labview화VC통과동태련접고공향내존실현수거전수.시각자격계면설계채용료다매체정시、DirectDraw기술화병구수출기술.채용루가평균여5점평균려파제취시각유발전위신호,재통과계산상관계수실현신호식별.결과:실험표명자격모괴능산생유효적시각자격.기우동태련접고적수거전수능만족계통요구,실현VC여Labview정서적동보공제,결론:본문제출적실시신호처리방법능제고신조비,실현시각유발전위적제취여식별,판단출수시자소주시적목표,병장결과실시반궤도인궤계면,실현료뇌궤접구실시계통.
Objective:Labview and VC were used to design software based on the Active One biopotential measurement system to realize the visual evoked potential based brain-computer interface.Methods:The data acquisition software was designed by Labview,the human-interface,real time signal processing and dynamic link library software were designed by VC.Data transmission between Labview and VC was realized through the dynamic link library using shared memory technology.The multimedia timer,DirectDraw technology and parallel port data output were used to design the visual stimulation interface.The 5 points averaging filter combining with averaging method were used to detect the visual evoked potential and the correlation coefficient was computed for signal recognization.Results:The experiments showed that the visual stimulator can produce effective visual stimulation.The data transmission method using the dynamic link library can satisfy the requirement of the system.Conclusions:The real-time signal processing method can improve signal-noise ratio and realize detection and recognization of visual evoked potential.The system can determine which module the subject was fixating and the result was feedback to the subject in real time.