本文選題：腦電信號(hào) + 虛擬現(xiàn)實(shí)　； 參考：《蘭州大學(xué)》2017年碩士論文

【摘要】：腦機(jī)接口(Brain-Computer Interface,BCI)是指在人腦和電子設(shè)備之間建立不依賴于常規(guī)大腦信息輸出通路(外周神經(jīng)和肌肉組織)的全新對(duì)外信息交流和控制技術(shù)。其中腦電生物反饋療法(Electroencephalogram Biofeedback or Neurofeedback)是腦機(jī)接口與生物反饋療法相結(jié)合的重要應(yīng)用。近年來,隨著虛擬現(xiàn)實(shí)(Virtual Reality,VR)技術(shù)的發(fā)展,生物反饋療法也開始嘗試采用VR系統(tǒng)。本研究針對(duì)現(xiàn)有生物信息反饋系統(tǒng)以及BCI系統(tǒng)的不足,將BCI技術(shù)與虛擬現(xiàn)實(shí)相結(jié)合,構(gòu)建面向腦機(jī)接口的虛擬現(xiàn)實(shí)放松系統(tǒng)。整個(gè)系統(tǒng)中,采用Brain Link Lite作為腦電信號(hào)采集器,使用C#開發(fā)了腦電采集軟件,使用Unity3D開發(fā)了虛擬現(xiàn)實(shí)場(chǎng)景,采用智能手機(jī)作為系統(tǒng)的終端,通過無線通信進(jìn)行數(shù)據(jù)傳輸,實(shí)現(xiàn)了一個(gè)實(shí)時(shí)反饋的BCI系統(tǒng)和3D虛擬現(xiàn)實(shí)環(huán)境。在保證放松效果的同時(shí),增強(qiáng)了虛擬現(xiàn)實(shí)反饋系統(tǒng)的便攜性、高效性。最后為了研究系統(tǒng)的放松效果和虛擬現(xiàn)實(shí)場(chǎng)景的臨在感,進(jìn)行了實(shí)證研究。實(shí)驗(yàn)采用隨機(jī)分組前測(cè)后測(cè)的方法,將20名被試隨機(jī)分為實(shí)驗(yàn)組和對(duì)照組,其中每組10人,采用調(diào)查問卷的方法評(píng)估系統(tǒng)的放松效果,同時(shí)研究了系統(tǒng)的臨在感與放松效果之間的關(guān)系。運(yùn)用臨在感調(diào)查問卷研究了獲取臨在感的影響因素和臨在感的各個(gè)因素所占比重。進(jìn)行狀態(tài)特質(zhì)焦慮問卷(State-Trait Anxiety Inventory,STAI)組內(nèi)比較,實(shí)驗(yàn)組狀態(tài)焦慮值后測(cè)分?jǐn)?shù)低于前測(cè),且差異顯著,對(duì)照組差異不顯著(p0.05)。進(jìn)行STAI組間比較,狀態(tài)焦慮值實(shí)驗(yàn)組前測(cè)與后測(cè)分?jǐn)?shù)的差值高于對(duì)照組,且兩組差異顯著(p0.05)。得出沉浸式虛擬現(xiàn)實(shí)場(chǎng)景具有更好的心理放松效果。沉浸環(huán)境比非沉浸環(huán)境具有更強(qiáng)的臨在感,更好的放松效果。說明本文設(shè)計(jì)面向腦機(jī)接口的虛擬現(xiàn)實(shí)放松系統(tǒng)具有良好的心理放松效果,較強(qiáng)的臨在感。
[Abstract]:Brain-Computer Interface (Brain-Computer Interface) is a new technology for information exchange and control between human brain and electronic devices, which does not depend on the conventional brain information output pathway (peripheral nerve and muscle tissue). Electroencephalogram Biofeedback or Neurofeedback) is an important application of brain computer interface and biofeedback therapy. In recent years, with the development of Virtual reality (VR) technology, biofeedback therapy has begun to use VR system. Aiming at the deficiency of the existing bioinformatics feedback system and BCI system, this study combines the BCI technology with the virtual reality, and constructs a virtual reality relaxation system oriented to the brain computer interface. In the whole system, Brain Link Lite is used as EEG collector, EEG acquisition software is developed with C #, virtual reality scene is developed with Unity3D, smart phone is used as the terminal of the system, and data transmission is carried out through wireless communication. A real-time feedback BCI system and 3 D virtual reality environment are implemented. At the same time, it enhances the portability and efficiency of the virtual reality feedback system. Finally, an empirical study is carried out to study the relaxation effect of the system and the presence of virtual reality scene. Twenty subjects were randomly divided into experimental group and control group, 10 in each group. The relaxation effect of the system was evaluated by questionnaire. At the same time, the relationship between the presence of the system and the relaxation effect is studied. The influencing factors and the proportion of each factor of the sense of presence were studied by using the questionnaire of the sense of presence. The results of State-Trait Anxiety inventory (STAI) showed that the post-test scores of state anxiety in the experimental group were lower than those in the pre-test, and the difference was significant, but the difference in the control group was not significant (p 0.05). The difference between pre-test and post-test scores in the experimental group was higher than that in the control group, and the difference between the two groups was significant (p 0.05). It is concluded that the immersive virtual reality scene has better psychological relaxation effect. Immersion environment has stronger sense of presence and better relaxation effect than non-immersion environment. It shows that the design of virtual reality relaxation system for brain-computer interface has good psychological relaxation effect and strong sense of presence.
【學(xué)位授予單位】：蘭州大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：R318;TP391.9

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