论文:2014,Vol:32,Issue(2):268-272
引用本文:
谢松云, 王立楠, 张斌, 吴悠, 张筠鹏. 用于飞行员状态监控的视觉空间选择性注意研究[J]. 西北工业大学
Xie Songyun, Wang Linan, Zhang Bin, Wu You, Zhang Yunpeng. On Spatial Selective Attention Pattern and Its Application to Monitoring of Pilot's Brain Function State[J]. Northwestern polytechnical university

用于飞行员状态监控的视觉空间选择性注意研究
谢松云, 王立楠, 张斌, 吴悠, 张筠鹏
西北工业大学 电子信息学院, 陕西 西安 710072
摘要:
如何在大量的、杂乱的、纷呈的信息中对特定的目标保持警觉,对专门的态势保持专注,是战争中无人机操控员和飞行员需要面临的重要问题,为确保其高度的警觉度,对他们的精神状态进行科学监控的研究显得尤为重要。当被试选择注意一侧空间视场,而忽略另外一侧视场的闪烁视觉刺激时,会诱发稳态视觉诱发电位。采用双视场视觉刺激范式诱发视觉稳态诱发电位,用以研究人的视觉空间选择注意模式。视觉刺激序列为左右两列叠加在闪烁色块背景上的字符流序列。左侧闪烁背景的闪烁频率为12 Hz,右侧的为8 Hz。通过实测实验、特征提取及数据分析可知,当被试注意一侧的视觉闪烁刺激时,会在对后侧的顶枕区引发与闪烁同频率的SSVEP震荡,且其幅值在注意时比非注意模式有显著增强。研究结果表明,该方法可以实时监控提醒飞行员精神状态,有效地辅助飞行员的驾驶操作。
关键词:    空间选择注意    脑电    脑功能状态监测    稳态视觉诱发电位    警觉度   
On Spatial Selective Attention Pattern and Its Application to Monitoring of Pilot's Brain Function State
Xie Songyun, Wang Linan, Zhang Bin, Wu You, Zhang Yunpeng
Department of Electronics Engineering, Northwestern Polytechnical University, Xi'an 710072, China
Abstract:
One of the vital problems confronted by pilots or manipulators of Unmanned Aircraft now is how to re-main vigilant towards certain targets among vast amount of information. In order to improve their vigilances, it is es-sential to monitor their mental states. Steady-state visual evoked potentials (SSVEP ) can be induced when paying attention to only a portion of the visual fields but ignoring the rest. In order to study the spatial selective attention pattern, we design the experiment paradigm that SSVEP is evoked by a dual-field visual stimulation. Two different stimulation sequences are distributed to the visual fields separately, which are a series of alphabets or numbers dis-played at 12Hz on the left square and at 8Hz on the right square. Then we detect the Electroencephalogram (EEG) signals and extract the features of SSVEP from the EEG signals. After data analysis we find that SSVEP signal oscil-lates at the exact same frequency toward the attended stimulation but locates at the parietal-occipital area opposite to it. The amplitude increases significantly compared with that extracted under unfocused condition. So we could con-clude that our method is efficient for monitoring the pilots' metal states, thus assisting them efficiently to operate correctly.
Key words:    bioelectric potentials    brain    data reduction    efficiency    electroencephalography    experiments    feature extraction    monitoring    neurophysiology    spatial selective attention    steady-state visual evoked potential (SSVEP)    vigilance   
收稿日期: 2013-10-12     修回日期:
DOI:
基金项目: 国家自然科学基金(30470459);国家重点实验室基金(9140C530303110C5304);西北工业大学基础研究基金(0800-W018102);西北工业大学研究生创业种子基金(Z2013084)资助
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作者简介: 谢松云(1968-),女,西北工业大学教授、博士生导师,主要从事神经信息处理与脑认知、红外图像处理及动态目标识别与跟踪的研究。
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