基于生理信息的视频显示终端精神疲劳状态研究  

Study on Visual Display Terminal Mental Fatigue Status Based on Physiological Information

作　　者：张爱华[1] 杨华[2] 孔令杰[1] 

机构地区：[1]兰州理工大学电气工程与信息工程学院,兰州730050 [2]兰州理工大学计算机与通信学院。兰州730050

出　　处：《生物医学工程学杂志》2011年第5期1025-1029,1034,共6页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30670529)

摘　　要：为寻找诊断与评测视频显示终端(VDT)精神疲劳状态的客观指标,设计VDT精神疲劳实验,实时采集被试者的体温信号和心电(ECG)信号。通过对被试者体温信号时域和ECG信号时域、频域的分析,提取人体温度、心率(HR)和心率变异性(HRV)作为精神疲劳的评测客观参量。被试者在精神疲劳实验后,体温显著升高(P<0.001),RR-PNN50明显升高(P<0.05),ECG信号的S波明显下降(P<0.05);自然恢复后与精神疲劳测试实验结束时相比,体温升高,RR-PNN50变化不明显,S波显著升高(P<0.01),精神疲劳程度有所缓解。实验结果表明,通过对体温信号和ECG信号的分析有望找到评测VDT精神疲劳的客观指标。A visual display terminal （VDT） mental fatigue task was designed to search for the objective indicator to diagnose and evaluate the VDT mental fatigue status. The signals of temperature and electrocardiograph （ECG） are collected from the subjects. The temperature, heart rate （HR） and heart rate variability （HRV） are extracted as the objective parameters after analyzing the temperature signals in time domain and the ECG signals in time domain and frequency domain. Compared with mental fatigue pre-experiment, the temperature increased significantly （P~ 0. 001）, and the RR-PNN50 increased obviously （P〈0. 05）, while the S wavelet of ECG signals decreased obviously （P〈0. 05） after mental fatigue experiment. Compared with the end of mental fatigue experiment, the temperature increased, the changes of RR-PNNS0 were not obvious, the S wavelet increased significantly （P〈0. 01）, and the mental fatigue was somewhat remittance after natural recovery. The results showed that the objective indicator to e- valuate the VDT mental fatigue status would be hopeful to be found out by analyzing the signals of temperature and ECG.

关 键 词：视频显示终端 精神疲劳 心率变异性 自然恢复 心电图 

分 类 号：R318.04[医药卫生—生物医学工程]