基于脈搏波的警覺(jué)度檢測(cè)研究
[Abstract]:In this paper, the variation of alertness is studied by pulse wave signal. In this study, 10 subjects were recruited to participate in a 95 min alert "clock test" (MCT). In the course of the experiment, the subjects evaluated their waking degree subjectively by the Karolinska sleepiness scale (KSS) and the Stanford somnolence scale (SSS), and recorded the target reaction time, target recognition accuracy and pulse wave signal of all the subjects. The results showed that according to subjective scale scores and behavioral data of subjects, alertness could be calibrated to three levels: the first 30 min was high alert, the middle 30 min was general alertness, and the latter 30 min was low alert. In addition, the time domain characteristics of pulse wave signal, such as the amplitude of the secondary wave peak, the latency of the secondary wave peak, decrease with the decrease of the alertness, while the amplitude of the trough increases with the decrease of the alertness. The energy probability of the four subbands of: 8.600 ~ 9.375 Hzn 11.720 ~ 12.500 Hz ~ 38.280 ~ 39.060 Hz and 39.060 ~ 39.840 Hz also decreases with the decrease of alertness. Finally, the average three-classification accuracy rate of 10 subjects was 88.7in the model established by the above eight features. The results of this paper confirm the feasibility of pulse wave in alertness evaluation and provide a new idea for real-time monitoring of alertness.
【作者單位】: 中國(guó)航天員科研訓(xùn)練中心人因工程國(guó)防科技重點(diǎn)實(shí)驗(yàn)室;
【基金】:國(guó)家自然科學(xué)基金(81671861)
【分類號(hào)】:R318
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