nhtsa meaning in English

国家高速公路交通安全署

Perclos is the percentage of eyelid closure over the pupil over time and reflects slow eyelid closures ( " droops " ) rather than blinks . fwha and nhtsa consider perclos to be among the most promising known real - time measures of alertness for in - vehicle drowsiness - detection systems . . in order to detecting and evaluating driver fatigue , the definition of motor driver fatigue must be given
重点研究了眼睛及其疲劳机理，借鉴美国联邦公路管理局fhwa ( federalhighwayadministration )有关研究驾驶疲劳方面的研究文献，讨论了perclos和其他眼睛活动测量方法的有效性，确认测量机动车驾驶疲劳最好的方法是perclos (单位时间内眼睛闭合时间所占的百分率) 。