Studies Of Driver's Physiological Loads Based On HRV

With the development of transportation in China, road traffic accidents happen more and more frequently, they severely impair people's lives and industry. Driving fatigue (DF) is one of the main causes of accidents, it leads to 10% of them. So, study on generation of DF and how to abate it is significant to the reducing of traffic accidents.Based on ergonomics theory, diver behavior and DF generative process is analyzed. An evaluation method for DF based on physiological signals is generalized and developed. Heart Rate Variability (HRV) is taken as an example to explore its influence on DF, and the way for reducing fatigue is searched.The perception, estimation, action process of driving would bring certain load to driver and DF generates, based on this, an ergonomics model of DF generative process is created, the influencing factors of DF are analyzed and classified according to their effect, The relation between DF and physiological signals is analyzed, an evaluation method for DF based on physiological signals is generalized and developed.The research method of this dissertation is: new methods are applied on driver body's HRV for measuring heart loads, for developing reflect the influence on human nerve system caused by environmental change. For the first time, the influence regulations of HRV caused by the whole time region of driving are acquired through this method.The results of the research provide the first-hand data about DF and it also supplies a more objective reference and method of DF study. It is significant to the reducing of DF.