Research On The Convenient Detection Method Of The Longdistance Bus Drivers’ Fatigue State Before Driving

The long-distance bus drivers are a high-risk group of fatigue driving,on account of a long time continuous driving,and they bear more passenger transport task.The safe driving can ensure the personal and property safety of the people.At present,the main policy adopted by countries to relieve driving fatigue is to control the driving time.However,a wide range of time constraints cannot eliminate the root causes of the driver fatigue.Although there are many researches on driving fatigue,it is lack of reference value for practical application of the highway passenger transportation company.One of the objectives of the current research is to determine whether it is suitable to perform the driving task by measuring the original fatigue status of the long-distance bus drivers before driving.Another goal of the present study is to provide a way to reduce the bus accidents caused by fatigue driving,effectively avoid the operation risk of the highway passenger transportation company,and improve the safety of driving.On the basis of fatigue theory,the fatigue state of drivers and other fatigue states are distinguished.And the causes and influencing factors of the fatigue state of the long-distance bus drivers are discussed.Combining the performance of the drivers’ fatigue state with the particularity of the long-distance bus drivers,this paper selects the convenient detection methods for the bus drivers before driving,from physiological testing,psychological testing,driving performance testing,external characteristics testing and subjective evaluation.The driver’s fatigue state is divided into two categories,which can perform driving tasks and do not recommend driving tasks,and correspond to different fatigue levels.And the selfrating scale of the drivers is modified in detail,and the appraisal table of drivers’ external characteristics change is established.The index system of the above two methods was established,according to the degree of correlation with the fatigue state,giving different indicators of different scores.Different grades of fatigue state are determined by threshold division.The drivers’ fatigue state evaluation factor is proposed,and the fatigue state is quantified.This paper got the index by the drivers’ perception,reaction and judgment ability through the psychological reaction testing instrument,and got the relevant feature parameters through the processing of the input speech signal,extraction and calculation.And the relationship between the psychological index and the evaluation factors,and the relationship between the speech signal index and the evaluation factors were established.In this paper,the verification experiment of convenient detection method is designed.Taking the power spectral characteristic values of the alpha,theta and the beta waves of EEG,and the ratio of the characteristic values was used as the validation index.The 15 drivers were tested by the method of four kinds of convenience detection test and one kind of verification test.Comparing the four kinds of convenient detection methods with EEG detection method,the detection accuracy rate of four convenient detection methods is obtained.According to the practical application possibility,the detection methods are combined with each other.The conclusion is that there are two kinds of optimal combination methods,such as "Problem test & Observation determination & Speech signal detection" and "Problem test & Psychological response test",and then provided suggestions for the scientific management of the highway passenger transportation company.