Study On The Automated Evaluation Method Of Rail Transit Driving Touch Operation

With the development of high-speed train intelligence,touch screen has been widely used in driver cabs.As an important human-computer interaction interface,touch screen will have a significant impact on driving safety and interaction efficiency.Therefore,it is necessary to carry out usability evaluation research on the operation of touch screen.In this paper,by analyzing the behavioral characteristics of the interaction between high-speed train drivers and touch screen,an automatic evaluation model of touch screen operation is constructed from two aspects of vision and operation,and the calculation method of automatic evaluation of touch screen operation is designed and realized.The effectiveness of the automatic evaluation method is verified by human factor experiments.The main work and research results are as follows:(1)The analysis of touch screen operation evaluation index for high-speed railway driving is carried out.Based on the behavioral characteristics model of interaction between driver and touch screen,cognitive task analysis and hierarchical task analysis are carried out for the driving operation of high-speed railway drivers.The indicators that can reflect the usability evaluation of touch screen interface are extracted from the perspective of accessibility and visibility,which lays a foundation for the automatic evaluation of touch screen operation in high-speed railway driving.(2)The automatic evaluation method of touch screen operation for high-speed railway driving is designed and implemented.For reachability,a touch screen operation time prediction model based on Fitz ’ s law is proposed,which reflects the relationship between touch operation and interaction distance,touch control size and interaction time.Aiming at visibility,a visual guidance probability calculation model based on aboriginality detection is proposed based on aboriginality graph model.By analyzing the color,brightness,direction and motion characteristics of each area of the touch screen,the model characterizes the guidance relationship between the target area of the touch screen and the driver ’s visual behavior.(3)The experimental study on parameter collection of operation time prediction model and validation of visibility automatic evaluation method is carried out.In terms of the parameter acquisition of the operation time prediction model,through the simulation of the position of the touch screen and the size of the operation control of the high-speed train with the automatic calculation method of the visibility index,the experimental collection of the touch time under each position and the size of the control is carried out,and then the time prediction model of the operation of the touch screen of the high-speed train is fitted and determined.In view of the visibility automatic evaluation method,the development of the experimental platform and the design of the typical fault handling tasks of high-speed trains were completed,and the accessibility and visibility variables were carried out.The human factor experiment was carried out,and the performance data including the task completion time,the first fixation time,the number of scans,the total time satisfaction,and the subjective load under different task interfaces were collected.The correlation between the calculated value of the visibility automatic evaluation model and the above performance data was analyzed,and the effectiveness of the visibility automatic evaluation method was verified.(4)Taking the DMI interface of high-speed train as the research object,the application case study of touch screen operation automatic evaluation method is completed.The case study analyzes the accessibility of the interactive process and the visibility of the interface elements of the DMI platform switch and stop accurately recognizing the interface.The analysis results show that the above interfaces have good accessibility and visibility.The automatic evaluation method of high-speed rail driving touch operation proposed in this paper can effectively evaluate the touch screen operation,and provide the design basis for the touch screen interface from the aspects of color,brightness and size of the operation control,so as to improve the usability of the touch screen interface.This study.It is of great significance to improve the efficiency and safety of high-speed train operation.