Research On The Impact Of A New Full Touch Screen Human-Machine Interface Mode On Driving Performance

Full touch screen human-machine interface(HMI)has become the mainstream trend of human-machine interface in the vehicle field,which completely subverts the traditional HMI interaction methods relying on buttons and knobs.Aiming at the potential risks brought by the new full touch screen human-machine interface process to the driving process,this article designed and built two types of real road driving experimental platforms.Under the traditional interaction mode and full touch screen interaction mode,a total of 26 subjects were tested for data related to the operation of the human-vehicle system during the execution of the task.On this basis,six indicators were selected to analyze driving performance data under four vehicle speeds and two interaction modes,including total task duration,number of gaze switching,time for a single sight to leave the front,total time of sight away from the front,standard deviation of the lateral position,and standard deviation of vehicle speed.The main research contents and conclusions are as follows:(1)For air conditioning tasks,under the full touch screen interaction mode,the distribution range of the total task duration,number of gaze switching,time for a single sight to leave the front,total time of sight away from the front,standard deviation of the lateral position,and standard deviation of vehicle speed for drivers completing tasks is significantly higher than that under the physical button interaction mode,with the average values of the above parameters increasing by 34.7%,12.5%,38.7%,50.7%,37.8%,and 80.9%,respectively.Under the two interactive modes,the average of the total task duration and the total time of sight away from the front showed a uniform trend of decline with the increase of vehicle speed,while the average of the standard deviation of the lateral position increased with the increase of vehicle speed.(2)For navigation setup tasks,the total task duration,number of gaze switching,the total time of sight away from the front,and the average standard deviation of vehicle speed in full touch screen mode have increased by 79.4%,77.2%,49.1%,and 28.1%compared to traditional mode when using mobile phones for navigation,respectively.The average time for a single sight to leave the front has decreased by 15.9%compared to mobile phone navigation mode.Under the two interactive modes,the time for a single sight to leave the front and the total time of sight away from the front of the vehicle show a certain downward trend with the increase of the vehicle speed.The number of gaze switching and the standard deviation of the lateral position show a certain upward trend with the increase of the vehicle speed.The average value of the total task duration changes slightly with the increase of the vehicle speed,and remains stable as a whole.(3)For longitudinal risks,in a car following environment where the air conditioning task is operated,the number of collisions in the full touch screen and physical button interaction modes accounts for 29.5%and 4.1%of the total number of samples,respectively.At the same vehicle speed and interaction mode,as the deceleration of the vehicle in front increases,the number of rear collision accidents gradually increases.At the same deceleration of the vehicle in front,the number of rear collision accidents in the full touch screen mode decreases as the vehicle speed increases,In physical button mode,except for a deceleration of 8 m/s~2,the rest also decrease as the vehicle speed increases,but the decrease is smaller than in full touch screen mode.In the car following environment of operating the navigation sub task,the number of collisions occurring in both full touch screen and mobile phone modes is relatively large,accounting for 36.3%and 40.1%of the total number of samples,respectively.In contrast,the number of collisions occurring in mobile phone mode is slightly larger than that in full touch screen interaction mode.At the same vehicle speed and interaction mode,the number of rear collision accidents gradually increases as the deceleration of the vehicle in front increases.Under the same front vehicle deceleration and interaction mode,the number of rear-end collisions tends to decrease with the increase of vehicle speed,and the decrease is significant in both modes.