Proposal of Alleviation Method of Car Sickness Caused by Working on a PC in a Driving Car

摘要

In recent years, research on automated driving has been actively conducted. It is expected that the automatic driving of cars will eliminate the need for drivers and drastically change the environment inside the cars. The driver who was needed until now will be an occupant and will be able to spend more free time in the car. In such a situation, it is expected that there will be more opportunities to work on a PC in the car and car sickness will increase. When a parson gaze at the screen in a driving car, there is a discrepancy between the signal sent from the inner ear to the brain and the signal sent from the eyeball to the brain, and the brain judges that it is "abnormal", and the autonomic nerves become unstable. And, as a result of the instability of the autonomic nerves, symptoms of car sickness such as nausea and headache appear. This study proposes a method for alleviating car sickness caused by PC work in a driving car. This is a method in which the PC user is notified in advance of the direction in which the car will turn left or right at the next intersection by voice, and the head is tilted in the turning direction. Previous studies have shown that the driver's head movement in the turning direction leads to relief of car sickness, and it can be expected that car sickness will be alleviated by PC work. In this study, in order to verify the alleviation of car sickness by prior notification of the proposed method, the following three patterns of prior notification timing are used in the verification experiment. There are three patterns: "twice notifications = before stepping on the brake for turning left or right, and before turning the steering wheel", "once notification = before turning the steering wheel", and "0 times notifications". Participants in the experiment are asked to perform PC work in a driving car in each pattern of twice notifications, once notification, and 0 times notifications. The superiority of the proposed method is shown from the evaluation results of the questionnaire, heart rate, salivary amylase activity value, and typing task.