DENSO ADAS / AD 安心できる、自動運転

松ヶ谷和沖×島下泰久

#6Evolution of HMI

Difference between automated driving and driver assistance is the magnitude of human intervention in driving.What becomes important in this context is communication between the vehicle and the human.The vehicle system needs to tell the occupants correctly and intuitively what it is doing and to what extent it can deal with driving under ever-changing driving environment.Most traffic accidents occur when the vehicle didn’t work as the driver expected, that is to say, when a human places too much confidence in the vehicle.

In the future, the significance of Human Machine Interface (HMI) will grow further to allow humans to understand present vehicle conditions promptly and correctly.Companies are competing fiercely to develop the technology at the moment.

The most difficult part is how to realize HMI that supports Level 3 autonomy where the driver may be required to take over the driving task any time when requested by the system.Occupants can fall asleep or do whatever they want in the vehicle with highly-automated Level 4 or fully-automated Level 5 autonomy.However, in the Level 3, the system needs to maintain the driver’s alertness to the level competent for driving all the time.

Here, the joy of driving seems to be the key element. If the system can provide the driver with joy of driving, they will never get bored while in the vehicle.It is just like the driver who never becomes sleepy when they are fully enjoying the driving.The possible step after that will be standardization and specification sharing among multiple HMIs.It is very important for any car in the world to convey information in the same way so that users can safely use any automated driving vehicle anywhere on the globe.

So, HMI is thought to converge on one direction gradually.Vehicle’s basic interfaces such as steering wheels, brake pedals and accelerators can be operated in the same way all over the world.