VEHICLE-OCCUPANT FATIGUE-LEVEL ASSESSMENT METHOD, VEHICLE SEAT ASSESSMENT METHOD, AND VEHICLE SEAT ASSESSMENT DEVICE

摘要

A highly reliable vehicle-occupant fatigue-level assessment method capable of quantitatively calculating a fatigue level of a vehicle occupant sitting on a seat. A fatigue level of a vehicle occupant sitting on a seat (1) is calculated quantitatively based on the following with the occupant sitting on the seat (1): an amount of backward deflection of a lower part of a back rest portion (2) of the seat (1), a downward load applied to the front part of a sitting portion (3) of the seat (1), a backward load applied to an upper part of the back rest portion (2).