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

摘要

A highly reliable vehicle driver's fatigue evaluating method is provided, which is capable of quantitatively calculating a degree of fatigue of a driver seated on a seat. The degree of fatigue of the driver seated on a seat (1) is quantitatively calculated based on an amount of rearward deflection of a lower part of a backrest portion (2) of the seat (1), a load applied downward to a front part of a seating portion (3) of the seat (1), and a load applied rearward to an upper part of the backrest portion (2), in a state of the driver being seated on the seat (1).