Patent ID: 8788151

Claim:
A method of identifying a passenger sitting on a seat of a vehicle, comprising: sensing, by a weight sensor, a weight of the passenger in the seat; measuring, by a weight-keeping-exerted time measurer, a weight continuance time which measures a duration of the sensed passenger's weight being exerted; setting, by a passenger identification unit, a class of the seat by using the weight of the passenger sensed by the weight sensor and the weight continuance time; sensing, by a seat belt-fastening sensor, whether a seat belt in the vehicle is fastened after said setting the class; changing, by the passenger identification unit, a critical value that is a reference for setting the class when the seat belt-fastening sensor senses that the seat belt is fastened; after said changing a critical value, measuring, by a door-keeping-closed time measurer, a door closing continuance time which measures the duration of a door being closed; measuring, by a seat belt-keeping-fastened time measurer, a fastened time that the seat belt has been fastened when the door closing continuance time measured by the door-keeping-closed time measurer is greater than a reference closing continuance time; initially fixing the set class by the passenger identification unit, when the fastened time measured by the seat belt-keeping-fastened time measurer is greater than a reference fastening time; after said initially fixing the set class, sensing a traveling speed of the vehicle by a vehicle speed sensor; and finally fixing the set class by the passenger identification unit when the traveling speed of the vehicle is greater than a fixed reference speed, wherein, said step of setting the class of the seat is restarted when the door closing continuance time is less than the reference closing continuance time, and said step of setting the class of the seat is restarted when the fastened time is less than the reference fastening time.