자동차 안전벨트의 긴급 잠금식 릴 장치의 표준 기울기 및 가속도 성능 평가

This paper proposes an emergency locking unit for seat belt retractor which is mounted on the back frame of vehicle seat. The proposed unit uses recliner sensor which is based on MEMS acceleration sensor and solenoid mechanism. The seat has an upper frame supported to tilt on a lower frame. The retractor in belt in seat (HIS) system is supported on the upper frame. The proposed recliner sensor based on MEMS acceleration sensor comprises orientation means for maintaining a predetermined orientation of emergency relative to the lower frame independently of the force of gravity when the upper frame tilts on the lower frame. Experimental results show that the developed recliner sensor unit operates effectively with respect to rollover angles. Thus, the developed unit will have a considerable potential for offering new design concept in SIS system.