승객머리 위치감지 시트 헤드레스트 개발

It is the essential technique to detect the position of passenger head before rear collision for minimizing the passenger neck injury. This research introduces the technique of measuring distance between the head and headrest using the electrostatic capacity sensor in the headrest. According to the sensor material, the detecting performance of sensor was investigated. And the reliability was also tested with the new developed test-bench. On the other hand, the new mechanism is applied to the pre-crash headrest for moving the headrest front-upward. When the distance between the head rest and passenger head is measured accurately, pre-crash headrest could be adjusted to most proper position for Whiplash protection. New developed headrests can access passenger heads close to 10㎜ within 0.8 second.