公开(公告)号：US20040118619A1

公开(公告)日：2004-06-24

申请号：US10325538

申请日：2002-12-19

Applicant: DELPHI TECHNOLOGIES, INC.

Inventor： Charles A. Gray ,  Robert K. Constable ,  John G. West ,  James F. Patterson ,  Peter J. Schubert

IPC: G01G019/52

CPC classification number: B60R21/01516 ,  B60N2/002 ,  B60N2/0244 ,  G01G19/4146

Abstract: A vehicle seat occupant classification system uses a pressure responsive, fluid filled bladder and pressure sensor adapted for engagement with an underside of a foam seat cushion so as to generate a pressure signal corresponding to the weight of an occupant on an upper side of the foam seat cushion. A humidity sensor responds to relative humidity of air adjacent the pressure sensor and/or foam seat cushion to generate a humidity signal that is used to compensate at least one of the pressure signal, a stored reference pressure value and a stored threshold value, from which at least in part; an occupant classification is determined. The system preferably includes a time delay between the reading of a humidity value and the full use of that humidity value in compensation; and the time delay may be responsive to an activity factor derived from dynamic variations in the pressure signal associated with a pumping action on the foam tending to increase the rate of exchange of air between the foam and the atmosphere outside the foam. Preferably, the temperature adjacent the pressure sensor and/or foam seat cushion is also determined and used in conjunction with the humidity signal to provide au additional cross-correlation compensation.

Abstract translation: 汽车座椅乘员分类系统使用压力响应，流体填充的气囊和压力传感器，其适于与泡沫座垫的下侧接合，以产生对应于泡沫座椅上侧的乘员重量的压力信号 坐垫。 湿度传感器响应靠近压力传感器和/或泡沫座垫的空气的相对湿度，以产生湿度信号，该湿度信号用于补偿压力信号，存储的参考压力值和存储的阈值中的至少一个， 至少部分; 确定乘员分类。 该系统优选地包括在读取湿度值和补偿中充分使用该湿度值之间的时间延迟; 并且时间延迟可以响应于与泡沫上的泵送作用相关联的压力信号的动态变化导致的活动因素，倾向于增加在泡沫之外的泡沫和大气之间的空气的交换速率。 优选地，与压力传感器和/或泡沫座垫相邻的温度也被确定并结合湿度信号使用以提供au附加的互相关补偿。