公开(公告)号：US20110221459A1

公开(公告)日：2011-09-15

申请号：US13042753

申请日：2011-03-08

申请人： Hideki UNO ,  Junko SHIMA ,  Yasuhiro ISHIGURO

发明人： Hideki UNO ,  Junko SHIMA ,  Yasuhiro ISHIGURO

IPC分类号： G01R27/08

CPC分类号： B60N2/002 ,  B60R21/01532

摘要： An occupant detection system includes a detection electrode provided in a vehicle seat, a phase difference measuring unit, a direct current measuring unit, and a detecting unit that detects an occupant. The phase difference measuring unit supplies a reference signal comprising a sinusoidal wave to the detection electrode via a resistive element, detects the potential of the detection electrode as an electrode signal, and measures a phase lag time of the electrode signal relative to the reference signal. The direct current measuring unit applies a steady DC voltage to the detection electrode via a resistive element, detects the potential of the detection electrode, and measures time it takes from start of application of the DC voltage to the time when the detection electrode reaches a given potential, as a charge time. The detecting unit detects an occupant based on the phase lag time and the charge time.

摘要翻译： 乘员检测系统包括设置在车辆座椅中的检测电极，相位差测量单元，直流测量单元和检测乘员的检测单元。 相位差测量单元经由电阻元件向检测电极提供包括正弦波的参考信号，检测检测电极的电位作为电极信号，并测量电极信号相对于参考信号的相位滞后时间。 直流测量单元通过电阻元件向检测电极施加稳定的直流电压，检测检测电极的电位，并测量从开始施加直流电压到检测电极到达给定时间所需的时间 潜力，充电时间。 检测单元基于相位滞后时间和充电时间检测乘员。