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    • 2. 发明申请
    • ACOUSTIC SPEED OF SOUND MEASUREMENT USING BANDPASS FILTERING OF AUTOMOTIVE PRESSURE SENSORS
    • 声压测量使用汽车压力传感器的BANDPASS滤波器的声速
    • US20120288780A1
    • 2012-11-15
    • US13104671
    • 2011-05-10
    • Thomas W. TIGHEDaniel C. DI FIORE
    • Thomas W. TIGHEDaniel C. DI FIORE
    • H01M8/04G01N29/02
    • H01M8/04388H01M8/04089
    • A fuel cell system that determines the concentration of hydrogen gas in an anode loop. The fuel cell system includes at least one fuel cell, an anode inlet, an anode outlet, an anode loop, a source of hydrogen gas and an injector for injecting the hydrogen gas. First and second pressure sensors are provided in the anode loop and are spaced a known distance from each other. A controller responsive to the output signals from the first and second pressure sensors filters the sensor signals from the first and second pressure sensors and determines the concentration of hydrogen gas in the anode loop based on the time difference between the filtered sensor signal from the first pressure sensor and the filtered sensor signal from the second pressure sensor.
    • 确定阳极回路中氢气浓度的燃料电池系统。 燃料电池系统包括至少一个燃料电池,阳极入口,阳极出口,阳极环,氢气源和用于注入氢气的注射器。 第一和第二压力传感器设置在阳极环中并且彼此隔开已知的距离。 响应于来自第一和第二压力传感器的输出信号的控制器对来自第一和第二压力传感器的传感器信号进行过滤,并且基于来自第一压力的经滤波的传感器信号之间的时间差确定阳极回路中的氢气浓度 传感器和来自第二压力传感器的已滤波的传感器信号。