公开(公告)号：US20090314079A1

公开(公告)日：2009-12-24

申请号：US11990573

申请日：2006-06-13

申请人： Bernard Opitz ,  Ulrich Wagner ,  Axel Franke ,  Carsten Raudzis

发明人： Bernard Opitz ,  Ulrich Wagner ,  Axel Franke ,  Carsten Raudzis

IPC分类号： G01F1/692

CPC分类号： G01F1/6986 ,  G01F1/6845 ,  G01F1/692

摘要： A method for measuring an air mass flow flowing in a main flow direction, and a hot-film air mass meter by which the method is able to be realized. The method and the hot-film air mass meter are especially suitable for use in the induction tract of an internal combustion engine. The hot-film air mass meter includes a sensor chip having a chip surface across which an air mass flow is able to flow. The chip surface in turn has a measuring surface, the measuring surface including a central hot-film air mass meter circuit having at least one central heating element and at least two temperature sensors. The method is implemented so that the at least one central heating element is periodically heated using a frequency ω. With the aid of at least two temperature sensors, at least two measuring signals are detected. The measuring signals and/or at least one differential signal of the at least two measuring signals are modulated using the frequency ω.

摘要翻译： 用于测量沿主流动方向流动的空气质量流量的方法和能够实现该方法的热膜空气质量计。 该方法和热膜空气质量计特别适用于内燃机的进气道。 热膜空气质量计包括具有能够流过空气质量流的芯片表面的传感器芯片。 芯片表面依次具有测量表面，测量表面包括具有至少一个中央加热元件和至少两个温度传感器的中心热膜空气质量计电路。 该方法被实施为使得使用频率ωm周期性地加热至少一个中央加热元件。 借助于至少两个温度传感器，至少检测两个测量信号。 测量信号和/或至少两个测量信号的至少一个差分信号使用频率ω进行调制。

公开(公告)号：US07861586B2

公开(公告)日：2011-01-04

申请号：US11990573

申请日：2006-06-13

申请人： Bernard Opitz ,  Ulrich Wagner ,  Axel Franke ,  Carsten Raudzis

发明人： Bernard Opitz ,  Ulrich Wagner ,  Axel Franke ,  Carsten Raudzis

IPC分类号： G01F1/68

CPC分类号： G01F1/6986 ,  G01F1/6845 ,  G01F1/692

摘要： A method for measuring an air mass flow flowing in a main flow direction, and a hot-film air mass meter by which the method is able to be realized. The method and the hot-film air mass meter are especially suitable for use in the induction tract of an internal combustion engine. The hot-film air mass meter includes a sensor chip having a chip surface across which an air mass flow is able to flow. The chip surface in turn has a measuring surface, the measuring surface including a central hot-film air mass meter circuit having at least one central heating element and at least two temperature sensors. The method is implemented so that the at least one central heating element is periodically heated using a frequency ω. With the aid of at least two temperature sensors, at least two measuring signals are detected. The measuring signals and/or at least one differential signal of the at least two measuring signals are modulated using the frequency ω.

摘要翻译： 用于测量沿主流动方向流动的空气质量流量的方法和能够实现该方法的热膜空气质量计。 该方法和热膜空气质量计特别适用于内燃机的进气道。 热膜空气质量计包括具有能够流过空气质量流的芯片表面的传感器芯片。 芯片表面依次具有测量表面，测量表面包括具有至少一个中央加热元件和至少两个温度传感器的中心热膜空气质量计电路。 实施该方法使得使用频率ω周期性地加热至少一个中央加热元件。 借助于至少两个温度传感器，至少检测两个测量信号。 使用频率ω调制至少两个测量信号的测量信号和/或至少一个差分信号。