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    • 1. 发明授权
    • Apparatus for determining the flow rate of a flowing medium
    • 用于确定流动介质的流量的装置
    • US4803875A
    • 1989-02-14
    • US107149
    • 1987-10-13
    • Ulrich KuhnSybille Stumpf
    • Ulrich KuhnSybille Stumpf
    • G01P5/12G01F1/68G01F1/692
    • G01F1/692
    • An apparatus for determining the flow rate of a flowing medium having a substrate fastened at one end with a resistor arrangement disposed on the substrate which includes a layer-like measuring resistor (R.sub.S) and a layer-like heating resistor (R.sub.H). The heating output is regulated such that the measuring resistor (R.sub.S) has a constant electrical resistance, representing a flow rate of the flowing medium. By suitable provisions, such as a meandering pattern for the heating resistor (R.sub.H), the local resistance of the heating resistor (R.sub.H) crosswise to the flow direction is made to decrease toward the fastened end. Thus, the temperature generated by means of the heating resistor (R.sub.H) inside the substrate and the measuring resistor (R.sub.S) decreases toward the fastened end.
    • 一种用于确定流动介质的流量的装置,其具有在一端固定的基板,该基板设置在包括层状测量电阻器(RS)和层状加热电阻器(RH)的基板上。 加热输出被调节,使得测量电阻(RS)具有恒定的电阻,表示流动介质的流速。 通过适当的规定,例如加热电阻器(RH)的曲折图案,使得与流动方向交叉的加热电阻器(RH)的局部电阻朝向紧固端减小。 因此,通过衬底内部的加热电阻器(RH)产生的温度和测量电阻器(RS)朝向紧固端部减小。