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    • 10. 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
    • US4777820A
    • 1988-10-18
    • US107446
    • 1987-10-13
    • Hans HechtWolfgang KienzleJosef KleinhansUlrich KuhnBerthold Wocher
    • Hans HechtWolfgang KienzleJosef KleinhansUlrich KuhnBerthold Wocher
    • G01P5/12G01F1/48G01F1/68G01F1/692G01F1/698
    • G01F1/692G01F1/698
    • An apparatus for determining the flow rate of a flowing medium having a substrate as a carrier and a resistor arrangement disposed on the substrate which among other elements includes a layer-like measuring resistor (R.sub.H) as well as a likewise layer-like heating resistor (R.sub.S), the heating output of which is regulated such that the measuring resistor (R.sub.H) has a constant temperature, the heating output of the heating resistor (R.sub.S) being a standard for the flow rate of the flowing medium. The surface area of (R.sub.S) is greater than the surface area of (R.sub.H) and extends farther toward a fastening of the substrate, in order to prevent a flow of heat out of the vicinity of the measuring resistor (R.sub.H). The measuring resistor (R.sub.H) and the heating resistor (R.sub.S) are located on the downstream portion of the substrate, on a lip set off by a slit. With this disposition of the measuring resistor (R.sub.H), soiling of the substrate affects the measurement result only slightly.
    • 一种用于确定具有基板作为载体的流动介质和布置在基板上的电阻器布置的流量的装置,其中包括层状测量电阻器(RH)以及同样层状的加热电阻器( RS),其加热输出被调节为使得测量电阻器(RH)具有恒定温度,加热电阻器(RS)的加热输出是流动介质的流量的标准。 (RS)的表面积大于(RH)的表面积,并且朝向基板的紧固延伸更远,以防止热量流出测量电阻器(RH)附近。 测量电阻器(RH)和加热电阻器(RS)位于基板的下游部分,在由狭缝引出的唇缘上。 通过测量电阻(RH)的这种布置,衬底的污染仅稍微影响测量结果。