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    • 54. 发明公开
    • THERMAL FLOW SENSOR, METHOD AND APPARATUS FOR IDENTIFYING FLUID, FLOW SENSOR, AND METHOD AND APPARATUS FOR FLOW MEASUREMENT
    • 热式流量计,方法和装置用于识别液体,流量传感器和方法及装置流量测量
    • EP1094306A1
    • 2001-04-25
    • EP00917448.3
    • 2000-04-25
    • Yazaki Corporation
    • ODA, SeijiYAMAURA, Michiaki
    • G01F1/692
    • G01N27/18G01F1/6845G01F1/6888G01F1/692G01F1/696G01F1/698G01K1/00G01N25/00G01N33/22
    • When a micro heater (4) energized by external drive current heats a fluid, an upstream thermopile (8) detects the temperature of the fluid before heated and produces a first temperature signal, while a downstream thermopile (5) detects the temperature of the fluid heated by the micro heater (4) and produces a second temperature signal. The flow rate of the fluid is calculated using the difference between the two temperature signals. A right thermopile (11) and a left thermopile (13) arranged substantially crosswise of the flow of the fluid with respect to the micro heater (4) detect the temperature of the fluid and produce a right temperature signal and a left temperature signal, respectively. The calculated flow rate is corrected by physical properties of the fluid calculated based on the right and left temperature signals. The flow rate of fluid can be accurately measured even with a flow sensor whose output is sensitive to the type and composition of a fluid to be measured.
    • 当由外部驱动电流激励的微加热器(4)加热在上游热电堆的流体(8)检测流体的温度加热之前和产生第一温度信号,而下游热电堆(5)检测流体的温度 由微加热器(4)加热,并产生一个第二温度信号。 的流体的流率是使用两个温度信号之间的差计算。 右热电堆(11)和布置成基本上横向的流体的流动相对于所述微加热器的左热电堆(13)(4)检测流体的温度并产生一个合适的温度信号和左温度信号,分别 , 计算的流速是通过基于右和左温度信号计算所述流体的物理性质进行校正。 流体的流率可以被精确地设定,即使流量传感器,其输出的类型和一个流体的组合物敏感待测量测定。