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    • 51. 发明授权
    • Fluid component detection method
    • 流体成分检测方法
    • US5134080A
    • 1992-07-28
    • US536165
    • 1990-06-11
    • William E. BellJohn J. McNerney
    • William E. BellJohn J. McNerney
    • C23G5/00G01N27/12G01N33/00
    • G01N33/0024C23G5/00G01N27/12G01N33/0029Y10T436/182Y10T436/184Y10T436/186Y10T436/188
    • A selected component of a fluid mixture, for example a reduced sulfur compound vapor in air, is detected by selectively adsorbing the component onto a conductive thin layer of material having a chemical affinity for such component and observing the resultant change of electrical resistivity of the layer. The sensitivity of the detector changes with accumulation of the component on the sensor. The accumulation of the component on the sensor is removed by oxidizing and evolving the component from the sensor to restore the sensor to a linear operating region. The accumulated component is preferably oxidized by reacting the component with ozone. The dynamic range of the sensor is increased by counteracting the tendency for the component to accumulate by continuously feeding back ozone to or controlling the temperature of the sensor so that the sensor operates in a linear region near null.
    • 流体混合物的选定组分,例如空气中还原的硫化合物蒸气,通过选择性地将组分吸附到对这种组分具有化学亲合力的材料的导电薄层上,并观察所得层的电阻率变化 。 检测器的灵敏度随着部件在传感器上的积累而变化。 通过从传感器氧化和演化组件来将组件的累积消除在传感器上,以将传感器恢复到线性操作区域。 优选地,通过使该组分与臭氧反应来使所累积的组分氧化。 传感器的动态范围通过连续反馈臭氧或控制传感器的温度来抵消部件累积的趋势而增加,使得传感器在接近零的线性区域中运行。