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    • 2. 发明申请
    • PSEUDO-CONTINUOUS PROCESS FOR THE INTERROGATION OF AN OXIDIZABLE GAS DETECTOR
    • 可氧化气体检测器的串联连续过程
    • WO1990012313A1
    • 1990-10-18
    • PCT/FR1990000242
    • 1990-04-05
    • CHARBONNAGES DE FRANCEACCORSI, AntoinetteWATTIER, AndréeKAZMIERCZAK, Marc
    • CHARBONNAGES DE FRANCE
    • G01N27/14
    • G01N27/16
    • To measure the content, in a gaseous medium, of a combustible gas whose nature is known, a resistance-type element either with a catalytic surface or which is sensitive to variations in concentration of said gas in said medium is heated electrically; the value of a quantity representative of the concentration of said gas is detected, and, according to a conversion law established beforehand by calibration, a measurement for said conversion is deduced. Said element is heated in a cyclic manner, in cycles consisting of a heating phase, a second phase during which the intensity (I) is adjusted to maintain the resistive element at a set temperature and the stabilised value of the voltage (U) at the terminals of said detector is measured, and a third phase during which the heating power is reduced. On average, the electric current flowing during the second phase is appreciably lower than the heating current.
    • 为了测量在气态介质中具有已知性质的可燃气体的含量,具有催化表面或对所述介质中所述气体的浓度变化敏感的电阻型元件被电加热; 检测代表所述气体浓度的量的值,并且根据通过校准预先建立的转换规律,推导出所述转换的测量。 所述元件以循环方式加热,循环由加热阶段,第二阶段加热,其中调节强度(I)以将电阻元件保持在设定温度,并且稳定的电压(U)在 测量所述检测器的端子,以及减少加热功率的第三相。 平均而言,在第二相期间流动的电流明显低于加热电流。