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    • 12. 发明授权
    • Method of measuring oxygen
    • 测量氧气的方法
    • US06214209B1
    • 2001-04-10
    • US08986708
    • 1997-12-08
    • Werner Gruenwald
    • Werner Gruenwald
    • G01N2741
    • G01N27/419G01N27/4071
    • An oxygen measuring sensor is proposed, having a pump cell (20) with outer and inner pump electrodes (17, 19) disposed on a solid electrolyte (11) which conducts oxygen ions, of which the inner pump electrode (17) is exposed in a diffusion conduit (15) to the gas to be measured. A further electrode (18) of a measuring cell (21) is disposed in the diffusion conduit (15) behind the inner pump electrode (17) in the direction of diffusion, at which a partial oxygen pressure, which lies at least approximately in the vicinity of lambda=1, can be set by means of the pump cell (20), so that the pump cell (20) operates outside of the limiting current range of the current/voltage characteristic curve.
    • 提出了一种氧测量传感器,其具有泵电池(20),其具有设置在内部泵电极(17)暴露于其中的氧离子的固体电解质(11)上的外泵浦电极和内泵电极(17,19) 对待测气体的扩散管道(15)。 测量单元(21)的另一个电极(18)在扩散导管(15)内沿扩散方向设置在内部泵电极(17)的后面,部分氧气压力至少位于 可以通过泵电池(20)来设定λ= 1的附近,使得泵电池(20)在电流/电压特性曲线的限制电流范围之外工作。
    • 14. 发明授权
    • Sensor element for the determination of concentration of gas
constituent(s)
    • 用于测定气体成分浓度的传感器元件
    • US5545301A
    • 1996-08-13
    • US360737
    • 1994-12-23
    • Karl-Hermann FrieseWerner GruenwaldRoland StahlClaudio de la PrietaGerhard SchneiderHarald Neumann
    • Karl-Hermann FrieseWerner GruenwaldRoland StahlClaudio de la PrietaGerhard SchneiderHarald Neumann
    • G01N27/41G01N27/407G01N27/26
    • G01N27/4071
    • A sensor element for determining concentration of at least one constituent of a gas mixture operates on an electro-chemical measuring process and includes a gas measuring chamber; a pair of electrodes and an electrode chamber located between the pair of electrodes; and a diffusion conduit adjoining the electrode chamber and having a gas input which connects with the gas measuring chamber, having a gas output which connects with the electrode chamber, and having at least one cross-sectional area including a height, w, and a length, L, which height, w, has a preselected minimum value, and which length, L, has a value which is equal to or greater than the preselected minimum value of the height, w. The constituent of the gas mixture has a mean free path length through the sensor element, the gas measuring chamber has a cross-sectional area including a height and a length each of which are at least as large as the minimum height, w, of the diffusion conduit, and the height, w, of respective ones of the at least one cross-sectional area of the diffusion conduit is at least a multiple of the mean free path length of the constituent of the gas mixture to be measured. Advantageously, substantially only gaseous phase diffusion occurs when the predetermined minimum value of the height, w, is at least a multiple of a minimum value of the mean free path length for the gas constituent measured.
    • 用于确定气体混合物的至少一种组分的浓度的传感器元件在电化学测量过程中运行,并且包括气体测量室; 位于所述一对电极之间的一对电极和电极室; 以及邻接所述电极室并具有与所述气体测量室连接的气体输入的扩散管道,具有与所述电极室连接的气体输出,并且具有包括高度w和长度的至少一个横截面区域 ,L,其高度w具有预选的最小值,并且长度L具有等于或大于预定的最小值的最小值w的值。 气体混合物的组分具有通过传感器元件的平均自由路径长度,气体测量室具有包括高度和长度的横截面积,每个高度和长度至少与最小高度w一样大, 扩散管道的扩散管道,并且扩散管道的至少一个横截面积中相应的一个的高度w至少为要测量的气体混合物的成分的平均自由程长度的倍数。 有利地,当高度的预定最小值w至少为测量的气体成分的平均自由程长度的最小值的倍数时,基本上仅发生气相扩散。