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    • 1. 发明授权
    • Measuring sensor for determining the oxygen content of gas mixtures
    • 用于测定气体混合物氧含量的测量传感器
    • US5702580A
    • 1997-12-30
    • US617873
    • 1996-03-21
    • Hermann DietzWerner GruenwaldClaudio De La PrietaGert LindemannUlrich EiseleCarmen Schmiedel
    • Hermann DietzWerner GruenwaldClaudio De La PrietaGert LindemannUlrich EiseleCarmen Schmiedel
    • G01N27/41G01N27/417G01N27/419G01N27/407
    • G01N27/417
    • A measuring sensor for determining oxygen content in a gas mixture including exhaust gases of internal combustion engines, includes a base substrate which is comprised of a base material and which is electrically insulating; and an electrochemical measuring probe and an electrochemical reference probe arranged separate from each other on the base substrate. The measuring probe includes at least one internal electrode; at least one solid electrolyte island; and at least one external electrode. The measuring probe additionally includes a diffusion barrier. Further base material layers composed of the base material are provided so as to embed at least the diffusion barrier, the at least one internal electrodes for the measuring probe and the internal electrode for the reference probe. A diffusion hole is defined between the measuring probe and the reference probe which extends from the base substrate through the diffusion barrier and respective base material layers, and out to the gas mixture to be measured. Thermal stress and the accompanying tendency to cracking is reduced by providing the solid electrolyte as islands. Separate disposition of the measuring probe and the reference probe, i.e., without a common electrode, permits construction as individual layers using, for example, screen printing.
    • PCT No.PCT / DE95 / 01305 Sec。 371日期1996年3月21日 102(e)日期1996年3月21日PCT提交1995年9月22日PCT公布。 公开号WO96 / 11394 日期1996年04月18日用于测定包括内燃机废气的气体混合物中的氧含量的测量传感器包括由基材构成并且是电绝缘的基底, 以及在基底基板上彼此分离设置的电化学测量探针和电化学参考探针。 测量探头包括至少一个内部电极; 至少一个固体电解质岛; 和至少一个外部电极。 测量探头还包括扩散阻挡层。 提供由基材构成的其他基材层,以便至少嵌入扩散阻挡层,至少一个用于测量探针的内部电极和用于参考探针的内部电极。 在测量探针和参考探针之间限定了扩散孔,该探针从基底基底通过扩散阻挡层和相应的基底层层延伸出来,并且进入待测量的气体混合物。 通过提供固体电解质作为岛来减少热应力和伴随的开裂倾向。 测量探针和参考探针的单独布置,即没有公共电极,可以使用例如丝网印刷将结构设计为单独的层。
    • 4. 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。
    • 6. 发明授权
    • Measuring sensor for determining the oxygen content of gas mixtures
    • 用于测定气体混合物氧含量的测量传感器
    • US5474665A
    • 1995-12-12
    • US306572
    • 1994-09-15
    • Karl-Hermann FrieseHermann DietzHermann FischerManfred KoederWerner GruenwaldUlrich Eisele
    • Karl-Hermann FrieseHermann DietzHermann FischerManfred KoederWerner GruenwaldUlrich Eisele
    • F02B1/04F02D41/14G01N27/409G01N27/419G01N27/407
    • G01N27/419F02B1/04
    • The invention relates to a measuring sensor having pump reference for measuring the oxygen content of gas mixtures, particularly exhaust gases of internal combustion engines. The sensor includes a measuring cell (A) and a reference cell (B) each having a pair of electrodes, with one of each respective pairs of electrodes being common to the two cells, and having a fixed electrolyte. Reference cell (B) has defined therein an internal oxygen reference zone which is hermetically sealed from the gas mixture and which is connected to the atmosphere by way of a pressure-equalization line. The measuring cell (A) and the reference cell (B) can be heated by heating apparatus to a temperature at which the fixed electrolyte has an ionic conductivity which is sufficiently high. The heating apparatus and a porous insulation are advantageously disposed in the vicinity of the electrode of the reference cell which is not in common with the measuring cell and which is porous so that the porous insulation, together with the porous electrode, form the internal oxygen reference zone and, together with the porous electrode and its porous conductor track, form the pressure-equalization line.
    • 本发明涉及一种具有用于测量气体混合物,特别是内燃机废气的氧含量的泵参考的测量传感器。 传感器包括测量单元(A)和参考单元(B),每个参考单元具有一对电极,每对电极中的每一对电极与两个单元共用,并具有固定的电解液。 参考电池(B)在其中限定了内部氧参考区,其内部氧参考区与气体混合物气密密封,并通过压力平衡线连接到大气。 测量单元(A)和参考单元(B)可以通过加热装置加热至固定电解质具有足够高的离子电导率的温度。 加热装置和多孔绝缘体有利地设置在参比单元的电极附近,其与测量池不相同,并且是多孔的,使得多孔绝缘体与多孔电极一起形成内部氧参考 并且与多孔电极及其多孔导体轨道一起形成压力平衡线。
    • 9. 发明授权
    • Electrochemical measuring sensor for determining nitrogen oxides in gas
mixtures
    • 用于测定气体混合物中氮氧化物的电化学测量传感器
    • US5879526A
    • 1999-03-09
    • US822510
    • 1997-03-24
    • Hermann DietzWerner Gruenwald
    • Hermann DietzWerner Gruenwald
    • G01N33/00G01N27/41
    • G01N33/0037
    • An electrochemical measuring sensor for selectively determining nitrogen oxides in a gas mixture including oxygen and nitrogen oxides, includes a solid electrolyte layer; a cover layer; and a diffusion channel which is defined between the solid electrolyte layer and the cover layer, and through which the gas mixture diffuses in a diffusion direction. The solid electrolyte layer has provided on a surface thereof a first cathode and a second cathode disposed one after the other in the diffusion direction of the gas mixture within the diffusion channel and exposed to the gas mixture in the order recited, and has provided on an opposite surface thereof at least one anode. The diffusion channel forms a diffusion barrier for the second cathode. The first and second cathodes and the at least one anode are gas permeable and consist of one of a precious metal or a precious metal alloy. The first cathode is provided with a coating which completely covers same, which is impermeable to nitrogen oxides (NO.sub.x), and which is permeable to oxygen. The first cathode, a portion of the solid electrolyte, and the at least one anode form a first pumping cell. The second cathode, another portion of the solid electrolyte, and the at least one anode form a second pumping cell. A measuring signal for determining NO.sub.x is measured between the second cathode of the second pumping cell and the at least one anode of the second pumping cell as a limiting current.
    • 一种用于选择性地确定包含氧和氮氧化物的气体混合物中的氮氧化物的电化学测量传感器包括固体电解质层; 覆盖层; 以及限定在固体电解质层和覆盖层之间的扩散通道,气体混合物通过该扩散通道沿扩散方向扩散。 固体电解质层在其表面上设置有在扩散通道内的气体混合物的扩散方向上一个接一个地设置的第一阴极和第二阴极,并以所述顺序暴露于气体混合物,并且 其相对表面具有至少一个阳极。 扩散通道形成第二阴极的扩散阻挡层。 第一和第二阴极和至少一个阳极是透气的,由贵金属或贵金属合金之一组成。 第一阴极设置有完全覆盖的涂层,其对于氮氧化物(NOx)是不可渗透的,并且其是透氧的。 第一阴极,固体电解质的一部分和至少一个阳极形成第一泵浦电池。 第二阴极,固体电解质的另一部分和至少一个阳极形成第二泵浦电池。 在第二泵浦电池的第二阴极和第二泵浦电池的至少一个阳极之间测量用于确定NOx的测量信号作为限制电流。