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    • 2. 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。
    • 9. 发明授权
    • Resistance probe for determining gas compositions and method of
producing it
    • 用于确定气体成分的电阻探针及其制备方法
    • US5334350A
    • 1994-08-02
    • US861810
    • 1992-06-19
    • Karl-Hermann FrieseWerner GruenwaldHans-Martin WiedenmannGerhard Hoetzel
    • Karl-Hermann FrieseWerner GruenwaldHans-Martin WiedenmannGerhard Hoetzel
    • G01N27/12G01N33/00G01N27/04H01C1/02H01C7/00
    • G01N27/12
    • A resistance probe is proposed for detecting gas compositions, particularly in the exhaust gases of internal combustion engines. This resistance probe has the advantage over prior art resistance probes that, with a short response time, it is considerably more aging resistant. This is accomplished in that the resistance layer configured as a semiconductor layer is introduced or sintered into recesses or slits provided for this purpose in the prefabricated sensor carrier body and above it is applied a porous, electrically non-conductive engobe or a protective layer structure in the form of a grid or raster. These measures enable the measuring gas to gain access to the semiconductor layer, but the semiconductor layer is simultaneously protected against corrosive, erosive and/or cavitative attacks from the exhaust gas.
    • PCT No.PCT / DE90 / 00909 Sec。 371日期:1992年6月19日 102(e)日期1992年6月19日PCT提交1990年11月24日PCT公布。 出版物WO91 / 09301 日期:1991年6月27日。提出了用于检测气体组成的电阻探针,特别是在内燃机的废气中。 该电阻探针具有优于现有技术的电阻探针的优点,其具有较短的响应时间,其耐老化性更强。 这是通过将构造为半导体层的电阻层引入或烧结到预制传感器载体本体中为此而设置的凹部或狭缝中,并且在其上施加多孔,非导电性或者保护层结构 网格或栅格的形式。 这些措施使得测量气体能够进入半导体层,但同时保护半导体层免受来自废气的腐蚀性,侵蚀性和/或空穴化攻击。