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    • 2. 发明授权
    • Polarographic oxygen concentration sensor and method of determining
oxygen content in the exhaust gases of an internal combustion engine
    • 极谱氧浓度传感器和确定内燃机废气中的氧含量的方法
    • US4356065A
    • 1982-10-26
    • US213049
    • 1980-12-04
    • Hermann Dietz
    • Hermann Dietz
    • G01N27/41F02B1/04F02D41/14G01K7/26G01N27/407G01N27/409G01N27/413G05B23/02G01N27/58
    • G01N27/4075F02B1/04
    • A solid electrolyte is sandwiched between a measuring electrode exposed to the gas and a reference electrode exposed to a reference gas of known oxygen level, and a cover, for example in form of a layer or a cap, is applied over the measuring electrode. To linearize output from the sensor over a wide range of oxygen partial pressure in a gas so that, upon applying a voltage across the electrodes thereof, current flow will be representative of the oxygen concentration in the gas, the cover consists of a material having a predetermined diffusion resistance to oxygen while essentially inhibiting convection of gases to the electrode and limiting the quantity of oxygen reaching the measuring electrode to that value at which any oxygen molecules reaching the measuring electrode will be immediately converted by electrode reaction, thus inhibiting current flow through the sensor due to diffusion of gases and preventing that the current through the sensor will be determined by the activating energy of the charge penetration through the phase separation at the electrode surface.
    • 将固体电解质夹在暴露于气体的测量电极和暴露于已知氧含量的参考气体的参比电极之间,并将覆盖物例如层或盖的形式施加到测量电极上。 为了在气体中的宽范围的氧分压线性化传感器的输出,使得当在其电极上施加电压时,电流将代表气体中的氧浓度,盖由具有 预定的对氧气的扩散阻力,同时基本上抑制气体对电极的对流,并将到达测量电极的氧气量限制在达到测量电极的任何氧分子将被电极反应立即转换的值,从而抑制电流流经 传感器由于气体的扩散并且阻止通过传感器的电流将由通过电极表面处的相分离的电荷穿透的活化能确定。
    • 3. 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。
    • 5. 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。
    • 7. 发明授权
    • Gas sensor construction, particularly to determine oxygen content
combustion exhaust gases, particularly from internal combustion engines
    • 气体传感器结构,特别是确定氧含量燃烧废气,特别是内燃机
    • US4305803A
    • 1981-12-15
    • US184085
    • 1980-09-04
    • Barbara BeyerHermann DietzKarl Friese
    • Barbara BeyerHermann DietzKarl Friese
    • G01N27/41G01N27/407G01N27/413G01N27/48G01N27/58
    • G01N27/4071
    • To facilitate manufacture of a sensor, particularly a polarographic sensor which has no sealing or heat expansion difficulties and only low heat capacity in the measuring range and electrical connections, a solid electrolyte (17) is formed as a plate extending transversely across a bottom opening (13) of a preferably ceramic tube (11), the plate having two electrodes (16,21) applied to its major sides. The side facing the opening (13) is covered with a ceramic layer (20) having a predetermined diffusion or migration resistance to oxygen molecules. The electrical connections are formed by a conductive track (15) extending on the inside of the ceramic tube, in contact with the sensing electrode on one side of the plate; and a counter head (23) connected to a conductive bolt or pin (24) and resiliently spring pressed against the electrode, and holding the plate (17) and the diffusion barrier (20) thereon in position in the sensor. The test gas is applied to the diffusion resistance layer through a ceramic heat storage plate, for instance, having openings therethrough, which has a film-type heater applied thereto, connected to a current source by conductive tracks (31, 31'; 32, 32') positioned on the outside of the ceramic tube.
    • 为了便于制造传感器,特别是在测量范围和电气连接中没有密封或热膨胀困难并且仅具有低热容量的极谱传感器,固体电解质(17)形成为横向延伸穿过底部开口的板( 13),该板具有应用于其主要侧面的两个电极(16,21)。 面向开口(13)的一侧被对氧分子具有预定的扩散或迁移阻力的陶瓷层(20)覆盖。 电连接由导电轨道(15)形成,导电轨道(15)在陶瓷管的内侧延伸,与板的一侧的感测电极接触; 以及连接到导电螺栓或销(24)并且弹性弹簧压靠在电极上并将板(17)和扩散壁(20)保持在传感器中的适当位置的相对头(23)。 测试气体通过陶瓷储热板(例如具有开口的陶瓷储热板)施加到扩散阻力层,该陶瓷储能板具有施加到其上的膜型加热器,通过导电轨道(31,31'; 32, 32')位于陶瓷管的外侧。
    • 8. 发明授权
    • Sensor element for limiting current sensors to determine the lambda
value of gas mixtures
    • 用于限制电流传感器以确定气体混合物的λ值的传感器元件
    • US5310472A
    • 1994-05-10
    • US700141
    • 1991-05-16
    • Hermann DietzWerner GrunwaldClaudio de la Prieta
    • Hermann DietzWerner GrunwaldClaudio de la Prieta
    • G01N27/41F02D41/14G01N27/406G01N27/407G01N27/416G01N27/419
    • G01N27/4071G01N27/4072
    • Sensor element for limiting current sensors to determine the lambda value of gas mixtures, in particular of exhaust gases of internal combustion engines, having inner and outer pump electrodes disposed on a ceramic substrate, the inner pump electrode of which is accessible for the measurement gas supplied through a diffusion layer acting as a diffusion barrier; having a gas-tight cover layer above the diffusion layer and having conductor tracks for the pump electrodes is described, in which the diffusion layer is adjustable, to calibrate the sensor element. This adjustability is advantageously attained by embodying the side of the diffusion layer 5 oriented toward the measurement gas inlet opening as a zigzag-shaped adjustment zone 8, from which parts can be separated mechanically or by laser cuts. The invention makes comparatively simple calibration of sensor elements possible.
    • PCT No.PCT / DE89 / 00731 Sec。 371日期1991年5月16日 102(e)日期1991年5月16日PCT提交1989年11月17日PCT公布。 公开号WO90 / 06506 日期1990年6月14日。用于限制电流传感器以确定气体混合物,特别是内燃机废气的λ值的传感器元件,其具有设置在陶瓷基板上的内部和外部泵电极,其内部泵浦电极 可用于通过作为扩散阻挡层的扩散层供应的测量气体; 描述了在扩散层上方具有气密性覆盖层并且具有用于泵电极的导体轨迹,其中扩散层是可调节的,以校准传感器元件。 有利地通过将扩散层5的朝向测量气体入口开口的侧面作为锯齿形调整区8来实现,这可以通过机械方式或通过激光切割来分离这些部分。 本发明使得传感器元件的相对简单的校准成为可能。
    • 9. 发明授权
    • Electrochemical sensor structure to determine oxygen content in
combustion exhaust gases
    • 电化学传感器结构来确定燃烧废气中的氧含量
    • US4283261A
    • 1981-08-11
    • US100256
    • 1979-12-04
    • Helmut MaurerKlaus MullerFranz RiegerErnst LinderHermann DietzKarl-Hermann FrieseBodo Ziegler
    • Helmut MaurerKlaus MullerFranz RiegerErnst LinderHermann DietzKarl-Hermann FrieseBodo Ziegler
    • G01N27/407G01N27/416G01N27/46
    • G01N27/4071
    • To measure partial oxygen pressure in gases, particularly exhaust gases of automotive-type combustion engines, a solid electrolyte plate of elongated rectangular configuration has at least one electrode pair applied to a single surface thereof, which is exposed to the measuring gas. Preferably, the gap between electrodes is elongated, by forming the electrodes in comb-interdigited form. A thermocouple - temperature sensor can be applied between connecting tracks for the electrodes which extend longitudinally of the electrolyte plate towards the other end thereof, through a sealing mass holding the plate within a housing, the other end forming, simultaneously, a connection terminal for connection to an electric connector or plug. A heating element can be placed on the obverse side of the plate, preferably in the position in the gap between the electrodes. More than one such sensor element may be secured in the same housing, and, for example, two such plates, back to back, with the heating element therebetween, spaced from each other, or as a common block. The sensor may be used for potentiometric and/or polarographic measurement, depending upon cover coatings on the electrodes which control exposure thereof to the gases, catalytic or non-catalytic action of the electrodes (for example being of platinum or gold, respectively) and whether a voltage is applied across the electrode terminals, or the sensor is to operate as an electrochemical cell. Such sensor can be inexpensively made, are suitable for mass production, and flexible with respect to their mode of operation.
    • 为了测量气体,特别是汽车型内燃机的废气中的部分氧气压力,细长矩形结构的固体电解质板具有至少一个电极对,其被施加到暴露于测量气体的单个表面。 优选地,通过以梳形交错形式形成电极,电极之间的间隙是细长的。 热电偶 - 温度传感器可以被施加在电极的连接轨道之间,电极的连接轨道通过将板保持在壳体内的密封块向另一端延伸,另一端同时形成用于连接的连接端子 电连接器或插头。 加热元件可以放置在板的正面上,优选地位于电极之间的间隙中的位置。 多个这样的传感器元件可以固定在相同的壳体中,并且例如两个这样的板,背对背,加热元件在它们之间,彼此间隔开,或者作为公共块。 传感器可以用于电位和/或极谱测量,这取决于电极上的覆盖物涂层,其控制其暴露于气体,电极的催化或非催化作用(例如分别为铂或金),以及是否 在电极端子上施加电压,或者传感器用作电化学电池。 这种传感器可以廉价地制造,适合于批量生产,并且相对于它们的操作模式是灵活的。