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20 条记录 (耗时 0.018 秒)

    Hydrogen gas sensor
    1.
    发明公开
    Hydrogen gas sensor 有权
    氢气传感器

    公开(公告)号：EP1103807A3

    公开(公告)日：2004-07-21

    申请号：EP00310212.6

    申请日：2000-11-17

    申请人： NGK SPARK PLUG CO., LTD

    发明人： Nadanami, Norihiko ,  Ishida, Noboru ,  Oshima, Takafumi ,  Inoue, Ryuji ,  Kondo, Tomonori

    IPC分类号： G01N27/407 ,  G01N27/49

    CPC分类号： G01N27/4074 ,  G01N33/005

    摘要： In a hydrogen gas sensor, the flow sectional area of a diffusion-rate limiting portion 6 is rendered small; the electrode surfaces of first and second electrodes 3 and 4 are rendered large; and/or a solution containing a polymer electrolyte identical with that of a proton-conductive layer 2 is applied onto the surfaces of the first and second electrodes 3 and 4 to thereby form a layer containing the polymer electrolyte. Thus, the rate of conduction of protons from the first electrode 3 to the second electrode 4 becomes greater than the rate at which protons are derived from hydrogen gas which is introduced onto the first electrode 3 via the diffusion-rate limiting portion 6. A hydrogen gas sensor capable of accurately measuring a hydrogen gas concentration of a measurement gas atmosphere in the presence of a variety of interfering gasses such as H 2 O and CO is thereby provided.

    Gas sensor
    3.
    发明公开
    Gas sensor 审中-公开
    气体传感器

    公开(公告)号：EP0987547A2

    公开(公告)日：2000-03-22

    申请号：EP99118554.7

    申请日：1999-09-20

    申请人： NGK SPARK PLUG CO., LTD

    发明人： Sugaya, Satoshi ,  Nadanami, Norihiko ,  Ishida, Noboru ,  Oshima, Takafumi ,  Yamada, Tetsuo

    IPC分类号： G01N27/417

    CPC分类号： G01N27/417 ,  G01N27/419

    摘要： A gas sensor comprises a first pump cell 6 including first internal and external electrodes 10 and 11 so formed as to face from inside and outside a first flow passage 2, respectively, for pumping oxygen out from, and into, the first flow passage, and a second pump cell 8 including second internal and external electrodes 14 and 15 so formed as to face from inside and outside a second flow passage 4 communicating with the first flow passage through a diffusion resistance, wherein a measurement gas component undergoes reaction inside the second flow passage 4 and a current corresponding to the concentration of the measurement gas component flows between the electrodes 14 and 15 through the oxygen ion conductor. At least a part of the first internal electrode 10 contains a platinum group element and Cu.

    摘要翻译： 气体传感器包括第一泵单元6，第一泵单元6包括第一内部电极10和第一外部电极11，第一内部电极10和第一外部电极11被形成为分别从第一流动通道2的内部和外部面对，用于将氧气从第一流动通道泵出并进入第一流动通道; 第二泵单元8，其包括第二内部电极14和外部电极15，第二内部电极14和外部电极15被形成为从第二流动通道4的内部和外部面对，第二流动通道4通过扩散阻力与第一流动通道连通，其中测量气体成分在第二流动内部 通道4中，并且与测量气体成分的浓度相对应的电流通过氧离子导体在电极14和15之间流动。 第一内部电极10的至少一部分含有铂族元素和Cu。

    Method and sensor for measuring NOx concentration
    6.
    发明公开
    Method and sensor for measuring NOx concentration 有权
    用于测量的NOx的浓度的方法和传感器

    公开(公告)号：EP0930501A3

    公开(公告)日：2002-04-24

    申请号：EP99101007.5

    申请日：1999-01-18

    申请人： NGK Spark Plug Co. Ltd.

    发明人： Yamada, Tessho ,  Ishida, Noboru ,  Matsuura, Toshitaka ,  Noda, Yoshiro ,  Hayakawa, Nobuhiro ,  Nadanami, Norihiko ,  Sugaya, Satoshi ,  Otsuka, Takaki ,  Ando, Masashi ,  Oshima, Takafumi

    IPC分类号： G01N27/417 ,  G01N27/419

    CPC分类号： G01N27/417

    摘要： The invention relates to an apparatus and a method using a two-serial space sensor (having first and second internal spaces (2, 3)) for accurately measuring NOx concentration in gas, e.g., exhausted from an internal combustion engine. Both NOx (nitrogen oxide) and oxygen are forced to be partially dissociated in the first space (2) to an oxygen concentration level of 2 x 10 -7 to 2 x 10 -10 atm by pumping out oxygen from the first space (2). The NOx concentration is determined based on the second current measured in the second space (4) and based on the NO dissociation percentage in the first space (2) which is 0.5-50%, or preferably 2-20%. The NOx measurement accuracy is further improved when the above oxygen concentration level is maintained from 2 x 10 -8 to 2 x 10 -9 and the temperature drift of the sensor is maintained within ± 5°C under a sensor temperature range of 700-900 °C.

    Method and apparatus for measuring NOx gas concentration
    7.
    发明公开
    Method and apparatus for measuring NOx gas concentration 失效
    的方法和装置的氮氧化物的测量

    公开(公告)号：EP0845670A3

    公开(公告)日：1998-10-07

    申请号：EP97121139.6

    申请日：1997-12-02

    申请人： NGK SPARK PLUG CO., LTD

    发明人： Ando, Masashi ,  Ishida, Noboru ,  Sugaya, Satoshi ,  Oshima, Takafumi ,  Nadanami, Norihiko ,  Otsuka, Takaki ,  Sato, Yoshikuni ,  Okumura, Tatuo

    IPC分类号： G01N27/407

    CPC分类号： G01N27/4074 ,  Y10T436/179228

    摘要： This discloses a method and apparatus for accurately determining a NOx concentration of a measurement gas that contains H 2 O and /or CO 2, without being affected by a dissociation of H 2 O and /or CO 2.
    In this method and apparatus,
    (1) the NOx-measurement gas containing H 2 O and/or CO 2 is introduced to travel through a heated flow channel formed by an oxygen ion conductive solid ceramic electrolyte body that electrically controls amount of O 2 from the flow channel, (2) while said measurement gas travels, a residual gas including NO and H 2 O and/or CO 2 is formed from the measurement gas, (3) said residual gas is flowed to contact a catalytic electrode to which a negative polarity of a low voltage that does not dissociate H 2 O and /Or CO 2 but dissociates NO is applied, so that said electrode dissociates a NO gas of the residual gas into N ions and O ions and flows an electric current through the electrolyte body in proportion to an amount of the O ions dissociated from said residual gas at the electrode, and (4) the NOx concentration in the measurement gas is determined based on the current. The low voltage preferably applied in the above (3)is about 350-450 mV.

    Hydrogen gas sensor
    10.
    发明公开
    Hydrogen gas sensor 有权
    Wasserstoffgassensor

    公开(公告)号：EP1103807A2

    公开(公告)日：2001-05-30

    申请号：EP00310212.6

    申请日：2000-11-17

    申请人： NGK SPARK PLUG CO., LTD

    发明人： Nadanami, Norihiko ,  Ishida, Noboru ,  Oshima, Takafumi ,  Inoue, Ryuji ,  Kondo, Tomonori

    IPC分类号： G01N27/407 ,  G01N27/49

    CPC分类号： G01N27/4074 ,  G01N33/005

    摘要： In a hydrogen gas sensor, the flow sectional area of a diffusion-rate limiting portion 6 is rendered small; the electrode surfaces of first and second electrodes 3 and 4 are rendered large; and/or a solution containing a polymer electrolyte identical with that of a proton-conductive layer 2 is applied onto the surfaces of the first and second electrodes 3 and 4 to thereby form a layer containing the polymer electrolyte. Thus, the rate of conduction of protons from the first electrode 3 to the second electrode 4 becomes greater than the rate at which protons are derived from hydrogen gas which is introduced onto the first electrode 3 via the diffusion-rate limiting portion 6. A hydrogen gas sensor capable of accurately measuring a hydrogen gas concentration of a measurement gas atmosphere in the presence of a variety of interfering gasses such as H 2 O and CO is thereby provided.

    摘要翻译： 在氢气传感器中，扩散限制部6的流动截面积变小; 第一和第二电极3和4的电极表面变大; 和/或含有与质子传导层2的聚合物电解质相同的聚合物电解质的溶液施加到第一和第二电极3和4的表面上，从而形成含有聚合物电解质的层。 因此，质子从第一电极3到第二电极4的传导速率变得比通过扩散速率限制部分6引入到第一电极3上的氢气导出质子的速率大。氢 因此，能够在存在各种干扰气体如H 2 O和CO的情况下精确测量测量气体气氛中的氢气浓度的气体传感器。