利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

97 条记录 (耗时 0.031 秒)

    Method for measuring NOx concentration and NOx concentration sensor
    1.
    发明授权
    Method for measuring NOx concentration and NOx concentration sensor 有权
    NOx浓度和NOx浓度传感器的测量方法

    公开(公告)号：US06344134B1

    公开(公告)日：2002-02-05

    申请号：US09232001

    申请日：1999-01-15

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

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

    IPC分类号： G01N27407

    CPC分类号： G01N27/417

    摘要： An apparatus and 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 2×10−7 to 2×10−10 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 chamber 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 2×10−8 to 2×10−9 and the temperature drift of the sensor is maintained within ±5° C. under a sensor temperature range of 700-900° C.

    摘要翻译： 一种使用两串联空间传感器（具有第一和第二内部空间2,3）的装置和方法，用于精确测量例如从内燃机排出的气体中的NOx浓度。 通过从第一空间2中抽出氧，迫使NOx（氮氧化物）和氧在第一空间2中部分地离解为2x10-7至2×10-10大气压的氧浓度水平。基于 在第二空间4中测量的第二电流，并且基于第一室中的NO解离百分比为0.5-50％，或优选2-20％。 在700-900℃的传感器温度范围内，当上述氧气浓度水平保持在2×10 -8至2×10 -9，并且传感器的温度漂移保持在±5℃以内时，NOx测量精度进一步提高。

    Method and apparatus for measuring NOx gas concentration
    4.
    发明授权
    Method and apparatus for measuring NOx gas concentration 有权
    测量NOx气体浓度的方法和装置

    公开(公告)号：US06695964B1

    公开(公告)日：2004-02-24

    申请号：US09588504

    申请日：2000-06-07

    申请人： Masashi Ando ,  Noboru Ishida ,  Satoshi Sugaya ,  Takafumi Oshima ,  Norihiko Nadanami ,  Takaki Ootuka ,  Yoshikuni Sato ,  Tatsuo Okumura

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

    IPC分类号： G01N27407

    CPC分类号： G01N27/4074

    摘要： Method and sensor for measuring accurate measurement of NOx concentration in an exhaust gas containing O2,H2O, CO2 and NOx and a NOx gas concentration sensor. A first oxygen pump cell sufficiently pumps out oxygen in a measurement gas such as not to decompose NOx. A pair of electrodes is provided on an inner side and an outer side of a second measurement chamber into which the gas is introduced from a first measurement chamber via a diffusion resistance. A voltage is impressed across the paired electrodes for decomposing NOx in the second measurement chamber to dissociate oxygen which causes the current to flow in a second oxygen ion pump cell. The NOx gas concentration is measured for this current. The voltage impressed across the paired electrodes of the second oxygen ion pump cell is set so as not to dissociate H2O and CO2 present in the second measurement chamber.

    摘要翻译： 用于测量含有O 2，H 2 O，CO 2和NO x以及NOx气体浓度传感器的废气中的NOx浓度的精确测量的方法和传感器。 第一氧气泵电池在测量气体中充分抽出氧气，例如不分解NOx。 一对电极设置在第二测量室的内侧和外侧，气体通过扩散阻力从第一测量室引入到该第二测量室中。 在一对电极上施加电压，用于分解第二测量室中的NOx，以解离氧，这导致电流在第二氧离子泵电池中流动。 测量该电流的NOx气体浓度。 设置在第二氧离子泵电池的成对电极上施加的电压，以使第二测量室中不存在H 2 O和CO 2。

    Method and apparatus for measuring NOx gas concentration
    6.
    发明授权
    Method and apparatus for measuring NOx gas concentration 失效
    测量NOx气体浓度的方法和装置

    公开(公告)号：US06214208B1

    公开(公告)日：2001-04-10

    申请号：US08982869

    申请日：1997-12-02

    申请人： Masashi Ando ,  Noboru Ishida ,  Satoshi Sugaya ,  Takafumi Oshima ,  Norihiko Nadanami ,  Takaki Ootuka ,  Yoshikuni Sato ,  Tatsuo Okumura

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

    IPC分类号： G01N27407

    CPC分类号： G01N27/4074 ,  Y10T436/179228

    摘要： This is a method and apparatus for accurately determining a NOx concentration of a measurement gas that contains H2O and/or CO2, without being affected by a dissociation of H2O and/or CO2. In this method and apparatus, (1) the NOx-measurement gas containing H2O and/or CO2 is introduced to travel through a heated flow channel formed by an oxygen ion conductive solid ceramic electrolyte body that electrically control amount of O2 from the flow channel, (2) while said measurement gas travels, a residual gas including NO and H2O and/or CO2 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 H2O and/or CO2 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.

    摘要翻译： 这是一种用于精确地测定含有H 2 O和/或CO 2的测量气体的NOx浓度而不受H 2 O和/或CO 2离解影响的方法和装置。在该方法和装置中，（1）NOx测量 引入含有H 2 O和/或CO 2的气体通过由氧离子导电固体陶瓷电解质体形成的加热流动通道，该氧气离子传导性固体陶瓷电解质体从流动通道电气控制O2的量，（2）当所述测量气体行进时，残留气体包括 从测量气体形成NO和H 2 O和/或CO 2，（3）所述残留气体流动以接触催化电极，在该催化电极处施加不分离H 2 O和/或CO 2但解离NO的低电压的负极性 使得所述电极将残留气体的NO气体分解为N离子和O离子，并且与电极处的所述残留气体分离的O离子的量成比例地流过电解质体，并且（ 4）测定气体中的NOx浓度基于电流来确定。上述（3）中优选施加的低电压为约350〜450mV。

    Gas sensor
    7.
    发明授权
    Gas sensor 有权
    气体传感器

    公开(公告)号：US06635162B2

    公开(公告)日：2003-10-21

    申请号：US09397931

    申请日：1999-09-17

    申请人： Satoshi Sugaya ,  Norihiko Nadanami ,  Noboru Ishida ,  Takafumi Oshima

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

    IPC分类号： G01N27407

    CPC分类号： G01N27/417

    摘要： A gas sensor having a laminate structure composed of thin sheets of solid electrolyte and including a cavity portion 21 and an oxygen concentration cell 5. The oxygen concentration in the cavity portion 21 is held constant. The oxygen concentration cell 5 includes an active electrode 12 having a relatively high catalytic capability with respect to NOx or combustible gas and an inner common electrode 13/15 (serving as an inactive electrode and an oxygen-concentration-sensing electrode) having a relatively low catalytic capability with respect to NOx or combustible gas. The oxygen concentration cell 5 is disposed in the gas sensor so as to be exposed to the interior of the cavity portion 21. The concentration of NOx or combustible gas is determined based on an electromotive force (of the order of mV) generated between the active electrode 12 and the inner common electrode 13/15 by a concentration cell effect.

    摘要翻译： 具有由固体电解质薄片构成的层叠结构的气体传感器，包括空腔部21和氧浓度电池5.空腔部21中的氧浓度保持恒定。 氧浓度单元5包括相对于NOx或可燃性气体具有相对较高的催化能力的有源电极12和具有相对低的可燃气体的内部公共电极13/15（用作非活性电极和氧浓度感测电极） 相对于NOx或可燃气体的催化能力。 氧气浓度单元5设置在气体传感器中以暴露于空腔部分21的内部。NOx或可燃气体的浓度基于在活性物质之间产生的电动势（大约mV） 电极12和内部公共电极13/15。

    Nitrogen oxide concentration sensor
    8.
    发明授权
    Nitrogen oxide concentration sensor 失效
    氮氧化物浓度传感器

    公开(公告)号：US6071393A

    公开(公告)日：2000-06-06

    申请号：US866452

    申请日：1997-05-30

    申请人： Takafumi Oshima ,  Masashi Ando ,  Noboru Ishida ,  Satoshi Sugaya ,  Norihiko Nadanami

    发明人： Takafumi Oshima ,  Masashi Ando ,  Noboru Ishida ,  Satoshi Sugaya ,  Norihiko Nadanami

    IPC分类号： G01N27/407 ,  G01N33/00

    CPC分类号： G01N27/4074 ,  G01N27/419

    摘要： A small-sized inexpensive nitrogen oxide concentration sensor capable of measuring the concentration of the nitrogen oxide in a measuring gas to a high accuracy. A first oxygen pumping cell, an oxygen concentration measuring cell and a second oxygen pumping cell are formed in different solid electrolyte layers of zirconia and electrodes of oxygen concentration measuring cell are isolated from electrodes of the oxygen pumping cells by insulating film.

    摘要翻译： 一种能够以高精度测量测量气体中的氮氧化物的浓度的小型便宜的氮氧化物浓度传感器。 在氧化锆的不同的固体电解质层中形成第一氧气泵浦单元，氧浓度测量单元和第二氧气泵浦单元，并且通过绝缘膜将氧浓度测量单元的电极与氧气泵浦单元的电极隔离。

    CO sensor and method of measuring CO concentration
    10.
    发明授权
    CO sensor and method of measuring CO concentration 失效
    CO传感器和测量CO浓度的方法

    公开(公告)号：US06797151B2

    公开(公告)日：2004-09-28

    申请号：US10035248

    申请日：2002-01-04

    申请人： Norihiko Nadanami ,  Tomonori Kondo ,  Ryuji Inoue ,  Noboru Ishida ,  Takafumi Oshima

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

    IPC分类号： G01N27407

    CPC分类号： G01N27/4074 ,  G01N33/004

    摘要： A CO sensor and a CO-concentration measurement method which enables accurate measurement of CO concentration irrespective of the hydrogen concentration of a gas under measurement. By applying a first predetermined voltage between first and second electrodes 7 and 8, hydrogen contained in a gas under measurement which has been introduced into a first measurement space 2 via a first diffusion-controlling section 1 dissociates, decomposes, or reacts with another element to generate protons. The thus-generated protons are transported from the first electrode 7 to the second electrode 8 via a first proton-conductive layer 5 or protons are transported from the second electrode 8 to the first electrode 7 via the first proton-conductive layer 5 (when the hydrogen concentration of the measurement gas is extremely low), so that the hydrogen concentration within the first measurement space 2 is controlled to a constant level. The gas under measurement having a controlled hydrogen concentration is introduced into a second measurement space 4 via a second diffusion-controlling section 3, and a second predetermined voltage is applied between third and fourth electrodes 9 and 10. The CO concentration of the gas under measurement is obtained based on current (a limiting proton current) which flows between the third and fourth electrodes 9 and 10. Alternatively, the CO concentration of the gas under measurement is obtained from electromotive force generated between the third and fourth electrodes 9 and 10.

    摘要翻译： 一种CO传感器和CO浓度测量方法，其能够精确测量CO浓度，而与测量的气体的氢浓度无关。 通过在第一和第二电极7和8之间施加第一预定电压，通过第一扩散控制部分1被引入到第一测量空间2中的测量气体中所含的氢离子，分解或与其它元件反应 产生质子。 由此产生的质子经由第一质子传导层5从第一电极7传送到第二电极8，或者质子经由第一质子传导层5从第二电极8输送到第一电极7（当 测量气体的氢浓度极低），使得第一测量空间2内的氢浓度被控制在一定水平。 具有受控氢浓度的测量气体经由第二扩散控制部分3引入第二测量空间4，并且在第三和第四电极9和10之间施加第二预定电压。测量气体的CO浓度 基于在第三和第四电极9和10之间流动的电流（限制质子电流）获得。或者，测量气体的CO浓度是从第三和第四电极9和10之间产生的电动势获得的。