公开(公告)号：US06589409B2

公开(公告)日：2003-07-08

申请号：US09821807

申请日：2001-03-30

申请人： Akira Miyashita ,  Akio Tanaka ,  Toshitaka Saito ,  Keigo Mizutani

发明人： Akira Miyashita ,  Akio Tanaka ,  Toshitaka Saito ,  Keigo Mizutani

IPC分类号： G01N27407

CPC分类号： G01N27/419

摘要： An objective gas to be measured is introduced into first and second chambers which are connected via a diffusion resistive passage. A first electrochemical cell is provided in the first chamber for pumping in and out oxygen in accordance with an applied voltage. A second electrochemical cell is provided in the second chamber and responsive to application of a predetermined voltage for generating a sensor current representing a specific gas concentration in the objective gas. The first electrochemical cell is located between the first chamber and a reference gas chamber so that oxygen pumping in and out operation can be performed between the first chamber and the reference gas chamber.

摘要翻译： 待测量的目标气体被引入通过扩散阻力通道连接的第一和第二室中。 在第一室中提供第一电化学电池，用于根据施加的电压泵入和输出氧气。 在第二室中提供第二电化学电池，并响应于施加预定电压以产生表示目标气体中的特定气体浓度的传感器电流。 第一电化学电池位于第一室和参考气室之间，使得可以在第一室和参考气室之间执行氧气输入和输出操作。

公开(公告)号：US06805782B2

公开(公告)日：2004-10-19

申请号：US09820819

申请日：2001-03-30

申请人： Akio Tanaka ,  Toshitaka Saito ,  Akira Miyashita ,  Keigo Mizutani

发明人： Akio Tanaka ,  Toshitaka Saito ,  Akira Miyashita ,  Keigo Mizutani

IPC分类号： G01N27407

CPC分类号： G01N27/419

摘要： In order to raise accuracy of measurement, a compound layered type of sensing device is provided. The device comprises a plurality of solid electrolyte plates and first to third electrochemical cells. Each cell has a single pair of electrodes disposed on the solid electrolyte plates. A concentration of a gas specified from a gas to be measured pre-processed based on oxygen pumping by the first electrochemical cell is detected by the second electrochemical cell. A difference in electromotive force between the gas to be measured and a reference gas is detected by the third electrochemical cell. The single pair of electrodes of the third electrochemical cell is disposed on the same surface of one of the solid electrolyte plates, and both of the first and third electrochemical cells are located with different ones of the solid electrolyte plates.

摘要翻译： 为了提高测量精度，提供了一种复合分层型感测装置。 该装置包括多个固体电解质板和第一至第三电化学电池。 每个电池具有设置在固体电解质板上的单对电极。 通过第二电化学电池检测由基于第一电化学电池的氧气泵送预先处理的待测气体指定的气体浓度。 通过第三电化学电池检测被测气体与参考气体之间的电动势差。 第三电化学电池的单对电极设置在固体电解质板之一的相同表面上，并且第一和第三电化学电池都位于不同的固体电解质板中。

公开(公告)号：US06994780B2

公开(公告)日：2006-02-07

申请号：US10234248

申请日：2002-09-05

申请人： Keigo Mizutani ,  Kazunori Suzuki ,  Toshitaka Saito ,  Daisuke Makino

发明人： Keigo Mizutani ,  Kazunori Suzuki ,  Toshitaka Saito ,  Daisuke Makino

IPC分类号： G01N27/407

CPC分类号： G01N27/419

摘要： A gas sensor includes a measurement gas chamber into which a measurement gas is introduced. An oxygen pumping cell adjusts an oxygen concentration in the measurement gas chamber. An oxygen monitor cell has a monitor electrode exposed in the measurement gas chamber. The monitor electrode has an oxidizing activity with respect to a specific component of the measurement gas. A sensor cell has a sensor electrode exposed in the measurement gas chamber. The sensor electrode has an oxidizing activity with respect to the specific component of the measurement gas which is lower than the oxidizing activity of the monitor electrode. An oxygen-ion current in the oxygen monitor cell is detected. An oxygen-ion current in the sensor cell is detected. A concentration of the specific component of the measurement gas is detected from a relation between the detected oxygen-ion currents in the oxygen monitor cell and the sensor cell.

公开(公告)号：US06554983B2

公开(公告)日：2003-04-29

申请号：US09810180

申请日：2001-03-19

申请人： Hiroo Imamura ,  Toshitaka Saito ,  Keigo Mizutani ,  Daisuke Makino

发明人： Hiroo Imamura ,  Toshitaka Saito ,  Keigo Mizutani ,  Daisuke Makino

IPC分类号： G01N27407

CPC分类号： G01N27/419

摘要： An objective gas is successively introduced into first and second chambers which are connected via a narrow passage. A first monitor cell, provided on a surface of the first chamber, generates an electromotive force representing an oxygen concentration in the first chamber. A second monitor cell, provided on a surface of the second chamber, generates an electromotive force representing an oxygen concentration in the second chamber. A voltage applied to a pump cell is controlled based on the electromotive forces obtained from the first and second monitor cells.

公开(公告)号：US07867370B2

公开(公告)日：2011-01-11

申请号：US11633434

申请日：2006-12-05

申请人： Nobuyuki Tsuji ,  Akio Tanaka ,  Keigo Mizutani

发明人： Nobuyuki Tsuji ,  Akio Tanaka ,  Keigo Mizutani

IPC分类号： G01N7/00

CPC分类号： G01N27/4075

摘要： A gas sensor element has a solid electrolyte body of oxygen ionic conductivity, a target gas electrode and a reference gas electrode formed on both surfaces of the solid electrolyte body, respectively, a porous diffusion resistance layer, and a catalyst support trap layer. The porous diffusion resistance layer covers the target gas electrode and through which target gases to be measured are passing. The catalyst support trap layer is formed on the outer surface of the porous diffusion resistance layer and supports noble metal catalyst. In the gas sensor element, the noble metal catalyst is made of platinum, rhodium, palladium supported in the catalyst support trap layer. In particular, an addition amount of palladium in the total amount of the noble metal catalyst is within a range of 2 to 65 wt %.

摘要翻译： 气体传感器元件分别具有氧离子传导性的固体电解质体，分别形成在固体电解质体的两个表面上的目标气体电极和参考气体电极，多孔扩散电阻层和催化剂载体捕获层。 多孔扩散电阻层覆盖目标气体电极，待测量的目标气体通过该气体电极。 催化剂载体捕获层形成在多孔扩散电阻层的外表面上，并支持贵金属催化剂。 在气体传感器元件中，贵金属催化剂由负载在催化剂载体捕获层中的铂，铑，钯制成。 特别地，贵金属催化剂总量中钯的添加量在2〜65重量％的范围内。

公开(公告)号：US06205843B1

公开(公告)日：2001-03-27

申请号：US09440859

申请日：1999-11-16

申请人： Akio Tanaka ,  Tomio Sugiyama ,  Shinichiro Imamura ,  Satoshi Hada ,  Keigo Mizutani

发明人： Akio Tanaka ,  Tomio Sugiyama ,  Shinichiro Imamura ,  Satoshi Hada ,  Keigo Mizutani

IPC分类号： G01N27407

CPC分类号： G01N27/419

摘要： A gas sensing element having a sample gas chamber into which a sample gas is introduced, and a reference gas chamber into which a reference gas is introduced. A sensor cell detects a specific gas concentration in the sample gas chamber. An oxygen pump cell pump cell pumps oxygen gas from or to the sample gas chamber. An introducing passage includes at least one pinhole provided on a surface of the oxygen pump cell for introducing the measuring gas into the sample gas chamber. The surface of the oxygen pump cell faces an outside of the gas sensing element. And, a porous diffusion resistive layer is provided on the surface of the oxygen pump cell so as to cover a portion corresponding to the introducing passage, thus serving to reduce or eliminate the effects of temperature dependency upon gas sensor output for properly sized and machine pinholes.

摘要翻译： 具有被引入样本气体的样本气体室的气体传感元件和引入参考气体的参考气体室。 传感器单元检测样品气体室中的特定气体浓度。 氧气泵电池泵电池将氧气从或来自样品气室泵送。 引入通道包括设置在氧泵单元的表面上的至少一个针孔，用于将测量气体引入样气室。 氧气泵单元的表面面向气体感测元件的外部。 并且，在氧泵电池的表面上设置多孔扩散电阻层，以覆盖对应于引入通道的部分，从而用于减小或消除对气体传感器输出的温度依赖性对适当尺寸和机针孔的影响 。

公开(公告)号：US20070144905A1

公开(公告)日：2007-06-28

申请号：US11633434

申请日：2006-12-05

申请人： Nobuyuki Tsuji ,  Akio Tanaka ,  Keigo Mizutani

发明人： Nobuyuki Tsuji ,  Akio Tanaka ,  Keigo Mizutani

IPC分类号： G01N27/26

CPC分类号： G01N27/4075

摘要： A gas sensor element has a solid electrolyte body of oxygen ionic conductivity, a target gas electrode and a reference gas electrode formed on both surfaces of the solid electrolyte body, respectively, a porous diffusion resistance layer, and a catalyst support trap layer. The porous diffusion resistance layer covers the target gas electrode and through which target gases to be measured are passing. The catalyst support trap layer is formed on the outer surface of the porous diffusion resistance layer and supports noble metal catalyst. In the gas sensor element, the noble metal catalyst is made of platinum, rhodium, palladium supported in the catalyst support trap layer. In particular, an addition amount of palladium in the total amount of the noble metal catalyst is within a range of 2 to 65 wt %.

摘要翻译： 气体传感器元件分别具有氧离子传导性的固体电解质体，分别形成在固体电解质体的两个表面上的目标气体电极和参考气体电极，多孔扩散电阻层和催化剂载体捕获层。 多孔扩散电阻层覆盖目标气体电极，待测量的目标气体通过该气体电极。 催化剂载体捕获层形成在多孔扩散电阻层的外表面上，并支持贵金属催化剂。 在气体传感器元件中，贵金属催化剂由负载在催化剂载体捕获层中的铂，铑，钯制成。 特别地，贵金属催化剂总量中钯的添加量在2〜65重量％的范围内。

公开(公告)号：US08168054B2

公开(公告)日：2012-05-01

申请号：US12405635

申请日：2009-03-17

申请人： Keigo Mizutani ,  Shinya Teranishi ,  Katsuhide Akimoto ,  Shoichiro Emmei

发明人： Keigo Mizutani ,  Shinya Teranishi ,  Katsuhide Akimoto ,  Shoichiro Emmei

IPC分类号： G01N27/41

CPC分类号： G01N27/407

摘要： A gas sensing element is disclosed as having a measuring gas chamber to which measuring gases are admitted, a diffusion resistance portion for introducing measuring gases to the measuring gas chamber under diffusion resistance, a sensor cell for detecting a specified gas concentration of measuring gases, and an oxygen pump cell for adjusting an oxygen concentration in the measuring gases. The sensor cell includes a measuring electrode, placed facing the measuring gas chamber, and a reference electrode formed in pair with the measuring electrode. The oxygen pump cell includes an inner pump electrode placed facing the measuring gas chamber, and an outer pump electrode formed in pair with the inner pump electrode. The diffusion resistance portion is placed in an area inside of external end walls of the inner pump electrode to be exposed to the measuring gas chamber.

摘要翻译： 公开了一种气体检测元件，其具有测量气体，容纳测量气体的扩散阻力部分，用于将扩散阻力的测量气体引入测量气体室的扩散阻力部分，用于检测测量气体的特定气体浓度的传感器单元，以及 用于调节测量气体中的氧浓度的氧气泵电池。 传感器单元包括面向测量气体室的测量电极和与测量电极成对成对的参考电极。 氧泵单元包括面向测量气室放置的内泵电极和与内泵电极成对配合的外泵电极。 扩散阻力部分放置在内泵电极的外端壁的内部以暴露于测量气室。

公开(公告)号：US20090205957A1

公开(公告)日：2009-08-20

申请号：US12388625

申请日：2009-02-19

申请人： Satoshi Hada ,  Katsuhide Akimoto ,  Shoichiro Emmei ,  Keigo Mizutani ,  Shinya Teranishi

发明人： Satoshi Hada ,  Katsuhide Akimoto ,  Shoichiro Emmei ,  Keigo Mizutani ,  Shinya Teranishi

IPC分类号： G01N27/16

CPC分类号： G01N27/4071 ,  G01N27/4065

摘要： A gas sensor control device is disclosed as including a sensor cell having a negative terminal, to which a current-voltage converter is connected, and a differential amplifier is connected to the current-voltage converter to provide a current measured result applied to a microcomputer. The current-voltage converter has an opposite-to-sensor terminal to which another differential amplifier is connected. A sensor-side terminal of the current-voltage converter and another differential amplifier is electrically connected to each other via an electric pathway having a sensor-current flow disabling pathway in which a switch circuit is provided. Closing the switch circuit allows a potential difference between both terminals of the current-voltage converter is zeroed. With the switch circuit closed, the microcomputer calculates an element current correcting value, while detecting an electromotive force of the sensor cell based on which a failure is determined.

摘要翻译： 公开了一种气体传感器控制装置，其包括具有负极端子的传感器单元，电流 - 电压转换器连接到该负极端子，并且差分放大器连接到电流 - 电压转换器以提供施加到微型计算机的当前测量结果。 电流 - 电压转换器具有与传感器相对的另一个差分放大器连接的端子。 电流 - 电压转换器的传感器侧端子和另一个差分放大器经由具有传感器电流流动禁止通路的电路相互电连接，在该通路中设置开关电路。 闭合开关电路允许电流 - 电压转换器的两个端子之间的电位差为零。 在开关电路闭合的情况下，微机计算元件电流校正值，同时检测确定了故障的传感器单元的电动势。

公开(公告)号：US20120048749A1

公开(公告)日：2012-03-01

申请号：US13222099

申请日：2011-08-31

申请人： Toshihiko Harada ,  Keigo Mizutani ,  Shinya Teranishi ,  Satoshi Nakamura ,  Yushi Fukuda ,  Takashi Hibino ,  Yanbai Shen

发明人： Toshihiko Harada ,  Keigo Mizutani ,  Shinya Teranishi ,  Satoshi Nakamura ,  Yushi Fukuda ,  Takashi Hibino ,  Yanbai Shen

IPC分类号： G01N27/417 ,  C04B35/64 ,  B05D5/12 ,  G01N27/28 ,  G01N27/40

CPC分类号： H01M8/1016 ,  H01B1/122 ,  H01M8/0289 ,  Y02P70/56

摘要： A proton conductor has a porous sintered body made of tetravalent metallic oxide. Pyrophosphate as tetravalent metallic compound is formed on surfaces and porous walls of the body, and in the inside of each pore of the body. A method produces the proton conductor by immersing the porous sintered body made of tetravalent metallic oxide into liquid solvent containing phosphate, and heating the porous sintered body at 400° C. over 4 hours. A carbon quantity detecting sensor has the proton conductor, a pair of a measuring electrode and a reference electrode, and an electric power source for supplying a predetermined current or voltage to the electrode pair composed of the measuring and reference electrodes. The measuring electrode is formed on one surface of the proton conductor to face the measuring gas. The reference electrode is formed on the other surface of the proton conductor to be apart from the measuring gas.

摘要翻译： 质子导体具有由四价金属氧化物制成的多孔烧结体。 焦磷酸盐作为四价金属化合物形成在身体的表面和多孔壁上，并且在身体的每个孔的内部。 一种方法是通过将由四价金属氧化物制成的多孔烧结体浸入含磷酸盐的液体溶剂中，并在4℃下在400℃下加热该多孔烧结体来产生质子导体。 碳量检测传感器具有质子导体，一对测量电极和参考电极，以及用于向由测量电极和参考电极组成的电极对提供预定电流或电压的电源。 测量电极形成在质子导体的一个表面上以面对测量气体。 参考电极形成在质子导体的另一表面上，以离开测量气体。