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1. 发明专利

JP2006017495A Soot detector and soot detecting method 审中-公开
标题翻译： SOOT DETECTOR和SOOT检测方法
公开(公告)号：JP2006017495A
公开(公告)日：2006-01-19
申请号：JP2004193388
申请日：2004-06-30
申请人： Ngk Spark Plug Co Ltd , 日本特殊陶業株式会社
发明人： KATSUTA MASATO , FUJITA HIROTERU , HAYASHI CHIE
IPC分类号： G01N27/60
摘要： PROBLEM TO BE SOLVED: To provide a soot detector constituted so as to effectively utilize the phenomenon that dielectric breakdown is produced between both electrodes of a detection element in a region, where the discharge current in a discharge phenomenon is low, by the soot between both electrodes, to properly detect soot or its concentration regardless of the amount of the soot while minimizing the abrasion of both electrodes.
SOLUTION: In a state that the detection element 100 is exposed to the exhaust gas of a diesel engine by both electrodes 121 and 132, high voltage is applied across both electrodes 121 and 132 at mutually different periods while controlling a booster circuit 240 by a microcomputer 210. The microcomputer 210 judges the presence of the soot between both electrodes 121 and 132 on the basis of the difference between respective voltages generated between both electrodes 121 and 132 by accompanying the application of high voltage at the mutually different periods and the soot between both electrodes 121 and 132 is detected by accompanying the judgment of the presence of the soot.
COPYRIGHT: (C)2006,JPO&NCIPI
摘要翻译：要解决的问题：提供一种烟尘检测器，其构造为有效地利用在放电现象中的放电电流低的区域中的检测元件的两个电极之间产生电介质击穿的现象，由两个电极之间的烟灰，以适当地检测煤烟或其浓度，而不管烟灰的量，同时最小化两个电极的磨损。解决方案：在检测元件100通过两个电极121和132暴露于柴油发动机的排气的状态下，在控制升压电路240的同时在两个电极121和132两端施加高电压微型计算机210基于通过在相互不同的时间段施加高电压而在两个电极121和132之间产生的各个电压之间的差异来判断两个电极121和132之间的烟灰的存在，以及通过伴随烟灰的存在的判断来检测两个电极121和132之间的烟灰。版权所有（C）2006，JPO＆NCIPI

2. 发明专利

JP2005069719A Humidity sensor 审中-公开
标题翻译：湿度传感器
公开(公告)号：JP2005069719A
公开(公告)日：2005-03-17
申请号：JP2003209109
申请日：2003-08-27
申请人： Ngk Spark Plug Co Ltd , 日本特殊陶業株式会社
发明人： KATSUTA MASATO , YAMADA TETSUO , FUJITA HIROTERU , ISHIDA NOBORU
IPC分类号： G01N27/12
CPC分类号： G01N27/12
摘要： PROBLEM TO BE SOLVED: To enhance the poisoning-resistant characteristics of a humidity sensor against phosphorus, another metal, an organometal compound or an inorganic metal compound other than silicon by devising the specific surface area of the protective layer of the humidity sensor.
SOLUTION: The protective layer 50 is lamellarly formed on the right-hand part of the surface of an electric insulating substrate 10 so as to coat the surface and outer peripheral surface of an upper electrode 40 and the outer peripheral part of a humidity-sensitive layer 30. Herein, the specific surface area of the protective layer 50 is set to a value within a range of 3.0-10.0 (m
2 /g).
COPYRIGHT: (C)2005,JPO&NCIPI
摘要翻译：要解决的问题：为了通过设计湿度传感器的保护层的比表面积来提高湿度传感器对磷，其它金属，有机金属化合物或除硅以外的无机金属化合物的耐中毒性能。解决方案：保护层50层叠形成在电绝缘基板10的表面的右手部分上，以便涂覆上电极40的表面和外周表面以及湿电机的外周部分这里，将保护层50的比表面积设定为3.0〜10.0（m / SP> 2 / g）的范围内的值。版权所有（C）2005，JPO＆NCIPI

3. 发明专利

JP2001234736A NOx REMOVAL SYSTEM AND METHOD 失效
公开(公告)号：JP2001234736A
公开(公告)日：2001-08-31
申请号：JP2000050266
申请日：2000-02-25
申请人： NGK SPARK PLUG CO
发明人： INOUE TAKAHARU , KATO KENJI , FUJITA HIROTERU
IPC分类号： F02D45/00 , B01D53/56 , B01D53/74 , B01D53/94 , F01N3/00 , F01N3/08 , F01N3/28
摘要： PROBLEM TO BE SOLVED: To provide a NOx removal device and its method capable of efficiently making nitrogen oxides in exhaust gas exhausted from an internal combustion engine harmless. SOLUTION: Ammonia and/or urea is added to exhaust gas exhausted from the internal combustion engine 12 by an injector 14 in a catalyst front pipe 13a and exhaust gas is subsequently reduced and denitrified in denitration catalyst 15. Ammonia in exhaust gas passing through denitration catalyst 15 is detected by an ammonia sensor 16. As an ammonia sensor element installed in the ammonia sensor 16, the ammonia sensor element in which an sensor output for ammonia of 300 deg.C and 800 ppm in concentration is more than twice a sensor output for nitrogen monoxide of 300 deg.C and 800 ppm in concentration is preterably used when the temperature of a detecting part is held at 580 deg.C.

4. 发明专利

JP2001215211A GAS SENSOR WITH HEATER 失效
公开(公告)号：JP2001215211A
公开(公告)日：2001-08-10
申请号：JP2000025375
申请日：2000-02-02
申请人： NGK SPARK PLUG CO
发明人： INOUE TAKAHARU , KATO KENJI , FUJITA HIROTERU
IPC分类号： G01N27/409 , G01N27/416
摘要： PROBLEM TO BE SOLVED: To unifromly heat a closed end part of a detecting element by a ceramic heater, in a gas sensor with a heater provided with the bottomed cylindrical detecting element and the ceramic heater arranged in its inside. SOLUTION: When dimensions and ratios of various constitutive members between the element S and the ceramic heater 17 arranged inside the element S, a ratio W2/W3 of a distance W2 along a longitudinal direction of the element S upto an end part 52a of an opening end part side of the element S in a heating pattern part 52 to a distance W3 along the longitudinal direction of the element S from a closed end part outer face of the element S upto the end part of the opening end part side in an outside electrode 7 is set within a range of 0.7-2.0. The closed end part of the element S is heated unifomly as a result thereof.

5. 发明专利

JP2001108649A APPARATUS AND METHOD FOR MEASUREMENT OF CONCENTRATION OF COMBUSTIBLE GAS AS WELL AS APPARATUS AND METHOD FOR MEASUREMENT OF CONCENTRATION OF HYDROCARBON GAS 失效
公开(公告)号：JP2001108649A
公开(公告)日：2001-04-20
申请号：JP2000145622
申请日：2000-05-17
申请人： NGK SPARK PLUG CO
发明人： FUJITA HIROTERU , KITANOYA SHOJI , KATO KENJI , FUMA TOSHIHIRO , INOUE TAKAHARU , OSHIMA TAKAFUMI
IPC分类号： G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide an apparatus and a method, for the measurement of the concentration of a combustible gas, in which the dependence of the measurement on a change in the concentration of oxygen is small and in which the dependence of the measurement on a temperature is small and to provide an apparatus and a method for the measurement of the concentration of a hydrocarbon gas. SOLUTION: The inner surface of a bottomed cylindrical solid electrolyte body is coated with a paste to be used as a reference electrode. In addition, a platinum and/or gold layer which is to be used as a first detecting electrode layer is formed on the outer surface and only in a part up to the tip part of the solid electrolyte body from a part near the boundary face between a heating resistor formed at the inside of a heater element arranged and installed inside the solid electrolyte body and a lead part. After that, a paste which is to be used as a second detecting electrode layer and which contains a gold powder and metal oxide is coated on the first detecting electrode layer so as to be fired. After that, a diffusion layer which contains spinel is formed on the surface of a detecting electrode by a thermal spraying operation. The heater element is arranged and installed in such a way that its tip part comes into contact with the inside bottom part of the solid electrolyte body. A lead wire which is used to measure an internal resistance is derived from the reference electrode. The lead wire and the lead wire of the detecting electrode are connected to a temperature control device.

6. 发明专利

JP2000292408A SENSOR DEVICE 失效
公开(公告)号：JP2000292408A
公开(公告)日：2000-10-20
申请号：JP10075299
申请日：1999-04-08
申请人： NGK SPARK PLUG CO
发明人： FUJITA HIROTERU , NADANAMI NORIHIKO , INOUE TAKAHARU
IPC分类号： G01N27/41 , G01N27/409
摘要： PROBLEM TO BE SOLVED: To provide a sensor device largely enhanced in oxygen pumping capacity by reducing the interfacial resistance of the solid electrolyte comprising oxygen ion conductive oxide and a noble metal electrode to a large extent and operable even at low temp. of 700 deg.C or lower. SOLUTION: A sensor device is constituted by forming an electrode 2 containing at least one of metal oxide and composite oxide on an oxygen ion conductive solid electrolyte. MnO2 is preferably used as metal oxide and LaGaO3 composite oxide is preferably used as composite oxide. As the oxygen ion conductive solid electrolyte 1, LaGaO3 composite oxide, ZrO2 oxide or LeO2 oxide is preferable. The electrode 2 is formed from at least one component selected from Pt, Au, Pd, Ir, Rh, In, Ag, Tl and Cu.

7. 发明专利

JP2000258390A GAS SENSOR 失效
公开(公告)号：JP2000258390A
公开(公告)日：2000-09-22
申请号：JP6699499
申请日：1999-03-12
申请人： NGK SPARK PLUG CO
发明人： NADANAMI NORIHIKO , FUJITA HIROTERU , INOUE TAKAHARU , OSHIMA TAKAFUMI
IPC分类号： G01N27/41 , G01N27/406 , G01N27/407 , G01N27/416 , G01N33/00
摘要： PROBLEM TO BE SOLVED: To provide a hydrogen gas sensor that operates at a low temperature in hydrogen-rich atmosphere and can accurately measure the concentration of hydrogen in the fuel gas of, especially, a fuel cell. SOLUTION: A gas sensor is provided with a proton conduction layer 5 of a macromolecular electrolyte, first and second electrodes 3 and 4 that are in contact with the proton conduction layer 5 and are provided with hydrogen dissociation capacity, a gas diffusion speed-controlling layer 2 for diffusing gas to be measured being provided between the gas atmosphere to be measured and the first electrode 3 to the first electrode 3 in a diffusion speed-controlling state, and an intricate support 1 for supporting these. A hydrogen gas passing through the gas diffusion speed-controlling layer 2 and reaching the first electrode 3 is dissociated into protons by the catalysis operation of Pt contained in the electrode and voltage being applied to the first electrode 3, passes through the proton conduction layer 5, is pumped out to the second electrode 4, becomes a hydrogen gas again, and is diffused to the gas atmosphere to be measured. When the application voltage is fully large, a limiting current flows between the first and second electrodes 3 and 4 and the size is proportional to the concentration of the hydrogen gas in the gas to be measured.

8. 发明专利

JP2003270181A HUMIDITY SENSOR 审中-公开
公开(公告)号：JP2003270181A
公开(公告)日：2003-09-25
申请号：JP2002074278
申请日：2002-03-18
申请人： NGK SPARK PLUG CO
发明人： FUJITA HIROTERU , FUJITA KOICHI , INOUE TAKAHARU , ISHIDA NOBORU , YAGI HIDEAKI , HORII KATSUHIKO , OSHIMA TAKAFUMI
IPC分类号： G01N27/02 , G01N27/12
摘要： PROBLEM TO BE SOLVED: To provide a humidity sensor for highly accurately detecting humidity over a long period. SOLUTION: In a moisture sensitive element part 3 of this humidity sensor 1, a pair of lead parts 7, 9, are arranged on an alumina insulating substrate 5, and a lower electrode 11, a moisture sensitive layer 13, an upper electrode 15 and a protective layer 16 are laminatedly arranged thereon. The moisture sensitive layer 13 is a porous layer formed by thick-film printing, and is mainly composed of a moisture sensitive material of Al 2 O 3 -SnO 2 -TiO 2 . The moisture sensitive material has resistance value changeable when the humidity in the surrounding atmosphere changes (namely, an oxide whose resistance is lowered when the humidity increases). The moisture sensitive layer 13 contains a glass component comprising silicate glass and an alkali metal comprising Li other than Al 2 O 3 -SnO 2 -TiO 2 and is a porous body formed by covering with a glass phase, the surface of a skeleton part comprising a crystal phase of the oxide. COPYRIGHT: (C)2003,JPO

9. 发明专利

JP2002357580A HUMIDITY SENSOR AND METHOD FOR MANUFACTURING SENSOR ELEMENT 失效
公开(公告)号：JP2002357580A
公开(公告)日：2002-12-13
申请号：JP2001165320
申请日：2001-05-31
申请人： NGK SPARK PLUG CO
发明人： FUJITA HIROTERU , SUGAYA SATOSHI , INOUE TAKAHARU , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/12
摘要： PROBLEM TO BE SOLVED: To provide a humidity sensor for effectively preventing poisoning due to lead or the like of an electrode and a humidity sensitive layer, even an exhaust gas of an automobile ort the like and superior in durability or the like having stable humidity sensitive characteristic over a long period, and to provide a method for manufacturing a sensor element. SOLUTION: The humidity sensor S is provided with a poisoning prevention layer 6, where the circumference of coarse particle powder comprises composite powder covered by particulate powder an voids without filling a gap between the composite powders with the particulate powder disperse and exist. In addition, the coarse particle powder and the particulate powder comprise ceramic powder, and are particularly preferably titania powder, having a peak at 1 μm or shorter and the powder of the composite oxide containing aluminum atoms, such as spinel having a peak at 10 μm or longer. The poisoning preventing layer can be formed by applying slurry containing a solvent, such as ceramic powder different in a specific surface, an organic binder and methanol on the surface of a protective layer 5 to be dried.

10. 发明专利

JP2002357579A HUMIDIFY SENSOR 失效
公开(公告)号：JP2002357579A
公开(公告)日：2002-12-13
申请号：JP2001165318
申请日：2001-05-31
申请人： NGK SPARK PLUG CO
发明人： FUJITA HIROTERU , YAMADA TETSUO , ISHIDA NOBORU , OSHIMA TAKAFUMI
IPC分类号： G01N27/12
摘要： PROBLEM TO BE SOLVED: To provide a humidity sensor suppressing deterioration of a humidity sensitive layer and maintaining stable performance over a long period, even under an atmosphere to be measured contains toxic substances and a high temperature atmosphere. SOLUTION: The humidity sensor 1 is provided with an insulation substrate 11 comprising alumina, the humidity sensitive layer 13 having alumina, titania, tin oxide and the like with a prescribed mass ratio, a detection electrode (lower electrode 12 and upper electrode 14) comprising noble metal such as Pt and Au, and a protection layer 15 comprising metal oxide and composite oxide of either alumina, spinel or the like and is a porous body. The detection electrode can be the porous body, and the humidity sensitive layer is preferably the porous body. In addition, a heater 111 and a temperature measuring resistor 112 are provided in the inside of the insulation substrate, and is provided directly under the humidity sensitive layer in the inside of the insulation substrate.

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