公开(公告)号：EP0859233A2

公开(公告)日：1998-08-19

申请号：EP98300999.4

申请日：1998-02-11

Applicant: NGK INSULATORS, LTD.

Inventor： Kato, Nobuhide ,  Nakagaki, Kunihiko

IPC: G01N27/407 ,  G01N27/417

CPC classification number: G01N27/4074 ,  G01N33/0037 ,  Y02A50/245

Abstract: In order to know the NOx concentration in a measurement gas, a gas sensor is provided with a first chamber (60) for introducing the measurement gas via a first diffusion rate-determining section (56) thereinto, a second chamber (62) for introducing an atmosphere thereof via a second diffusion rate-determining section (60) thereinto, a main pumping cell (68) for controlling the partial pressure of oxygen in the first chamber (60), a measuring pumping cell (82) for pumping out oxygen in the second chamber (62), and a concentration-detecting means (including an ammeter (88)) for detecting a pumping current (Ip2) flowing in accordance with the operation of the measuring pumping cell (82). An inner pumping electrode (64) exposed to the inside of the first chamber (60) is a cermet electrode composed of an alloy of Au and a metal of the platinum group and a ceramic component, and Au is contained in the alloy in a ratio of not less than 0.3 wt% and not more than 35 wt%. Accordingly, it is possible to suppress the reaction of NO + (1/2)O 2 → NO 2 on the electrode, and measure, for example, the NOx concentration in the measurement gas in a stable manner for a long period of time without being affected, for example, by oxygen, CO 2 , and H 2 O.

Abstract translation: 为了知道测量气体中的NOx浓度，气体传感器设置有用于经由第一扩散速率确定部分（56）将测量气体引入其中的第一腔室（60），用于引入测量气体的第二腔室（62） 通过其中的第二扩散速率确定部分（60）的气氛，用于控制第一室（60）中的氧气分压的主泵室（68），测量泵室（82） 第二室62以及用于检测根据测量泵室82的操作而流动的泵浦电流Ip2的浓度检测装置（包括电流表88）。 暴露于第一腔室（60）内部的内部泵浦电极（64）是由Au和铂族金属以及陶瓷组分构成的金属合金构成的金属陶瓷电极，并且Au按比例 不小于0.3重量％且不大于35重量％。 因此，能够抑制电极上的NO +（1/2）O 2→NO 2的反应，能够长期稳定地测定测定气体中的NO X浓度而不会受到影响 例如，通过氧气，CO2和H2O。

公开(公告)号：EP0769694A1

公开(公告)日：1997-04-23

申请号：EP96307586.6

申请日：1996-10-18

Applicant: NGK INSULATORS, LTD.

Inventor： Kato, Nobuhide

IPC: G01N27/407 ,  G01N33/00 ,  G01N27/419

CPC classification number: G01N33/0037 ,  G01N27/4074 ,  G01N27/419 ,  Y02A50/245

Abstract: Disclosed is a NOx sensor and a method of measuring NOx capable of obtaining a large change in signal to measure a concentration of low concentration NOx in a measurement gas continuously and accurately with good response over a long period of time. A NOx sensor comprises a first internal space (6) into which the measurement gas is introduced through a first diffusion rate-determining passage (12), a second internal space (8) arranged with a NOx-reducing catalyst, into which an atmosphere is introduced through a second diffusion rate-determining passage (14), an electrochemical pumping cell for controlling a partial pressure of oxygen in the internal space (6) by using a first oxygen ion-conductive solid electrolyte and electro-chemical cells provided in contact therewith, a partial oxygen pressure-detecting means for detecting the partial pressure of oxygen in the internal space (6) by using the first oxygen ion-conductive solid electrolyte and electro-chemical cells provided in contact therewith, a first electrochemical sensor cell for outputting an electromotive force corresponding to the partial pressure of oxygen in the internal space (8), and a voltage-detecting means (32) for detecting the electromotive force outputted from the first electrochemical sensor cell. The NOx concentration is determined from a value of the electromotive force of the first electrochemical sensor cell detected by the voltage-detecting means (32).

Abstract translation: 公开了一种NOx传感器和测量NOx的方法，其能够获得大的信号变化，以连续且准确地测量测量气体中的低浓度NOx的浓度，并且在长时间内具有良好的响应。 NOx传感器包括第一内部空间（6），测量气体通过第一扩散速率确定通道（12）引入到其中，第二内部空间（8）布置有NOx还原催化剂，气氛 通过第二扩散速率确定通道（14）引入电化学泵浦电池，用于通过使用第一氧离子导电固体电解质和与其接触设置的电化学电池来控制内部空间（6）中的氧分压 部分氧压检测装置，用于通过使用第一氧离子导电固体电解质和与其接触的电化学电池来检测内部空间（6）中的氧的分压，第一电化学传感器单元，用于输出 对应于内部空间（8）中的氧分压的电动势，以及用于检测从内部空间（8）输出的电动势的电压检测装置（32） 第一个电化学传感器单元。 NOx浓度由电压检测装置（32）检测到的第一电化学传感器电池的电动势的值确定。

公开(公告)号：EP0729575A1

公开(公告)日：1996-09-04

申请号：EP95900975.0

申请日：1994-11-08

Applicant: AB VOLVO

Inventor： HJORTSBERG, Ove ,  LUNDGREN, Staffan ,  ÄRLIG, Ulf

IPC: G01N27 ,  G01N33

CPC classification number: G01N27/4074 ,  G01N27/4067 ,  G01N33/0037 ,  Y02A50/245

Abstract: PCT No. PCT/SE94/01050 Sec. 371 Date Jul. 24, 1996 Sec. 102(e) Date Jul. 24, 1996 PCT Filed Nov. 8, 1994 PCT Pub. No. WO95/13533 PCT Pub. Date May 18, 1995The present invention relates to a sensor for detection of oxides of nitrogen forming part of a gas, including a substrate consisting of a solid electrolyte on which a conductive pattern is arranged which includes at least two parts forming an anode and a cathode, a current being produced in the sensor in the presence of oxides of nitrogen and the anode and the cathode being connected to an external voltage source which is adapted to drive the current and to means for measuring the current, which constitutes a measure of the concentration of oxides of nitrogen in the gas. The sensor is adapted to generate the current by means of a transport of oxygen ions in the sensor which essentially originates from oxides of nitrogen being part of the gas, independently from the content of oxygen in the gas.

公开(公告)号：EP0632265A3

公开(公告)日：1996-03-20

申请号：EP94109919.4

申请日：1994-06-27

Applicant: OSAKA GAS CO., LTD. ,  INTERNATIONAL SUPERCONDUCTIVITY TECHNOLOGY CENTER ,  MITSUBISHI DENKI KABUSHIKI KAISHA

Inventor： Kudo, Shuzo ,  Ohnishi, Hisao ,  Ipponmatsu, Masamichi ,  Takano, Satoshi ,  Wakata, Mitsunobu ,  Yamauchi, Hisao ,  Tanaka, Shoji

IPC: G01N27/00 ,  G01N27/12

CPC classification number: G01N27/12 ,  G01N33/0037 ,  Y02A50/245

Abstract: A nitrogen oxide detecting sensor includes a gas detecting portion and electrodes electrically connected to the gas detecting portion. The gas detecting portion is composed mainly of an oxide compound having electric conductivity or semiconductivity. The oxide compound has a crystal structure of 2212 phase or resistivity ranging not more than 50 Ω cm. And, the oxide compound is expressed generally as:
        Bi₂ Sr₂ (Ca 1-X Y X ) Cu₂ O₈ ± δ
(where, X is more than 0 but not more than 1 excluding 1, δ is more than 0 but less than 1 including 1).

公开(公告)号：EP0637379A1

公开(公告)日：1995-02-08

申请号：EP93909598.0

申请日：1993-04-16

Applicant: MALINSKI, Tadeusz

Inventor： MALINSKI, Tadeusz

IPC: B01J31 ,  G01N27 ,  G01N33

CPC classification number: B01J31/1815 ,  B01J2531/025 ,  B01J2531/842 ,  B01J2531/845 ,  B01J2531/847 ,  G01N27/4045 ,  G01N33/0037 ,  Y02A50/245

Abstract: A nitric oxide (NO) microsensor (34) based on catalytic oxidation of NO comprises a thermally-sharpened carbon fiber with a tip diameter of about 0.5-0.7 mu m coated with several layers of p-type semiconducting polymeric porphyrin and cationic exchanger deposited thereon. The microsensor (34) which can be operated in either the amperometric voltametric or coulometric mode utilizing a two or three electrode system, is characterized by a liner response up to about 300 mu M, a response time better than 10 msec and a detection limit of about 10 nM. The sensor (34) of the present invention also discriminates against nitrite, the most problematic interferant in NO measurements. The amount of NO released from a single cell can thus be selectively measured in situ by a porphyrinic microsensor (34) of the invention. A larger scale sensor (12) utilizing porphyrin and cationic exchanger deposited on larger fibers or wires, platinum mesh or tin indium oxide layered on glass, can also be employed when measurement of NO concentration in chemical media, tissue or cell culture is desired.

公开(公告)号：EP0621051A3

公开(公告)日：1994-12-28

申请号：EP94105529.5

申请日：1994-04-09

Applicant: MESSER GRIESHEIM AUSTRIA Ges.m.b.H.

Inventor： Krebs, Christian

IPC: A61M16/08 ,  A61M16/12

CPC classification number: A61M16/12 ,  A61M16/10 ,  A61M2016/102 ,  A61M2202/0275 ,  A61M2205/70 ,  G01N33/0037 ,  G01N33/497 ,  G05D11/138 ,  Y02A50/245

Abstract: Ein Gerät zur kontrollierten Zudosierung von NO zur Atemluft von Patienten mit ARDS oder ähnlichem Erkrankungsbild, besteht im wesentlichen aus einem Respirator (1), einem NO-Dosierbehälter (3), einer Dosiereinheit (4), einem Analysator (2) zur Bestimmung der Konzentration von NO in der Atemluft des Patienten und einem auf die Dosiereinheit wirkenden Steuergerät (6a). Um zu erreichen, daß das Gerät im Dauerbetrieb störungsfrei arbeitet und schnell auf Änderungen der Konzentration von NO reagiert, wird in der Verbindungsleitung zwischen Analysator und Respirator ein Entfeuchter (23) und eine Meßgaspumpe (20) angeordnet. Vorzugsweise wird eine auf die Dosiereinheit wirkende und an den Analysator angeschlossene NO-Grenzwertüberwachungseinheit (18) vorgesehen. Ferner übernimmt eine Kontroll- und Regeleinheit (6b) vorteilhaft die Nachführung des zu dosierenden NO durch Bestimmung der Volumenströme von Atemgas und NO unter Berücksichtigung des NO-Analysewertes.

公开(公告)号：EP0621051A2

公开(公告)日：1994-10-26

申请号：EP94105529.5

申请日：1994-04-09

Applicant: MESSER GRIESHEIM AUSTRIA Ges.m.b.H.

Inventor： Krebs, Christian

IPC: A61M16/08 ,  A61M16/12

CPC classification number: A61M16/12 ,  A61M16/10 ,  A61M2016/102 ,  A61M2202/0275 ,  A61M2205/70 ,  G01N33/0037 ,  G01N33/497 ,  G05D11/138 ,  Y02A50/245

Abstract: Ein Gerät zur kontrollierten Zudosierung von NO zur Atemluft von Patienten mit ARDS oder ähnlichem Erkrankungsbild, besteht im wesentlichen aus einem Respirator (1), einem NO-Dosierbehälter (3), einer Dosiereinheit (4), einem Analysator (2) zur Bestimmung der Konzentration von NO in der Atemluft des Patienten und einem auf die Dosiereinheit wirkenden Steuergerät (6a). Um zu erreichen, daß das Gerät im Dauerbetrieb störungsfrei arbeitet und schnell auf Änderungen der Konzentration von NO reagiert, wird in der Verbindungsleitung zwischen Analysator und Respirator ein Entfeuchter (23) und eine Meßgaspumpe (20) angeordnet. Vorzugsweise wird eine auf die Dosiereinheit wirkende und an den Analysator angeschlossene NO-Grenzwertüberwachungseinheit (18) vorgesehen. Ferner übernimmt eine Kontroll- und Regeleinheit (6b) vorteilhaft die Nachführung des zu dosierenden NO durch Bestimmung der Volumenströme von Atemgas und NO unter Berücksichtigung des NO-Analysewertes.

Abstract translation: 用于对ARDS或类似疾病患者的空气供应的受控剂量的装置基本上包括呼吸机（1），NO计量容器（3），计量单元（4），用于确定 患者空气供应中的NO浓度和作用在计量单元上的控制单元（6a）。 为了在连续运行中实现设备的无干扰功能，并且对NO浓度的变化进行快速反应，除湿器（23）和测量气泵（20）位于分析仪与呼吸机之间的连接线 。 优选地，提供作用于计量单元并连接到分析器的NO极限值监视单元（18）。 此外，监视和控制单元（6b）有利地通过适当考虑NO分析值来确定呼吸气体和NO的体积流量来调节要计量的NO。

公开(公告)号：EP0533826A1

公开(公告)日：1993-03-31

申请号：EP91912221.0

申请日：1991-06-12

Applicant: CATALYTICA INC.

Inventor： WHEELOCK, E., Thomas ,  DALLA BETTA, Ralph, A. ,  SHERIDAN, David, R. ,  REED, Daniel, L.

IPC: G01N25 ,  G01N27 ,  G01N33

CPC classification number: G01N33/0037 ,  G01N25/30 ,  Y02A50/245 ,  Y10T436/177692 ,  Y10T436/179228 ,  Y10T436/208339 ,  Y10T436/218

Abstract: This invention is a process for detecting low levels of nitrogen oxides (NOx) in a flowing gas stream (typically an exhaust gas stream) and a catalytic NOx sensor which may be used in that process.

公开(公告)号：EP0387041A1

公开(公告)日：1990-09-12

申请号：EP90302445.3

申请日：1990-03-07

Applicant: VARIAN ASSOCIATES, INC.

Inventor： Simon, Richard Kenneth Jr.

IPC: G01N30/64 ,  G01N27/66

CPC classification number: G01N27/66 ,  G01N30/64 ,  G01N30/84 ,  G01N33/0037 ,  G01N2030/642 ,  G01N2030/8405 ,  Y02A50/245

Abstract: A gas chromatography detector specific to nitrogen containing compounds is shown. The detector comprises an oxygen pyrolysis chamber for oxidizing the sample eluting from the chromatography column at high temperature and a photoionization cell for detecting the NO x species present in the oxidized sample. Due to the fact that the ionization energies of other oxides present in the sample mixture is greater than the photons created in the photoionization cell, other oxides are not detected.

Abstract translation: 显示了对含氮化合物特异性的气相色谱检测器。 检测器包括用于氧化在高温下从色谱柱洗脱的样品的氧气热解室和用于检测存在于氧化样品中的NOx物质的光电离池。 由于样品混合物中存在的其他氧化物的电离能大于光电离池中产生的光子，所以其他氧化物未被检测。

公开(公告)号：EP3400435A1

公开(公告)日：2018-11-14

申请号：EP16791650.1

申请日：2016-10-14

Applicant: Planetwatch24 ,  Poincelet, Éric ,  Poincelet, Philippe

Inventor： POINCELET, Eric

IPC: G01N33/00

CPC classification number: G01N33/0032 ,  G01N15/0205 ,  G01N15/0606 ,  G01N33/0037 ,  G01N2015/0046 ,  G01N2015/0693 ,  Y02A50/245

Abstract: The invention concerns an on-board device and a mobile method for capturing and recording the fine particles and/or the density of NOx gases in the air for the purpose of dynamically using the gathered data. The device (1) comprises at least one sensor (3) for sensing particles and/or the density of the NOx gases in the air, capable of counting a number of particles or dust particles present in the air, having a dimension ranging between defined values in a volume of air, and a means (7,19) for displaying and/or recording said number and/or density correlated to a determined measurement location of the sensor, the device further being configured to be installed on and to function on a moving vehicle (2) and to be initialised at certain points on the map, or indeed recalibrated, in regular reference to fixed standardised sensors.