公开(公告)号：US20140332379A1

公开(公告)日：2014-11-13

申请号：US14275048

申请日：2014-05-12

Applicant: NGK INSULATORS, LTD.

Inventor： Osamu NAKASONE ,  Shotarou NIIZUMA ,  Noriko HIRATA ,  Yuki NAKAYAMA

IPC: G01N27/41

CPC classification number: G01N27/41 ,  G01N27/419 ,  G01N33/0047

Abstract: Provided is a gas sensor capable of accurately obtaining a hydrocarbon gas concentration even if a measurement gas contains water vapor. A main pumping cell adjusts an oxygen partial pressure of a first internal space such that a hydrocarbon gas in a measurement gas is not substantially burned in the first internal space. An auxiliary pumping cell adjusts an oxygen partial pressure of a second internal space such that inflammable gas components except for hydrocarbon are selectively burned. Then, the measurement gas is introduced into a third internal space through a third diffusion control part. With oxygen concentration equilibrium kept in the third internal space, hydrocarbon existing in the measurement gas that has reached the third internal space is all burned. Then, the concentration of the hydrocarbon gas component existing in the measurement gas is identified based on the magnitude of a current flowing between the measuring electrode and the main pumping electrode at that time.

Abstract translation: 提供了即使测量气体含有水蒸气也能够精确地获得烃气体浓度的气体传感器。 主泵送单元调节第一内部空间的氧分压，使得测量气体中的烃气体在第一内部空间中基本上不被燃烧。 辅助泵送单元调节第二内部空间的氧分压，使得除了烃之外的可燃气体成分被选择性地燃烧。 然后，测量气体通过第三扩散控制部分被引入第三内部空间。 当氧浓度平衡保持在第三内部空间时，已经到达第三内部空间的测量气体中存在的烃全部燃烧。 然后，基于当时在测量电极和主泵送电极之间流动的电流的大小来识别存在于测量气体中的烃气体组分的浓度。

公开(公告)号：US20140332378A1

公开(公告)日：2014-11-13

申请号：US14274994

申请日：2014-05-12

Applicant: NGK Insulators, Ltd.

Inventor： Osamu NAKASONE ,  Satoshi NISHIKAWA ,  Shotarou NIIZUMA ,  Noriko HIRATA ,  Yuki NAKAYAMA

IPC: G01N27/41

CPC classification number: G01N27/41 ,  G01N27/4074 ,  G01N27/419 ,  G01N33/0047

Abstract: Provided is a gas sensor capable of accurately obtaining a hydrocarbon gas concentration even if a measurement gas contains water vapor. A main pumping cell adjusts an oxygen partial pressure of a first internal space such that a hydrocarbon gas in a measurement gas is not substantially burned in the first internal space. An auxiliary pumping cell adjusts an oxygen partial pressure of a second internal space such that inflammable gas components except for hydrocarbon are selectively burned. Then, a measuring pumping cell supplies oxygen to a surface of a measuring electrode. As a result, hydrocarbon existing in the measurement gas being in contact with the measuring electrode is all burned on the surface of the measuring electrode and, based on the magnitude of a current flowing between the measuring electrode and a main pumping electrode at that time, identifies a concentration of a hydrocarbon gas component existing in the measurement gas.

Abstract translation: 提供了即使测量气体含有水蒸气也能够精确地获得烃气体浓度的气体传感器。 主泵送单元调节第一内部空间的氧分压，使得测量气体中的烃气体在第一内部空间中基本上不被燃烧。 辅助泵送单元调节第二内部空间的氧分压，使得除了烃之外的可燃气体成分被选择性地燃烧。 然后，测量泵送单元向测量电极的表面供氧。 结果，与测量电极接触的测量气体中存在的烃全部在测量电极的表面上燃烧，并且基于此时在测量电极和主泵送电极之间流动的电流的大小， 识别存在于测量气体中的烃气体组分的浓度。