公开(公告)号：EP0859951A1

公开(公告)日：1998-08-26

申请号：EP97925660.0

申请日：1997-05-21

Applicant: MOTOROLA, INC.

Inventor： OH, Seajin ,  JOSEPH, Jose ,  ADAMS, Neil ,  YOUNG, Daniel, A. ,  MUI, Gary, K.

IPC: G01N25 ,  G01N33

CPC classification number: G01N33/0047 ,  G01N25/28 ,  G01N33/0016

Abstract: A selective gas sensor (10) for detecting a particular compound, or group of compounds, such as non-methane hydrocarbons, within a high temperature gas stream (12) includes an oxygen generation sytem (14) positioned over an oxygen diffusion region (15). The oxygen generation system (14) and the oxygen diffusion region (15) provide oxygen through a medial temperature control zone (20) to a sensing element (16). The temperature and flux of hydrocarbon components within the high temperature gas stream (12) are regulated by components within the high temperature control zone (20) and by an external temperature control zone (22) in thermal contact with the sensing element (16).

公开(公告)号：WO1999026051A3

公开(公告)日：1999-05-27

申请号：PCT/US1998/021931

申请日：1998-10-20

Applicant: MOTOROLA INC.

Inventor： YOUNG, Daniel, A. ,  MOYA, Adam ,  KORIPELLA, Chowdary, R. ,  NABER, Jeffrey ,  ADAMS, Neil ,  MILLER, Adam ,  MARKYVECH, Craig

IPC: G01N27/26

Abstract: A calorimetric hydrocarbon gas sensor (10) includes an electrochemical oxygen pump (18), a sensing element (12), and a multi-layered substrate (26) separating the sensing element (12) from the electrochemical oxygen pump (18). The multi-layered substrate (26) includes a plurality of overlying insulating layers, in which at least one intermediate layer (60) supports a first primary heater (58), and in which another intermediate layer (52) supports a temperature compensation heater (50a, 50b). The primary heater (58) functions to maintain the calorimetric hydrocarbon gas sensor (10) at a constant, elevated temperature, while the active compensation heater (50a) functions to maintain substantially equal temperatures as determined by the thermometers (46a, 46b) located on an intermediate layer (48) overlying the compensation heaters (50a, 50b). Control circuitry is integrated with power measurement circuitry to measure differences in the heat produced by the compensation heater (50a) and the thermometer (46a) in an active region (100), and the heat produced by the compensation heater (50b) and the thermometer (46b) in a reference region (102).

公开(公告)号：WO1998008074A1

公开(公告)日：1998-02-26

申请号：PCT/US1997008567

申请日：1997-05-21

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  OH, Seajin ,  JOSEPH, Jose ,  ADAMS, Neil ,  YOUNG, Daniel, A. ,  MUI, Gary, K.

IPC: G01N07/00

CPC classification number: G01N33/0047 ,  G01N25/28 ,  G01N33/0016

Abstract: A selective gas sensor (10) for detecting a particular compound, or group of compounds, such as non-methane hydrocarbons, within a high temperature gas stream (12) includes an oxygen generation sytem (14) positioned over an oxygen diffusion region (15). The oxygen generation system (14) and the oxygen diffusion region (15) provide oxygen through a medial temperature control zone (20) to a sensing element (16). The temperature and flux of hydrocarbon components within the high temperature gas stream (12) are regulated by components within the high temperature control zone (20) and by an external temperature control zone (22) in thermal contact with the sensing element (16).

Abstract translation: 用于在高温气流（12）内检测特定化合物或一组化合物（例如非甲烷烃）的选择性气体传感器（10）包括位于氧扩散区（15）上方的氧气生成系统（14） ）。 氧气产生系统（14）和氧气扩散区域（15）通过内部温度控制区（20）向感测元件（16）提供氧气。 高温气流（12）内的烃组分的温度和流量由高温控制区（20）内的组分和与感测元件（16）热接触的外部温度控制区（22）调节。

公开(公告)号：EP0966661A1

公开(公告)日：1999-12-29

申请号：EP98952347.0

申请日：1998-10-20

Applicant: MOTOROLA, INC.

Inventor： YOUNG, Daniel, A. ,  MOYA, Adam ,  KORIPELLA, Chowdary, R. ,  NABER, Jeffrey ,  ADAMS, Neil ,  MILLER, Adam ,  MARKYVECH, Craig

IPC: G01N25 ,  G01N27

CPC classification number: G01N27/16 ,  G01N25/30 ,  G01N27/419

Abstract: A calorimetric hydrocarbon gas sensor (10) includes an electrochemical oxygen pump (18), a sensing element (12), and a multi-layered substrate (26) separating the sensing element (12) from the electrochemical oxygen pump (18). The multi-layered substrate (26) includes a plurality of overlying insulating layers, in which at least one intermediate layer (60) supports a first primary heater (58), and in which another intermediate layer (52) supports a temperature compensation heater (50a, 50b). The primary heater (58) functions to maintain the calorimetric hydrocarbon gas sensor (10) at a constant, elevated temperature, while the active compensation heater (50a) functions to maintain substantially equal temperatures as determined by the thermometers (46a, 46b) located on an intermediate layer (48) overlying the compensation heaters (50a, 50b). Control circuitry is integrated with power measurement circuitry to measure differences in the heat produced by the compensation heater (50a) and the thermometer (46a) in an active region (100), and the heat produced by the compensation heater (50b) and the thermometer (46b) in a reference region (102).

公开(公告)号：EP0954748A1

公开(公告)日：1999-11-10

申请号：EP98942202.0

申请日：1998-08-21

Applicant: MOTOROLA, INC.

Inventor： YOUNG, Daniel, A. ,  ADAMS, Neil, J. ,  LOSINSKI, Armand

IPC: G01N33 ,  G01N1

CPC classification number: G01N33/0009 ,  G01N2001/2285

Abstract: A sensor housing (10) for directing the flow of a gas over two sensitive regions (53, 54) of sensing device (52) includes an inner shroud (12) surrounding the sensing device (52). The inner shroud (12) is inserted into an outer shroud (14), such that a plurality of gas channels (44) are formed between the inner shroud (12) and the outer shroud (14). In operation, a gas enters through inlet orifices (28) in the outer shroud (14) and travels through the gas channels (44) to the proximal end (26) of the inner shroud (12). The flow direction of the gas is then reversed and the gas passes through an inner chamber (50) and over sensitive regions (53, 54) located on the surface of the sensing device (52). Vacuum pressure created at an outlet hole (46) located at a distal end (35) of the outer shroud (14) draws the gas out of the inner chamber (50) and returns the gas to the exterior of the sensor housing (10).