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    • 1. 发明申请
    • AMMONIA GAS SENSOR METHOD AND DEVICE
    • AMMONIA气体传感器方法和装置
    • US20090065370A1
    • 2009-03-12
    • US12259115
    • 2008-10-27
    • Balakrishnan G. NairJesse Alan Nachlas
    • Balakrishnan G. NairJesse Alan Nachlas
    • G01N27/26G01N31/10G01N27/04G01N27/22G01N30/96
    • G01N33/0054Y02A50/246Y10T436/175383
    • A mixed potential sensor device and methods for measuring total ammonia (NH3) concentration in a gas is provided. The gas is first partitioned into two streams directed into two sensing chambers. Each gas stream is conditioned by a specific catalyst system. In one chamber, in some instances at a temperature of at least about 600° C., the gas is treated such that almost all of the ammonia is converted to NOx, and a steady state equilibrium concentration of NO to NO2 is established. In the second chamber, the gas is treated with a catalyst at a lower temperature, preferably less than 450° C. such that most of the ammonia is converted to nitrogen (N2) and steam (H2O). Each gas is passed over a sensing electrode in a mixed potential sensor system that is sensitive to NOx. The difference in the readings of the two gas sensors can provide a measurement of total NH3 concentration in the exhaust gas. The catalyst system also functions to oxidize any unburned hydrocarbons such as CH4, CO, etc., in the gas, and to remove partial contaminants such as SO2.
    • 提供了一种混合电位传感器装置和用于测量气体中的总氨(NH 3)浓度的方法。 气体首先被划分成两个指向两个检测室的流。 每个气流由特定的催化剂体系调节。 在一个室中,在一些情况下,在至少约600℃的温度下,处理气体使得几乎所有的氨转化为NOx,并且确定NO对NO 2的稳态平衡浓度。 在第二室中,气体在较低温度,优选低于450℃的催化剂下处理,使得大部分氨转化为氮气(N 2)和蒸汽(H 2 O)。 每个气体在对NOx敏感的混合电位传感器系统中通过感测电极。 两个气体传感器读数的差异可以提供废气中总NH3浓度的测量。 该催化剂体系还用于氧化气体中任何未燃烧的烃如CH4,CO等,并除去部分污染物如SO2。
    • 2. 发明申请
    • Ceramic Particulate Matter Sensor With Low Electrical Leakage
    • 陶瓷微粒传感器低漏电
    • US20090056416A1
    • 2009-03-05
    • US12203070
    • 2008-09-02
    • Balakrishnan G. NairBrett HendersonGangqiang WangThomas Koemer Pace
    • Balakrishnan G. NairBrett HendersonGangqiang WangThomas Koemer Pace
    • G01N37/00
    • G01N15/0656G01N27/60
    • A ceramic particulate matter sensor to measure particulate matter within an exhaust stream. The particulate matter sensor includes a high voltage electrode on a first conductive layer and a detection electrode on a second conductive layer within a stack of ceramic layers. The stack of ceramic layers is bonded as a single rigid structure. The detection electrode generates a measurement of particulate matter within an exhaust stream. The particulate matter sensor also includes an insulating material positioned adjacent to the second conductive layer to insulate the detection electrode from another conductive layer within the stack of ceramic layers. The particulate matter sensor also includes an electrical heater to burn off an accumulation of contaminating particulate matter from at least one electrode of the high voltage and detection electrodes. The particulate matter sensor also includes means for substantially preventing electrical leakage through the insulating material to the second conductive layer.
    • 一种用于测量排气流中的颗粒物质的陶瓷颗粒物质传感器。 颗粒物质传感器包括在第一导电层上的高压电极和位于陶瓷层堆叠内的第二导电层上的检测电极。 陶瓷层的叠层结合为单个刚性结构。 检测电极产生废气流中的颗粒物质的测量。 颗粒物传感器还包括邻近第二导电层定位的绝缘材料,以使检测电极与陶瓷层堆叠内的另一导电层绝缘。 颗粒物质传感器还包括电加热器,以从高电压和检测电极的至少一个电极中消除污染颗粒物质的积聚。 颗粒物传感器还包括用于基本上防止通过绝缘材料到第二导电层的漏电的装置。
    • 5. 发明申请
    • MULTILAYER CERAMIC NOx GAS SENSOR DEVICE
    • 多层陶瓷NOx气体传感器装置
    • US20100096264A1
    • 2010-04-22
    • US12610973
    • 2009-11-02
    • Balakrishnan G. NairJesse Nachlas
    • Balakrishnan G. NairJesse Nachlas
    • G01N27/26
    • G01N27/4067
    • A mixed potential NOx sensor apparatus for measuring the total NOx concentration in a gas stream is disclosed. The NOx sensing apparatus comprises a multilayer ceramic structure with electrodes for sensing both oxygen and NOx gas concentrations and includes screen-printed metallized patterns that function to heat the ceramic sensing element to the proper temperature for optimum performance. This design may provide advantages over the existing technology by miniaturizing the sensing element to provide potentially faster sensor light off times and thereby reduce undesired exhaust gas emissions. By incorporating the heating source within the ceramic sensing structure, the time to reach the temperature of operation is shortened, and thermal gradients and stresses are minimized. These improvements may provide increased sensor performance, reliability, and lifetime.
    • 公开了一种用于测量气流中的总NOx浓度的混合型NOx传感器装置。 NOx感测装置包括具有用于感测氧气和NOx气体浓度的电极的多层陶瓷结构,并且包括用于将陶瓷感测元件加热到适当温度以获得最佳性能的丝网印刷金属化图案。 该设计可以通过使感测元件小型化来提供优于现有技术的优点,以提供潜在的更快的传感器关灯时间,从而减少不期望的废气排放。 通过将加热源并入陶瓷感应结构内,达到操作温度的时间缩短,并使热梯度和应力最小化。 这些改进可以提供增加的传感器性能,可靠性和寿命。
    • 6. 发明授权
    • Multilayer ceramic NOx gas sensor device
    • 多层陶瓷NOx气体传感器装置
    • US07611612B2
    • 2009-11-03
    • US11182278
    • 2005-07-14
    • Balakrishnan G. NairJesse Nachlas
    • Balakrishnan G. NairJesse Nachlas
    • G01N27/407
    • G01N27/4067
    • A mixed potential NOx sensor apparatus for measuring the total NOx concentration in a gas stream is disclosed. The NOx sensing apparatus comprises a multilayer ceramic structure with electrodes for sensing both oxygen and NOx gas concentrations and includes screen-printed metalized patterns that function to heat the ceramic sensing element to the proper temperature for optimum performance. This design may provide advantages over the existing technology by miniaturizing the sensing element to provide potentially faster sensor light off times and thereby reduce undesired exhaust gas emissions. By incorporating the heating source within the ceramic sensing structure, the time to reach the temperature of operation is shortened, and thermal gradients and stresses are minimized. These improvements may provide increased sensor performance, reliability, and lifetime.
    • 公开了一种用于测量气流中的总NOx浓度的混合型NOx传感器装置。 NOx感测装置包括具有用于感测氧气和NOx气体浓度的电极的多层陶瓷结构,并且包括用于将陶瓷感应元件加热到适当温度以获得最佳性能的丝网印刷金属化图案。 该设计可以通过使感测元件小型化来提供优于现有技术的优点,以提供潜在的更快的传感器关灯时间,从而减少不期望的废气排放。 通过将加热源并入陶瓷感应结构内,达到操作温度的时间缩短,并使热梯度和应力最小化。 这些改进可以提供增加的传感器性能,可靠性和寿命。
    • 10. 发明申请
    • Particulate Matter Sensor
    • 颗粒物传感器
    • US20080265870A1
    • 2008-10-30
    • US12111080
    • 2008-04-28
    • Balakrishnan G. NairBrett Henderson
    • Balakrishnan G. NairBrett Henderson
    • G01N27/00H01R43/00
    • G01N15/0656G01N27/60Y10T29/49002
    • A sensor apparatus to burn off contaminating particulate matter from a sensor. The sensor apparatus includes a signal electrode assembly, a detector electrode assembly, and an electrical heater. The signal electrode assembly includes a signal electrode coupled to a signal electrode insulating substrate. The detector electrode assembly includes a detector electrode coupled to a detector electrode insulating substrate. The detector electrode is positioned relative to the sensor electrode to generate a measurement of an ambient condition. The electrical heater is positioned relative to the signal and detector electrode assemblies to burn off an accumulation of contaminating particles from at least one electrode assembly of the signal and detector electrode assemblies.
    • 一种用于从传感器中排除污染颗粒物质的传感器装置。 传感器装置包括信号电极组件,检测器电极组件和电加热器。 信号电极组件包括耦合到信号电极绝缘基板的信号电极。 检测器电极组件包括耦合到检测器电极绝缘基板的检测器电极。 检测器电极相对于传感器电极定位以产生环境条件的测量。 电加热器相对于信号和检测器电极组件定位,以消除来自信号和检测器电极组件的至少一个电极组件的污染颗粒的积聚。