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    • 8. 发明申请
    • NOx gas sensor method and device
    • NOx气体传感器的方法和装置
    • US20060027465A1
    • 2006-02-09
    • US11137693
    • 2005-05-25
    • Balakrishnan NairJesse NachlasMichael Middlemas
    • Balakrishnan NairJesse NachlasMichael Middlemas
    • G01N27/26
    • G01N27/4074G01N33/0013G01N33/0037Y02A50/245
    • The present invention is a method and apparatus for measuring the total NOx concentration in a gas stream utilizing the principles of a NOx sensor, i.e., mixed potential sensor. The exhaust gas is first conditioned by a catalyst assembly that converts the various species of nitrogen oxide gases present to a fixed steady state concentration ratio of NO2/NO, where NO2 is approximately 0-10% of the total NOx concentration present in the gas exhaust, thereby enabling the NOx sensor to generate a meaningful and reproducible determination of the concentration of total NOx present in the gas being measured. The catalyst assembly also functions to oxidize any unburned combustibles such as CH4, CO, etc., and remove potential contaminants such as SO2.
    • 本发明是一种利用NO x传感器即混合电位传感器的原理测量气流中总NO x浓度的方法和装置。 废气首先由催化剂组件调节,该催化剂组件将存在的各种氮氧化物气体转化为固定的NO 2 NO 2 / NO的稳态浓度比,其中NO 2 是气体排气中存在的总NO x x浓度的约0-10%,从而使得NO x传感器能够产生有意义且可重现的总浓度的确定 存在于待测气体中的NO x。 催化剂组合物还用于氧化任何未燃烧的可燃物如CH 4,CO等,并除去潜在的污染物如SO 2。
    • 9. 发明授权
    • Multilayer ceramic NOx gas sensor device
    • 多层陶瓷NOx气体传感器装置
    • US08414752B2
    • 2013-04-09
    • US12610973
    • 2009-11-02
    • 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 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。