Method and apparatus for modulating a gas sample for a calorimetric gas
sensor
    2.
    发明授权
    Method and apparatus for modulating a gas sample for a calorimetric gas sensor 失效
    用于调制量热气体传感器的气体样品的方法和装置

    公开(公告)号:US5863803A

    公开(公告)日:1999-01-26

    申请号:US772661

    申请日:1996-12-20

    CPC classification number: G01N27/16

    Abstract: A method and apparatus is provided for modulating flux of combustibles reacting with oxygen impinging on a calorimetric gas sensor. The method includes the steps of enclosing a sensing element and a reference element of a calorimetric gas sensor with an apparatus having at least one aperture to allow combustibles to enter and impinge on the sensing element and reference element, periodically restricting the aperture of the apparatus to modulate the flux of combustibles entering at a predetermined frequency to produce an AC output signal from the calorimetric gas sensor, and measuring the sensor output at the frequency at which the aperture is restricted.

    Abstract translation: 提供了一种方法和装置,用于调节与撞击在量热气体传感器上的氧反应的可燃物的通量。 该方法包括以下步骤:将具有至少一个孔的装置的量热气体传感器的感测元件和参考元件封闭以允许可燃物进入并撞击感测元件和参考元件,周期性地限制设备的孔径 调制以预定频率进入的可燃物的通量,以产生来自量热气体传感器的交流输出信号,并以孔径被限制的频率测量传感器输出。

    Feedback control system
    3.
    发明授权
    Feedback control system 失效
    反馈控制系统

    公开(公告)号:US5341643A

    公开(公告)日:1994-08-30

    申请号:US43095

    申请日:1993-04-05

    CPC classification number: F02D41/1441

    Abstract: An air/fuel control system which includes feedback control from an exhaust gas oxygen sensor positioned upstream of a catalytic converter. The exact air/fuel ratio required optimum converter efficiency is determined by generating an emissions signal from both a HC/CO sensor and a NO sensor each positioned downstream of the catalytic converter. The feedback variable is trimmed by a signal derived from the emissions signal to maintain air/fuel operation at a value corresponding to maximum converter efficiency.

    Abstract translation: 一种空气/燃料控制系统,其包括位于催化转化器上游的排气氧传感器的反馈控制。 确定最佳转换器效率的精确空气/燃料比是通过从催化转化器下游的HC / CO传感器和NO传感器两者产生排放信号来确定的。 反馈变量通过从发射信号得到的信号进行修整,以将空气/燃料运行维持在与最大转换器效率相对应的值。

    Selective combustible sensor and method
    4.
    发明授权
    Selective combustible sensor and method 失效
    选择性可燃传感器及方法

    公开(公告)号:US5281313A

    公开(公告)日:1994-01-25

    申请号:US33732

    申请日:1993-03-18

    CPC classification number: G01N27/419

    Abstract: A method of operating a selective combustible sensor having a pump cell and a sensor cell includes the steps of immersing the sensor in a gaseous atmosphere having at least two combustible gases and oxygen gas and allowing the gaseous atmosphere to enter a region between the pump cell and the sensor cell, applying a pumping current to the pump cell, sensing an e.m.f. (V.sub.s), across the sensor cell, varying at least either the V.sub.s or temperature to make the sensor insensitive to one of the combustible gases, and detecting the other combustible gases present in the gaseous atmosphere.

    Abstract translation: 一种操作具有泵浦电池和传感器电池的选择性可燃性传感器的方法包括以下步骤:将传感器浸入具有至少两种可燃气体和氧气的气氛中,并允许气态气体进入泵室和泵室之间的区域 传感器单元,向泵浦单元施加泵送电流,感测电动势 (Vs),跨越传感器单元,至少改变Vs或温度,以使传感器对可燃气体之一不敏感,并且检测存在于气体气氛中的其它可燃气体。

    Method of operating a calorimetric gas sensor
    6.
    发明授权
    Method of operating a calorimetric gas sensor 失效
    操作量热气体传感器的方法

    公开(公告)号:US6131438A

    公开(公告)日:2000-10-17

    申请号:US772660

    申请日:1996-12-20

    CPC classification number: G01N27/16

    Abstract: A method of operating a calorimetric gas sensor by modulating its operating temperature includes the steps of heating a sensing element and a reference element of a calorimetric gas sensor to a first temperature between a predetermined minimum temperature and a light-off temperature of the sensing element, modulating the heating of the sensing element and reference element between a second temperature above the light-off temperature and the first temperature to produce an alternating current (AC) output, and measuring the AC sensor output of the frequency of modulation.

    Abstract translation: 通过调节其工作温度来操作量热气体传感器的方法包括以下步骤:将量热气体传感器的感测元件和参考元件加热到感测元件的预定最小温度和点火温度之间的第一温度, 在高于亮度温度和第一温度的第二温度之间调制感测元件和参考元件的加热,以产生交流(AC)输出,以及测量调制频率的AC传感器输出。

    System and Method for Updating a Baseline Output of a Gas Sensor
    8.
    发明申请
    System and Method for Updating a Baseline Output of a Gas Sensor 有权
    更新气体传感器基准输出的系统和方法

    公开(公告)号:US20090223835A1

    公开(公告)日:2009-09-10

    申请号:US12469874

    申请日:2009-05-21

    CPC classification number: G01N27/417

    Abstract: A method of operating a gas sensor is disclosed, wherein the sensor includes a pumping electrode configuration and a measuring electrode configuration, and wherein the method includes operating the sensor in a first mode in which a first, lower pumping potential sufficient to electrochemically remove an interfering compound from the sensor without electrochemically removing the analyte from the sensor is applied across the pumping electrode configuration and a measuring potential sufficient to electrochemically remove the analyte from the sensor is applied across the measuring electrode configuration; and operating the sensor in a second mode in which a second, higher pumping potential sufficient to electrochemically remove the analyte from the sensor is applied to the pumping electrode configuration.

    Abstract translation: 公开了一种操作气体传感器的方法,其中所述传感器包括泵送电极配置和测量电极配置,并且其中所述方法包括以第一模式操作所述传感器,其中第一较低的泵送电势足以电化学地去除干扰 来自传感器的化合物不经电化学去除传感器中的分析物跨越泵送电极配置,并且在测量电极配置上施加足以电化学去除传感器分析物的测量电位; 并且在第二模式下操作所述传感器,其中将第二较高泵送电势充分地电化学地从所述传感器中去除所述分析物到所述泵送电极配置。

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