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23 条记录 (耗时 0.014 秒)

    Capacitive A/F sensor
    2.
    发明授权
    Capacitive A/F sensor 失效
    电容式A / F传感器

    公开(公告)号：US5389224A

    公开(公告)日：1995-02-14

    申请号：US84498

    申请日：1993-07-01

    申请人： Robert E. Hetrick

    发明人： Robert E. Hetrick

    IPC分类号： G01N27/22 ,  G01N27/00 ,  G01N27/26

    CPC分类号： G01N27/002

    摘要： A sensor for determining the stoichiometric air to fuel ratio (A/F) at the intake of an internal combustion engine is based on a capacitive device in the exhaust stream which can be used to measure the change in the workfunction of an appropriate material which occurs at the stoichiometric point and which forms one of the two interacting elements of the capacitor. To measure A/F over an extended range about stoichiometry the material whose workfunction changes is made the working electrode of an oxygen concentration cell using a solid electrolyte. Oxygen pumping to and from that surface can change the magnitude of the workfunction allowing for a feedback control method for keeping the workfunction constant despite changes in the A/F so that the required pump current becomes a measure of the A/F.

    摘要翻译： 用于确定内燃机入口处的化学计量空燃比（A / F）的传感器基于排气流中的电容性装置，其可用于测量发生的适当材料的功函数的变化 在化学计量点，并形成电容器的两个相互作用元件之一。 为了在大约化学计量的范围内测量A / F，其功能变化的材料是使用固体电解质制成氧浓度电池的工作电极。 从该表面吸入的氧气可以改变工作功能的大小，允许反馈控制方法，用于保持功函数恒定，尽管A / F发生变化，使得所需的泵电流成为A / F的量度。

    Workfunction based A/F sensor
    3.
    发明授权
    Workfunction based A/F sensor 失效
    基于工作功能的A / F传感器

    公开(公告)号：US5310474A

    公开(公告)日：1994-05-10

    申请号：US912389

    申请日：1992-07-13

    申请人： Robert E. Hetrick ,  Allen L. Schamp

    发明人： Robert E. Hetrick ,  Allen L. Schamp

    IPC分类号： G01N27/00 ,  G01N27/62 ,  G01N27/26

    CPC分类号： G01N27/002 ,  G01N27/626

    摘要： A sensor for determining the stoichiometric air to fuel ratio (A/F) at the input to the cylinders of an internal combustion engine which is based on measuring the change in the workfunction of a material which occurs when the oxidizing and reducing species in the adjacent gas phase are at or near their stoichiometric ratio. In one method the sensor includes a material which is capable of thermionically emitting alkali metal or other appropriate ions into an exhaust gas atmosphere where they are subsequently collected by a nearby collector electrode and the magnitude of the emission current is measured. The interaction of the emitting surface with the gas phase reversibly changes the workfunction of the emitting surface from large to smaller values as that gas phase is varied through the stoichiometric ratio with respect to the amounts of the oxidizing and reducing species in the gas. Such a change in workfunction of the surface is accompanied by a change in the rate of the thermionic emission at the stoichiometric ratio thereby sensing that ratio in the gas phase which is proportional to the A/F at the input to the cylinders.

    摘要翻译： 用于确定在内燃机的气缸的输入处的理论空燃比（A / F）的传感器，其基于测量当相邻的氧化和还原物质发生的材料的功函数的变化时 气相处于或接近其化学计量比。 在一种方法中，传感器包括能够将碱金属或其它适当离子热离子发射到废气气氛中的材料，其中它们随后由附近的集电极收集并且测量发射电流的大小。 发射表面与气相的相互作用可逆地将发射表面的功函数从大到小改变，因为气相相对于气体中氧化和还原物质的量的化学计量比而变化。 表面的功函数的这种变化伴随着化学计量比下的热离子发射速率的变化，从而检测气相中与气缸输入端的A / F成比例的比例。

    Mass-flow sensor using aerodynamic damping
    4.
    发明授权
    Mass-flow sensor using aerodynamic damping 失效
    质量流量传感器采用气动阻尼

    公开(公告)号：US5000050A

    公开(公告)日：1991-03-19

    申请号：US492015

    申请日：1990-03-12

    申请人： Robert E. Hetrick

    发明人： Robert E. Hetrick

    IPC分类号： G01F1/20 ,  G01F1/28 ,  G01F1/78 ,  G01N33/38

    CPC分类号： G01F1/28 ,  G01F1/20 ,  G01F1/78 ,  G01N33/388

    摘要： A fluid mass flow sensor uses the effect of aerodynamic drag on a vibrating object. The drag damps the resonance oscillations of the vibrator in an amount proportional to the mass flow. An electronic feedback circuit associated with the mass flow sensor has the effect of allowing for fast response time despite the use of a high Q vibrator and allows for electronic calibration of the device.

    摘要翻译： 流体质量流量传感器使用气动阻力对振动物体的影响。 该阻力将振动器的共振振荡减小到与质量流量成比例的量。 与质量流量传感器相关联的电子反馈电路具有允许快速响应时间的效果，尽管使用高Q振动器并且允许电子校准装置。

    Resonant vibrating structures with driving sensing means for noncontacting position and pick up sensing
    6.
    发明授权
    Resonant vibrating structures with driving sensing means for noncontacting position and pick up sensing 失效
    具有用于非接触位置和拾取感测的驱动感测装置的谐振振动结构

    公开(公告)号：US4806859A

    公开(公告)日：1989-02-21

    申请号：US7033

    申请日：1987-01-27

    申请人： Robert E. Hetrick

    发明人： Robert E. Hetrick

    IPC分类号： G01B7/14 ,  G01B7/00 ,  G01D5/14 ,  G01P3/42 ,  G01P3/487 ,  G01P3/488 ,  G01R33/02 ,  H01L41/08 ,  H02N2/00

    CPC分类号： G01P3/488 ,  G01B7/003 ,  G01D5/14 ,  G01P3/42 ,  G01P3/487

    摘要： A vibration type sensor can make a noncontacting measurement of position or pick up the passage of an object past a point. The sensor has a coil of wire placed on a vibrating structure. As an object with an attached magnet approaches the coil, an emf is induced in the coil indicating position. Alternatively, the magnet remains fixed with respect to the vibrating coil while a material of high magnetic permeability approaches the coil and magnet combination thereby perturbing the magnetic field and changing the induced emf. This method can be used to obtain a linear variation of sensor output with position or to enable the use of the device as a pickup sensor.

    摘要翻译： 振动型传感器可以对位置进行非接触式测量，或拾取物体通过点的通道。 传感器具有放置在振动结构上的线圈。 当具有附接磁体的物体接近线圈时，在线圈指示位置感应出电动势。 或者，磁体相对于振动线圈保持固定，而高磁导率的材料接近线圈和磁体组合，从而扰乱磁场并改变感应的电动势。 该方法可以用于获得具有位置的传感器输出的线性变化，或者能够使用该装置作为拾取传感器。

    Absolute fluid pressure sensor
    7.
    发明授权
    Absolute fluid pressure sensor 失效
    绝对液压传感器

    公开(公告)号：US4739664A

    公开(公告)日：1988-04-26

    申请号：US017291

    申请日：1987-02-20

    申请人： Robert E. Hetrick

    发明人： Robert E. Hetrick

    IPC分类号： G01L9/00 ,  G01L9/08

    CPC分类号： G01L9/0022

    摘要： A pressure sensor uses two fluidically coupled piezoelectrically driven, vibrating cantilever structures, each tuned to the same fundamental resonance frequency. One cantilever, the driver, is electrically driven at resonance and at constant vibrational amplitude. The other cantilever, the receiver, responds due to the gaseous coupling and generates an output signal proportional to pressure.

    摘要翻译： 压力传感器使用两个流体耦合的压电驱动的振动悬臂结构，每个结构调谐到相同的基本共振频率。 一个悬臂，驱动器，在共振和恒定的振动振幅电驱动。 另一个悬臂，接收器由于气体耦合而响应，并产生与压力成比例的输出信号。

    Transient mode oxygen sensor and method
    8.
    发明授权
    Transient mode oxygen sensor and method 失效
    瞬态模式氧传感器及方法

    公开(公告)号：US4272330A

    公开(公告)日：1981-06-09

    申请号：US126747

    申请日：1980-03-03

    申请人： Robert E. Hetrick

    发明人： Robert E. Hetrick

    IPC分类号： G01L9/18 ,  G01N27/406 ,  G01N27/407 ,  G01N27/417 ,  G01N27/58

    CPC分类号： G01N27/417 ,  G01N27/4065

    摘要： This specification discloses a device to determine the partial pressure of oxygen in a gaseous atmosphere. The device, which is immersed in the atmosphere, is constructed to define an enclosed volume in which the atmosphere can be established by means of a small leak. The enclosing structure contains two partitions, a pump cell and a sensor cell, which can conduct oxygen ions and act as electrochemical cells. When attached to an external power supply, the current I.sub.P drawn through the pump cell either adds or removes (from or to the ambient) gaseous oxygen from the volume. As a result of the pumping action, an EMF (V.sub.S) develops across the sensor cell which can be used to measure the change in oxygen partial pressure in the volume relative to the ambient. In a transient mode, a voltage step is applied to the pump cell removing (adding) oxygen from (to) the volume. The rate of change of V.sub.S with respect to time at the instant of the voltage step is measured. This time derivative is inversely proportional to oxygen partial pressure.

    摘要翻译： 本说明书公开了一种用于确定气体气氛中的氧分压的装置。 浸入大气中的装置被构造成限定一个封闭的容积，借助于一个小的泄漏可以建立大气。 封闭结构包含两个隔板，一个泵电池和一个传感器电池，可以传导氧离子并充当电化学电池。 当连接到外部电源时，通过泵电池抽出的当前IP可以从体积中添加或去除（从或环境）气态氧气。 作为泵送动作的结果，EMF（VS）横跨传感器单元产生，可用于测量体积相对于环境的氧分压变化。 在瞬态模式中，电压步骤被施加到泵电池从（至）体积中去除（添加）氧气。 测量VS电压相对于电压阶段时刻的变化率。 该时间导数与氧分压成反比。

    Wide range workfunction based A/F sensor
    10.
    发明授权
    Wide range workfunction based A/F sensor 失效
    宽范围工作功能的A / F传感器

    公开(公告)号：US5275712A

    公开(公告)日：1994-01-04

    申请号：US913311

    申请日：1992-07-14

    申请人： Robert E. Hetrick ,  Allen L. Schamp

    发明人： Robert E. Hetrick ,  Allen L. Schamp

    IPC分类号： G01N27/41 ,  G01N27/00 ,  G01N27/60 ,  G01N27/62 ,  G01N27/26

    CPC分类号： G01N27/626 ,  G01N27/002

    摘要： A sensor determines a wide range of air-to-fuel ratio values (A/F) about the stoichiometric A/F in a gaseous mixture which has oxidizing and reducing species as might be found in an automotive exhaust. The sensor includes a surface that serves simultaneously as the working electrode of a solid-state oxygen concentration cell and as a surface whose workfunction changes from a higher to a lower value as the oxidizing and reducing species in the adjacent gas phase, and in interaction with the surface, pass from an excess oxidizing to the excess reducing condition about the stoichiometric ratio. In one embodiment, the surface exposed to the gas in question is the emitter electrode of a thermionic diode which emits positively charged alkali ions into the exhaust ambient where they are collected by a nearby collector electrode. Changes in the ratio of the oxidizing and reducing species about the stoichiometric ratio produce corresponding changes in the thermionic emission. Oxygen pumping to or from the working electrode modifies the thermionic emission in a systematic way to provide a pumping method of operation in which the magnitude of the pump current required to maintain the thermionic emission current at some preset value despite changes in the A/F ratio of the ambient leads to a relationship between pump current and A/F that can be used to sense the A/F.

    摘要翻译： 传感器确定在气态混合物中大约有化学计量A / F的空气 - 燃料比值（A / F）的宽范围，气体混合物具有在汽车尾气中可能发现的氧化和还原物质。 传感器包括同时用作固态氧浓度电池的工作电极的表面，以及作为相邻气相中氧化还原物质的功函数从较高值变为较低值的表面，并且与 该表面从化学计量比的过剩氧化过渡到过剩还原条件。 在一个实施例中，暴露于所讨论的气体的表面是热离子二极管的发射电极，其将带正电的碱离子发射到排气环境中，在那里它们被附近的集电极收集。 氧化和还原物质的比例关于化学计量比的变化产生热离子发射的相应变化。 氧气泵送到工作电极或从工作电极泵送，以系统的方式改变热离子发射，以提供一种泵送方法，其中尽管A / F比率有所变化，仍将热电子发射电流保持在某一预设值所需的泵浦电流幅值 的环境导致泵电流和A / F之间的关系，可用于感测A / F。