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    Software nullification of transducer induced offset errors within a flow rate measurement system
    82.
    发明授权
    Software nullification of transducer induced offset errors within a flow rate measurement system 失效
    在流量测量系统内传感器引起的偏移误差的软件无效

    公开(公告)号：US5563353A

    公开(公告)日：1996-10-08

    申请号：US376823

    申请日：1995-01-23

    Applicant: Vincent Ferri

    Inventor： Vincent Ferri

    IPC: G01F1/00 ,  B61H11/06 ,  G01F1/36 ,  G01F1/40 ,  G01F1/50 ,  G01F1/38

    CPC classification number: G01F1/50 ,  G01F1/363 ,  G01F1/40

    Abstract: Fluid flow in a conduit is measured by placing a flow block in the conduit which introduces variations in the flowpath which cause local pressure variations. The pressure variations are converted to electrical signals by transducers, and the electrical signals are processed to obtain flow rate values. To provide a correction for transducer drift, the transducer signals are examined during a time when there is known to be zero flow in the conduit. The difference between the transducer signals during a time when there is zero flow is used as a measure of transducer drift. A value for the drift is stored in computer memory and used subsequently, when fluid flow is resumed. This invention is specifically intended for use in railroad airbrake systems, where it is used in a locomotive to provide an accurate and reliable measurement of air supplied to the brake pipe of the air brake system.

    Abstract translation: 通过在导管中放置流动块来测量管道中的流体流动，其引入导致局部压力变化的流动路径中的变化。 通过换能器将压力变化转换为电信号，并且处理电信号以获得流量值。 为了提供换能器漂移的校正，在已知导管中已知零流动的时间期间检查换能器信号。 在零流量时，换能器信号之间的差异被用作传感器漂移的量度。 漂移的值存储在计算机存储器中，随后在恢复流体流动时使用。 本发明专门用于铁路空气制动系统中，其用于机车中以提供供给空气制动系统的制动管的空气的精确和可靠的测量。

    Fluid sensor including substantially linear flow resistor
    84.
    发明授权
    Fluid sensor including substantially linear flow resistor 失效
    流体传感器包括基本上线性的流量电阻器

    公开(公告)号：US5537860A

    公开(公告)日：1996-07-23

    申请号：US288766

    申请日：1994-08-11

    Applicant: Hans-Georg Haertl

    Inventor： Hans-Georg Haertl

    IPC: G01F1/38 ,  G01F1/40 ,  G01F1/50 ,  G01F15/02 ,  G01N11/08 ,  G01N11/00

    CPC classification number: G01F1/40 ,  G01F1/50 ,  G01F15/028 ,  G01N11/08

    Abstract: The volumetric flow rate of a fluid is determined essentially independently of the properties of the fluid by guiding the volumetric fluid flow to be measured through an essentially linear flow resistor. An alternating flow of the fluid is superimposed on the volumetric fluid flow to be measured. Steady and alternating components of a pressure drop across the flow resistor are detected. A quantity representative of a property of the fluid is determined in response to the determined alternating component. The volumetric flow rate is calculated on the basis of the determined steady component and the quantity representing fluid property.

    Abstract translation: 流体的体积流量基本上独立于流体的性质确定，通过基本上线性的流动阻力器引导待测量的体积流体流。 流体的交替流动叠加在待测量的体积流体流上。 检测流过电阻器两端的压降的稳定和交替分量。 响应于所确定的交替分量来确定表示流体性质的量。 基于确定的稳定组分和表示流体性质的量计算体积流量。

    Automated flow measuring device including wet and dry bulb moisture analyzer
    85.
    发明授权
    Automated flow measuring device including wet and dry bulb moisture analyzer 失效
    自动流量测量装置，包括湿，干球水分仪

    公开(公告)号：US5520048A

    公开(公告)日：1996-05-28

    申请号：US375527

    申请日：1995-10-19

    Applicant: John E. Traina ,  Richard Myers

    Inventor： John E. Traina ,  Richard Myers

    IPC: G01F1/40 ,  G01F1/46 ,  G01N25/64 ,  G01N25/62 ,  G01F1/42

    CPC classification number: G01N25/64 ,  G01F1/40 ,  G01F1/46

    Abstract: An improved probe useful for measuring emissions of stack gases is equipped with a means for measuring moisture content and molecular weight of stack gases. A water feed tube is provided through the distal end of the probe and is fed water via a water feed line. An electrical temperature measuring device and water soaker device having spaced apart soaker feed holes is provided near the distal end of the water feed tube while a dry tubing encases the water feed tube below the temperature measuring device. A soaker wick encases part of the water feed tube and covers all of the temperature measuring device. Finally, an internal seal is provided between the dry tubing and the temperature measuring device to prevent thermally conductive heat from reaching the temperature measuring device. This structure enables the probe to make wet bulb-dry bulb measurements of stack gases.

    Abstract translation: 用于测量烟气排放的改进型探头配有测量烟气浓度和水分含量的方法。 供水管通过探头的远端提供，并通过给水管线供水。 在供水管的远端附近设置具有间隔开的进料孔的电气温度测量装置和水加湿装置，而干管将供水管包裹在温度测量装置下方。 一个较软的灯芯包住了供水管的一部分，并覆盖了所有的温度测量装置。 最后，在干管和温度测量装置之间提供内部密封，以防止热传导热到达温度测量装置。 这种结构使得探针能够对烟气进行湿球 - 干球测量。

    Mounting system for pressure transmitters
    86.
    发明授权
    Mounting system for pressure transmitters 失效
    压力变送器安装系统

    公开(公告)号：US5494071A

    公开(公告)日：1996-02-27

    申请号：US253764

    申请日：1994-06-03

    Applicant: Joel D. Bell ,  Alan F. Chou

    Inventor： Joel D. Bell ,  Alan F. Chou

    IPC: G01F1/34 ,  G01F1/40 ,  G01F15/18 ,  G01L19/00 ,  F16L23/00

    CPC classification number: G01F1/40 ,  G01F1/34 ,  G01F15/18 ,  G01F15/185 ,  G01L19/0007 ,  G01L19/0015 ,  Y10T137/87249 ,  Y10T137/87885

    Abstract: A mounting plate is disclosed that is adapted to be positioned between a main flow line and at least two differential pressure transmitters, to place the two differential pressure transmitters in fluid communication with a pair of pipeline taps on opposite sides of a flow reducing orifice plate in the main flow line is disclose. The mounting plate includes a plate-like body generally rectangular in cross section along its longitudinal axis and longer than it is wide along its transverse axis. The plate-like body includes a pair of ports that extend through the body and are in fluid communication with the pair of pressure taps with the longitudinal axis of the body parallel to the main flow line. A plurality of passageways or bores extend into the body to connect the ports to various combinations of pressure transmitters. One or more mounting holes for the transmitters are on a line that intersects the longitudinal axis of the body at an angle to allow some of the passageways or bores to be drilled straight and parallel to the longitudinal axis of the body between the mounting holes.In another embodiment, a sub plate is used to supply pressure to a third pressure transmitter. In another embodiment, a plate-like adapter, as well as the sub plate, is used to mount four differential transmitters or three differential pressure transmitters and a static pressure transmitter.

    Abstract translation: 公开了一种安装板，其适于定位在主流线和至少两个差压变送器之间，以将两个差压变送器放置在与减流孔板的相对侧上的一对管道龙头流体连通 主流线公开。 安装板包括沿着其纵向轴线的横截面大致矩形的板状体，并且沿着其横向轴线的宽度比其宽。 板状体包括一对延伸穿过主体并与主体的纵向轴线平行于主流线的一对压力分接头流体连通的端口。 多个通道或孔延伸到主体中，以将端口连接到压力变送器的各种组合。 用于发射器的一个或多个安装孔在与主体的纵向轴线成一定角度的线上，以允许一些通道或孔在安装孔之间直线钻孔并平行于主体的纵向轴线。 在另一个实施例中，子板用于向第三压力变送器供应压力。 在另一个实施例中，板状适配器以及副板用于安装四个差动变送器或三个差压变送器和静压变送器。

    Low turbulence airflow sensor
    87.
    发明授权
    Low turbulence airflow sensor 失效
    低湍流气流传感器

    公开(公告)号：US5481925A

    公开(公告)日：1996-01-09

    申请号：US303714

    申请日：1994-09-09

    Applicant: Ronald E. Woodbury

    Inventor： Ronald E. Woodbury

    IPC: G01F1/40 ,  G01F1/46

    CPC classification number: G01F1/46 ,  G01F1/40

    Abstract: An airflow sensor is designed with features which enhance the accuracy of measurement. The central hub of the airflow sensor is made in an air foil shape to reduce noise and turbulence at that region. The airflow sensing tubes extend radially outwardly from the central hub and are made extremely thin in profile to minimize turbulence. Each airflow sensing tube has a plurality of spaced airflow receiving openings therethrough which are spaced from one another in a manner permitting each opening to receive air from a volume of air equal to the volumes of air from which other holes receive air flow. The downstream air collection tubes are circumferentially spaced between the first-mentioned airflow sensing tubes and have open ends to receive air from the open areas between the first-mentioned airflow sensing tubes. The airflow sensor is designed to be mounted within a conduit of generally circular cross-section and the mounting devices which mount the outer ends of the tubes to the inner walls of the conduit have turbulence-reducing air foil shapes.

    Abstract translation: 气流传感器设计有提高测量精度的特征。 气流传感器的中心毂被制成空气箔形状，以减少该区域的噪音和湍流。 气流感测管从中心毂径向向外延伸并且被制成非常薄的轮廓以最小化湍流。 每个气流感测管具有多个间隔开的气流接收开口，每个气流接收开口彼此间隔开，以允许每个开口从等于其它孔接收空气流量的空气体积的空气体积接收空气。 下游空气收集管在第一个提到的气流感测管之间周向间隔开，并具有开口端，以从第一个气流感测管之间的开放区域接收空气。 气流传感器被设计成安装在通常为圆形横截面的导管中，并且将管的外端安装到导管的内壁的安装装置具有湍流减小的空气箔形状。

    Differential pressure sensor for respiratory monitoring
    89.
    发明授权
    Differential pressure sensor for respiratory monitoring 失效
    差压传感器用于呼吸监测

    公开(公告)号：US5379650A

    公开(公告)日：1995-01-10

    申请号：US111161

    申请日：1993-08-24

    Applicant: Scott A. Kofoed ,  Joseph A. Orr

    Inventor： Scott A. Kofoed ,  Joseph A. Orr

    IPC: G01F1/36 ,  G01F1/40 ,  G01F1/46 ,  G01F1/50 ,  A61B5/087

    CPC classification number: G01F1/363 ,  G01F1/40 ,  G01F1/46 ,  G01F1/50

    Abstract: A differential pressure sensor for measuring respiratory gas flow including a tubular housing containing a diametrically-oriented, longitudinally extending strut containing first and second lumens having longitudinally-spaced pressure ports opening into respective axially-located notches at each end of the strut.

    Abstract translation: 一种用于测量呼吸气流的差压传感器，包括管状壳体，该管状壳体包含沿径向定向的纵向延伸的支柱，其包含第一和第二管腔，所述第一和第二管腔具有纵向隔开的压力端口，所述压力端口在支柱的每个端部处开口到相应的轴向定位的切口。

    Method and apparatus for determining characteristics of fluid flow
    90.
    发明授权
    Method and apparatus for determining characteristics of fluid flow 失效
    用于确定流体流动特性的方法和装置

    公开(公告)号：US5363699A

    公开(公告)日：1994-11-15

    申请号：US112756

    申请日：1993-08-25

    Applicant: Floyd McCall

    Inventor： Floyd McCall

    IPC: F15D1/02 ,  G01F1/00 ,  G01F1/10 ,  G01F1/11 ,  G01F1/12 ,  G01F1/36 ,  G01F1/40 ,  G01F1/86 ,  G01F15/00 ,  G01F15/02

    CPC classification number: G01F15/00 ,  F15D1/02 ,  G01F1/10 ,  G01F1/11 ,  G01F1/12 ,  G01F1/36 ,  G01F1/40 ,  G01F1/86 ,  G01F15/022

    Abstract: Highly reliable measurements of the fluid and/or fluid flow in a conduit are obtained by insertion within the conduit, upstream of a fluid measuring or sampling device, of a fluid flow straigntening and displacement apparatus which serves to stabilize, homogenize and condition the fluid flow and form at the device a uniform, axially centered, axially symmetrical, well defined and accurately measurable flow profile of large means flow diameter. The flow straightening and fluid displacement apparatus comprises, in sequence in the direction of fluid flow, a first swirl mitigating and flow straightening device, a fluid displacement member comprised of two oppositely facing frustums jointed at their larger ends and mounted coaxially within the conduit, and a second flow straightening device. Advantageous combinations of the flow straightening and fluid displacement apparatus with known measuring and sampling devices are provided.

    Abstract translation: 通过在流体测量或取样装置的上游的导管内插入用于稳定，均匀化和调节流体流动的流体流动和排出装置来获得导管中流体和/或流体流动的高度可靠的测量 并且在该装置处形成具有大的平均流动直径的均匀的，轴向居中的，轴对称的，良好限定的和精确可测量的流动廓线。 流动矫直和流体置换装置依次包括流体流动的方向，第一涡流减轻和流动矫正装置，流体移动构件，其包括在其较大端部处接合并同轴地安装在管道内的两个相对面的截头圆锥体，以及 第二流动矫直装置。 提供了具有已知测量和取样装置的流动矫正和流体置换装置的有利组合。

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