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    Differential pressure transmitter, a square root extractor device therefor and methods of making the same
    2.
    发明授权
    Differential pressure transmitter, a square root extractor device therefor and methods of making the same 失效
    差压变送器，平方根抽取装置及其制作方法

    公开(公告)号：US4833924A

    公开(公告)日：1989-05-30

    申请号：US114789

    申请日：1987-10-30

    申请人： Clarence M. Asbill, III

    发明人： Clarence M. Asbill, III

    IPC分类号： G01F1/36 ,  G01F1/38 ,  G01F1/50

    CPC分类号： G01F1/50 ,  G01F1/366 ,  G01F1/386

    摘要： A differential pressure transmitter, a pneumatically operated square root extracting device therefor and methods of making the same are provided, the transmitter comprising a unit for producing an output pneumatic signal from a pneumatic source in relation to the air velocity pressure of air flowing in a passage, a unit that senses the difference between the total pressure and the static pressure of the air flowing in the passage, and a unit for extracting the square root of the air velocity pressure of the air from the pneumatic output signal as the pneumatic output signal is being produced so that the pneumatic output signal is substantially linear with respect to the air velocity of the air flow in the passage whereby the transmitter comprises a linear air velocity transmitter, the unit for extracting the square root comprising a cam having a cam face that defines at least part of the involute of a circle.

    摘要翻译： 提供了一种差压变送器，气动平方根提取装置及其制造方法，该变送器包括用于从气动源产生输出气动信号的单元，该单元相对于在通道中流动的空气的空气速度压力 ，用于感测在通道中流动的空气的总压力和静压之间的差异的单元，以及用于从气动输出信号提取空气的空气速度压力的平方根的单元作为气动输出信号 被产生，使得气动输出信号相对于通道中的空气流的空气速度基本上是线性的，由此变送器包括线性空气速度变送器，用于提取平方根的单元包括具有凸轮面的凸轮，凸轮面定义 至少部分渐开线一圈。

    Flow Metering
    7.
    发明申请
    Flow Metering 审中-公开
    流量计

    公开(公告)号：US20160238423A1

    公开(公告)日：2016-08-18

    申请号：US15027039

    申请日：2014-09-24

    申请人： Western Energy Support & Technology, Inc. ,  DP Diagnostics LLC

    发明人： Richard Steven ,  Terrence Cousins ,  Jerry Caldwell

    IPC分类号： G01F1/74 ,  G01F1/36

    CPC分类号： G01F1/74 ,  G01F1/366

    摘要： Methods and apparatus for the metering of two-component, single-phase fluid flow. A primary element of a differential pressure flow meter is used as a joint mixer and flow meter. Diagnostic techniques can be applied to detect and help determine the cause of erroneous meter readings. A volume meter can also be provided downstream of the differential pressure meter, and the respective outputs can be cross-referenced to produce a mass flow rate, volume flow rate and density output with no prior knowledge of fluid density required.

    摘要翻译： 用于计量双组分单相流体流量的方法和装置。 差压流量计的主要元件用作联合混合器和流量计。 可以应用诊断技术来检测并帮助确定错误仪表读数的原因。 也可以在差压表的下游设置体积计，并且可以将各个输出交叉参考，以产生质量流率，体积流量和密度输出，而不需要事先知道的流体密度。

    Nozzle pitot averaging primary
    8.
    发明授权
    Nozzle pitot averaging primary 失效
    喷嘴皮托平均主要

    公开(公告)号：US4372171A

    公开(公告)日：1983-02-08

    申请号：US196184

    申请日：1980-10-14

    申请人： Robert O. Brandt, Jr.

    发明人： Robert O. Brandt, Jr.

    IPC分类号： G01F1/36 ,  G01F1/46

    CPC分类号： G01F1/366 ,  G01F1/46

    摘要： A nozzle pitot primary for effectively sensing and measuring differential or velocity pressure of a system of air or gas flowing within a duct or conduit. By determining differential or velocity pressure, it is appreciated that the air or gas flow can be readily determined. The nozzle pitot primary of the present invention comprises a nozzle designed to be installed within a duct or conduit with the nozzle including a constricting throat area relative to the duct or conduit in which the same is installed. Air or gas passing through the duct or conduit is directed through the nozzle so as to produce a generally uniform and predictable velocity profile within the nozzle downstream from the throat area therein. An array of static and total pressure pitots are provided in association with the nozzle and are spaced inwardly across a constricted area where the velocity profile is relatively uniform. Because of the relative uniform velocity profile about the area of the pitots, it follows that an accurate indication of fluid flow can be determined without the necessity of sensing differential pressure at multiple points across the nozzle's cross sectional area.

    摘要翻译： 用于有效地感测和测量在管道或管道内流动的空气或气体系统的差速或速度压力的喷嘴皮托管。 通过确定差速或速度压力，可以理解，可以容易地确定空气或气体流。 本发明的喷嘴皮托管包括设计成安装在管道或管道内的喷嘴，喷嘴包括相对于其中安装相同的管道或导管的收缩喉部区域。 通过管道或导管的空气或气体被引导通过喷嘴，以便在其内的喉部区域下游的喷嘴内产生大致均匀且可预测的速度分布。 与喷嘴相关联地提供静压和总压力柱的阵列，并且在速度分布相对均匀的收缩区域内部间隔开。 由于关于皮托区域的相对均匀的速度分布，可以确定流体流动的精确指示，而不需要在喷嘴的横截面积上的多个点处感测压差。