PROCESS VARIABLE TRANSMITTER WITH SELF-LEARNING LOOP DIAGNOSTICS

    公开(公告)号:US20170093533A1

    公开(公告)日:2017-03-30

    申请号:US14871850

    申请日:2015-09-30

    Applicant: Rosemount Inc.

    Abstract: A two-wire process variable transmitter for use in an industrial process includes a process variable sensor configured to sense a process variable of a process fluid of the industrial process. Output circuitry provides an output on a two-wire process control loop which is related to the sensed process variable. Terminal voltage measurement circuitry measures a voltage at terminals of the process variable transmitter. The terminal voltage is a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. A microprocessor performs loop diagnostics on the two-wire process control loop based upon a loop current and the measured terminal voltage. The microprocessor determines coefficients of a polynomial equation which relates loop current and terminal voltage during normal operation of the two-wire process variable transmitter and performs subsequent diagnostics based upon the coefficients of the polynomial.

    Terminal feedthrough
    303.
    发明授权
    Terminal feedthrough 有权
    终端馈通

    公开(公告)号:US09590400B2

    公开(公告)日:2017-03-07

    申请号:US14718681

    申请日:2015-05-21

    Applicant: Rosemount Inc.

    CPC classification number: H02G3/0412 H01R13/5202 H01R13/533 H02G3/0437

    Abstract: A terminal feedthrough is provided. The terminal feedthrough includes a terminal pin insert having a pair of ends. A polymeric body having an externally threaded region is disposed about the terminal pin insert to form an interface with the terminal pin insert. At least one of threads of the externally threaded region and a cylindrical pin interface is configured to provide a flame-quenching pathway.

    Abstract translation: 提供终端馈通。 端子馈通包括具有一对端部的端子插脚。 具有外螺纹区域的聚合物主体设置在端子销插入件周围以形成与端子销插入件的界面。 外螺纹区域和圆柱形销接口的至少一个螺纹被构造成提供阻燃路径。

    CORRECTION OF NATURAL GAS FLOW CALCULATIONS FOR THE EFFECTS OF WATER VAPOR
    305.
    发明申请
    CORRECTION OF NATURAL GAS FLOW CALCULATIONS FOR THE EFFECTS OF WATER VAPOR 审中-公开
    天然气流量计算对水汽的影响的校正

    公开(公告)号:US20170023393A1

    公开(公告)日:2017-01-26

    申请号:US15216871

    申请日:2016-07-22

    Applicant: Rosemount Inc.

    CPC classification number: G01F15/022 G01F1/50 G01F1/74 G01F1/88 G01F15/04

    Abstract: A system for measuring concentration of water vapor in a gas includes a pressure sensor configured to sense a static pressure of the gas and a differential pressure sensor configured to sense a differential pressure. A temperature sensor senses a temperature of the gas. Circuitry estimates determines a concentration of water vapor in the gas based upon the measured pressures and temperature.

    Abstract translation: 用于测量气体中水蒸气浓度的系统包括被配置为感测气体的静压力的压力传感器和构造成感测压差的差压传感器。 温度传感器检测气体的温度。 电路估计根据测量的压力和温度确定气体中的水蒸气浓度。

    Detection of position of a plunger in a well
    306.
    发明授权
    Detection of position of a plunger in a well 有权
    检测井中柱塞的位置

    公开(公告)号:US09534491B2

    公开(公告)日:2017-01-03

    申请号:US14039625

    申请日:2013-09-27

    Applicant: Rosemount Inc.

    CPC classification number: E21B47/09 E21B43/121 E21B47/0007 E21B47/06

    Abstract: A system for detecting when a plunger reaches a bottom of a well includes a pressure sensor configured to measure a pressure of the well and provide a measured pressure output. Derivative calculation circuitry calculates a derivative of the measured pressure output. Detection circuitry detects when the plunger reaches the bottom of the well based upon the calculated derivative.

    Abstract translation: 用于检测柱塞到达井的底部的系统包括被配置为测量井的压力并提供测量的压力输出的压力传感器。 微分计算电路计算测得的压力输出的导数。 检测电路根据计算出的导数,检测柱塞是否到达井底。

    PROCESS VARIABLE MEASUREMENT AND LOCAL DISPLAY WITH MULTIPLE RANGES
    307.
    发明申请
    PROCESS VARIABLE MEASUREMENT AND LOCAL DISPLAY WITH MULTIPLE RANGES 有权
    过程可变的测量和多个范围的本地显示

    公开(公告)号:US20160377498A1

    公开(公告)日:2016-12-29

    申请号:US14751754

    申请日:2015-06-26

    Applicant: Rosemount Inc.

    Inventor: Robert C. Hedtke

    CPC classification number: G01L19/10 G01D13/26 G01K1/028 G01L19/16

    Abstract: A process variable indicator is provided. The process variable indicator includes a process variable sensor having an electrical characteristic that varies with the process variable. Measurement circuitry is coupled to the process variable sensor and is configured to provide an indication relative to the electrical characteristic. A processor is coupled to the measurement circuitry and is configured to compute a process variable based on the indication and determine, among a plurality of ranges, which range the process variable is within. The processor generates a local visual output based on the process variable and the determined range. A method of visually indicating a process variable is also provided.

    Abstract translation: 提供过程变量指示器。 过程变量指示器包括具有根据过程变量而变化的电特性的过程变量传感器。 测量电路耦合到过程变量传感器并且被配置为提供相对于电特性的指示。 处理器耦合到所述测量电路,并且被配置为基于所述指示来计算过程变量,并且在多个范围内确定所述过程变量在其中的范围。 处理器基于过程变量和确定的范围生成局部视觉输出。 还提供了可视地指示过程变量的方法。

    Infrared sensor
    309.
    发明授权
    Infrared sensor 有权
    红外传感器

    公开(公告)号:US09470580B2

    公开(公告)日:2016-10-18

    申请号:US14037963

    申请日:2013-09-26

    Applicant: Rosemount Inc.

    Inventor: Jason Harold Rud

    CPC classification number: G01J5/12 G01J5/06 G01J5/14 G01J5/22 G01J2005/068

    Abstract: An infrared sensor includes a thermopile connected in series with an ambient temperature compensation resistance temperature detector (RTD) and four electrical leads. The thermopile produces a voltage as a function of temperature of a point of interest, while the RTD varies in resistance as a function of ambient temperature. Two of the leads deliver current to energize the RTD. The other two leads are used for sensing voltages produced by the thermopile and the RTD.

    Abstract translation: 红外传感器包括与环境温度补偿电阻温度检测器(RTD)和四个电引线串联连接的热电堆。 热电堆产生作为感兴趣点的温度的函数的电压,而RTD随着环境温度的变化而变化。 两条引线提供了电流来激励RTD。 另外两根引线用于感应由热电堆和RTD产生的电压。

    CAPILLARY CONNECTION THROUGH WALL PENETRATION
    310.
    发明申请
    CAPILLARY CONNECTION THROUGH WALL PENETRATION 有权
    通过墙壁渗透进行毛细连接

    公开(公告)号:US20160290533A1

    公开(公告)日:2016-10-06

    申请号:US14672681

    申请日:2015-03-30

    Applicant: Rosemount Inc.

    Abstract: A remote seal connection includes an outer sleeve, configured to be inserted through a penetration in a wall and having an outer surface. A capillary is within the outer sleeve and carries a fluid configured to communicate a pressure from a remote seal to a pressure transmitter. A space is provided about the capillary and is positioned between the capillary and the outer sleeve.

    Abstract translation: 远程密封连接包括外套筒,其构造成通过壁中的穿透插入并具有外表面。 毛细管位于外套管内,并承载配置成将来自远程密封件的压力传递到压力变送器的流体。 围绕毛细管设置一个空间并位于毛细管和外套管之间。

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