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公开(公告)号：US20120222494A1
公开(公告)日：2012-09-06
申请号：US13039698
申请日：2011-03-03
IPC分类号： G01F1/37
CPC分类号： G01F1/36 , G01F1/50 , G01F25/0007
摘要： A system for measuring flow of process fluid through process piping in an industrial process includes a flow restriction element in the process pipe. A first differential pressure transmitter is configured to measure a first differential pressure across the flow restriction element in response to flow of process fluid. A second differential pressure transmitter configured to measure a second differential pressure in the process fluid across the flow restriction element. Circuitry performs diagnostics based upon the first differential pressure and the second differential pressure.
摘要翻译： 用于测量在工业过程中通过工艺管道的工艺流体流动的系统包括处理管中的流动限制元件。 第一差压变送器构造成响应于过程流体的流动来测量横跨流量限制元件的第一差压。 第二差压变送器被配置为测量横跨流量限制元件的过程流体中的第二差压。 电路根据第一差压和第二压差执行诊断。
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公开(公告)号：US07996161B2
公开(公告)日：2011-08-09
申请号：US12323863
申请日：2008-11-26
CPC分类号： G01L19/00
摘要： A process fluid pressure transmitter includes a process fluid pressure sensor, measurement circuitry, a controller and a loop communicator. The pressure sensor is coupleable to a source of process fluid pressure. Measurement circuitry is coupled to the process fluid pressure sensor and provides a signal indicative of the electrical characteristic of the process fluid pressure sensor. The controller receives the signal from the measurement circuitry and calculates a process fluid pressure based at least in part upon the signal. The controller is also configured to detect a process fluid pressure transient and store at least one parameter related to the process fluid pressure transient. The loop communicator is coupled to the controller and is configured to provide a signal over a process communication loop based upon the process fluid pressure. The process fluid pressure transmitter is also configured to provide an indication related to the at least one stored parameter.
摘要翻译： 过程流体压力变送器包括过程流体压力传感器，测量电路，控制器和回路通信器。 压力传感器可与过程流体压力源连接。 测量电路耦合到过程流体压力传感器并且提供指示过程流体压力传感器的电特性的信号。 控制器接收来自测量电路的信号，并且至少部分地基于该信号来计算过程流体压力。 控制器还被配置为检测过程流体压力瞬态并存储与过程流体压力瞬态相关的至少一个参数。 环路通信器耦合到控制器，并且被配置为基于过程流体压力在过程通信回路上提供信号。 过程流体压力变送器还被配置为提供与至少一个存储的参数有关的指示。
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公开(公告)号：US20100274528A1
公开(公告)日：2010-10-28
申请号：US12386760
申请日：2009-04-22
IPC分类号： G06F15/00
CPC分类号： G05B19/0428 , G05B23/0221 , G05B2219/25428 , G05B2219/37008
摘要： A field device includes a sensor for sensing a process parameter, a processor for producing a measurement value as a function of the sensed process parameter, and a communication interface for transmitting an output based upon the measurement value. The processor also calculates a measurement precision value associated with the measurement value.
摘要翻译： 现场设备包括用于感测过程参数的传感器，用于产生作为感测到的过程参数的函数的测量值的处理器，以及用于基于测量值发送输出的通信接口。 处理器还计算与测量值相关联的测量精度值。
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公开(公告)号：US20090139346A1
公开(公告)日：2009-06-04
申请号：US12323863
申请日：2008-11-26
CPC分类号： G01L19/00
摘要： A process fluid pressure transmitter includes a process fluid pressure sensor, measurement circuitry, a controller and a loop communicator. The process fluid pressure sensor has an electrical characteristic that varies with process fluid pressure. The pressure sensor is coupleable to a source of process fluid pressure. The measurement circuitry is coupled to the process fluid pressure sensor and provides a signal indicative of the electrical characteristic of the process fluid pressure sensor. The controller is coupled to the measurement circuitry and receives the signal and calculates a process fluid pressure based at least in part upon the signal. The controller is also configured to detect a process fluid pressure transient and store at least one parameter related to the process fluid pressure transient. The loop communicator is coupled to the controller and is configured to provide a signal over a process communication loop based upon the process fluid pressure. The process fluid pressure transmitter is also configured to provide an indication related to the at least one stored parameter.
摘要翻译： 过程流体压力变送器包括过程流体压力传感器，测量电路，控制器和回路通信器。 过程流体压力传感器具有随过程流体压力而变化的电特性。 压力传感器可与过程流体压力源连接。 测量电路耦合到过程流体压力传感器并且提供指示过程流体压力传感器的电特性的信号。 控制器耦合到测量电路并且接收信号并且至少部分地基于该信号来计算过程流体压力。 控制器还被配置为检测过程流体压力瞬态并存储与过程流体压力瞬态相关的至少一个参数。 环路通信器耦合到控制器，并且被配置为基于过程流体压力在过程通信回路上提供信号。 过程流体压力变送器还被配置为提供与至少一个存储的参数有关的指示。
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公开(公告)号：US06611775B1
公开(公告)日：2003-08-26
申请号：US09576719
申请日：2000-05-23
IPC分类号： G01F160
CPC分类号： G01D3/032 , G01D3/0365 , G01F1/58 , G01F1/60 , G01F25/0007
摘要： A magnetic flow meter has a diagnostic circuit that indicates leakage from flowtube electrodes. The diagnostic circuit couples to the electrodes and to ground. The diagnostic circuit samples diagnostic potentials between each electrode and ground, and then generates a sum of the diagnostic potentials between a first and a second electrode that indicates the leakage. The flowtube includes an insulated tube and an electromagnet. A transmitter circuit couples to the electromagnet and electrodes, and then generates a transmitter output representing a flow rate, which can be corrected for the leakage.
摘要翻译： 磁流量计具有指示来自流管电极的泄漏的诊断电路。 诊断电路耦合到电极和接地。 诊断电路对每个电极和地面之间的诊断电位进行采样，然后产生指示泄漏的第一和第二电极之间的诊断电位之和。 流量计包括绝缘管和电磁体。 发射器电路耦合到电磁体和电极，然后产生表示流量的发射器输出，其可以针对泄漏进行校正。
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公开(公告)号：US06611770B1
公开(公告)日：2003-08-26
申请号：US09578279
申请日：2000-05-25
IPC分类号： G01F158
CPC分类号： G01D3/032 , G01D3/0365 , G01F1/58 , G01F1/60 , G01F25/0007
摘要： A magnetic flowmeter with an improved liquid conduction indication has a flowtube assembly with a passage for liquid flow and has an electromagnet mounted outside the passage that provides ramped magnetic excitation. An electrode circuit couples through the passage and generates ramp spikes and a flow signal. A processor receiving the flow signal and generating a flow rate output. The processor also receives the ramp spikes and generates a filtered integral of the ramp spikes as a liquid conduction or empty pipe indication.
摘要翻译： 具有改进的液体传导指示的磁流量计具有流管组件，其具有用于液体流动的通道，并且具有安装在通道外部的电磁体，其提供斜坡磁激励。 电极电路通过通道耦合并产生斜坡尖峰和流动信号。 接收流量信号并产生流量输出的处理器。 处理器还接收斜坡尖峰，并产生斜坡尖峰的滤波积分作为液体导通或空管指示。
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公开(公告)号：US08448525B2
公开(公告)日：2013-05-28
申请号：US13039698
申请日：2011-03-03
IPC分类号： G01F1/37
CPC分类号： G01F1/36 , G01F1/50 , G01F25/0007
摘要： A system for measuring flow of process fluid through process piping in an industrial process includes a flow restriction element in the process pipe. A first differential pressure transmitter is configured to measure a first differential pressure across the flow restriction element in response to flow of process fluid. A second differential pressure transmitter configured to measure a second differential pressure in the process fluid across the flow restriction element. Circuitry performs diagnostics based upon the first differential pressure and the second differential pressure.
摘要翻译： 用于测量在工业过程中通过工艺管道的工艺流体流动的系统包括处理管中的流动限制元件。 第一差压变送器构造成响应于过程流体的流动来测量横跨流量限制元件的第一差压。 第二差压变送器被配置为测量横跨流量限制元件的过程流体中的第二差压。 电路根据第一差压和第二压差执行诊断。
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18.发明申请公开(公告)号：US20110010120A1
公开(公告)日：2011-01-13
申请号：US12832341
申请日：2010-07-08
CPC分类号： G01D21/00 , G05B19/0423 , G05B2219/24069
摘要： A two-wire process variable transmitter for use in an industrial process, including a process variable sensor configured to sense a process variable of a fluid of the industrial process. Output circuitry is configured to provide an output on a two-wire process control loop which is related to the sensed process variable. Loop current measurement circuitry measures a loop current flowing through the two-wire process control loop and terminal voltage measurement circuitry measures a voltage related to a terminal voltage of the process variable transmitter. The terminal voltage can be a voltage measured across an electrical connection of the two-wire process variable transmitter to the two-wire process control loop. Input circuitry is configured to receive a diagnostic command from the two-wire process control loop. A microprocessor configured to perform loop diagnostics on the two-wire process control loop based upon the measured loop current and terminal voltage in response to receipt of a diagnostic command from the two-wire process control loop.
摘要翻译： 一种用于工业过程的二线过程变量变送器，包括被配置为感测工业过程流体的过程变量的过程变量传感器。 输出电路被配置为在与所感测的过程变量相关的二线过程控制回路上提供输出。 回路电流测量电路测量流过两线制过程控制回路的回路电流，并且端子电压测量电路测量与过程变量变送器的端子电压相关的电压。 端子电压可以是两线制过程变量发射机与两线制过程控制回路的电气连接测量的电压。 输入电路配置为从两线制过程控制回路接收诊断命令。 该微处理器被配置为响应于从两线制过程控制回路接收到诊断命令，基于所测量的回路电流和端子电压在两线制过程控制回路上执行循环诊断。
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公开(公告)号：US07680549B2
公开(公告)日：2010-03-16
申请号：US11397319
申请日：2006-04-04
IPC分类号： G05B11/01
CPC分类号： C10G11/187 , G05B23/0221 , G05B23/024
摘要： A device for diagnosing operation of an industrial process control or monitoring system includes an input configured to receive an input related to a process signal. A first statistical parameter module provides a first statistical parameter output related to a statistical parameter of the process signal. A filter provides a filter output related to a filtered value of the process signal. A second statistical parameter module provides a second statistical parameter output related to a statistical parameter of the filter output. A diagnostic module diagnoses operation of the industrial process based upon the first and second statistical parameters.
摘要翻译： 用于诊断工业过程控制或监视系统的操作的设备包括被配置为接收与过程信号相关的输入的输入。 第一统计参数模块提供与过程信号的统计参数相关的第一统计参数输出。 过滤器提供与过程信号的过滤值相关的过滤器输出。 第二统计参数模块提供与过滤器输出的统计参数相关的第二统计参数输出。 诊断模块基于第一和第二统计参数诊断工业过程的操作。
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20.发明授权Magnetic flow meter with unibody construction and conductive polymer electrodes 有权具有单体结构和导电聚合物电极的磁流量计公开(公告)号：US07343817B2
公开(公告)日：2008-03-18
申请号：US11807996
申请日：2007-05-31
申请人： David L. Wehrs , Robert T. Chinnock
发明人： David L. Wehrs , Robert T. Chinnock
IPC分类号： G01F1/58
摘要： A magnetic flow metering device and method is disclosed for the measurement of corrosive flow streams. The device utilizes a unibody construction wherein the flow conduit is constructed entirely from an insulative, non-conducting material without resorting to a metallic outer housing. The portions of the electrodes in contact with the flow stream are made of a suitable conductive polymer material, resistant to the corrosive media. The electrodes also feature shields that are molded into the electrode assembly to reduce background electrical noise. The invention also utilizes an electrical configuration that actively drives the electrode shield circuit (electrodes as well as cabling) to provide a more accurate measurement of the electromotive force.
摘要翻译： 公开了一种用于测量腐蚀性流动的流量计量装置和方法。 该装置使用一体式结构，其中流动管道完全由绝缘的非导电材料构成，而不借助金属外壳体。 电极与流动流接触的部分由合适的导电聚合物材料制成，耐腐蚀性介质。 电极还具有模制到电极组件中以减少背景电噪声的屏蔽。 本发明还利用主动驱动电极屏蔽电路（电极以及布线）以提供更准确的电动势测量的电气结构。
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