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公开(公告)号：US5963147A
公开(公告)日：1999-10-05
申请号：US897523
申请日：1997-07-21
申请人： Brian L. Westfield , Stephen D. Anderson , Bennett L. Louwagie , Todd A. Piechowski , Gregory C. Brown
发明人： Brian L. Westfield , Stephen D. Anderson , Bennett L. Louwagie , Todd A. Piechowski , Gregory C. Brown
IPC分类号： G05B11/36 , G05B19/042 , G05B19/418 , H04L25/02 , G08C19/04
CPC分类号： G05B19/0423 , G05B19/4185 , G05B2219/25189 , G05B2219/25191 , G05B2219/31121 , G05B2219/31126 , G05B2219/31135 , G05B2219/33197 , Y02P90/18
摘要： Conversion circuitry for use in a process control system is adapted for coupling to a primary process control loop. Digital receiver circuitry in the conversion circuitry receives a digital signal transmitted over the primary process control loop from a field transmitter and responsively provides a digital output. A microprocessor receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry for coupling to a secondary process control loop receives the secondary loop control output from the microprocessor and responsively controls current flowing through the secondary process control loop. The current flowing through the secondary process control loop is related to the digital signal transmitted by the field transmitter.
摘要翻译： 用于过程控制系统的转换电路适于耦合到主过程控制回路。 转换电路中的数字接收机电路接收从现场发射机通过主过程控制回路传输的数字信号，并且响应地提供数字输出。 微处理器接收数字输出并且响应地提供辅助回路控制输出。 用于耦合到次级过程控制回路的二次回路控制电路接收来自微处理器的次级回路控制输出，并且响应地控制流过次级过程控制回路的电流。 流过次级过程控制回路的电流与现场发射机发射的数字信号有关。
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公开(公告)号：US09823276B2
公开(公告)日：2017-11-21
申请号：US13816333
申请日：2012-05-29
CPC分类号： G01R19/0092 , G01R19/2509 , G01R31/2829 , G05B19/0425 , G05B23/0235 , G05B2219/25428 , G05B2219/33197 , G05B2219/33331 , G08C19/02 , H04Q9/00 , H04Q2209/823
摘要： Some embodiments are directed to a process device comprising a process variable sensor configured to generate an output signal indicative of a sensed process variable; loop current output circuitry configured to control a loop current on a two wire process control loop to a value based on the output signal; loop current measurement circuitry coupled to the process control loop and configured to generate a measured loop current value based on the loop current; and loop current verification circuitry configured to approximate the loop current value based on the output signal and properties of a low pass filter, and generate a diagnostic signal based on a comparison of the approximated loop current value and the measured loop current value.
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公开(公告)号：US20070024428A1
公开(公告)日：2007-02-01
申请号：US11492434
申请日：2006-07-25
申请人： Kurt Polzer
发明人： Kurt Polzer
IPC分类号： G05B11/01
CPC分类号： G05B19/4185 , G05B19/0425 , G05B2219/25132 , G05B2219/25191 , G05B2219/25428 , G05B2219/31121 , G05B2219/33197 , Y02P90/18 , Y02P90/22
摘要： Field devices are commonly used in unprotected environments, which means that these field devices and the conductor pairs connecting the field devices to the input modules/output modules of an automation installation are exposed to significant climatic and environmental factors. These factors have a detrimental effect on the transmission quality of the signals to be transferred between field devices and modules, which may result in erroneous measurements and dangerous operating states during control of a technical process. Measures to simplify monitoring of the transmission medium are proposed.
摘要翻译： 现场设备通常用于未受保护的环境中，这意味着这些现场设备和将现场设备连接到自动化设备的输入模块/输出模块的导体对将暴露于显着的气候和环境因素。 这些因素对现场设备和模块之间要传输的信号的传输质量有不利影响，这可能导致在技术过程控制期间的错误测量和危险的操作状态。 提出了简化传输介质监控的措施。
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公开(公告)号：US07018800B2
公开(公告)日：2006-03-28
申请号：US10635944
申请日：2003-08-07
CPC分类号： G01R19/2509 , G01R19/2506 , G05B23/0235 , G05B2219/33197 , G08C19/02 , Y02P90/86
摘要： A process device for use on an industrial process control system includes a quiescent current sensor configured to sense quiescent current draw of the process device. Diagnostic circuitry determines a diagnostic condition of the process device as a function of the sensed quiescent current.
摘要翻译： 用于工业过程控制系统的过程装置包括被配置为感测过程装置的静态电流消耗的静态电流传感器。 诊断电路根据感测的静态电流确定过程设备的诊断状态。
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公开(公告)号：US06480131B1
公开(公告)日：2002-11-12
申请号：US09636152
申请日：2000-08-10
IPC分类号： H03M112
CPC分类号： G05B19/4142 , G05B19/0423 , G05B2219/31121 , G05B2219/31126 , G05B2219/33197 , G05B2219/34309
摘要： A two-wire industrial process control transmitter includes a sensor, at least two integrated circuits, and a level shift circuit. The first integrated circuit contains the analog measurement circuit that includes a sensor detection circuit and the analog portion of a digital-to-analog convertor. The second integrated circuit contains the digital system circuit that includes a modem and the digital portion of the analog-to-digital convertor. The first and second ICs may be powered at different voltage levels to maximize the power of the analog circuit and improve resolution. Alternatively, the ICs may be powered at the same voltage level, but the digital circuits are divided among several stacked dies to minimize the voltage for each digital circuit. In either case, the level shifting circuit shifts the voltage level between the analog and digital circuits.
摘要翻译： 双线工业过程控制发射机包括传感器，至少两个集成电路和电平移位电路。 第一集成电路包含模拟测量电路，其包括传感器检测电路和数模转换器的模拟部分。 第二集成电路包含数字系统电路，其包括调制解调器和模拟 - 数字转换器的数字部分。 第一和第二IC可以以不同的电压电平供电，以最大化模拟电路的功率并提高分辨率。 或者，IC可以以相同的电压电平供电，但是数字电路在几个堆叠的管芯之间分开，以使每个数字电路的电压最小化。 在任一情况下，电平移位电路使模拟和数字电路之间的电压电平移位。
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公开(公告)号：US5650777A
公开(公告)日：1997-07-22
申请号：US479801
申请日：1995-06-07
IPC分类号： G05B11/36 , G05B19/042 , G05B19/418 , H04L25/02 , G08C19/36
CPC分类号： G05B19/0423 , G05B19/4185 , G05B2219/25189 , G05B2219/25191 , G05B2219/31121 , G05B2219/31126 , G05B2219/31135 , G05B2219/33197 , Y02P90/18
摘要： Conversion circuitry for use in a process control system is adapted for coupling to a primary process control loop. Digital receiver circuitry in the conversion circuitry receives a digital signal transmitted over the primary process control loop from a field transmitter and responsively provides a digital output. A microprocessor receives the digital output and responsively provides a secondary loop control output. Secondary loop control circuitry for coupling to a secondary process control loop receives the secondary loop control output from the microprocessor and responsively controls current flowing through the secondary process control loop. The current flowing through the secondary process control loop is related to the digital signal transmitted by the field transmitter.
摘要翻译： 用于过程控制系统的转换电路适于耦合到主过程控制回路。 转换电路中的数字接收机电路接收从现场发射机通过主过程控制回路传输的数字信号，并且响应地提供数字输出。 微处理器接收数字输出并且响应地提供辅助回路控制输出。 用于耦合到次级过程控制回路的二次回路控制电路接收来自微处理器的次级回路控制输出，并且响应地控制流过次级过程控制回路的电流。 流过次级过程控制回路的电流与现场发射机发射的数字信号有关。
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公开(公告)号：US20130325381A1
公开(公告)日：2013-12-05
申请号：US13816333
申请日：2012-05-29
IPC分类号： G01R19/00
CPC分类号： G01R19/0092 , G01R19/2509 , G01R31/2829 , G05B19/0425 , G05B23/0235 , G05B2219/25428 , G05B2219/33197 , G05B2219/33331 , G08C19/02 , H04Q9/00 , H04Q2209/823
摘要： Some embodiments are directed to a process device comprising a process variable sensor configured to generate an output signal indicative of a sensed process variable; loop current output circuitry configured to control a loop current on a two wire process control loop to a value based on the output signal; loop current measurement circuitry coupled to the process control loop and configured to generate a measured loop current value based on the loop current; and loop current verification circuitry configured to approximate the loop current value based on the output signal and properties of a low pass filter, and generate a diagnostic signal based on a comparison of the approximated loop current value and the measured loop current value.
摘要翻译： 一些实施例涉及包括被配置为生成指示感测的过程变量的输出信号的过程变量传感器的过程设备; 环路电流输出电路被配置为基于输出信号将两线制过程控制回路上的回路电流控制到一个值; 环路电流测量电路耦合到过程控制回路并且被配置为基于回路电流产生测量的回路电流值; 以及环路电流验证电路，其被配置为基于低通滤波器的输出信号和特性来近似环路电流值，并且基于近似环路电流值与测量的环路电流值的比较来生成诊断信号。
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公开(公告)号：US20120248896A1
公开(公告)日：2012-10-04
申请号：US13418823
申请日：2012-03-13
申请人： Kouji Okuda
发明人： Kouji Okuda
IPC分类号： H01H47/00
CPC分类号： G05B19/4185 , G05B2219/31121 , G05B2219/33197 , G05B2219/34312 , Y02P90/18 , Y10T307/865
摘要： A switch is provided in a supply line for an operating power supply from an operating power supply generating circuit to a main circuit, An electric current detecting circuit and a comparison evaluating circuit are provided as a controlling circuit portion for controlling the ON/OFF state of the switch. The electric current detecting circuit inputs a voltage in accordance with the value of an electric current supplied from an higher-level system, and inverts and amplifies the voltage to produce an output voltage. The comparison evaluating circuit inputs the output voltage from the electric current detecting circuit, compares the output voltage to a reference voltage, and turns the switch ON if the output voltage is higher than the reference voltage. The reference voltage is set in advance in accordance with a lower limit electric current value for the electric current that must be supplied for the main circuit to operate properly.
摘要翻译： 在从工作电源发生电路到主电路的工作电源的供给线路上设置有开关，设置有电流检测电路和比较评价电路作为控制电路部分，用于控制ON / OFF状态 开关。 电流检测电路根据从上位系统供给的电流的值输入电压，并且反相和放大电压以产生输出电压。 比较评估电路输入来自电流检测电路的输出电压，将输出电压与参考电压进行比较，如果输出电压高于参考电压，则将开关导通。 根据用于主电路正常工作的电流的下限电流值，预先设定基准电压。
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公开(公告)号：US07551074B2
公开(公告)日：2009-06-23
申请号：US11492434
申请日：2006-07-25
申请人： Kurt Polzer
发明人： Kurt Polzer
CPC分类号： G05B19/4185 , G05B19/0425 , G05B2219/25132 , G05B2219/25191 , G05B2219/25428 , G05B2219/31121 , G05B2219/33197 , Y02P90/18 , Y02P90/22
摘要： Field devices are commonly used in unprotected environments, which means that these field devices and the conductor pairs connecting the field devices to the input modules/output modules of an automation installation are exposed to significant climatic and environmental factors. These factors have a detrimental effect on the transmission quality of the signals to be transferred between field devices and modules, which may result in erroneous measurements and dangerous operating states during control of a technical process. Measures to simplify monitoring of the transmission medium are proposed.
摘要翻译： 现场设备通常用于未受保护的环境中，这意味着这些现场设备和将现场设备连接到自动化设备的输入模块/输出模块的导体对将暴露于显着的气候和环境因素。 这些因素对现场设备和模块之间要传输的信号的传输质量有不利影响，这可能导致在技术过程控制期间的错误测量和危险的操作状态。 提出了简化传输介质监控的措施。
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公开(公告)号：US07098798B2
公开(公告)日：2006-08-29
申请号：US10733558
申请日：2003-12-11
申请人： Garrie Huisenga , Randy Longsdorf
发明人： Garrie Huisenga , Randy Longsdorf
IPC分类号： G08B21/00
CPC分类号： G01R19/2509 , G01R19/2506 , G05B23/0235 , G05B2219/33197 , G08C19/02 , Y02P90/86
摘要： A process device for use in a process control system includes output circuitry configured to couple to a process control loop. The output circuitry controls electrical current through the loop. Loop override circuitry is configured to override operation of the output circuitry and set the electrical current in the loop to a desired level.
摘要翻译： 用于过程控制系统的过程装置包括被配置为耦合到过程控制回路的输出电路。 输出电路控制通过回路的电流。 环路覆盖电路被配置为覆盖输出电路的操作并将回路中的电流设置到期望的电平。
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