CN103712707A - 过程变量测量噪声诊断 - Google Patents

过程变量测量噪声诊断 Download PDF

Info

Publication number
CN103712707A
CN103712707A CN201210513583.9A CN201210513583A CN103712707A CN 103712707 A CN103712707 A CN 103712707A CN 201210513583 A CN201210513583 A CN 201210513583A CN 103712707 A CN103712707 A CN 103712707A
Authority
CN
China
Prior art keywords
noise
negative
process variable
sensor signal
positive
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201210513583.9A
Other languages
English (en)
Other versions
CN103712707B (zh
Inventor
杰森·哈洛德·鲁德
劳伦·迈克尔·安格斯塔德
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rosemount Inc
Original Assignee
Rosemount Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Rosemount Inc filed Critical Rosemount Inc
Publication of CN103712707A publication Critical patent/CN103712707A/zh
Application granted granted Critical
Publication of CN103712707B publication Critical patent/CN103712707B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M1/00—Analogue/digital conversion; Digital/analogue conversion
    • H03M1/10—Calibration or testing
    • H03M1/1071—Measuring or testing
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B11/00—Automatic controllers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B15/00—Systems controlled by a computer
    • G05B15/02—Systems controlled by a computer electric
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0221—Preprocessing measurements, e.g. data collection rate adjustment; Standardization of measurements; Time series or signal analysis, e.g. frequency analysis or wavelets; Trustworthiness of measurements; Indexes therefor; Measurements using easily measured parameters to estimate parameters difficult to measure; Virtual sensor creation; De-noising; Sensor fusion; Unconventional preprocessing inherently present in specific fault detection methods like PCA-based methods
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0218—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterised by the fault detection method dealing with either existing or incipient faults
    • G05B23/0224—Process history based detection method, e.g. whereby history implies the availability of large amounts of data
    • G05B23/0227—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions
    • G05B23/0237—Qualitative history assessment, whereby the type of data acted upon, e.g. waveforms, images or patterns, is not relevant, e.g. rule based assessment; if-then decisions based on parallel systems, e.g. comparing signals produced at the same time by same type systems and detect faulty ones by noticing differences among their responses
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B23/00—Testing or monitoring of control systems or parts thereof
    • G05B23/02—Electric testing or monitoring
    • G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
    • G05B23/0259—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the response to fault detection
    • G05B23/0262—Confirmation of fault detection, e.g. extra checks to confirm that a failure has indeed occurred

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Theoretical Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Arrangements For Transmission Of Measured Signals (AREA)
  • Testing Or Calibration Of Command Recording Devices (AREA)
  • Analogue/Digital Conversion (AREA)
  • Testing And Monitoring For Control Systems (AREA)
  • Indication And Recording Devices For Special Purposes And Tariff Metering Devices (AREA)

Abstract

一种过程变量变送器，包括：模数(A/D)转换器，接收由感测过程变量的传感器提供的传感器信号，并将传感器信号转换为数字信号。处理器接收数字信号，并提供指示数字信号的测量输出。噪声检测器接收传感器信号，并产生第一值和第二值，所述第一值指示相对于正阈值的正噪声事件的数目，所述第二值指示相对于负阈值的负噪声事件的数目。处理器估计噪声计数，并基于第一和第二值产生指示检测到的噪声的噪声输出。

Description

过程变量测量噪声诊断
技术领域
本发明涉及用于在过程控制和监测系统中测量温度的过程变量变送器。更具体地，本发明涉及在数字化过程变量的测量时监测测量电路内的噪声电平。
背景技术
过程变量变送器用于测量过程控制或监测系统中的过程参数。基于微处理器的变送器通常包括：传感器、用于将传感器的输出转换为数字形式的模数转换器、用于补偿数字化输出的微处理器、以及用于发送补偿输出的输出电路。当前，通常通过过程控制环(如，4-20毫安控制环)或以无线方式实现该发送。
这样的系统所测量的一个示例参数是温度。通过测量电阻性温度器件(RTD)的电阻或者热电耦输出的电压来感测温度，RTD有时也称为铂电阻温度计或(PRT)。当然，这些类型的温度传感器仅仅是示例，还可以使用其他温度传感器。类似地，温度仅仅是一个示例过程变量，还可以测量多种其他过程控制参数，如，压力、流量、pH等。因此，虽然关于温度传感器进行当前讨论，将意识到：关于其他传感器，可以一样容易地继续该讨论。
在传统测量电路中，在温度传感器和测量变送器之间存在可能发生故障或恶化的若干个连接点。在许多温度测量应用中，用户在控制策略中使用温度测量前了解温度测量何时不管出于什么原因而降级可能是非常重要的。恶化情形可以是由于各种不同的原因，包括：引线/传感器破损、过大的线路电阻、腐蚀或松动的连接等。
已在温度变送器中实现了若干诊断，以评估静态情形，如，引线电阻、过大的DC电压、或传感器破损。然而，这些静态情形中的任一个可能变为在处理测量期间发生的瞬态、动态、或非永久状态。这可能导致若干测量误差源。
例如，在数字化过程期间，对输入至测量模数(A/D)转换器的电压进行平均，并且不提供与数字化过程期间的噪声有关的信息。非对称噪声可能在提供至控制系统的输出中引起测量误差。
此外，噪声当前可能是以变送器的更新率在变送器内逐采样估计的，但在某些情况下，这样可能太慢。因此，以比更新率高的频率发生的测量噪声也可能引起误差。
此外，(传感器线路上或变送器内部)过大的线路电阻或测量电容可能影响测量电路的稳定时间(settling time)。如果稳定时间未设置得足够长，可能发生超过变送器精度规范的测量误差。然而，直接增加稳定时间降低了测量更新率。因此，在测量更新率和由于稳定稳定时间过短而发生的测量误差之间可能存在折中。
发明内容
一种过程变量变送器，包括：模数(A/D)转换器，接收由感测过程变量的传感器提供的传感器信号，并将传感器信号转换为数字信号。处理器接收数字信号，并提供指示数字信号的测量输出。噪声检测器接收传感器信号，并产生第一值和第二值，所述第一值指示相对于正阈值的正噪声事件的数目，所述第二值指示相对于负阈值的负噪声事件的数目。处理器估计噪声计数，并基于第一和第二值产生指示检测到的噪声的噪声输出。
附图说明
图1是示出了包括温度传感器在内的工业过程控制系统的简化图，所述温度传感器被配置为感测过程流体的温度。
图2是更详细地示出了图1的变送器的框图。
图3是示出了具有噪声检测器的模数转换器的部分框图、部分示意图。
图4是示出了图3所示的模数转换器的操作的一个实施例的流程图。
图5是噪声检测组件中的噪声计数累积器的图。
图6-8示出了计数相对于电压的图形曲线。
图9是除了多个传感器以外与图3所示框图类似的框图。
具体实施方式
噪声电平检测器检测过程变量变送器中的正和负噪声事件。即使当执行测量时检测器也进行该检测，使得能够检测到在测量期间改变的噪声事件。检测器向处理器输出噪声的指示，处理器可以表征噪声并建议维护。
图1是工业过程控制系统5的简化图。在图1中，过程管道7承载过程流体。过程变量变送器10被配置为耦合至过程管道7。变送器10包括过程变量传感器18，在一个实施例中，过程变量传感器18包括热电耦或其他温度传感器。然而，这仅仅是示例。变送器10向远程位置(如，过程控制室6)发送信息。该发送可以通过过程控制环(如，双线控制环11)。过程控制环可以根据任意期望格式，包括例如4-20mA过程控制环、承载数字通信的过程控制环、无线过程控制环等。在图1所示的示例中，过程控制环11由控制室6处的电源6A供电。该电源用于向过程变量变送器10供电。传感电阻器6B用于感测流经环路11的电流，虽然还可以使用其他机制。
图2是图1所示的工业过程控制系统5的一部分的框图，并且更详细地示出了变送器10。在图2中，传感器18示意地是从正在感测的过程接收输入14的过程变量传感器。该输入14示意地是流经管道7的过程流体，并且传感器18示意地是温度传感器。然而，传感器18还可以是不同类型的传感器，如，用于感测压力、pH、流量等的传感器。传感器18还可以是若干不同类型温度传感器中的一个。例如，传感器18可以是热电偶或电阻性温度器件(RTD)。在后一情况下，变送器10还包括向传感器18提供激励电流的可控电流源。在这些实施例中的任一个中，传感器18示意地向变送器10中的模数(A/D)转换器22提供模拟输出20，该输出20指示感测到的参数。
在一个实施例中，应注意到：来自传感器18的输出20可以示意地适合地提供给对模拟信号进行放大和滤波的电路(未示出)。这可以是传感器18或变送器10的一部分或者单独的电路。放大和滤波后的信号20接着被提供给A/D转换器22。A/D转换器22将数字化输出提供给处理器24，所述数字化输出是传感器18提供的模拟信号20的数字表示。处理器24具有相关联的存储器和时钟电路，并且提供与通过过程控制环11感测到的参数有关的信息。应注意的是，处理器24可以包括输入/输出(I/O)电路，或者可以单独提供I/O电路，I/O电路在环路11上以数字格式发送信息或者通过控制流经环路11的电流以模拟格式发送信息。
图2所示的实施例示意了A/D转换器22还包括噪声检测组件26。噪声检测组件26监控传感器输出20中的噪声电平，并被部署在A/D转换器22内部或外部。在图2所示的示例中，组件26被示为位于A/D转换器22内部，但这仅仅是以示例方式示出的。当A/D转换器22对输入信号20进行数字化时，噪声检测组件26监测噪声。
图3是A/D转换器22和噪声检测组件26的更详细的图。在图3所示的实施例中，A/D转换器22示意地包括差分放大器30和积分三角(sigma delta)转换器32。积分三角转换器32是以示例方式示出的，并且还可以使用其他转换机制。
图3还示出了噪声检测组件26示意地包括噪声检测器34、开关S1以及电容器C1。图3示出了具有两个引线36和38的传感器18，引线36和38可以分别耦合至输入端子40和42。在一个实施例中，端子40和42之间的电压指示传感器18感测到的温度。图3还示出了传感器18可以示意地是附加引线44和46耦合至附加端子48和50的四引线传感器。或者，附加传感器可以耦合至那些端子，并且可以使用复用器来选择用于测量的输入信号。然而，为了本示例，将参照具有分别与端子40和42相连的两个引线的传感器18继续描述。
以下参照图4和5描述噪声检测组件26的更详细的操作。然而，简言之，电压Vinput产生于端子40和42之间，并且表示传感器18感测到的温度。该输入电压被提供给差分放大器30，在差分放大器30中，该输入电压被放大并提供给转换器32，以转换为被提供给处理器24的数字信号。还以指定速率将Vinput锁存并保持在电容器C1两端。这是通过闭合开关S1实现的。在噪声检测器34中，在若干时钟周期内将Vinput与变送器指定的阈值电压比较。使用连个累积器(或计数器)。如果Vinput和变送器指定的阈值之间的电压差大于或小于阈值，两个累积器之一增加。累积器之一针对沿正向的噪声事件增加，而另一个累积器针对沿负向的噪声事件增加。累积器中的值称为噪声计数41。一旦转换器32已对Vinput进行了数字化，噪声计数41就从噪声检测器34被提供至处理器24，以用于表征检测到的噪声的类型。
图4是噪声检测器34的更详细的框图。图5是更详细地示出了噪声检测组件26的操作的流程图。下面，将图4和图5彼此结合更详细地对它们进行描述。
在描述图5所示的操作前，首先简要讨论图4中的元素。图4中的Vinput是在(图3中的)传感器18两端产生并施加在引线40和42之间的输入电压。Vinput_latched是当开关S1闭合时(图3中的)电容器C1两端的电压。Vos_thresh是正和负阈值发生器60和62用于产生正和负阈值(Vpos_adjust和Vneg_adjust)的电压设置点。在所示实施例中，阈值发生器由求和节点60和62的集合组成。在求和节点60处将Vinput_latched与噪声阈值Vos_thresh相加，在求和节点62处从Vinput_latched中减去Vos_thresh。还应注意的是：噪声阈值Vos_thresh可以根据经验确定，或者可以随实现不同而改变。类似地，可以使用两个不同的阈值来产生Vpos_adjust和Vneg_adjust。在一个实施例中，Vos_thresh的值是以固件或者是在制造时设置的，因此用户无需对其进行设置或调节。进一步地，Vos_thresh的值可由用户调节，并且可以在执行期间决定具体的阈值电压。此外，阈值可以基于各种不同的参数(如，传感器信号的值或其他参数)而改变。
作为结果的正和负阈值电压(Vpos_adjust和Vneg_adjust)被提供至比较器64和66，在其中与Vinput进行比较。比较器64和66的输出被分别提供至计数器68和70的输入，计数器68和70从时钟72接收时钟输入。当Vinput沿正向超过Vpos_adjust时，并且当时钟72提供时钟脉冲时，计数器68加1。类似地，当Vinput沿负向超过Vneg_adjust时，并且当时钟72向计数器70提供时钟脉冲时，则计数器70加1。实质上，在时钟72的每个时钟周期期间，估计比较器64和66的输出，并且如果超过正和负噪声阈值电压(Vpos_adjust和Vnega_djust)，使用噪声寄存器(或计数器)68和70累积与正和负噪声事件相对应的计数。还通过时钟72对刷新计数器73进行钟控，并且刷新计数器73提供以预定刷新率来刷新Vinput_latch的方法。刷新计数器数到刷新周期，在刷新周期中，其基于计数器73的输出以刷新率来刷新锁存在电容器C1两端的电压。
图4所示的实施例仅仅是说明性实施例，还可以使用其他方式。例如，在一些应用中，可以仅使用单个噪声计数器，并且单个噪声计数器对于正噪声事件增加而对于负噪声事件减少。例如，这可以用于表征噪声对称。
利用图4的说明，下面将参照图5来描述A/D转换器22在检测噪声时的全部操作。将图3-5彼此结合来对它们进行描述。
在一个实施例中，在检测噪声前，处理器24向计数器68和70提供重置信号，对噪声计数器进行重置。这由图5中的框80指示。处理器24还说明性地重置刷新计数器73。这由图5中的框82指示。
接着，处理器24通过闭合开关S1将Vinput锁存在电容器C1两端。这由图5中的框84指示。可以在转换器32对Vinput执行模数转换期间的某一时刻将Vinput锁存在电容器C1两端。在一个实施例中，在转换过程开始时锁存Vinput，但也可以间歇地对其进行刷新。即，处理器24可以断开开关S1，并且每X个刷新计数器73输出计数再次闭合开关。特定的刷新率可以根据经验来确定，或者基于应用或以其他方式进行调节。刷新率可以固件或在制造时进行设置，因此用户无需对其进行设置刷新率。进一步地，可以根据期望赋予用户重置刷新率的能力。
在任意情况下，一旦Vinput锁存在电容器C1两端，求和节点60和62就产生被施加至比较器64和66的正和负阈值电压Vpos_adjust和Vneg_adjust。如以上简要提到的，当Vinput沿正向超过Vpos_adjust时，则计数器68针对时钟72的每个时钟周期增加。类似地，当Vinput沿负向超过负阈值Vneg_adjust时，则计数器70针对时钟72的每个时钟周期增加。测试正和负噪声输出以及根据需要使计数器68和70增加由图5中的框86指示。在每个时钟周期后，确定刷新计数器73是否已经达到指示应刷新锁存电压Vinput_latched的计数值。如果已经达到，处理返回至框82，其中，刷新计数器73被设置为0。确定是否要重置刷新计数器由图5中的框88指示。
如果在框88确定尚不需要重置刷新计数器，则处理器24确定转换器32是否已完成其对Vinput的测量。这由图5中的框90指示。如果尚未完成，处理返回至框86，其中，检测器34继续测试正和负噪声输出，并且根据需要使计数器68和70增加。
然而，如果在框90确定A/D转换已经完成，则将计数器68和70提供的计数41输出至处理器24。这由图5中的框95指示。处理器24继而能够基于计数41来表征检测到的噪声。
接着，处理器24能够基于来自计数器68和70的计数41，输出其识别出的噪声特性。输出噪声特性由图5中的框94指示。
虽然存在能够由处理器24基于计数41识别的多种不同噪声特性，下面将仅以示例为目的描述其中的若干噪声特性。
第一噪声特性称为噪声对称。如果正和负计数器68和70提供相等的计数，并且那些计数未超过阈值(即，计数不算过大)，则处理器24可以确定噪声是对称的。这可以提供测量输出将受测量噪声影响的指示，但其允许处理器24向用户提供可能存在恶化情形的指示。这类噪声可由工厂环境中的热电偶退化而引起，其中，噪声电流导致在较高阻抗的线路上产生可测电压。这可以向用户通知他们应向他们的传感器测量环路提供维护或其他维护。
第二特性反映噪声频率。即，处理器24可以考虑定义了在电容器C1两端锁存Vinput的周期的刷新率，以及由计数器68和70输出的计数量。给定这些参数，可以确定近似的噪声频率。如果在测量过程内周期性地锁存新电压电平但仍累积噪声计数，这允许处理器24至少粗略地估计给定测量中的噪声量。
另一噪声特性是噪声电平。可以通过计数器68和70输出的计数量以及所选择的电压阈值电平Vos_thresh来估计噪声电平。阈值电平可以被调节为向处理器24并最终向用户提供关于系统中存在多大噪声的信息。当在RTD测量线路上产生热电动势(EMFs)时这可能是重要的。如果连接点腐蚀或者磨损并且在该连接两端存在温度梯度，可能在RTD测量上引起动态EMF情形。在该情况下，可以使用户意识到这点，使得他们能够对测量环路执行维护。处理器24可以产生消息，向用户通知该维护需求。
另一噪声特性反映稳定时间是否充足。即，如果在转换器32执行的数字化过程开始时将测量电压Vinput锁存在电容器C1两端，并且假设沿正向或负向(但并非沿双向)存在相对较大数目的噪声计数，则处理器24可以确定需要调节稳定时间。在调节了稳定时间后，可以计算新测量。该过程可以有助于初始化所连接的测量环路的稳定时间，从而以最佳更新率提供最高级别的精度。
图6-8是x轴上的计数器68和70相对于y轴上的电压的图。图6-8示出了一些噪声特性。在图6中，Vinput由线100指示，Vpos_adjust由线102指示，而Vneg_adjst由线104指示。图6示出了正常测量噪声的反映可以是怎样的。即，Vinput恰好在阈值电压102和104所建立的阈值内变化。可以看到：计数器68和70的输出都是0，这是由于Vinput在测量周期期间尚未越过阈值102或104。
图7类似于图6，并且对类似项目进行类似编号。然而，在图7中可以看到：Vinput100以特定次数越过阈值电压102和104。计数器68的正计数是29次，计数器70的负计数是25次。这指示噪声沿正向略非对称。
图8也类似于图6，并且对类似项目进行类似编号。然而，图8示出：除了测量周期的最开始，Vinput全部时间高于正阈值102。因此，计数器68输出的正计数是380，而不存在负计数。这倾向于指示：稳定时间是不精确地，且需要调节。
再次参照图5，框110指示令处理器24输出对与噪声对称相对应的噪声特性的指示。框112指示输出与噪声频率相对应的噪声特性，而框114指示输出关于噪声电平的指示，并且框116指示输出反映稳定时间问题的指示。当然，处理器24还可以产生指示其他噪声特性的其他输出118。
将意识到：处理器24或变送器10的其他组件也可以基于计数器68和70输出的计数来执行其他动作。执行这些其他动作由图5中的框120指示。例如，处理器24可以调节稳定时间(如框122所指示)，或者其可以允许用户调节测量周期的积分周期(如框124所指示)。类似地，处理器24可以基于根据计数器68和70输出的计数41识别的噪声特性来产生测量系统的简档。这由图5中的框126指示。可以多种方式产生简档。例如，使用学习过程(如统计过程监测)，处理器24可以产生可以随时间参照的测量系统的简档。这可以有助于理解应使用何种噪声电平、刷新率和稳定时间来配置每个特定用户安装。还可以使用启动时的噪声电平作为在时间上比较其他测量采样周期的基准。变送器10或其他组件还可以执行各种其他动作，并且这由图5中的框128指示。
类似地，可以使用计数来检测测量环路可以暴露于的线路频率。例如，在某些用户安装中，线路频率(如50Hz或60Hz)可以被耦合至测量线路中。在这样的安装中，可以向用户提供可设置参数，允许在该段时间对测量进行积分。
还将意识到：可以在给定的变送器10中提供多个噪声检测组件26。每个噪声检测组件26可以被配置为在测量周期期间处理不同的噪声特性。例如，一个噪声检测组件26可以被配置为具体识别稳定时间问题，而另一个噪声检测组件26可以关注噪声频率，并且再一个噪声检测组件26关注噪声电平，等等。
此外，即使在变送器10当前并未测量给定传感器输出时，噪声检测组件26也可用于独立地连续监测多个不同传感器中每个传感器上的噪声。图9示出了这样的实施例，其与图2所示实施例类似，只不过还示出了第二传感器19。当然，可以提供多个附加传感器，并且为了示例目的图9仅示出了两个传感器。在图9的实施例中，变送器10可以通过复用器一次接收一个传感器输入。因此，由于变送器10正在测量传感器19的输出，变送器10可能不在测量传感器18的输出。在该情况下，然而，噪声检测组件27仍在检测传感器18的输出上的操作。因此，当噪声检测组件26正在检测转换器22当前正在测量的传感器19上的噪声时，噪声检测组件27也正在检测传感器18的输出上的噪声，这是由于检测当前未被测量的传感器的输出上的噪声也可能是有意义且有帮助的。该实施例还可以允许系统标准不同传感器间的操作差异。
系统还能够有助于精确补偿感测噪声。一旦表征了噪声，补偿就变得更加精确。此外，可以控制用于对计数器进行钟控的时钟信号，以获得更多信息。如果时钟频率增加，可以检测到更高频率的噪声分量。因此，可以根据期望控制时钟频率。
虽然参照优选实施例描述了本发明，本领域技术人员将认识到：可以在不背离本发明精神和范围的前提下做出形式和细节上的改变。

Claims (22)

1.一种过程变量变送器，包括：
模数A/D转换器，接收由感测过程变量的传感器提供的传感器信号，并将所述传感器信号转换为数字信号；
处理器，接收所述数字信号，并提供指示所述数字信号的测量输出；以及
噪声检测器，接收所述传感器信号，并产生第一值和第二值，所述第一值指示相对于正阈值的正噪声事件的数目，所述第二值指示相对于负阈值的负噪声事件的数目；所述处理器估计噪声计数，并基于所述第一值和所述第二值产生指示检测到的噪声的噪声输出。
2.根据权利要求1所述的过程变量变送器，其中，所述噪声检测器包括：
正噪声阈值发生器，接收所述传感器信号，并产生正阈值作为正电压阈值；以及
负噪声阈值发生器，接收所述传感器信号，并产生负阈值作为负电压阈值。
3.根据权利要求2所述的过程变量变送器，其中，所述噪声检测器还包括：
正噪声计数器，接收所述传感器信号、时钟输入和正电压阈值，并在所述传感器信号沿正向超过所述正电压阈值时，随时钟信号上的每个时钟脉冲累积正计数。
4.根据权利要求3所述的过程变量变送器，其中，所述噪声检测器还包括：
负噪声计数器，接收所述传感器信号、时钟输入和负电压阈值，并在所述传感器信号沿负向超过所述负电压阈值时，随时钟信号上的每个时钟脉冲累积负噪声计数。
5.根据权利要求4所述的过程变量变送器，其中，所述处理器基于正和负噪声计数来产生噪声输出。
6.根据权利要求5所述的过程变量变送器，其中，所述处理器基于正和负噪声计数将噪声输出产生为对噪声的表征。
7.根据权利要求6所述的过程变量变送器，其中，所述处理器在所述A/D转换器正将所述传感器信号转换为所述数字信号时产生对噪声的表征。
8.根据权利要求6所述的过程变量变送器，其中，所述处理器通过分析正和负噪声计数来产生噪声输出，以识别噪声对称、噪声频率和噪声电平。
9.根据权利要求7所述的过程变量变送器，其中，所述A/D转换器在稳定时间内将所述传感器信号转换为所述数字信号；并且，所述处理器产生噪声输出，以标识稳定时间是否对测量误差做出贡献。
10.根据权利要求6所述的过程变量变送器，其中，所述处理器基于随时间对噪声的表征，来产生所述过程变量变送器的噪声简档。
11.根据权利要求2所述的过程变量变送器，其中，所述处理器将所述传感器信号间歇地锁存在存储电容器两端；并且，所述正噪声阈值发生器和所述负噪声阈值发生器接收存储电容器两端的电压作为所述传感器信号。
12.根据权利要求11所述的过程变量变送器，其中，所述噪声检测器还包括：
刷新计数器，其中，所述处理器基于所述刷新计数器的输出，来刷新锁存在所述存储电容器两端的所述传感器信号。
13.根据权利要求1所述的过程变量变送器，其中，所述噪声检测器是A/D转换器的一部分。
14.根据权利要求1所述的过程变量变送器，其中，所述噪声检测器与A/D转换器分离。
15.根据权利要求1所述的过程变量变送器，其中，所述处理器通过过程控制环提供测量输出。
16.根据权利要求1所述的过程变量变送器，其中，所述传感器包括：从包括电阻性温度器件和热电偶在内的组中选择的至少一个温度传感器。
17.根据权利要求1所述的过程变量变送器，其中，所述噪声输出指示线路噪声。
18.根据权利要求1所述的过程变量变送器，其中，所述噪声检测器监测来自多个传感器信号的噪声。
19.一种在过程变量变送器中感测过程变量的方法，包括：
从传感器接收指示过程变量的模拟传感器信号；
将所述模拟传感器信号转换为数字信号；
在将所述模拟传感器信号转换为所述数字信号期间，在正噪声累积器中累积正噪声计数，在负噪声累积器中累积负噪声计数，所述正噪声计数指示超过正噪声阈值的噪声事件，所述负噪声计数指示超过负噪声阈值的噪声事件；
基于所述正噪声计数和所述负噪声计数，对所述模拟传感器信号上的噪声进行表征；以及
在过程控制环上产生输出，所述输出指示数字信号以及对所述模拟传感器信号上的噪声的表征。
20.根据权利要求17所述的方法，其中，累积正噪声计数包括：基于所述传感器信号产生所述正噪声阈值；并且，累积负噪声计数包括：基于所述传感器信号产生所述负噪声阈值。
21.根据权利要求18所述的方法，其中，产生指示对噪声的表征的输出包括：
产生输出，以标识对噪声对称、噪声频率、噪声电平的估计、噪声源、以及所述过程变量变送器的噪声简档中的至少一个。
22.一种过程变量变送器，包括：
模数A/D转换器，接收由感测过程温度的温度传感器提供的温度传感器信号，并将所述温度传感器信号转换为数字信号；
处理器，接收所述数字信号，并控制过程控制环上的电流，以提供指示所述数字信号的测量输出；以及
噪声检测器，接收所述温度传感器信号，并在将所述温度传感器信号转换为所述数字信号期间，产生第一计数值和第二计数值，所述第一计数值指示相对于正阈值的正噪声事件的数目，所述第二计数值指示相对于负阈值的负噪声事件的数目，所述处理器基于第一计数值和所述第二计数值产生噪声输出，所述噪声输出指示检测到的噪声的特性。
CN201210513583.9A 2012-09-28 2012-12-04 过程变量测量噪声诊断 Active CN103712707B (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US13/631,048 2012-09-28
US13/631,048 US9602122B2 (en) 2012-09-28 2012-09-28 Process variable measurement noise diagnostic

Publications (2)

Publication Number Publication Date
CN103712707A true CN103712707A (zh) 2014-04-09
CN103712707B CN103712707B (zh) 2017-04-12

Family

ID=48976100

Family Applications (2)

Application Number Title Priority Date Filing Date
CN2012206602665U Expired - Fee Related CN203148583U (zh) 2012-09-28 2012-12-04 过程变量变送器
CN201210513583.9A Active CN103712707B (zh) 2012-09-28 2012-12-04 过程变量测量噪声诊断

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN2012206602665U Expired - Fee Related CN203148583U (zh) 2012-09-28 2012-12-04 过程变量变送器

Country Status (9)

Country Link
US (1) US9602122B2 (zh)
EP (1) EP2901226B1 (zh)
JP (1) JP6039087B2 (zh)
CN (2) CN203148583U (zh)
AU (1) AU2013323856B2 (zh)
BR (1) BR112015006400A2 (zh)
CA (1) CA2886533C (zh)
RU (1) RU2609758C2 (zh)
WO (1) WO2014052232A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105222912A (zh) * 2015-11-02 2016-01-06 沈阳航天新光集团有限公司 一种基于复合式数字滤波的发电机组温度检测系统

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9602122B2 (en) * 2012-09-28 2017-03-21 Rosemount Inc. Process variable measurement noise diagnostic
US10663931B2 (en) 2013-09-24 2020-05-26 Rosemount Inc. Process variable transmitter with dual compartment housing
US9642273B2 (en) 2013-09-25 2017-05-02 Rosemount Inc. Industrial process field device with humidity-sealed electronics module
CN115014412A (zh) 2013-09-30 2022-09-06 罗斯蒙特公司 具有双隔间式壳体的过程变量变送器
US10015899B2 (en) 2015-06-29 2018-07-03 Rosemount Inc. Terminal block with sealed interconnect system
KR101881457B1 (ko) * 2016-05-11 2018-07-25 창원대학교 산학협력단 Vrh 주형을 이용한 경량기포재료의 고속경화 장치 및 고속경화 방법
CN108984550B (zh) * 2017-05-31 2022-08-26 西门子公司 确定数据的信号规则以对数据标注的方法、装置和系统
EP4180791A1 (de) * 2021-11-10 2023-05-17 SFS Group International AG Sensoranordnung

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924068A (en) * 1973-12-27 1975-12-02 Nasa Low distortion receiver for bi-level baseband PCM waveforms
US6614271B1 (en) * 2002-06-13 2003-09-02 Intel Corporation Signal detect circuit for high speed data receivers
US20080208538A1 (en) * 2007-02-26 2008-08-28 Qualcomm Incorporated Systems, methods, and apparatus for signal separation
US20090309574A1 (en) * 2008-06-16 2009-12-17 Airbus France Device for counting oscillations of an oscillating temporal signal
US7821437B1 (en) * 2009-04-08 2010-10-26 Rosemount Inc. Line noise analysis and detection and measurement error reduction
CN102410847A (zh) * 2010-08-11 2012-04-11 罗斯蒙德公司 噪声检测和避免
US8311778B2 (en) * 2009-09-22 2012-11-13 Rosemount Inc. Industrial process control transmitter with multiple sensors
CN203148583U (zh) * 2012-09-28 2013-08-21 罗斯蒙德公司 过程变量变送器

Family Cites Families (495)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL135953C (zh) 1960-12-02
US3096434A (en) 1961-11-28 1963-07-02 Daniel Orifice Fitting Company Multiple integration flow computer
US3404264A (en) 1965-07-19 1968-10-01 American Meter Co Telemetering system for determining rate of flow
US3468164A (en) 1966-08-26 1969-09-23 Westinghouse Electric Corp Open thermocouple detection apparatus
GB1224904A (en) 1968-08-09 1971-03-10 John Stewart Simpson Stewart Improvements in and relating to electromedical apparatus
US3590370A (en) 1969-04-09 1971-06-29 Leeds & Northrup Co Method and apparatus for detecting the open-circuit condition of a thermocouple by sending a pulse through the thermocouple and a reactive element in series
US3701280A (en) 1970-03-18 1972-10-31 Daniel Ind Inc Method and apparatus for determining the supercompressibility factor of natural gas
US4083031A (en) 1970-07-23 1978-04-04 The United States Of America As Represented By The Secretary Of The Navy Acoustic presence detection method and apparatus
US3691842A (en) 1970-09-08 1972-09-19 Beckman Instruments Inc Differential pressure transducer
US3688190A (en) 1970-09-25 1972-08-29 Beckman Instruments Inc Differential capacitance circuitry for differential pressure measuring instruments
CA999950A (en) 1972-04-24 1976-11-16 Donald B. Brewster Bleach plant control method
US3849637A (en) 1973-05-22 1974-11-19 Combustion Eng Reactor megawatt demand setter
US3855858A (en) 1973-08-01 1974-12-24 V Cushing Self synchronous noise rejection circuit for fluid velocity meter
USRE29383E (en) 1974-01-10 1977-09-06 Process Systems, Inc. Digital fluid flow rate measurement or control system
US3948098A (en) 1974-04-24 1976-04-06 The Foxboro Company Vortex flow meter transmitter including piezo-electric sensor
US3952759A (en) 1974-08-14 1976-04-27 M & J Valve Company Liquid line break control system and method
DE2460066C3 (de) 1974-12-19 1981-08-06 Brown, Boveri & Cie Ag, 6800 Mannheim Verfahren und Vorrichtung zum selbsttätigen Regeln des Brenstoff-Luftverhältnisses einer Verbrennung
US3973184A (en) 1975-01-27 1976-08-03 Leeds & Northrup Company Thermocouple circuit detector for simultaneous analog trend recording and analog to digital conversion
GB1534280A (en) 1975-02-28 1978-11-29 Solartron Electronic Group Method and apparatus for testing thermocouples
JPS5631573Y2 (zh) 1975-03-12 1981-07-28
US4058975A (en) 1975-12-08 1977-11-22 General Electric Company Gas turbine temperature sensor validation apparatus and method
US4099413A (en) 1976-06-25 1978-07-11 Yokogawa Electric Works, Ltd. Thermal noise thermometer
US4102199A (en) 1976-08-26 1978-07-25 Megasystems, Inc. RTD measurement system
US4122719A (en) 1977-07-08 1978-10-31 Environmental Systems Corporation System for accurate measurement of temperature
JPS54111050A (en) 1978-02-21 1979-08-31 Toyota Motor Corp Automatic speed changer
US4255964A (en) 1978-11-30 1981-03-17 The Garrett Corporation Fluid monitor
US4250490A (en) 1979-01-19 1981-02-10 Rosemount Inc. Two wire transmitter for converting a varying signal from a remote reactance sensor to a DC current signal
JPS6230915Y2 (zh) 1979-03-08 1987-08-08
US4249164A (en) 1979-05-14 1981-02-03 Tivy Vincent V Flow meter
US4279013A (en) 1979-10-31 1981-07-14 The Valeron Corporation Machine process controller
GB2067756B (en) 1980-01-15 1983-11-16 Marconi Co Ltd Liquid level measurement
US4337516A (en) 1980-06-26 1982-06-29 United Technologies Corporation Sensor fault detection by activity monitoring
FR2486654A1 (fr) 1980-07-08 1982-01-15 Cgr Dispositif d'activation d'un appareil de mesure d'emission acoustique par detection du bruit de fond
US4390321A (en) 1980-10-14 1983-06-28 American Davidson, Inc. Control apparatus and method for an oil-well pump assembly
JPS60507Y2 (ja) 1980-12-02 1985-01-09 トヨタ自動車株式会社 デイスクブレ−キ用摩擦パツド
DE3213866A1 (de) 1980-12-18 1983-10-27 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zur bestimmung des wertes des ohmschen widerstandes eines messobjekts
US4446741A (en) 1981-06-01 1984-05-08 Prvni Brnenska Strojirna, Narodni Podnik Vibration transducer
US4417312A (en) 1981-06-08 1983-11-22 Worcester Controls Corporation Electronic controller for valve actuators
JPS57196619U (zh) 1981-06-11 1982-12-13
US4459858A (en) 1981-09-18 1984-07-17 Marsh-Mcbirney, Inc. Flow meter having an electromagnetic sensor probe
US4399824A (en) 1981-10-05 1983-08-23 Air-Shields, Inc. Apparatus for detecting probe dislodgement
US4463612A (en) 1981-12-10 1984-08-07 The Babcock & Wilcox Company Electronic circuit using digital techniques for vortex shedding flowmeter signal processing
JPS58129316U (ja) 1982-02-24 1983-09-01 古田　雅夫 ボルト頭部の押え板
US4536753A (en) 1982-08-02 1985-08-20 Del Norte Technology, Inc. Self monitoring intruder detecting system of noise-cancelling vibration detectors
US4571689A (en) 1982-10-20 1986-02-18 The United States Of America As Represented By The Secretary Of The Air Force Multiple thermocouple testing device
JPS59116811U (ja) 1983-01-28 1984-08-07 株式会社日立製作所 厚み測定装置
KR900000822B1 (ko) 1983-04-13 1990-02-17 다데이시덴기 가부시기가이샤 전자온도계
JPS59163520U (ja) 1983-04-19 1984-11-01 トヨタ自動車株式会社 自動車のドア構造
US4668473A (en) 1983-04-25 1987-05-26 The Babcock & Wilcox Company Control system for ethylene polymerization reactor
JPS59176643U (ja) 1983-05-09 1984-11-26 吉田　忠男 クリ−ン・ル−ム
JPS59211196A (ja) 1983-05-17 1984-11-29 三菱重工業株式会社 検出器応答異常診断装置
JPS59211896A (ja) 1983-05-17 1984-11-30 三菱重工業株式会社 検出器応答異常診断装置
JPH0619666B2 (ja) 1983-06-30 1994-03-16 富士通株式会社 故障診断処理方式
US4530234A (en) 1983-06-30 1985-07-23 Mobil Oil Corporation Method and system for measuring properties of fluids
US4540468A (en) 1983-09-26 1985-09-10 Board Of Trustees Of The University Of Maine Method for determining the degree of completion and pulp yield
US4707796A (en) 1983-10-19 1987-11-17 Calabro Salvatore R Reliability and maintainability indicator
JPS6076619U (ja) 1983-10-31 1985-05-29 株式会社押上紙器印刷 組立紙容器
US4686638A (en) 1983-11-04 1987-08-11 Kabushiki Kaisha Kosumo Keiki Leakage inspection method with object type compensation
US4705212A (en) 1983-12-27 1987-11-10 Engineering Measurements Co. Method and apparatus for managing steam systems
JPS60131495U (ja) 1984-02-14 1985-09-03 日立造船株式会社 張出軸受の海水潤滑装置
DE3583057D1 (de) 1984-03-31 1991-07-11 Barmag Barmer Maschf Verfahren zur zentralen erfassung von messwerten einer vielzahl von messstellen.
JPS60158987U (ja) 1984-04-02 1985-10-22 スズキ株式会社 鞍乗型車両の泥よけ装置
JPS60174915U (ja) 1984-04-26 1985-11-20 花井　安五郎 エアブリ−ザ−の圧力調整装置
US4649515A (en) 1984-04-30 1987-03-10 Westinghouse Electric Corp. Methods and apparatus for system fault diagnosis and control
US4517468A (en) 1984-04-30 1985-05-14 Westinghouse Electric Corp. Diagnostic system and method
US4644479A (en) 1984-07-31 1987-02-17 Westinghouse Electric Corp. Diagnostic apparatus
US4642782A (en) 1984-07-31 1987-02-10 Westinghouse Electric Corp. Rule based diagnostic system with dynamic alteration capability
US4630265A (en) 1984-09-26 1986-12-16 General Electric Company Method and apparatus for selecting for use between data buses in a redundant bus communication system
DE3503597C1 (de) 1985-02-02 1986-07-10 Carl Schenck Ag, 6100 Darmstadt Servo-Beschleunigungsaufnehmer für tiefe Frequenzen
JPH0734162B2 (ja) 1985-02-06 1995-04-12 株式会社日立製作所 類推制御方法
US4758308A (en) 1985-03-05 1988-07-19 Carr Wayne F System for monitoring contaminants with a detector in a paper pulp stream
JPS61208089A (ja) 1985-03-11 1986-09-16 株式会社堀場製作所 Ｃｒｔデイスプレイ装置におけるグラフイツク表示画面への直線カ−ソルの表示方法
JPH025105Y2 (zh) 1985-05-21 1990-02-07
JPS61281307A (ja) * 1985-06-04 1986-12-11 Sanyo Electric Co Ltd プロセス異常検出装置
JPS6250901U (zh) 1985-09-19 1987-03-30
JPS6280535U (zh) 1985-11-06 1987-05-22
US5179540A (en) 1985-11-08 1993-01-12 Harris Corporation Programmable chip enable logic function
DE3540204C1 (de) 1985-11-13 1986-09-25 Daimler-Benz Ag, 7000 Stuttgart Vorrichtung in einem Kraftfahrzeug zur Anzeige der Aussentemperatur
US4807151A (en) 1986-04-11 1989-02-21 Purdue Research Foundation Electrical technique for correcting bridge type mass air flow rate sensor errors resulting from ambient temperature variations
GB8611360D0 (en) 1986-05-09 1986-06-18 Eaton Williams Raymond H Air condition monitor unit
US4696191A (en) 1986-06-24 1987-09-29 The United States Of America As Represented By The United States Department Of Energy Apparatus and method for void/particulate detection
JPS6340825A (ja) 1986-08-07 1988-02-22 Terumo Corp 電子体温計
US4736367A (en) 1986-12-22 1988-04-05 Chrysler Motors Corporation Smart control and sensor devices single wire bus multiplex system
US5005142A (en) 1987-01-30 1991-04-02 Westinghouse Electric Corp. Smart sensor system for diagnostic monitoring
US4736763A (en) 1987-02-26 1988-04-12 Britton George L Automatic device for the detection and shutoff of unwanted liquid flow in pipes
EP0308455B1 (de) 1987-04-02 1993-01-27 Eftag Entstaubungs- Und Fördertechnik Ag Schaltungsanordnung zur auswertung der von einem halbleitergassensor erzeugten signale
JPS63169532U (zh) 1987-04-24 1988-11-04
US4833922A (en) 1987-06-01 1989-05-30 Rosemount Inc. Modular transmitter
US5122794A (en) 1987-08-11 1992-06-16 Rosemount Inc. Dual master implied token communication system
US4988990A (en) 1989-05-09 1991-01-29 Rosemount Inc. Dual master implied token communication system
US4873655A (en) 1987-08-21 1989-10-10 Board Of Regents, The University Of Texas System Sensor conditioning method and apparatus
JPS6472699A (en) 1987-09-12 1989-03-17 Sony Corp Speaker diaphragm and its manufacture
ATE186789T1 (de) 1987-09-30 1999-12-15 Du Pont Expertensystem mit verfahrenssteuerung
US4907167A (en) 1987-09-30 1990-03-06 E. I. Du Pont De Nemours And Company Process control system with action logging
US4818994A (en) 1987-10-22 1989-04-04 Rosemount Inc. Transmitter with internal serial bus
US4831564A (en) 1987-10-22 1989-05-16 Suga Test Instruments Co., Ltd. Apparatus for estimating and displaying remainder of lifetime of xenon lamps
US5274572A (en) 1987-12-02 1993-12-28 Schlumberger Technology Corporation Method and apparatus for knowledge-based signal monitoring and analysis
US4866628A (en) 1987-12-18 1989-09-12 International Business Machines Corp. Automated production dispatch system with feedback control
US5488697A (en) 1988-01-12 1996-01-30 Honeywell Inc. Problem state monitoring system
US5193143A (en) 1988-01-12 1993-03-09 Honeywell Inc. Problem state monitoring
US4841286A (en) 1988-02-08 1989-06-20 Honeywell Inc. Apparatus and method for detection of an open thermocouple in a process control network
US4924418A (en) 1988-02-10 1990-05-08 Dickey-John Corporation Universal monitor
JPH0763586B2 (ja) 1988-03-04 1995-07-12 川崎製鉄株式会社 コークス炉ガス脱硫液の再生における廃空気の処理方法
JPH0774961B2 (ja) 1988-04-07 1995-08-09 株式会社日立製作所 オートチユーニングｐｉｄ調節計
US4926364A (en) 1988-07-25 1990-05-15 Westinghouse Electric Corp. Method and apparatus for determining weighted average of process variable
US4964125A (en) 1988-08-19 1990-10-16 Hughes Aircraft Company Method and apparatus for diagnosing faults
US5197328A (en) 1988-08-25 1993-03-30 Fisher Controls International, Inc. Diagnostic apparatus and method for fluid control valves
US5067099A (en) 1988-11-03 1991-11-19 Allied-Signal Inc. Methods and apparatus for monitoring system performance
US5099436A (en) 1988-11-03 1992-03-24 Allied-Signal Inc. Methods and apparatus for performing system fault diagnosis
EP0369489A3 (en) 1988-11-18 1991-11-27 Omron Corporation Sensor controller system
US5025344A (en) 1988-11-30 1991-06-18 Carnegie Mellon University Built-in current testing of integrated circuits
JP2714091B2 (ja) 1989-01-09 1998-02-16 株式会社日立製作所 フィールド計器
NL8900050A (nl) 1989-01-10 1990-08-01 Philips Nv Inrichting voor het meten van een ruststroom van een geintegreerde monolitische digitale schakeling, geintegreerde monolitische digitale schakeling voorzien van een dergelijke inrichting en testapparaat voorzien van een dergelijke inrichting.
US5098197A (en) 1989-01-30 1992-03-24 The United States Of America As Represented By The United States Department Of Energy Optical Johnson noise thermometry
US5089979A (en) 1989-02-08 1992-02-18 Basic Measuring Instruments Apparatus for digital calibration of detachable transducers
US5081598A (en) 1989-02-21 1992-01-14 Westinghouse Electric Corp. Method for associating text in automatic diagnostic system to produce recommended actions automatically
US4939753A (en) 1989-02-24 1990-07-03 Rosemount Inc. Time synchronization of control networks
DE4008560C2 (de) 1989-03-17 1995-11-02 Hitachi Ltd Verfahren und Vorrichtung zum Bestimmen einer Restlebensdauer eines Aggregats
JPH0692914B2 (ja) 1989-04-14 1994-11-16 株式会社日立製作所 機器／設備の状態診断システム
US5089984A (en) 1989-05-15 1992-02-18 Allen-Bradley Company, Inc. Adaptive alarm controller changes multiple inputs to industrial controller in order for state word to conform with stored state word
US4934196A (en) 1989-06-02 1990-06-19 Micro Motion, Inc. Coriolis mass flow rate meter having a substantially increased noise immunity
JPH0650557B2 (ja) 1989-07-04 1994-06-29 株式会社日立製作所 フィールド計器の通信方式
US5269311A (en) 1989-08-29 1993-12-14 Abbott Laboratories Method for compensating errors in a pressure transducer
US5293585A (en) 1989-08-31 1994-03-08 Kabushiki Kaisha Toshiba Industrial expert system
JP2712625B2 (ja) 1989-09-19 1998-02-16 横河電機株式会社 信号伝送器
EP0495001B1 (en) 1989-10-02 1999-02-17 Rosemount Inc. Field-mounted control unit
JP2656637B2 (ja) 1989-11-22 1997-09-24 株式会社日立製作所 プロセス制御システム及び発電プラントプロセス制御システム
JPH03166601A (ja) 1989-11-27 1991-07-18 Hitachi Ltd 制御支援装置
US5019760A (en) 1989-12-07 1991-05-28 Electric Power Research Institute Thermal life indicator
CA2031765C (en) 1989-12-08 1996-02-20 Masahide Nomura Method and system for performing control conforming with characteristics of controlled system
US5633809A (en) 1989-12-22 1997-05-27 American Sigma, Inc. Multi-function flow monitoring apparatus with area velocity sensor capability
US5111531A (en) 1990-01-08 1992-05-05 Automation Technology, Inc. Process control using neural network
JP2753592B2 (ja) 1990-01-18 1998-05-20 横河電機株式会社 ２線式計器
JP2712701B2 (ja) 1990-02-02 1998-02-16 横河電機株式会社 圧力伝送器
US5235527A (en) 1990-02-09 1993-08-10 Toyota Jidosha Kabushiki Kaisha Method for diagnosing abnormality of sensor
US5134574A (en) 1990-02-27 1992-07-28 The Foxboro Company Performance control apparatus and method in a processing plant
JPH0470906A (ja) 1990-07-04 1992-03-05 Hitachi Ltd 制御装置
US5122976A (en) 1990-03-12 1992-06-16 Westinghouse Electric Corp. Method and apparatus for remotely controlling sensor processing algorithms to expert sensor diagnoses
JPH03118424U (zh) 1990-03-20 1991-12-06
US5267241A (en) 1990-04-04 1993-11-30 Avasem Corporation Error correction code dynamic range control system
US5053815A (en) 1990-04-09 1991-10-01 Eastman Kodak Company Reproduction apparatus having real time statistical process control
US5047990A (en) 1990-06-01 1991-09-10 The United States Of America As Represented By The Secretary Of The Navy Underwater acoustic data acquisition system
DE69121789T2 (de) 1990-06-04 1997-04-03 Hitachi Ltd Steuerungsvorrichtung für die Steuerung einer gesteuerten Anlage und Steuerungsverfahren dafür
US5150289A (en) 1990-07-30 1992-09-22 The Foxboro Company Method and apparatus for process control
US5282261A (en) 1990-08-03 1994-01-25 E. I. Du Pont De Nemours And Co., Inc. Neural network process measurement and control
US5212765A (en) 1990-08-03 1993-05-18 E. I. Du Pont De Nemours & Co., Inc. On-line training neural network system for process control
US5142612A (en) 1990-08-03 1992-08-25 E. I. Du Pont De Nemours & Co. (Inc.) Computer neural network supervisory process control system and method
US5197114A (en) 1990-08-03 1993-03-23 E. I. Du Pont De Nemours & Co., Inc. Computer neural network regulatory process control system and method
US5167009A (en) 1990-08-03 1992-11-24 E. I. Du Pont De Nemours & Co. (Inc.) On-line process control neural network using data pointers
US5121467A (en) 1990-08-03 1992-06-09 E.I. Du Pont De Nemours & Co., Inc. Neural network/expert system process control system and method
US5224203A (en) 1990-08-03 1993-06-29 E. I. Du Pont De Nemours & Co., Inc. On-line process control neural network using data pointers
US5175678A (en) 1990-08-15 1992-12-29 Elsag International B.V. Method and procedure for neural control of dynamic processes
US5340271A (en) 1990-08-18 1994-08-23 Rolls-Royce Plc Flow control method and means
US5130936A (en) 1990-09-14 1992-07-14 Arinc Research Corporation Method and apparatus for diagnostic testing including a neural network for determining testing sufficiency
ES2112853T3 (es) 1990-10-10 1998-04-16 Honeywell Inc Identificacion de sistemas de proceso.
US5367612A (en) 1990-10-30 1994-11-22 Science Applications International Corporation Neurocontrolled adaptive process control system
JP3189326B2 (ja) 1990-11-21 2001-07-16 セイコーエプソン株式会社 生産管理装置および該装置を用いた生産管理方法
US5265031A (en) 1990-11-26 1993-11-23 Praxair Technology, Inc. Diagnostic gas monitoring process utilizing an expert system
US5094109A (en) 1990-12-06 1992-03-10 Rosemount Inc. Pressure transmitter with stress isolation depression
JP3128832B2 (ja) 1991-01-23 2001-01-29 株式会社日立製作所 プラント診断装置及びプラント診断方法
US5214582C1 (en) 1991-01-30 2001-06-26 Edge Diagnostic Systems Interactive diagnostic system for an automobile vehicle and method
US5143452A (en) 1991-02-04 1992-09-01 Rockwell International Corporation System for interfacing a single sensor unit with multiple data processing modules
DE69228803T2 (de) 1991-02-05 1999-08-05 Storage Technology Corp., Louisville, Col. Wartungs-vorrichtung und verfahren ausgelöst durch wissenbasiertemaschine
JP2636527B2 (ja) 1991-03-04 1997-07-30 三菱電機株式会社 電気機器収納装置の絶縁劣化防止及び絶縁劣化予測診断装置
JPH07112299B2 (ja) 1991-03-07 1995-11-29 横河電機株式会社 プロセス信号受信装置
US5137370A (en) 1991-03-25 1992-08-11 Delta M Corporation Thermoresistive sensor system
US5357449A (en) 1991-04-26 1994-10-18 Texas Instruments Incorporated Combining estimates using fuzzy sets
US5251469A (en) 1991-04-29 1993-10-12 Rockwell International Corporation Calibration system
AU1893392A (en) 1991-05-03 1992-12-21 Storage Technology Corporation Knowledge based resource management
US5114664A (en) 1991-05-06 1992-05-19 General Electric Company Method for in situ evaluation of capacitive type pressure transducers in a nuclear power plant
US5195098A (en) * 1991-05-10 1993-03-16 Echelon Corporation Binary data error correction using hint signal
US5671335A (en) 1991-05-23 1997-09-23 Allen-Bradley Company, Inc. Process optimization using a neural network
US5317520A (en) 1991-07-01 1994-05-31 Moore Industries International Inc. Computerized remote resistance measurement system with fault detection
JP3182807B2 (ja) 1991-09-20 2001-07-03 株式会社日立製作所 多機能流体計測伝送装置及びそれを用いた流体量計測制御システム
US5365787A (en) 1991-10-02 1994-11-22 Monitoring Technology Corp. Noninvasive method and apparatus for determining resonance information for rotating machinery components and for anticipating component failure from changes therein
US5414645A (en) 1991-10-25 1995-05-09 Mazda Motor Corporation Method of fault diagnosis in an apparatus having sensors
US5327357A (en) 1991-12-03 1994-07-05 Praxair Technology, Inc. Method of decarburizing molten metal in the refining of steel using neural networks
DE69210041T2 (de) 1991-12-13 1996-10-31 Honeywell Inc Entwurf von piezoresistivem drucksensor aus silizium
US5365423A (en) 1992-01-08 1994-11-15 Rockwell International Corporation Control system for distributed sensors and actuators
US5282131A (en) 1992-01-21 1994-01-25 Brown And Root Industrial Services, Inc. Control system for controlling a pulp washing system using a neural network controller
US5349541A (en) 1992-01-23 1994-09-20 Electric Power Research Institute, Inc. Method and apparatus utilizing neural networks to predict a specified signal value within a multi-element system
EP0565761B1 (en) 1992-04-15 1997-07-09 Mita Industrial Co. Ltd. An image forming apparatus provided with self-diagnosis system
GB9208704D0 (en) 1992-04-22 1992-06-10 Foxboro Ltd Improvements in and relating to sensor units
JP2783059B2 (ja) 1992-04-23 1998-08-06 株式会社日立製作所 プロセス状態検出装置、及び半導体センサおよびその状態表示装置
ES2046114B1 (es) 1992-05-08 1995-08-01 Iberditan Sa Sistema de control automatico de compactacion en prensas.
JP3100757B2 (ja) 1992-06-02 2000-10-23 三菱電機株式会社 監視診断装置
FR2692037B1 (fr) 1992-06-03 1997-08-08 Thomson Csf Procede de diagnostic d'un processus evolutif.
CA2097558C (en) 1992-06-16 2001-08-21 William B. Kilgore Directly connected display of process control system in an open systems windows environment
JPH0695882B2 (ja) 1992-07-06 1994-11-30 ふみ子 斉藤 発酵茶飲料
DE59302704D1 (de) 1992-08-22 1996-06-27 Claas Ohg Vorrichtung zur messung eines massestromes
US5384699A (en) 1992-08-24 1995-01-24 Associated Universities, Inc. Preventive maintenance system for the photomultiplier detector blocks of pet scanners
US5477444A (en) 1992-09-14 1995-12-19 Bhat; Naveen V. Control system using an adaptive neural network for target and path optimization for a multivariable, nonlinear process
US5347843A (en) 1992-09-23 1994-09-20 Korr Medical Technologies Inc. Differential pressure flowmeter with enhanced signal processing for respiratory flow measurement
US5644240A (en) 1992-09-30 1997-07-01 Cobe Laboratories, Inc. Differential conductivity hemodynamic monitor
US5469070A (en) 1992-10-16 1995-11-21 Rosemount Analytical Inc. Circuit for measuring source resistance of a sensor
US5228780A (en) 1992-10-30 1993-07-20 Martin Marietta Energy Systems, Inc. Dual-mode self-validating resistance/Johnson noise thermometer system
US5388465A (en) 1992-11-17 1995-02-14 Yamatake-Honeywell Co., Ltd. Electromagnetic flowmeter
AT399235B (de) 1992-12-24 1995-04-25 Vaillant Gmbh Verfahren zur funktionskontrolle eines temperaturfühlers
US5486996A (en) 1993-01-22 1996-01-23 Honeywell Inc. Parameterized neurocontrollers
JP3170381B2 (ja) 1993-02-12 2001-05-28 オムロン株式会社 電池の寿命判定装置
US5392293A (en) 1993-02-26 1995-02-21 At&T Corp. Built-in current sensor for IDDQ testing
JPH06248224A (ja) 1993-02-27 1994-09-06 Toagosei Chem Ind Co Ltd フッ素樹脂塗料組成物
US5790413A (en) 1993-03-22 1998-08-04 Exxon Chemical Patents Inc. Plant parameter detection by monitoring of power spectral densities
US5394341A (en) 1993-03-25 1995-02-28 Ford Motor Company Apparatus for detecting the failure of a sensor
US5774378A (en) 1993-04-21 1998-06-30 The Foxboro Company Self-validating sensors
AU6669594A (en) 1993-04-30 1994-11-21 Pavilion Technologies, Inc. Method and apparatus for determining the sensitivity of inputs to a neural network on output parameters
FR2705155A1 (fr) 1993-05-12 1994-11-18 Philips Laboratoire Electroniq Dispositif et méthode pour générer une fonction d'approximation.
US5510779A (en) 1993-06-04 1996-04-23 Drexelbrook Controls, Inc. Error compensating instrument system with digital communications
US5410495A (en) 1993-07-20 1995-04-25 Texas Instruments Incorporated Apparatus, systems, and methods for diagnosing anomalous mass flow controller operation
US5361628A (en) 1993-08-02 1994-11-08 Ford Motor Company System and method for processing test measurements collected from an internal combustion engine for diagnostic purposes
US5386373A (en) 1993-08-05 1995-01-31 Pavilion Technologies, Inc. Virtual continuous emission monitoring system with sensor validation
US5539638A (en) 1993-08-05 1996-07-23 Pavilion Technologies, Inc. Virtual emissions monitor for automobile
JP2546159B2 (ja) 1993-08-05 1996-10-23 日本電気株式会社 生産管理システム
US5549137A (en) 1993-08-25 1996-08-27 Rosemount Inc. Valve positioner with pressure feedback, dynamic correction and diagnostics
US5404064A (en) 1993-09-02 1995-04-04 The United States Of America As Represented By The Secretary Of The Navy Low-frequency electrostrictive ceramic plate voltage sensor
BR9407400A (pt) 1993-09-07 1996-11-05 Rosemount Inc Transmissor bifilar
US5481200A (en) 1993-09-15 1996-01-02 Rosemont Inc. Field transmitter built-in test equipment
US5489831A (en) 1993-09-16 1996-02-06 Honeywell Inc. Pulse width modulating motor controller
US5481199A (en) 1993-09-24 1996-01-02 Anderson; Karl F. System for improving measurement accuracy of transducer by measuring transducer temperature and resistance change using thermoelectric voltages
US5408406A (en) 1993-10-07 1995-04-18 Honeywell Inc. Neural net based disturbance predictor for model predictive control
US5442639A (en) 1993-10-12 1995-08-15 Ship Star Associates, Inc. Method and apparatus for monitoring a communications network
US5610324A (en) 1993-11-08 1997-03-11 Fugitive Emissions Detection Devices, Inc. Fugitive emissions indicating device
CH687047A5 (de) 1993-11-30 1996-08-30 Hler Ag B Verfahren zur Regelung einer Arbeitsmaschine
JP2893233B2 (ja) 1993-12-09 1999-05-17 株式会社ユニシアジェックス 筒内圧センサの診断装置
US5526293A (en) 1993-12-17 1996-06-11 Texas Instruments Inc. System and method for controlling semiconductor wafer processing
US5764539A (en) 1994-01-21 1998-06-09 Novartis Nutrition Ag Non-invasive system and method for a fluid flow monitoring system
JPH07225530A (ja) 1994-02-15 1995-08-22 Canon Inc 画像記録用熱定着器の診断装置および画像記録装置
US5440478A (en) 1994-02-22 1995-08-08 Mercer Forge Company Process control method for improving manufacturing operations
SG50698A1 (en) 1994-02-23 1998-07-20 Rosemount Inc Field transmitter for storing information
JPH07234988A (ja) 1994-02-23 1995-09-05 Mitsubishi Heavy Ind Ltd 異常診断装置
US5434774A (en) 1994-03-02 1995-07-18 Fisher Controls International, Inc. Interface apparatus for two-wire communication in process control loops
US5436705A (en) 1994-04-18 1995-07-25 Xerox Corporation Adaptive process controller for electrophotographic printing
JP3139597B2 (ja) 1994-04-27 2001-03-05 横河電機株式会社 圧力測定装置における導圧管の詰まり診断装置
US5528516A (en) 1994-05-25 1996-06-18 System Management Arts, Inc. Apparatus and method for event correlation and problem reporting
FR2720498B1 (fr) 1994-05-27 1996-08-09 Schlumberger Services Petrol Débitmètre multiphasique.
US5629870A (en) 1994-05-31 1997-05-13 Siemens Energy & Automation, Inc. Method and apparatus for predicting electric induction machine failure during operation
RU2056506C1 (ru) 1994-06-29 1996-03-20 Московский энергетический институт (Технический университет) Способ определения технического состояния системы автоматического регулирования турбоагрегата
US5483387A (en) 1994-07-22 1996-01-09 Honeywell, Inc. High pass optical filter
JPH0854923A (ja) 1994-08-10 1996-02-27 Idemitsu Material Kk プロセスデータ診断方法および診断装置
US5533383A (en) 1994-08-18 1996-07-09 General Electric Company Integrated acoustic leak detection processing system
US5608650A (en) 1994-08-19 1997-03-04 Spectrel Partners, L.L.C. Systems and methods for testing pump flow rates
US5623605A (en) 1994-08-29 1997-04-22 Lucent Technologies Inc. Methods and systems for interprocess communication and inter-network data transfer
US5669713A (en) 1994-09-27 1997-09-23 Rosemount Inc. Calibration of process control temperature transmitter
JPH08102241A (ja) 1994-09-30 1996-04-16 Toshiba Corp 負荷制御装置
AU3617695A (en) 1994-10-08 1996-05-02 Honeywell S.A. Transmitter sensor
JPH08114638A (ja) 1994-10-14 1996-05-07 Meidensha Corp 機器異常診断装置
EP0788627B1 (en) 1994-10-24 1999-12-15 Fisher-Rosemount Systems, Inc. Apparatus for providing access to field devices in a distributed control system
DE59407059D1 (de) 1994-10-25 1998-11-12 Rieter Ingolstadt Spinnerei Backplane-Steuerung für Spinnereimaschine
US5704011A (en) 1994-11-01 1997-12-30 The Foxboro Company Method and apparatus for providing multivariable nonlinear control
JP3129121B2 (ja) 1994-11-10 2001-01-29 横河電機株式会社 管路閉塞検出装置
US5551306A (en) 1994-12-06 1996-09-03 Hersey Measurement Company Magnetic flowmeter
JP2682478B2 (ja) 1994-12-12 1997-11-26 日本電気株式会社 チップ状固体電解コンデンサ及びその製造方法
JPH08166309A (ja) 1994-12-13 1996-06-25 Yokogawa Electric Corp 導圧管の詰まり診断機構付き差圧測定装置
EP0749057B1 (en) 1994-12-28 2003-12-03 Omron Corporation Method and system for inference using hierarchy model, and method and system for control
US5570034A (en) 1994-12-29 1996-10-29 Intel Corporation Using hall effect to monitor current during IDDQ testing of CMOS integrated circuits
US5600148A (en) 1994-12-30 1997-02-04 Honeywell Inc. Low power infrared scene projector array and method of manufacture
US5572438A (en) 1995-01-05 1996-11-05 Teco Energy Management Services Engery management and building automation system
DE19502499A1 (de) 1995-01-27 1996-08-01 Pepperl & Fuchs Bussystem zur Steuerung und Aktivierung von miteinander vernetzten ASI-Slaves, vorzugsweise binäre Sensoren oder Eingangsmodule und/oder Ausgangsmodule oder Aktuatoren eines Aktuator-Sensor-Interface
US5887657A (en) 1995-02-09 1999-03-30 Baker Hughes Incorporated Pressure test method for permanent downhole wells and apparatus therefore
US5637802A (en) 1995-02-28 1997-06-10 Rosemount Inc. Capacitive pressure sensor for a pressure transmitted where electric field emanates substantially from back sides of plates
US5731522A (en) 1997-03-14 1998-03-24 Rosemount Inc. Transmitter with isolation assembly for pressure sensor
US5672247A (en) 1995-03-03 1997-09-30 Union Camp Patent Holding, Inc. Control scheme for rapid pulp delignification and bleaching
JP3746089B2 (ja) 1995-03-14 2006-02-15 松下冷機株式会社 圧縮機の性能劣化診断装置
US5708585A (en) 1995-03-20 1998-01-13 General Motors Corporation Combustible gas measurement
US6151560A (en) 1995-03-27 2000-11-21 Jones; Thaddeus M. Open circuit failure monitoring apparatus for controlled electrical resistance heaters
US5600942A (en) * 1995-03-31 1997-02-11 New Holland North America, Inc. Adaptive thresholding for metal detection
US5572420A (en) 1995-04-03 1996-11-05 Honeywell Inc. Method of optimal controller design for multivariable predictive control utilizing range control
US5650943A (en) 1995-04-10 1997-07-22 Leak Detection Services, Inc. Apparatus and method for testing for valve leaks by differential signature method
JPH08313466A (ja) 1995-05-17 1996-11-29 Chino Corp 熱電対劣化検知装置
SE510296C2 (sv) 1995-05-22 1999-05-10 Jerker Delsing Sätt och anordningar vid mätning av flöde
GB2301901B (en) 1995-06-05 1999-04-07 Nippon Denso Co Apparatus and method for diagnosing degradation or malfunction of oxygen sensor
US5741074A (en) 1995-06-06 1998-04-21 Thermo Electrioc Corporation Linear integrated sensing transmitter sensor
BR9609268A (pt) 1995-06-06 1999-05-11 Rosemount Inc Transmissor de temperatura e processo de medição de temperatura
US5650777A (en) 1995-06-07 1997-07-22 Rosemount Inc. Conversion circuit for process control system
US5561599A (en) 1995-06-14 1996-10-01 Honeywell Inc. Method of incorporating independent feedforward control in a multivariable predictive controller
JPH095092A (ja) 1995-06-16 1997-01-10 Maspro Denkoh Corp 移動体位置検出装置
US5742845A (en) 1995-06-22 1998-04-21 Datascape, Inc. System for extending present open network communication protocols to communicate with non-standard I/O devices directly coupled to an open network
US5578763A (en) 1995-06-22 1996-11-26 The Trustees Of Columbia University In The City Of New York Electromagnetic flow meter
US5555190A (en) 1995-07-12 1996-09-10 Micro Motion, Inc. Method and apparatus for adaptive line enhancement in Coriolis mass flow meter measurement
US5745049A (en) 1995-07-20 1998-04-28 Yokogawa Electric Corporation Wireless equipment diagnosis system
US5736649A (en) 1995-08-23 1998-04-07 Tokico Ltd. Vortex flowmeter
US5705978A (en) 1995-09-29 1998-01-06 Rosemount Inc. Process control transmitter
JP3263296B2 (ja) 1995-10-26 2002-03-04 株式会社東芝 電磁流量計
ES2139985T3 (es) 1995-10-26 2000-02-16 Flowtec Ag Sensor de caudal segun el principio de coriolis con un solo tubo de medida.
US5956484A (en) 1995-12-13 1999-09-21 Immersion Corporation Method and apparatus for providing force feedback over a computer network
WO1997021157A1 (en) 1995-12-06 1997-06-12 Honeywell Inc. A method of predictive maintenance of a process control system haivng fluid movement
US5940290A (en) 1995-12-06 1999-08-17 Honeywell Inc. Method of predictive maintenance of a process control system having fluid movement
CA2165400C (en) 1995-12-15 1999-04-20 Jean Serodes Method of predicting residual chlorine in water supply systems
FR2742861B1 (fr) 1995-12-22 1998-03-13 Naphtachimie Sa Procede et dispositif de mesure de vibrations
US6014902A (en) 1995-12-28 2000-01-18 The Foxboro Company Magnetic flowmeter with diagnostics
US5746511A (en) 1996-01-03 1998-05-05 Rosemount Inc. Temperature transmitter with on-line calibration using johnson noise
US5700090A (en) 1996-01-03 1997-12-23 Rosemount Inc. Temperature sensor transmitter with sensor sheath lead
US5817950A (en) 1996-01-04 1998-10-06 Rosemount Inc. Flow measurement compensation technique for use with an averaging pitot tube type primary element
CZ222098A3 (cs) 1996-01-17 1999-05-12 Siemens Aktiengesellschaft Automatizační zařízení
DE29600609U1 (de) 1996-01-17 1997-02-13 Siemens AG, 80333 München Automatisierungsgerät
US5801689A (en) 1996-01-22 1998-09-01 Extended Systems, Inc. Hypertext based remote graphic user interface control system
US6094600A (en) 1996-02-06 2000-07-25 Fisher-Rosemount Systems, Inc. System and method for managing a transaction database of records of changes to field device configurations
US6209048B1 (en) 1996-02-09 2001-03-27 Ricoh Company, Ltd. Peripheral with integrated HTTP server for remote access using URL's
US5764891A (en) 1996-02-15 1998-06-09 Rosemount Inc. Process I/O to fieldbus interface circuit
US5665899A (en) 1996-02-23 1997-09-09 Rosemount Inc. Pressure sensor diagnostics in a process transmitter
US6907383B2 (en) 1996-03-28 2005-06-14 Rosemount Inc. Flow diagnostic system
US7085610B2 (en) 1996-03-28 2006-08-01 Fisher-Rosemount Systems, Inc. Root cause diagnostics
US6017143A (en) 1996-03-28 2000-01-25 Rosemount Inc. Device in a process system for detecting events
US7949495B2 (en) 1996-03-28 2011-05-24 Rosemount, Inc. Process variable transmitter with diagnostics
US7630861B2 (en) 1996-03-28 2009-12-08 Rosemount Inc. Dedicated process diagnostic device
US8290721B2 (en) 1996-03-28 2012-10-16 Rosemount Inc. Flow measurement diagnostics
US6539267B1 (en) 1996-03-28 2003-03-25 Rosemount Inc. Device in a process system for determining statistical parameter
US6654697B1 (en) 1996-03-28 2003-11-25 Rosemount Inc. Flow measurement with diagnostics
US7254518B2 (en) 1996-03-28 2007-08-07 Rosemount Inc. Pressure transmitter with diagnostics
US5909368A (en) 1996-04-12 1999-06-01 Fisher-Rosemount Systems, Inc. Process control system using a process control strategy distributed among multiple control elements
IE76714B1 (en) 1996-04-19 1997-10-22 Auro Environmental Ltd Apparatus for measuring the velocity of a fluid flowing in a conduit
US5710370A (en) 1996-05-17 1998-01-20 Dieterich Technology Holding Corp. Method for calibrating a differential pressure fluid flow measuring system
US5708211A (en) 1996-05-28 1998-01-13 Ohio University Flow regime determination and flow measurement in multiphase flow pipelines
US5752008A (en) 1996-05-28 1998-05-12 Fisher-Rosemount Systems, Inc. Real-time process control simulation method and apparatus
US5805442A (en) 1996-05-30 1998-09-08 Control Technology Corporation Distributed interface architecture for programmable industrial control systems
US5728947A (en) 1996-06-12 1998-03-17 Asahi/America, Inc. Ultrasonic vortex flowmeter having clamp-on housing
US5668322A (en) 1996-06-13 1997-09-16 Rosemount Inc. Apparatus for coupling a transmitter to process fluid having a sensor extension selectively positionable at a plurality of angles
DE19624929C2 (de) 1996-06-21 2001-08-02 Siemens Ag Prozeßautomatisierungssystem
US5680109A (en) 1996-06-21 1997-10-21 The Foxboro Company Impulse line blockage detector systems and methods
US5781024A (en) 1996-07-26 1998-07-14 Diametrics Medical, Inc. Instrument performance verification system
EP0825506B1 (en) 1996-08-20 2013-03-06 Invensys Systems, Inc. Methods and apparatus for remote process control
US5854994A (en) 1996-08-23 1998-12-29 Csi Technology, Inc. Vibration monitor and transmission system
US5713668A (en) 1996-08-23 1998-02-03 Accutru International Corporation Self-verifying temperature sensor
DE19634997C2 (de) 1996-08-30 1999-08-05 Voith Sulzer Papiermasch Gmbh Regeleinrichtung mit einer Sensoren-Mehrzahl
US6023399A (en) 1996-09-24 2000-02-08 Hitachi, Ltd. Decentralized control system and shutdown control apparatus
US5857777A (en) 1996-09-25 1999-01-12 Claud S. Gordon Company Smart temperature sensing device
US5936514A (en) 1996-09-27 1999-08-10 Rosemount Inc. Power supply input circuit for field instrument
AU4744297A (en) 1996-10-04 1998-04-24 Fisher Controls International Inc. Maintenance interface device for use in a process control network
US5970430A (en) 1996-10-04 1999-10-19 Fisher Controls International, Inc. Local device and process diagnostics in a process control network having distributed control functions
DE19640937B4 (de) 1996-10-04 2013-11-28 Robert Bosch Gmbh Vorrichtung zur Überwachung der Meßwerterfassung bei einer Motorsteuerung
US6006338A (en) 1996-10-04 1999-12-21 Rosemont Inc. Process transmitter communication circuit
US6047222A (en) 1996-10-04 2000-04-04 Fisher Controls International, Inc. Process control network with redundant field devices and buses
WO1998014852A1 (en) 1996-10-04 1998-04-09 Fisher Controls International, Inc. A network accessible interface for a process control network
US5734975A (en) * 1996-10-24 1998-03-31 Motorola, Inc. Direct-coupled signaling receiver with PL/DPL detector
US5859964A (en) 1996-10-25 1999-01-12 Advanced Micro Devices, Inc. System and method for performing real time data acquisition, process modeling and fault detection of wafer fabrication processes
US5956487A (en) 1996-10-25 1999-09-21 Hewlett-Packard Company Embedding web access mechanism in an appliance for user interface functions including a web server and web browser
US6041287A (en) 1996-11-07 2000-03-21 Reliance Electric Industrial Company System architecture for on-line machine diagnostics
US6434504B1 (en) 1996-11-07 2002-08-13 Rosemount Inc. Resistance based process control device diagnostics
US6601005B1 (en) 1996-11-07 2003-07-29 Rosemount Inc. Process device diagnostics using process variable sensor signal
US6754601B1 (en) 1996-11-07 2004-06-22 Rosemount Inc. Diagnostics for resistive elements of process devices
US5828567A (en) 1996-11-07 1998-10-27 Rosemount Inc. Diagnostics for resistance based transmitter
US6519546B1 (en) 1996-11-07 2003-02-11 Rosemount Inc. Auto correcting temperature transmitter with resistance based sensor
US5956663A (en) 1996-11-07 1999-09-21 Rosemount, Inc. Signal processing technique which separates signal components in a sensor for sensor diagnostics
US6449574B1 (en) 1996-11-07 2002-09-10 Micro Motion, Inc. Resistance based process control device diagnostics
US5719378A (en) 1996-11-19 1998-02-17 Illinois Tool Works, Inc. Self-calibrating temperature controller
US5869772A (en) 1996-11-27 1999-02-09 Storer; William James A. Vortex flowmeter including cantilevered vortex and vibration sensing beams
IT1286007B1 (it) 1996-11-28 1998-06-26 Sgs Thomson Microelectronics Misuratore di flusso di un fluido
US5854993A (en) 1996-12-10 1998-12-29 Caterpillar Inc. Component machine testing using neural network processed vibration data analysis
JPH10187224A (ja) 1996-12-25 1998-07-14 Smc Corp 自動コントロールシステム
WO1998029785A1 (en) 1996-12-31 1998-07-09 Rosemount Inc. Device in a process system for validating a control signal from a field device
JPH10198657A (ja) 1997-01-08 1998-07-31 Toshiba Corp 信号処理装置
DE19703359A1 (de) 1997-01-30 1998-08-06 Telefunken Microelectron Verfahren zur Temperaturkompensation bei Meßsystemen
JPH10232170A (ja) 1997-02-20 1998-09-02 Chino Corp 熱電対劣化予測装置
EP0965092A4 (en) 1997-03-04 2002-10-30 Emerson Electric Co DISTRIBUTED DIAGNOSTIC SYSTEM
JPH10261185A (ja) 1997-03-19 1998-09-29 Hitachi Ltd 入出力混在形信号変換器
US6059254A (en) 1997-03-27 2000-05-09 Rosemount Inc. Process instrument mount
US6002952A (en) 1997-04-14 1999-12-14 Masimo Corporation Signal processing apparatus and method
GB2324606B (en) 1997-04-25 2002-01-16 Kent Meters Ltd Electromagnetic flowmeter
US5848383A (en) 1997-05-06 1998-12-08 Integrated Sensor Solutions System and method for precision compensation for the nonlinear offset and sensitivity variation of a sensor with temperature
DE19724167C2 (de) 1997-06-07 1999-07-15 Deutsch Zentr Luft & Raumfahrt Verfahren und Vorrichtung zum Ermitteln eines Meßwerts einer Zielmeßgröße einer Mehr-Phasen-Strömung
NL1006366C2 (nl) 1997-06-20 1998-12-22 Meco Equip Eng Werkwijze en inrichting voor het hechten van soldeerballen aan een substraat.
US5923557A (en) 1997-08-01 1999-07-13 Hewlett-Packard Company Method and apparatus for providing a standard interface to process control devices that are adapted to differing field-bus protocols
US5995910A (en) 1997-08-29 1999-11-30 Reliance Electric Industrial Company Method and system for synthesizing vibration data
US6282454B1 (en) 1997-09-10 2001-08-28 Schneider Automation Inc. Web interface to a programmable controller
JP3326714B2 (ja) 1997-09-10 2002-09-24 株式会社山武 電磁流量計
DE19742716C5 (de) 1997-09-26 2005-12-01 Phoenix Contact Gmbh & Co. Kg Steuer- und Datenübertragungsanlage und Verfahren zum Übertragen von sicherheitsbezogenen Daten
US6014612A (en) 1997-10-02 2000-01-11 Fisher Controls International, Inc. Remote diagnostics in a process control network having distributed control functions
WO1999019782A1 (en) 1997-10-13 1999-04-22 Rosemount Inc. Communication technique for field devices in industrial processes
JPH11118657A (ja) 1997-10-21 1999-04-30 Cosmo Keiki:Kk ドリフト補正値算出装置及びこの算出装置を具備した洩れ検査装置
US7124646B2 (en) 1997-11-26 2006-10-24 Invensys Systems, Inc. Correcting for two-phase flow in a digital flowmeter
US6311136B1 (en) 1997-11-26 2001-10-30 Invensys Systems, Inc. Digital flowmeter
US6047244A (en) 1997-12-05 2000-04-04 Rosemount Inc. Multiple range transition method and apparatus for process control sensors
US6260004B1 (en) 1997-12-31 2001-07-10 Innovation Management Group, Inc. Method and apparatus for diagnosing a pump system
US6112131A (en) 1998-02-06 2000-08-29 Zellweger Uster, Inc. Gin process control
US5900801A (en) 1998-02-27 1999-05-04 Food Safety Solutions Corp. Integral master system for monitoring food service requirements for compliance at a plurality of food service establishments
US6199018B1 (en) 1998-03-04 2001-03-06 Emerson Electric Co. Distributed diagnostic system
US6016523A (en) 1998-03-09 2000-01-18 Schneider Automation, Inc. I/O modular terminal having a plurality of data registers and an identification register and providing for interfacing between field devices and a field master
US6139180A (en) 1998-03-27 2000-10-31 Vesuvius Crucible Company Method and system for testing the accuracy of a thermocouple probe used to measure the temperature of molten steel
US6283138B1 (en) 1998-04-24 2001-09-04 Anderson, Greenwood Lp Pressure relief valve monitoring device
US6072150A (en) 1998-05-27 2000-06-06 Beamworks Ltd. Apparatus and method for in-line soldering
FI114745B (fi) 1998-06-01 2004-12-15 Metso Automation Oy Kenttälaitteiden hallintajärjestelmä
FI108678B (fi) 1998-06-17 2002-02-28 Neles Controls Oy Kenttälaitteiden hallintajärjestelmä
US6615091B1 (en) 1998-06-26 2003-09-02 Eveready Battery Company, Inc. Control system and method therefor
US5965819A (en) 1998-07-06 1999-10-12 Csi Technology Parallel processing in a vibration analyzer
US6360277B1 (en) 1998-07-22 2002-03-19 Crydom Corporation Addressable intelligent relay
US6272438B1 (en) 1998-08-05 2001-08-07 Micro Motion, Inc. Vibrating conduit parameter sensors, methods and computer program products for generating residual-flexibility-compensated mass flow estimates
US6046642A (en) 1998-09-08 2000-04-04 Motorola, Inc. Amplifier with active bias compensation and method for adjusting quiescent current
US6738388B1 (en) 1998-09-10 2004-05-18 Fisher-Rosemount Systems, Inc. Shadow function block interface for use in a process control network
US6757665B1 (en) 1999-09-28 2004-06-29 Rockwell Automation Technologies, Inc. Detection of pump cavitation/blockage and seal failure via current signature analysis
US6289735B1 (en) 1998-09-29 2001-09-18 Reliance Electric Technologies, Llc Machine diagnostic system and method for vibration analysis
US6327914B1 (en) 1998-09-30 2001-12-11 Micro Motion, Inc. Correction of coriolis flowmeter measurements due to multiphase flows
FR2784193B1 (fr) 1998-10-05 2001-01-05 Texas Instruments France Mecanisme integre permettant une detection de defaillances par test automatique en temps reel pour un convertisseur analogique/numerique
GB9821972D0 (en) 1998-10-08 1998-12-02 Abb Kent Taylor Ltd Flowmeter logging
US6615149B1 (en) 1998-12-10 2003-09-02 Rosemount Inc. Spectral diagnostics in a magnetic flow meter
US6611775B1 (en) 1998-12-10 2003-08-26 Rosemount Inc. Electrode leakage diagnostics in a magnetic flow meter
IT1304079B1 (it) 1998-12-31 2001-03-07 Abb Research Ltd Dispositivo di collaudo per sistemi di controllo industriali
DE19905071A1 (de) 1999-02-08 2000-08-10 Siemens Ag Meßumformer sowie Verfahren zur Diagnose der Versorgung eines Meßumformers
US7206646B2 (en) 1999-02-22 2007-04-17 Fisher-Rosemount Systems, Inc. Method and apparatus for performing a function in a plant using process performance monitoring with process equipment monitoring and control
US6298454B1 (en) 1999-02-22 2001-10-02 Fisher-Rosemount Systems, Inc. Diagnostics in a process control system
WO2000050851A1 (en) 1999-02-25 2000-08-31 Rosemount Inc. Flow measurement with diagnostics
US6546814B1 (en) 1999-03-13 2003-04-15 Textron Systems Corporation Method and apparatus for estimating torque in rotating machinery
US6564268B1 (en) 1999-03-17 2003-05-13 Rosemount Inc. Fieldbus message queuing method and apparatus
JP2000278132A (ja) 1999-03-24 2000-10-06 Matsushita Electric Ind Co Ltd 多信号のクランプ装置
US6304828B1 (en) * 1999-04-02 2001-10-16 The United States Of America As Represented By The Secretary Of The Navy System and method for calibrating a signal detection threshold circuit
WO2000070417A1 (en) 1999-05-17 2000-11-23 The Foxboro Company Process control configuration system with parameterized objects
US6298308B1 (en) 1999-05-20 2001-10-02 Reid Asset Management Company Diagnostic network with automated proactive local experts
EP1058093B1 (de) 1999-05-29 2003-01-29 MTL Instruments GmbH Verfahren und Schaltungsanordnung zur Spannungsversorgung und Funktionsüberwachung zumindest eines Messwertumformers
US6356191B1 (en) 1999-06-17 2002-03-12 Rosemount Inc. Error compensation for a process fluid temperature transmitter
DE60014709T3 (de) 1999-07-01 2010-04-15 Rosemount Inc., Eden Prairie Zweidraht-sender mit selbstprüfung und niedriger leistung
US6915364B1 (en) 1999-07-02 2005-07-05 Fisher Rosemount Systems, Inc. Automatically downloaded link active schedule
DE19930660A1 (de) 1999-07-02 2001-01-11 Siemens Ag Verfahren zur Überwachung oder zur Installation neuer Programmcodes in einer industriellen Anlage
US6505517B1 (en) 1999-07-23 2003-01-14 Rosemount Inc. High accuracy signal processing for magnetic flowmeter
DE19936858C1 (de) 1999-08-05 2001-05-23 Siemens Ag Aktoranordnung, insbesondere zur Ansteuerung eines Einspritzventils einer Brennkraftmaschine
US6701274B1 (en) 1999-08-27 2004-03-02 Rosemount Inc. Prediction of error magnitude in a pressure transmitter
US6618745B2 (en) 1999-09-10 2003-09-09 Fisher Rosemount Systems, Inc. Linking device in a process control system that allows the formation of a control loop having function blocks in a controller and in field devices
EP1229956B1 (en) 1999-09-15 2007-01-10 Resmed Ltd. Patient-ventilator synchronization using dual phase sensors
US6556145B1 (en) 1999-09-24 2003-04-29 Rosemount Inc. Two-wire fluid temperature transmitter with thermocouple diagnostics
US6425038B1 (en) 1999-09-28 2002-07-23 Rockwell Automation Technologies, Inc. Conversion of desk-top operating system for real-time control using installable interrupt service routines
DE19947129A1 (de) 1999-09-30 2001-04-05 Siemens Ag Diagnosesystem und -verfahren, insbesondere für ein Ventil
DE29917651U1 (de) 1999-10-07 2000-11-09 Siemens AG, 80333 München Meßumformer sowie Prozeßleitsystem
US6567006B1 (en) 1999-11-19 2003-05-20 Flow Metrix, Inc. Monitoring vibrations in a pipeline network
EP1109374A3 (de) 1999-12-13 2001-06-27 TELEFONAKTIEBOLAGET LM ERICSSON (publ) Verfahren und Vorrichtung zur Durchführung von Netzwerkoperationen
US6561038B2 (en) 2000-01-06 2003-05-13 Rosemount Inc. Sensor with fluid isolation barrier
US6378364B1 (en) 2000-01-13 2002-04-30 Halliburton Energy Services, Inc. Downhole densitometer
FI110425B (fi) 2000-04-12 2003-01-31 Metso Paper Inc Menetelmä kiinnirullaimen toimintavarmuuden parantamiseksi
FI114507B (fi) 2000-07-07 2004-10-29 Metso Automation Oy Laitediagnostiikkajärjestelmä
DE10033586A1 (de) 2000-07-11 2002-01-24 Bosch Gmbh Robert Verfahren und Vorrichtung zur Fehlererkennung bzw. Diagnose
RU2190267C2 (ru) 2000-07-19 2002-09-27 Юркевич Геннадий Петрович Способ управления ядерным реактором
DE10036971A1 (de) 2000-07-28 2002-02-28 Siemens Ag Verfahren zur Ferndiagnose eines technologischen Prozesses
US6751560B1 (en) 2000-08-01 2004-06-15 The Charles Stark Draper Laboratory, Inc. Non-invasive pipeline inspection system
WO2002027418A2 (en) 2000-09-25 2002-04-04 Motorwiz, Inc. Model-based machine diagnostics and prognostics using theory of noise and communications
US6480793B1 (en) 2000-10-27 2002-11-12 Westinghouse Electric Company Lcl Flow condition monitor
US6648082B2 (en) 2000-11-07 2003-11-18 Halliburton Energy Services, Inc. Differential sensor measurement method and apparatus to detect a drill bit failure and signal surface operator
FI117143B (fi) 2000-11-30 2006-06-30 Metso Automation Oy Soodakattilan nuohousmenetelmä ja -laitteisto
US6493689B2 (en) 2000-12-29 2002-12-10 General Dynamics Advanced Technology Systems, Inc. Neural net controller for noise and vibration reduction
JP2002214185A (ja) 2001-01-16 2002-07-31 Nissin Electric Co Ltd センサ異常の検出方法及び検出装置
US6993445B2 (en) 2001-01-16 2006-01-31 Invensys Systems, Inc. Vortex flowmeter
US7389204B2 (en) 2001-03-01 2008-06-17 Fisher-Rosemount Systems, Inc. Data presentation system for abnormal situation prevention in a process plant
US6970003B2 (en) 2001-03-05 2005-11-29 Rosemount Inc. Electronics board life prediction of microprocessor-based transmitters
US6819292B2 (en) 2001-03-09 2004-11-16 Arad Measuring Technologies Ltd Meter register
US6912671B2 (en) 2001-05-07 2005-06-28 Bisher-Rosemount Systems, Inc Wiring fault detection, diagnosis and reporting for process control systems
US6859755B2 (en) 2001-05-14 2005-02-22 Rosemount Inc. Diagnostics for industrial process control and measurement systems
US7149597B2 (en) 2001-05-29 2006-12-12 John Billings Process control system and method
US6662120B2 (en) 2001-06-19 2003-12-09 Endress + Hauser Flowtec Ag Excitation circuits for coriolis mass flowmeters
US6772036B2 (en) 2001-08-30 2004-08-03 Fisher-Rosemount Systems, Inc. Control system using process model
US7168429B2 (en) 2001-10-12 2007-01-30 Ric Investments, Llc Auto-titration pressure support system and method of using same
CA2378791A1 (en) 2002-03-25 2003-09-25 Mcmaster University Method of detection of flow duct obstruction
DE10218830C1 (de) 2002-04-26 2003-12-18 Siemens Ag Diagnosesystem und -verfahren für ein Ventil
JP2004021712A (ja) 2002-06-18 2004-01-22 Yokogawa Electric Corp 設備診断支援システム
JP2004034112A (ja) 2002-07-05 2004-02-05 Hitachi Ltd 圧延設備の診断支援方法および診断支援システム
US7109883B2 (en) 2002-09-06 2006-09-19 Rosemount Inc. Low power physical layer for a bus in an industrial transmitter
US7039476B2 (en) * 2002-09-27 2006-05-02 Siemens Building Technologies, Inc. Control system with filtered dead zone
US7114516B2 (en) 2002-10-15 2006-10-03 Takasago Engineering Co., Ltd. Leak-detecting check valve, and leak-detection alarm system that uses said check valve
JP2004186445A (ja) 2002-12-03 2004-07-02 Omron Corp モデル化装置及びモデル解析方法並びにプロセス異常検出・分類システム及びプロセス異常検出・分類方法並びにモデル化システム及びモデル化方法並びに故障予知システム及びモデル化装置の更新方法
US7040179B2 (en) 2002-12-06 2006-05-09 Endress+ Hauser Flowtec Ag Process meter
US20040128034A1 (en) 2002-12-11 2004-07-01 Lenker Jay A. Method and apparatus for water flow sensing and control
US20040199361A1 (en) 2003-04-01 2004-10-07 Ching-Shan Lu Method and apparatus for equipment diagnostics and recovery with self-learning
US6904476B2 (en) 2003-04-04 2005-06-07 Rosemount Inc. Transmitter with dual protocol interface
RU2324171C2 (ru) 2003-07-18 2008-05-10 Роузмаунт Инк. Диагностика процесса
US7280048B2 (en) 2003-08-07 2007-10-09 Rosemount Inc. Process control loop current verification
US7018800B2 (en) 2003-08-07 2006-03-28 Rosemount Inc. Process device with quiescent current diagnostics
US7627441B2 (en) 2003-09-30 2009-12-01 Rosemount Inc. Process device with vibration based diagnostics
US7435581B2 (en) 2003-11-26 2008-10-14 Broadley-James Corporation Integrated bio-reactor monitor and control system
US7079558B2 (en) * 2003-12-01 2006-07-18 Excel/Quantronix, Inc. Mode-locked laser method and apparatus
US7523667B2 (en) 2003-12-23 2009-04-28 Rosemount Inc. Diagnostics of impulse piping in an industrial process
US7258021B2 (en) 2004-06-25 2007-08-21 Rosemount Inc. Process transmitter isolation assembly
US7036381B2 (en) 2004-06-25 2006-05-02 Rosemount Inc. High temperature pressure transmitter assembly
US7627455B2 (en) 2004-08-31 2009-12-01 Watlow Electric Manufacturing Company Distributed diagnostic operations system
US7181654B2 (en) 2004-09-17 2007-02-20 Fisher-Rosemount Systems, Inc. System and method for detecting an abnormal situation associated with a reactor
DE602005016310D1 (de) 2005-02-15 2009-10-08 Abb Research Ltd Diagnoseeinrichtung für ein prozesssteuersystem
US7577543B2 (en) 2005-03-11 2009-08-18 Honeywell International Inc. Plugged impulse line detection
CA2603916A1 (en) 2005-04-04 2006-10-12 Fisher-Rosemount Systems, Inc. Statistical processing methods used in abnormal situation detection
CN101208589A (zh) 2005-06-21 2008-06-25 Abb研究有限公司 用于过程控制系统的诊断设备
DE102005030612B4 (de) * 2005-06-30 2014-09-11 Infineon Technologies Ag Halteeinrichtung für ein Sensorsignal, Verfahren zum Weiterleiten eines Sensorsignals und Computerprogramm
JP2007040763A (ja) 2005-08-01 2007-02-15 Toyota Motor Corp 加速度センサの補正装置
JP4970820B2 (ja) 2006-03-27 2012-07-11 横河電機株式会社 導圧管詰まり検出装置及び導圧管詰まり検出方法
US7528737B2 (en) 2006-04-10 2009-05-05 Rosemount Inc. Temperature responsive indicators for process control instruments
US8606544B2 (en) 2006-07-25 2013-12-10 Fisher-Rosemount Systems, Inc. Methods and systems for detecting deviation of a process variable from expected values
US7778797B2 (en) 2006-09-28 2010-08-17 Fisher-Rosemount Systems, Inc. Method and system for detecting abnormal operation in a stirred vessel
US7891354B2 (en) * 2006-09-29 2011-02-22 Nellcor Puritan Bennett Llc Systems and methods for providing active noise control in a breathing assistance system
JP5336042B2 (ja) 2006-12-18 2013-11-06 オークマ株式会社 工作機械における温度センサの異常検知方法
US7770459B2 (en) 2007-07-20 2010-08-10 Rosemount Inc. Differential pressure diagnostic for process fluid pulsations
US7698077B2 (en) * 2007-11-09 2010-04-13 Applied Micro Circuits Corporation System and method for signal level detection
JP5003516B2 (ja) * 2008-01-31 2012-08-15 横河電機株式会社 通信装置
JP4999789B2 (ja) * 2008-06-27 2012-08-15 アズビル株式会社 フィールド機器
RU2384837C1 (ru) 2008-11-20 2010-03-20 Евгений Валерьевич Степанов Способ одновременного определения концентрации молекул со и co2 и устройство для одновременного определения концентрации молекул со и co2
US8408787B2 (en) 2009-01-09 2013-04-02 Rosemount Inc. Process temperature transmitter with improved temperature calculation
JP2011202998A (ja) * 2010-03-24 2011-10-13 Panasonic Electric Works Co Ltd ドップラセンサ装置
US8864378B2 (en) 2010-06-07 2014-10-21 Rosemount Inc. Process variable transmitter with thermocouple polarity detection
US8449181B2 (en) 2010-08-26 2013-05-28 Rosemount Inc. Process fluid temperature measurement
US9207670B2 (en) 2011-03-21 2015-12-08 Rosemount Inc. Degrading sensor detection implemented within a transmitter
US8378872B2 (en) 2011-03-31 2013-02-19 Rosemount Inc. Dynamically adjusted A/D resolution
US9020768B2 (en) 2011-08-16 2015-04-28 Rosemount Inc. Two-wire process control loop current diagnostics
US20130080084A1 (en) 2011-09-28 2013-03-28 John P. Miller Pressure transmitter with diagnostics
DE102013100045B4 (de) 2012-12-18 2022-07-14 Endress + Hauser Wetzer Gmbh + Co Kg Verfahren und Vorrichtung zur Bestimmung einer Prozessgröße

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3924068A (en) * 1973-12-27 1975-12-02 Nasa Low distortion receiver for bi-level baseband PCM waveforms
US6614271B1 (en) * 2002-06-13 2003-09-02 Intel Corporation Signal detect circuit for high speed data receivers
US20080208538A1 (en) * 2007-02-26 2008-08-28 Qualcomm Incorporated Systems, methods, and apparatus for signal separation
US20090309574A1 (en) * 2008-06-16 2009-12-17 Airbus France Device for counting oscillations of an oscillating temporal signal
US7821437B1 (en) * 2009-04-08 2010-10-26 Rosemount Inc. Line noise analysis and detection and measurement error reduction
CN102378917A (zh) * 2009-04-08 2012-03-14 罗斯蒙德公司 线路噪声分析和检测以及测量错误减少
US8311778B2 (en) * 2009-09-22 2012-11-13 Rosemount Inc. Industrial process control transmitter with multiple sensors
CN102410847A (zh) * 2010-08-11 2012-04-11 罗斯蒙德公司 噪声检测和避免
CN203148583U (zh) * 2012-09-28 2013-08-21 罗斯蒙德公司 过程变量变送器

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
卢剑等: "一种变送器电路的噪声分析与优化设计", 《中国集成电路》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105222912A (zh) * 2015-11-02 2016-01-06 沈阳航天新光集团有限公司 一种基于复合式数字滤波的发电机组温度检测系统
CN105222912B (zh) * 2015-11-02 2018-01-09 沈阳航天新光集团有限公司 一种基于复合式数字滤波的发电机组温度检测系统

Also Published As

Publication number Publication date
BR112015006400A2 (pt) 2017-07-04
CA2886533C (en) 2018-01-02
AU2013323856A1 (en) 2015-04-16
AU2013323856B2 (en) 2016-07-28
EP2901226A1 (en) 2015-08-05
CN103712707B (zh) 2017-04-12
JP2015530675A (ja) 2015-10-15
CA2886533A1 (en) 2014-04-03
CN203148583U (zh) 2013-08-21
EP2901226B1 (en) 2018-11-07
RU2015115909A (ru) 2016-11-20
US20140095095A1 (en) 2014-04-03
RU2609758C2 (ru) 2017-02-02
WO2014052232A1 (en) 2014-04-03
JP6039087B2 (ja) 2016-12-07
US9602122B2 (en) 2017-03-21

Similar Documents

Publication Publication Date Title
CN203148583U (zh) 过程变量变送器
JP6058134B2 (ja) センサのストレス診断を備えた工業プロセス温度伝送器
CN103376755B (zh) 过程变送器中的过程变量补偿
JP2012108128A (ja) メータの磁気改ざん検出のための方法、デバイス及びコンピュータプログラム成果物
CN203177991U (zh) 利用emf检测和校正的过程变量变送器
CN102954814B (zh) 双线过程控制环路电流诊断
US7496469B2 (en) Temperature sensor adaptors and methods
CN110631646B (zh) 支持流动不稳定性检测的漩涡流量计
KR101460158B1 (ko) 온도 변화에 강인한 휘스톤 브리지 최적화 장치 및 방법
KR101196755B1 (ko) 다중 유량대를 구분설정하여 유량을 측정하는 유량계
WO2019217361A1 (en) Supervisory monitor for energy measurement
WO2020205868A1 (en) System and method for non-invasive heat measurement
JP2017032525A (ja) 電磁流量計の変換器および履歴記録方法
JP2020176996A (ja) 電池寿命測定装置および測定方法
Odungide Self-Validating Sensors, Types and Uncertainty: A Literature Review

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
CB02 Change of applicant information

Address after: Minnesota, USA

Applicant after: Rosemount Inc.

Address before: Minnesota, USA

Applicant before: Rosemount Inc.

COR Change of bibliographic data
GR01 Patent grant
GR01 Patent grant