摘要:
Diagnostic circuitry of a process device is used to detect degradation of a resistive element of the process device while the process device remains online, without the use of an additional power source. In addition, once degradation of the resistive element is detected, the diagnostic circuitry can be compensated for automatically. The diagnostic circuitry includes a testing circuit and a processing system. The testing circuit is coupled to the resistive element and is configured to apply a test signal to the resistive element. The test signal heats the resistive element and causes the resistive element to generate a response signal. The processing system compares a change in the response signal to a corresponding reference to detect degradation of the resistive element.
摘要:
A pressure transmitter with an output predicting the magnitude of error in the pressure transmitter's output. A pressure sensor is adapted to sense a process pressure. A controller coupled to the pressure sensor generates a transmitter output representing the process pressure. A memory stores predetermined data predicting magnitudes of transmitter output error as a function of cumulative excessive sensor output levels, and also stores a record of cumulative excessive sensor output levels. The controller calculates a predicted present magnitude of transmitter output error as a function of the accumulated record and the predetermined data, and generates the prediction output.
摘要:
A fluid flow meter diagnosing the condition of its primary element or impulse lines connecting to a differential pressure sensor. A difference circuit coupled to the differential pressure sensor has a difference output representing the sensed differential pressure minus a moving average. A calculate circuit receives the difference output and calculates a trained output of historical data obtained during an initial training time. The calculate circuit also calculates a monitor output of current data obtained during monitoring or normal operation of the fluid flow meter. A diagnostic circuit receives the trained output and the monitor put and generates a diagnostic output indicating a current condition of the primary element and impulse lines.
摘要:
A temperature transmitter and a process control system includes a sensor input for coupling to a temperature sensor having a temperature dependent resistance. The resistance measuring circuitry couples to the sensor input and provides a resistance output related to resistance of the temperature dependent resistance. Analog to digital conversion circuitry couples to the sensor input and provides a digital output related to AC signals across the sensor input. Digital signal processing circuitry isolates a Johnson noise component of the AC signals and provides a digitized Johnson noise output. Temperature measurement circuitry provides a calibrated temperature output based upon the resistance output and the digitized Johnson noise output. Output circuitry transmits the calibrated temperature output over the process control loop.
摘要:
A process plant data collection and organization system uses a common or integrated navigational tree structure to organize and enable a user to view and access information obtained from different applications or data sources within a process plant, even when those different applications have different manners of organizing or enabling users thereof to view the collected information. The integrated navigational tree may be developed from and may use the navigational tree categories of the different applications or may map the data within different categories of the navigational trees of the different applications into categories within the integrated navigational tree. The integrated navigational tree enables a user to view and access plant data collected or developed by different applications within the process plant in a single place and in an organized manner so that the user can view data related to the plant from a higher point of view than provided by any of the individual applications.
摘要:
In a railway network a method for linking at least one of train parameters, fuel efficiency emission efficiency, and load with network knowledge so that adjustments for network efficiency may be made as time progresses while a train is performing a mission. The method includes dividing the train mission into multiple sections with common intersection points, and calculating train operating parameters based on other trains in a railway network to determine optimized parameters over a certain section. The method further includes comparing optimized parameters to current operating parameters, and altering current operating parameters of the train to coincide with optimized parameters for at least one of the current track section and a pending track section.
摘要:
An events management system coordinates the exchange of device alert or alarm information between an asset management system and one or more business systems within a process control system or plant. The events management system receives device alerts from the asset management system and uses a rules-engine and one or more state machines to send notifications containing device alert information to one of more of the business systems.
摘要:
A system and method of collecting one of process control data and asset data from a plurality of data sources communicatively coupled to an open network stores location information associated with the plurality of data sources and periodically sends requests for process control information to each of the plurality of data sources by using the location information to communicate with each of the plurality of data sources via the open network. In addition, the system and method collects the process control data from messages received in response to the requests for process control information, aggregates the process control data to form aggregated process control data, and stores the aggregated process control data within a database. Additionally, the aggregated data is used in making decisions with regards to operation and maintenance of a process control system or a plant.
摘要:
A device for diagnosing operation of an industrial process control or monitoring system includes an input configured to receive an input related to a process signal. A first statistical parameter module provides a first statistical parameter output related to a statistical parameter of the process signal. A filter provides a filter output related to a filtered value of the process signal. A second statistical parameter module provides a second statistical parameter output related to a statistical parameter of the filter output. A diagnostic module diagnoses operation of the industrial process based upon the first and second statistical parameters.
摘要:
A system for gathering data associated with a process plant, in which parameters are generated by a plurality of signal processing data collection blocks, automatically determines parameters to be monitored. The signal processing data collection blocks may generate data such as statistical data, frequency analysis data, auto regression data, wavelets data, etc. Then, the system monitors the determined parameters.