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US 2018/0113446 A1Published application
Integration of online and offline control valve data
AssigneeFisher Controls International LLC
InventorShawn W. Anderson
Life of this patent
Estimating the term…
Abstract
An integrated diagnostics system utilizes online and offline diagnostics techniques to evaluate control valves found in process plant environments. The integrated diagnostics system improves on existing diagnostic systems, which typically rely exclusively on online diagnostics or offline diagnostics.
Claims21
A method comprising:
- receiving, by one or more processors, offline diagnostics data for a control valve, the offline diagnostics data describing a response of the control valve to a first control signal for a first range of travel when the control valve is not in service in a process plant;
- receiving, by the one or more processors, online diagnostics data for the control valve, the online diagnostics data describing a response of the control valve to a second control signal for a second range of travel when the control valve is in service in the process plant;
- using the offline diagnostics data and the online diagnostics data, generating a diagnostic metric indicative of at least one operational parameter of the control valve, by the one or more processors;
- and
- in response to determining that the diagnostic metric exceeds a threshold value, generating an indication to be provided to an operator via a user interface.
2 more elements
A system comprising:
- a control valve in a process plant;
- a plurality of sensors configured to monitor the control valve;
- and
- an integrated diagnostics system communicatively connected to the plurality of sensors, the diagnostics system configured to:
- receive, via the plurality of sensors, offline diagnostics data for the control valve, the offline diagnostics data describing a response of the control valve to a first control signal for a first range of travel when the control valve is not in service in the process plant;
- receive, via the plurality of sensors, online diagnostics data for the control valve, the online diagnostics data describing a response of the control valve to a second control signal for a second range of travel when the control valve is in service in the process plant;
- generate, using the offline diagnostics data and the online diagnostics data, a diagnostic metric indicative of at least one operational parameter of the control valve;
- and
- generate, in response to determining that the diagnostic metric exceeds a threshold value, an indication to be provided to an operator via a user interface.
6 more elements
A method comprising:
- initiating an offline diagnostics procedure on a control valve in a process plant, wherein the control valve is controlled through a range of travel;
- collecting, during the offline diagnostics procedure, offline diagnostics data from a plurality of sensors monitoring the control valve;
- calculating an offline response of the control valve utilizing the offline diagnostics data;
- collecting, during online operation of the control valve, online diagnostics data from the plurality of sensors monitoring the control valve;
- calculating a plurality of online responses for the control valve utilizing the online diagnostics data;
- for each of the plurality of online responses, calculating a value for a response ratio relating the offline response to one of the plurality of online responses;
- analyzing the values of the response ratio to determine a rate of change for the response ratio over time;
- and
- generating an indication to be provided to an operator via a user interface when the rate of change for the response ratio exceeds a threshold.
6 more elements
Dependencies are inferred from the claim text.