Control valve and positioner diagnostics
AssigneeDresser, Inc.
InventorsHenry W. Boger, Sandro Esposito
Life of this patent
Estimating the term…
Abstract
Valve positioning systems may include one or more components and a controller. Components may include one or more electric-to-pressure output converters, relays, gas supplies, and/or actuators. A controller may adjust a position of a valve by sending a signal. The valve positioning system may individually monitor components and determine the condition of each component being individually monitored. The valve positioning system may determine if a component will fail prior to failure and/or determine if a problem will occur in a component prior to the problem occurring.
Claims8
A valve positioning system comprising:
- at least two or more components, wherein at least one of the components comprises an electric-to-pressure output converter;
- and
- a controller configured to:
- adjust a position of a valve by sending a command signal to the electric-to-pressure output converter;
- individually monitor at least two of the components of the valve positioning system;
- determine the condition of one of the components being monitored;
- and
- adjust an input signal to at least one component of the valve positioning system such that a valve actuator is inhibited from responding to the input signal change;
- wherein individually monitoring at least two of the components comprises determining input and output signals for at least one of the components based on the adjusted input signal;
- and
- wherein the condition of one of the components being monitored is determined at least partially based on a comparison of the input signal and the output signal of the component.
A method performed by a valve positioning system comprising:
- individually monitoring at least two components of a valve positioning system, wherein one of the components comprises an electric-to-pressure output converter;
- determining the condition of each component being individually monitored;
- adjusting an input signal to at least one component of the valve positioning system such that a valve actuator is inhibited from responding to the input signal change;
- wherein individually monitoring at least two of the components comprises determining input and output signals for at least one of the components based on the adjusted input signal;
- and
- wherein the condition of one of the components being monitored is determined at least partially based on a comparison of the input signal and the output signal of the component.
A method performed by a valve positioning system comprising:
- adjusting an input signal to at least one component of a valve positioning system such that a valve actuator is inhibited from responding to the input signal change;
- determining input and output signals for at least one of the components based on the adjusted input signal;
- and
- determining a condition of at least one of the components at least partially based on a comparison of the determined input signal and the determined output signal of the component.
Dependencies are inferred from the claim text.