Methods and apparatus for pressure-based direct measurement of a final control element variable
AssigneeFisher Controls International LLC
InventorsJoseph Frank DeMonte, William Sean Raymond
Life of this patent
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Abstract
Methods and apparatus for pressure-based direct measurement of a final control element variable are disclosed. An example method includes receiving a signal from a first sensor mounted on a shaft of a valve, converting the signal to a pressure, routing the pressure to a second sensor of a controller operatively coupled to a pneumatic actuator, the pneumatic actuator operatively coupled to the shaft, and determining, by the controller, a first torque on the shaft based on the pressure.
Claims20
A method, comprising:
- receiving a signal from a first sensor mounted on a shaft of a valve;
- converting the signal to a pressure;
- routing the pressure to a second sensor of a controller operatively coupled to a pneumatic actuator, the pneumatic actuator operatively coupled to the shaft;
- and
- determining, by the controller, a first torque on the shaft based on the pressure.
An apparatus, comprising:
- a converter to:
- receive a signal from a first sensor mounted on a shaft of a valve;
- convert the signal to a pressure;
- and
- route the pressure to a second sensor;
- and
- a controller to:
- receive the pressure from the second sensor;
- and
- determine a first torque on the shaft based on the pressure,
- wherein the controller is operatively coupled to a pneumatic actuator,
- the pneumatic actuator operatively coupled to the shaft.
A non-transitory computer readable storage medium comprising instructions that, when executed, cause a machine to at least:
- receive a first pressure, the first pressure converted from a signal from a first sensor mounted on a shaft of a valve;
- determine a first torque on the shaft based on the first pressure;
- receive a second pressure, the second pressure provided to a pneumatic actuator operatively coupled to the valve;
- and
- determine a second torque on the shaft based on the second pressure.
Dependencies are inferred from the claim text.