Hysteretic process variable sensor compensation
AssigneeRosemount Inc.
InventorCharles Ray Willcox
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Abstract
A process variable transmitter for sensing a process variable of an industrial process includes a process variable sensor configured to sense a current process variable of the industrial process. Measurement circuitry is configured to compensate the sensed process variable as a function of at least one previously sensed process variable characterized by a Hysteron basis function model. Output circuitry provides a transmitter output related to the compensated sensed process variable.
Claims31
A process variable transmitter for sensing a process variable of an industrial process, comprising:
- a process variable sensor configured to sense a current process variable of the industrial process;
- measurement circuitry configured to compensate the sensed current process variable as a function of at least one previously sensed process characterized using Hysteron basis functions;
- output circuitry configured to provide a process variable transmitter output related to the compensated sensed process variable.
The process variable transmitter of claim wherein Hysteron basis functions are used to compensate the sensed process variable through curve fitting.
A method of compensating a process variable output from a process variable sensor in an industrial process, comprising:
- sensing a current process variable of the industrial process using the process variable sensor;
- compensating the sensed current process variable as a function of at least one previously sensed process variable characterized by Hysteron basis functions;
- and
- providing an output related to the compensated sensed process variable.
Dependencies are inferred from the claim text.