Process variable transmitter with acceleration sensor
AssigneeRosemount Inc.
InventorsFred C. Sittler, Robert C. Hedtke
Life of this patent
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Abstract
A process variable transmitter for use in an industrial process control or monitoring system includes a transmitter housing and a process variable sensor having a sensor output related to a process variable. An accelerometer is coupled to the transmitter and provides an accelerometer output related to acceleration. Diagnostic circuitry provides a diagnostic output as a function of the sensor output and the accelerometer output.
Claims41
A process variable transmitter for use in an industrial process control or monitoring system, comprising:
- a process variable sensor in the process variable transmitter having a process variable sensor output related to a process variable;
- an accelerometer in the process variable transmitter and which is separate from the process variable sensor coupled to the transmitter having an accelerometer output related to acceleration;
- output circuitry configured to provide an output related to the sensed process variable;
- and
- diagnostic circuitry configured to:
- determine a ratio between the process variable output and the accelerometer output;
- diagnose a condition in the process based upon the ratio of the process variable sensor output and the accelerometer output and responsively provide a diagnostic output indicative of a diagnostic condition in the process.
A method of diagnosing a condition in an industrial process using a process variable transmitter in an industrial process control system, comprising:
- sensing accelerations applied to the transmitter using an accelerometer located in the transmitter and providing an accelerometer output;
- measuring a process variable with a process variable sensor separate from the accelerometer and located in the transmitter and providing a process variable sensor output;
- providing an output related to the sensed pressure variable;
- determining a ratio of the process variable sensor output and the accelerometer output;
- diagnosing a condition of the industrial process based upon the ratio of the process variable sensor output and the accelerometer output.
Dependencies are inferred from the claim text.