| 摘要 |
The claimed method and system may measure or receive signature data from a process control device, such as a valve, and analyze the data against user configurable boundaries and settings to determine if there is a problem wit h the operation of the control device. One or more signature graphs that wer e measured from a prior period may be displayed to a user to assist the user in configuring the characteristic boundaries and settings. The claimed meth od and system may evaluate a current signature graph against a user configur ed boundary to determine, among other characteristics, whether a maximum or minimum friction or torque threshold has been crossed, whether the integrity of an actuator or valve shaft has been compromised, and whether valve stick -slip occurrences are within a tolerance level.
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