Data processing: measuring – calibrating – or testing – Calibration or correction system – For mechanical system
Patent
1997-09-29
1999-10-12
Barlow, John
Data processing: measuring, calibrating, or testing
Calibration or correction system
For mechanical system
702 41, 73168, 36452817, G01M 1900
Patent
active
059666790
ABSTRACT:
An apparatus for nonobtrusively determining one or more parameters, such as dead band, dead time, or response time of a process control device that is connected on-line in a process control loop includes a measurement unit and a processing unit. The measurement unit is coupled to the process control loop to detect stochastic changes in a control signal sent to the process control device and to detect an indication of the response of the process control device to the changes in the control signal while the process control device is operating on-line. The processing unit calculates the device parameters from one or more sets of the detected changes in the control signal and the detected response indication.
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Grumstrup Bruce F.
Junk Kenneth W.
Snowbarger Jimmie L.
Taylor, Jr. Eugene R.
Barlow John
Fisher Controls International Inc.
Vo Hien
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