Communications: electrical – Continuously variable indicating – With calibration
Patent
1996-02-07
2000-02-15
Lee, Thomas D.
Communications: electrical
Continuously variable indicating
With calibration
324601, 324658, G08C 1506, G08C 1922, G01R 3500
Patent
active
060257873
ABSTRACT:
Apparatus and methods for calibrating a transducer measurement system having a plurality of subsystems, permitting total system calibration by a few selected adjustments without requiring complete system calibration when a new subsystem is added or a subsystem replaced and without requiring adjustments to be made to each individual subsystem. The measurement system provides a calibrated measurement signal indicative of a characteristic of an object with which the transducer interfaces. Each subsystem is characterized in terms of a minimum number of parameters associated therewith and the parameters are mathematically combined to reflect values of adjustable subsystem or system components. In this manner, variations associated with each separable subsystem from nominal, specified values, are combined and corrected by a single adjustment of a minimum number of selected adjustable components representing the degrees of freedom for errors in the system. In an alternate embodiment, a signal processor is responsive to the subsystem describing parameters for processing a digital replica of a measured signal to provide the calibrated measurement signal.
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Keller Scott P.
Mallory Roy
Poduje Noel S.
ADE Corporation
Lee Thomas D.
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