Method of and apparatus for the elimination of the effects of internal interference in force measurement systems, including touch - input computer and related displays employing touch force location measurement techniques
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United States of America Patent
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Oct 8, 1996
Grant Date -
N/A
app pub date -
Apr 30, 1993
filing date -
Apr 30, 1993
priority date (Note) -
In Force
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Abstract
A method and apparatus is disclosed, particularly, though by no means exclusively, useful in touch--screen computer CRT display systems and the like, and more generally in other force and/or torque measurement systems, as in weighing and the like, in which (1) lineal and/or rotational acceleration of the system is sensed in response to inertial interference effects such as tilt or movement that introduce errors into the force and/or torque measurements, and/or (2) inertial error correction from the force data itself is obtained, such as derivative order corrections; and such data is used to correct the force and/or torque measurements. A novel calibration technique for deriving appropriately descriptive coefficients to the particular system for the correcting data, is also disclosed.
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