Data processing: measuring – calibrating – or testing – Calibration or correction system – Weight
Reexamination Certificate
2006-06-21
2010-06-15
Gibson, Randy W (Department: 2841)
Data processing: measuring, calibrating, or testing
Calibration or correction system
Weight
C177S185000, C708S300000
Reexamination Certificate
active
07739068
ABSTRACT:
A method serves to process output signal of a measuring transducer in a force-measuring device, in particular in a balance, wherein the measuring transducer produces a measuring signal representative of a load acting on the device and the measuring signal is filtered in a variable analog filter and/or, after processing in an analog/digital converter, the measuring signal is filtered in a variable digital filter, in order to remove unwanted signal components that are caused by disturbances affecting the force-measuring device, in particular by changes in the weighing load. The measuring signal is monitored in regard to the occurrence of a change in the weighing load and after a load change has been detected, at least one filter parameter of the filter is reset and then varied as a function of time in accordance with a prescribed time profile fc(t), so that the filter is opened after a load change has been detected and then closed again to the point where a predefined filter characteristic has been attained which is determined by the end value of the at least one filter parameter. By using this method, it is possible with simple measures to realize noticeably shortened transient settling times of the force-measuring device after a load change has occurred.
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Buchanan & Ingersoll & Rooney PC
Gibson Randy W
Mettler-Toledo AG
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