Weighing scales – Processes
Patent
1997-07-16
1999-06-08
Gibson, Randy W.
Weighing scales
Processes
73 113, 73 115, 702101, 177 50, G01G 1314
Patent
active
059106450
ABSTRACT:
A measuring pick-up or load cell shall be made less sensitive against off-center load applications, if necessary. At least it must be made certain that the off-center load sensitivity is within a permissible tolerance range. For this purpose the sensor body (1A, 1', SB) of the detector (1) to which there is applied at least one pick-up element or strain gage (5), is held for each load application in a different fixed position in a mounting (2) in such a way that, spaced from the clamping position a test load can be applied in a direction deviating from the direction and/or position of the axis of symmetry (CA, AS) of the sensor body (1A, 1', SB). The test loads may be uniform or they may differ for one or more load application points. A respective output signal is measured and correlated to the applied test load. At least one additional test load of the same size is applied in a different load application direction, and the respective output signal is again measured and correlated to the second test load. Then, the output signals are evaluated with reference to a tolerance range (TR) stored in a memory of a control unit (11) to determine whether a tuning of the sensor body is necessary to make the pick-up less sensitive. If such tuning is necessary, at least one tuning is performed. The tuning may be a mechanical material removal from the sensor body and/or as an electrical tuning by resistor adjustments.
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Gerlach Hans-Joachim
Schlachter Werner
Waegner Ralf
Will Heinz Ronald
Fasse W. F.
Fasse W. G.
Gibson Randy W.
Hottinger Baldwin Messtechnik GmbH
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