Method and apparatus for making load measuring pick-ups less sen

Details Method and apparatus for making load measuring pick-ups less sen Method and apparatus for making load measuring pick-ups less sen

1995-05-03

1997-10-21

Gellner, Michael L.

Measuring and testing

Instrument proving or calibrating

Volume of flow, speed of flow, volume rate of flow, or mass...

177 1, 177 50, G01G 1314

Patent

active

056798822

ABSTRACT:
A measuring pick-up or detector 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). 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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H. Leinonen, Experiments And Analysis Of Force Transmission In Force Transducers To Improve Their Characteristics, Measurement, vol. 6, No. 2, Apr.-Jun. 1988, pp. 81 to 86.
S.N. Pogodin, Automated Calculating System For Investigation Of Elastic Characteristics Of Strain-Gauge Dynamometers, Measurement Techniques, Apr. 1992, pp. 408 to 411.

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