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Load Cell Design Using COMSOL Multiphysics

A. Marchidan1 T. Sullivan1 J. Palladino1
1Trinity College, Hartford, CT, USA

Location of transducer spring element high strain regions T1, C1, T2., and C2.

COMSOL Multiphysics was used to design a binocular load cell. A three-dimensional linear solid model of the load cell spring element was studied to quantify the high-strain regions under loading conditions. The load cell was fabricated from 6061 aluminum, and general purpose Constantin alloy strain gages were installed at the four high-strain regions of the spring element. The four gages were wired as a full Wheatstone bridge configuration and total strain was measured for applied loads ranging from 0-2.5 kg in 100 g increments. Model total strain was measured using point probes at each of the four strain locations, and with a load parametric analysis. Absolute mean model-predicted strain was 1.41% of measured strain. The load cell was highly linear.

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