Question: Design a load cell to measure axial loads with maximum sensitivity up to 1 0 0 0 MN . The load cell should be insensitive
Design a load cell to measure axial loads with maximum sensitivity up to MN The load cell should be insensitive to bending and torsion loads.Step : Using the Wheatstone bridge equation, design the placement for the gauges. Hint: Use all four arms of the bridgeStep : Size the steel member assuming using the WAAE gauges with Ag mmNote: Ohm gauges are used because of their increased sensitivity Also note that the typical voltage output to excitation voltage is VoVs This represents a typical voltage that can be measured using electrical instruments measuring voltage before gain Use steel with a yield strength of MPa and modulus of elasticity of GPa and Poisson ratio of a Assume a circular crosssectionb Assume a square crosssectionStep : Check the strains in the gauges at the maximum load to make sure that fatigue is not going to be an issue For the strain gauge proposed, the strains have to be lower than microstrains to prevent fatigue damageStep : Determine the maximum excitation voltage to use based on the power dissipation of the gauges. Assume PtextWmmStep : If a load of MN is applied, what is the voltage that will be created in the Wheatstone bridge? Assume a Volt excitation is used on the bridge
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