Sometimes we need to measure very small forces. We can do this by measuring strain using...
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Sometimes we need to measure very small forces. We can do this by measuring strain using a strain gauge. A strain gauge operates on the principle of change in resistance with respect to change in length, and so by measuring the changes in resistance of a strain gauge Rx due to (as a function of) strain &, we can obtain a good indication of the strain of an object that the strain gauge is attached to: 12 V where Ro is the nominal (unstrained) resistance of the strain gauge (i.e., R (0)), and G is some constant. A strain gauge, Ry, is placed in a Wheatstone bridge circuit so that its output voltage can be used to (indirectly) monitor the strain of an object. The circuit has the following parameters: R₁ = 1200 R₁ = 820 Q = R₂ = R₂ G=5 R₂ = 560 Q R₁ R3 A milli-strain B VOUT R(E)-Ro Ro R3 = 330 Q In this configuration, as the resistance of the strain gauge decreases from its nominal value, the output voltage of the Wheatstone bridge would On a particular instant, the output voltage was measured to be VouT= 7.5 V. Determine the resistance of the strain gauge, and the strain of the object it is monitoring in milli-strain. Rx Ω E = G.E ◆ and this indicates that the object is undergoing + strain. Sometimes we need to measure very small forces. We can do this by measuring strain using a strain gauge. A strain gauge operates on the principle of change in resistance with respect to change in length, and so by measuring the changes in resistance of a strain gauge Rx due to (as a function of) strain &, we can obtain a good indication of the strain of an object that the strain gauge is attached to: 12 V where Ro is the nominal (unstrained) resistance of the strain gauge (i.e., R (0)), and G is some constant. A strain gauge, Ry, is placed in a Wheatstone bridge circuit so that its output voltage can be used to (indirectly) monitor the strain of an object. The circuit has the following parameters: R₁ = 1200 R₁ = 820 Q = R₂ = R₂ G=5 R₂ = 560 Q R₁ R3 A milli-strain B VOUT R(E)-Ro Ro R3 = 330 Q In this configuration, as the resistance of the strain gauge decreases from its nominal value, the output voltage of the Wheatstone bridge would On a particular instant, the output voltage was measured to be VouT= 7.5 V. Determine the resistance of the strain gauge, and the strain of the object it is monitoring in milli-strain. Rx Ω E = G.E ◆ and this indicates that the object is undergoing + strain.
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Related Book For
Income Tax Fundamentals 2013
ISBN: 9781285586618
31st Edition
Authors: Gerald E. Whittenburg, Martha Altus Buller, Steven L Gill
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