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Unformatted text preview: ero strain is RGo . R RG R Vs
RG - Vo
RG F a. Derive the sensitivity Vo of the strain measurement in terms of Vs , R, RG , G .
Assume gauge factor, G, for both strain gauges. Hint: You can make a
simplification with the small strain case.
o b. Assuming that R = RGo , what does the sensitivity expression simplify to? What is
the effect of a temperature increase on the sensitivity?
c. You now want to find a proper strain gauge to use for this test. You expect your
strain at these locations to be ~5%. What should your gauge factor be in order to
achieve a 1V output with a 10V source, using the expression y...
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- Winter '08