1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Wheatstone bridge/ strain gauge question

  1. Apr 21, 2008 #1
    Need to do an experiment where I masure the strain of wood due to changes in temperature. I believe I need to use 2 strain gauges, one to measure the strain and the other to act as a dummy to cancel out any affects that heating will have on the strain gauge. I also know that a wheatstone bridge needs to be used to find out the very small changes in resistance. What I don't know is how to link all that together to get some results of strain.

    Does anyone know how I can put my strain gauges into the wheat stone bridge equation to come up with a value of strain? I think it will look something like this:

    4(Vout/vexternal)/Gauge factor = strain


    Is it right?

    Many thanks!
     
  2. jcsd
  3. Apr 22, 2008 #2
    nobody can help me, it's really important I get this equation right?
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?