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  1. JoacimR

    Precision and uncertainty of video-extensometer

    Thank you for your input on this. I will compare the extensometer to a LVDT to make sure I get this right.
  2. JoacimR

    Precision and uncertainty of video-extensometer

    Thank you for your quick replies! btrueblood, I agree with you on this. But how do I compensate for the error given by the angle from the line of sight? See the attached picture. As the material is stretched the beta angle increases and the end of L2 approaches the boundary of the FOV. Then the...
  3. JoacimR

    Precision and uncertainty of video-extensometer

    Hi all This is my first post after a few years absence from Eng-Tips. Hopefully I'm posting in the correct forum... I'm new to extensometer measurements so I wanted to find out more about the measurement uncertainty of my video-extensometer. Performing the uncertainty calculations described in...
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