Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Regarding a bimorph's structure

  1. Jun 14, 2015 #1
    Can anyone explain to me why a bimorph has a metal in between the two piezo-layers?
     
  2. jcsd
  3. Jun 14, 2015 #2

    Baluncore

    User Avatar
    Science Advisor

    Maybe it provides the common electrical connection to the far end of the bimorph cantilever.
     
  4. Jun 14, 2015 #3
    Are you sure? I've tried searching for it many places but I just can't find anything about it.
     
  5. Jun 14, 2015 #4

    Baluncore

    User Avatar
    Science Advisor

    No, I'm not sure which is why I say maybe.
    It is an educated guess in that to control the two piezo elements independently will require a minimum of three electrical connections.
    One of those terminals will be common to both piezo elements and so must reach to the far end of the device.
    The metal will be repeatably stretched and contracted as the structure walks. Being on the neutral axis will minimise the metal length change.
     
  6. Jun 14, 2015 #5

    Baluncore

    User Avatar
    Science Advisor

    See; www.piezo.com/tech2intropiezotrans.html
    There are also fabrication and structural advantages.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook