Wheatstone bridge simulation in PSPICE

Discussion in 'General Electronics Chat' started by Jebasingh, Mar 2, 2011.

  1. Jebasingh

    Thread Starter New Member

    Mar 1, 2011
    16
    0
    Hi all,

    I need to simulate the strain gage connected in the wheatstone bridge, kindly helpme out how to carry the simulation in Pspice.

    Regards
    Jeba
     
  2. nickagian

    Active Member

    Mar 12, 2010
    34
    0
    Hi Jeba,

    what exactly do you want to simulate? I think there is no way to automatically simulate directly the effect of an applied strain to the output of the bridge. All you can do is put a fixed resistor in the place of the gage and either as a parameter or manually you can change its value and see the output of the bridge. In order to know what value to put the resistor, you have to know the relationship between the strain and the gage's resistance. And for this, all you have to know is the gage factor (GF) of the gage. Then

    ΔR/R0 = GF x ε

    and from this relationship you find the resistance of the gage at given strain values.

    Nikos
     
  3. Ron H

    AAC Fanatic!

    Apr 14, 2005
    7,050
    656
    I agree. Fortunately, you can make ε your independent variable if you parameterize ΔR.
     
  4. Jasonlim

    New Member

    Mar 3, 2011
    1
    0
    just as Nickagian said, you look for a resistor in place of the gage. Get the resistance from the bridge formula. You need also to find the relationship between the determined resistance and your gage parameters.
     
  5. Jebasingh

    Thread Starter New Member

    Mar 1, 2011
    16
    0
    Hi Nikos Thanks for your reply

    I need to keep the four resistances in wheatstone bridge network and to do parameter sweep for all the four resistances at the same time i.e i need to change all the four resistances and to get the bridge output.

    Is it possible?

    Regards
    Jebasingh
     
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