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mediciones dif wheatstone

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Ecuaciones para medición diferencial con el Puente de Wheatstone V a' = R x + ΔR x R 1 + R x + ΔR x E V b' = R var R 2 + R var E = R x R 1 + R x E V s = V a' − V b' = R x + ΔR x R 1 + R x + ΔR x E − R x R 1 + R x E = ΔR x R 1 ( R 1 + R x )( R 1 + R x + ΔR x ) E En esta ecuación aplicamos la aproximación V s = ΔR x R 1 ( R 1 + R x ) 2 E Por lo tanto ΔR x = ( R 1 + R x ) 2 R 1 E V s R 1 + R x + ΔR x = R 1 + R x

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Mediciones Dif Wheatstone

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  • Ecuaciones para medicin diferencial con el Puente de Wheatstone

    Va' =Rx +Rx

    R1 + Rx +RxE

    Vb' =Rvar

    R2 + RvarE = RxR1 + Rx

    E

    Vs =Va' Vb' =Rx +Rx

    R1 + Rx +RxE RxR1 + Rx

    E = RxR1(R1 + Rx )(R1 + Rx +Rx )E

    En esta ecuacin aplicamos la aproximacin

    Vs =RxR1

    (R1 + Rx )2E Por lo tanto

    Rx =(R1 + Rx )2

    R1EVs

    R1 +Rx +Rx = R1 +Rx


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