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Análise Experimental<br />

Shunt Calibration of Strain Gage Instrumentation<br />

U <br />

V<br />

0<br />

V EX<br />

(com shunt)<br />

U<br />

<br />

<br />

<br />

<br />

R<br />

4<br />

R4<br />

R<br />

eq<br />

<br />

R<br />

1<br />

R1<br />

R<br />

2<br />

<br />

<br />

<br />

<br />

R1<br />

R2<br />

R3<br />

R4<br />

<br />

R G<br />

U<br />

<br />

R<br />

G<br />

<br />

RG<br />

R<br />

R<br />

S<br />

RG<br />

R<br />

S<br />

G<br />

<br />

1<br />

2<br />

<br />

R<br />

S<br />

2R<br />

S<br />

<br />

<br />

R<br />

G<br />

R<br />

G<br />

<br />

1<br />

2<br />

U<br />

<br />

RG<br />

4R<br />

2R<br />

S<br />

G<br />

U é a relação entre a tensão do sinal esperado e a tensão de excitação ao<br />

se utilizar o circuito com o resistor de calibração engatado (“shunt”) no R3.

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