Calculadora de Puente de Galga Extensométrica

Calcula el voltaje de salida del puente de galgas extensométricas según el factor de galga y la deformación.

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Fórmula

V_{out} = V_{in} \cdot \frac{GF \cdot \varepsilon}{4} \cdot N

V_out — Bridge output voltage (V)

V_in — Excitation voltage (V)

GF — Gauge factor

ε — Applied strain (m/m) (m/m)

N — Number of active arms (1, 2, or 4)

Cómo Funciona

A strain gauge bridge circuit is a sophisticated transducer configuration used to convert mechanical strain into an electrical signal. The circuit typically uses a Wheatstone bridge arrangement where resistive strain gauges experience dimensional changes proportional to applied mechanical stress. By measuring the voltage differential across the bridge, precise strain measurements can be obtained.

Ejemplo Resuelto

Problem: Calculate the output voltage for a full Wheatstone bridge strain gauge with 2V excitation, gauge factor of 2.1, and a strain of 0.001 m/m Solution: 1. Gauge Factor (GF) = 2.1 2. Excitation Voltage (Vin) = 2V 3. Strain (ε) = 0.001 m/m 4. Number of Active Arms (N) = 4 5. Vout = 2V * (2.1 * 0.001 / 4) * 4 = 0.00210V or 2.10mV

Consejos Prácticos

✓Calibrate strain gauge bridges before critical measurements
✓Use temperature-stable resistors in the bridge network
✓Select appropriate gauge factor based on material properties

Errores Comunes

✗Neglecting temperature compensation in strain measurements
✗Using incorrect gauge factor for the specific material
✗Not accounting for bridge configuration sensitivity

Preguntas Frecuentes

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