Calculadora de Puente de Wheatstone

Calcula el voltaje de salida y el balance del puente de Wheatstone para sensores de presión, fuerza y strain.

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Fórmula

V_{out} = V_{in} \left(\frac{R_3}{R_1+R_3} - \frac{R_4}{R_2+R_4}\right)

V_out — Differential output voltage (V)

V_in — Bridge supply voltage (V)

R1–R4 — Bridge arm resistances (Ω)

Cómo Funciona

A Wheatstone bridge is a precision electrical circuit used for measuring unknown electrical resistances by comparing them to known reference resistances. The circuit consists of four resistors arranged in a diamond-like configuration, with a voltage source across two diagonal points and a sensitive voltmeter measuring the voltage difference across the other two points. When the bridge is balanced, the output voltage becomes zero, allowing precise resistance measurements.

Ejemplo Resuelto

Problem: Calculate the output voltage for a Wheatstone bridge with Vin = 5V, R1 = 100Ω, R2 = 120Ω, R3 = 110Ω, R4 = 130Ω Solution: 1. Apply Vout = Vin·(R3/(R1+R3) - R4/(R2+R4)) 2. Vout = 5 · (110/(100+110) - 130/(120+130)) 3. Vout = 5 · (0.524 - 0.521) 4. Vout = 5 · 0.003 5. Vout = 0.015V or 15mV

Consejos Prácticos

✓Calibrate the bridge regularly for accurate measurements
✓Use high-precision resistors for sensitive measurements
✓Minimize external electrical noise in the measurement setup

Errores Comunes

✗Misinterpreting bridge balance conditions
✗Ignoring temperature effects on resistances
✗Using inappropriate precision measurement equipment

Preguntas Frecuentes

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