Strain gauges: bridge circuits, transducers and rosettes
Gauge factor, Wheatstone quarter, half and full bridges, calibration, lead-wire and temperature effects, force, bending, torque and pressure transducers, and rosette evaluation after Keil.
Define the task and bridge circuit, link signal and strain, estimate error sources, then convert strains into stresses.
Calculators in this category
Strain Gauge Resistance Change Calculator
Calculate the relative and absolute resistance change of a strain gauge from nominal resistance, gauge factor and strain, plus the quarter-bridge signal.
Open calculator →Strain Gauge Transverse Sensitivity Calculator
Correct the indicated strains of two perpendicular strain gauges for transverse sensitivity q and see the error without correction.
Open calculator →Strain Gauge Apparent Strain Calculator
Calculate thermal resistance change and apparent strain of a strain gauge from grid temperature coefficient, thermal expansion of part and grid, and gauge factor.
Open calculator →Strain Gauge Excitation Voltage Calculator
Calculate power loss, current and power density per strain gauge and the maximum bridge excitation voltage for a guideline power density.
Open calculator →Wheatstone Bridge Output Voltage Calculator
Calculate the exact output voltage and ratio U_M/U_B of an unbalanced Wheatstone bridge from the four arm resistances and the excitation.
Open calculator →Strain Gauge Bridge Equation Calculator
Calculate the bridge output signal from the strains in all four arms and the gauge factor – linearised and with the exact equation 4.6.
Open calculator →Quarter, Half and Full Bridge Factor Calculator
Calculate the bridge factor B and output signal for Keil's nine elementary strain-gauge bridge circuits from strain, gauge factor and Poisson's ratio.
Open calculator →Bridge Signal to Strain Calculator (mV/V)
Convert a measured bridge signal in mV/V into strain and uniaxial stress, with correction of the quarter-bridge non-linearity per eq. 4.7.
Open calculator →Shunt Calibration Resistor Calculator
Calculate the shunt resistor R_N for a desired strain-gauge calibration signal, exactly and per approximation eq. 8.7, and the strain it simulates.
Open calculator →Strain Gauge Lead Wire Resistance Calculator
Calculate cable resistance and its effect on sensitivity and zero for full, half and quarter bridges in two- and three-wire connection.
Open calculator →Load Cell Parallel Trim Resistor Calculator
Calculate the trim resistors in the output leads of up to four parallel full-bridge load cells so each contributes equally to the summed signal.
Open calculator →Axial Force Transducer Calculator
Calculate strain, stress and bridge output of an axially loaded strain-gauge force transducer, including sensitivity in mV/V at rated force.
Open calculator →Bending Beam Strain Gauge Calculator
Calculate bending stress, strain at the gauge, deflection at the load point and bridge signal of a cantilevered rectangular beam with strain gauges.
Open calculator →Torque Transducer Calculator for Shafts
Calculate shear stress, ±45° principal strains and the full-bridge signal of a solid or hollow shaft torque transducer from torque, diameters and material data.
Open calculator →Shear Force Transducer Calculator (45° Gauges)
Calculate mean shear stress in the neutral fibre, 45° strains and the half- or full-bridge signal from shear force and web area.
Open calculator →Diaphragm Pressure Transducer Calculator
Calculate stresses, strains, centre deflection with linearity limit and the full-bridge signal of an edge-clamped circular diaphragm under pressure.
Open calculator →0°/45°/90° Strain Rosette Calculator
Calculate principal strains ε₁ and ε₂, maximum shear strain and the principal direction from the three strains of a rectangular 0°/45°/90° rosette.
Open calculator →0°/60°/120° Delta Rosette Calculator
Calculate principal strains and the principal direction from the three strains of a 0°/60°/120° delta rosette using the strain circle.
Open calculator →Principal Stress from Principal Strain Calculator
Calculate principal stresses, third principal strain, maximum shear stress and von Mises stress from two principal strains at a free surface.
Open calculator →Axial and Bending Strain Separation Calculator
Calculate axial strain, bending strains in two planes, bending-plane orientation and stresses from four gauges at 0°, 90°, 180° and 270° around a bar.
Open calculator →Thermal Stress Calculator for Restrained Expansion
Calculate free thermal strain, prevented strain, degree of restraint and thermal stress from the measured strain, temperature change and expansion coefficient.
Open calculator →Shaft Torque from Strain Calculator
Calculate shear stress and shaft torque from the strain measured with 45° gauges or directly from the bridge signal in mV/V.
Open calculator →Axial Force from Strain Calculator
Calculate axial stress and the tensile or compressive force on a rod from measured strain or the bridge signal in mV/V, plus the measuring-point sensitivity.
Open calculator →Bending Moment from Strain Calculator
Calculate bending stress, bending moment at the gauge and the causing force via the lever arm from measured beam strain or the bridge signal.
Open calculator →Shear Force from 45° Strain Calculator
Calculate shear stress and shear force in the web of a shear beam or I-section from strain measured at 45° or from the bridge signal.
Open calculator →Shaft Multi-Component Strain Calculator
Calculate axial force, bending moment and torque of a solid or hollow shaft from three strain-gauge full bridges, plus maximum normal and equivalent stress.
Open calculator →Crosstalk Correction Calculator (Multi-Component)
Calculate the true forces F_x, F_y and F_z of a multi-component measuring element from three channels and the crosstalk coefficients from calibration.
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