A strain gauge is a sensor that measures strain on an object by converting mechanical deformation into electrical resistance changes.
A strain gauge is a precision sensor used to measure strain (deformation) on the surface of an object. It consists of a thin metallic foil pattern bonded to a flexible backing material. When the object deforms under load, the gauge experiences corresponding strain, causing its electrical resistance to change proportionally. This change is measured using a Wheatstone bridge circuit, allowing precise quantification of stress, force, pressure, or torque in industrial applications.
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In a load cell, strain gauges are bonded to a deformable element (like a beam or diaphragm). When force is applied, the element deforms, causing strain gauges to change resistance. This is measured via a Wheatstone bridge to calculate the applied force.
Common applications include load cells for weighing systems, pressure transducers, torque sensors, structural health monitoring, and material testing in manufacturing, aerospace, and automotive industries.
Calibration involves applying known forces or strains to the gauge and measuring output signals. It requires controlled environments, reference standards, and often follows ISO 376 or similar protocols for load cells.
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