Extensiométricas

Extensiométricas, often referred to as strain gauges, are sensing devices used to measure strain, which is the deformation of a material under stress. They work on the principle that the electrical resistance of a conductor changes when it is stretched or compressed. A typical extensiómetrica consists of a thin foil pattern, often made of a metal alloy like constantan, bonded to a carrier material, usually a polymer film. This pattern is arranged in a serpentine or meander shape to maximize its length and thus its sensitivity to strain. When the object to which the extensiómetrica is attached deforms, the foil pattern stretches or compresses along with it. This change in dimension alters the electrical resistance of the foil. By measuring this change in resistance, the amount of strain can be accurately determined. Extensiométricas are widely used in various applications, including stress analysis in engineering structures, load cells for weighing systems, pressure sensors, and in the development of sophisticated measurement systems for research and industry. They are typically connected in a Wheatstone bridge configuration to amplify the small resistance changes and provide a more precise output signal, often expressed as a voltage proportional to the strain.