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PROCEDURE AND APPARATUS FOR MEASURING THE DEFORMATION IN A TRACTION TEST.
ES2324696
The present invention relates to a method for measuring deformation in a tensile test, as well as to the device by means of which said method is developed. The method consists in the measurement of the deformation from the displacement of two points by means of laser sensors placed parallel to the axis of the specimen. These are mounted on an articulated support that is attached to the test machine. The device is completed with two stops that placed on the specimen serve as a target for the sensors. The device allows: making measurements without contact with the specimen, to prevent possible damage in the breakage thereof; automatic calculation of the extensometer measuring base, without initial measurements; measure directly, without previous calibration and has the possibility to measure very accurately in short distances or large elongations with less precision. (Machine-translation by Google Translate, not legally binding)
La presente invención se refiere a un procedimiento para medir la deformación en un ensayo de tracción, así como al dispositivo mediante el que se desarrolla dicho procedimiento. El método consiste en la medición de la deformación a partir del desplazamiento de dos puntos por medio de sensores láser colocados paralelamente al eje de la probeta. Éstos van montados sobre un soporte articulado que se amarra a la máquina de ensayo. El dispositivo se completa con dos topes que colocados sobre la probeta sirven de diana para los sensores. El dispositivo permite: realizar medidas sin contacto con la probeta, para prevenir posibles daños en la rotura de la misma; calcular automático de la base de medida del extensómetro, sin medidas iniciales; medir de forma directa, sin calibración previa y tiene la posibilidad de medir con mucha precisión en recorridos cortos o grandes elongaciones con menor precisión.