Evolución del Sistema de Adquisición de Datos Aplicado a la Determinación de Propiedades Resistentes en Madera Estructural

Abstract

One of the drawbacks in the experimental determination of mechanical and elastic properties of structural elements is the simultaneous measurement of loads and deformations at various points. Usually used instruments are load cells and comparators, which have a digital display and electronic data output. The bending test allows the determination of the local and global modulus of elasticity, transverse elastic modulus and modulus of rupture. For this procedure, the deformation of the test piece is measured at seven points simultaneously. Reading by direct observation generates uncertainties. To optimize the data acquisition and its fidelity, two methods are proposed. One performs direct observation using webcams and image capture software. The other extracts the electronic signal from each device and stores the reading in a digital file. This paper presents the experience of the GIDEC group in the implementation of these procedures.