SYSTEM FOR MEASURING AND MONITORING THE STRAIN ON OBJECTS STRESSED BY EXTERNAL FORCES

摘要

The present invention relates to a system for measuring and monitoring strains of a two- or tri-dimensional object, comprising at least one group of optical sensors to be applied on said object according to a predetermined geometric configuration, said at least one group comprising a number of sensors at least equal to the number of dimensions of said object, each of said optical sensors being provided within at least one fiber optic cable, an optical interrogator machine (M) for generating a light signal at a given frequency to be sent in said at least one fiber optic cable, and for receiving response signals from said optical sensors and for determining the wavelength's displacement of said optical sensors from their nominal value or calibration value determined at the time of fixing the fiber optic cable on the object itself when it is in rest condition, i.e. when said object is not subjected to any to any external force; and a computer (C) for calculating the object's strain with respect to at least one of two or three reference axes X, Y and Z; said computer (C) being connectable to said interrogator machine (M) and receiving data concerning the displacement's wavelength of each of said optical sensors with respect to their calibration values.