This paper outlines the use of inverse analysis in strain distribution recovery. To carry it out we used a sensor with FBG (fibre Bragg grating) and the inverse problem solution was discussed. The study and validation of a mathematical model with the fibre Bragg grating is also outlined in this paper. Computer simulations were carried out using numerical algorithms which performed calculations according to the mathematical structure of the model and respected all remaining values of the FBG sensor elements. Experimental measurements were also conducted using a built measurement system.