METHOD FOR MEASURING STRESS IN A WORKING STRUCTURE OR IN A COMPONENT PART OF A WORKING STRUCTURE

摘要

A method for measuring stress in a working structure or in a component part of a working structure, wherein at least one stress sensor (3) is formed from a respective element of piezospectroscopically active material with a given piezospectroscopic coefficient (p), and by designing the element as a function of the physical characteristics and working conditions of the structure (2); the sensor (3) is made integral with the structure (2) so that the stress in the structure (2) is transmitted to the sensor (3); a first electromagnetic emission spectrum of the sensor (3) is acquired before the structure (2) is put into service, and a second electromagnetic emission spectrum of the sensor (3) is acquired after the structure (2) is put into service; the second electromagnetic emission spectrum is compared with the first electromagnetic emission spectrum to determine a spectrum shift (?v), which is processed with the piezospectroscopic coefficient (p) to obtain a stress measurement.