Arrangement for detecting expansions, temperatures and their variations of coating applied to bearer has optical fiber on bearer surface with Bragg grid used as sensor in defined fiber section

摘要

The arrangement has at least one optical sensor positioned on the bearer (1) in the form of at least one optical fiber (2) on the bearer surface, with a Bragg grid used as a sensor in a defined section of the fiber. The fiber becomes doubly refracting through non circular-symmetrical thermomechanical stresses or strains transferred to it by the coating (3) and a force-locking connection exists between the coating, fiber and bearer surface. Independent claims are also included for the following: a method of implementing arrangement.