NSTH Transducer : International Publication Number WO 2020/193804 A1.

NSHT Transducer for the detection of strains and/or temperature variations in engineering works and/or terrestrial zones, the transducer comprising at least one distributed optical fiber sensor based on Brillouin scattering and characterized by the fact that, for at least a part of its longitudinal extension, said optical fiber is housed inside a containment structure which is destined to be associated with the engineering work and/or terrestrial zone of which, and along which, to detect the strains and/or temperature variations, wherein both ends of the optical fiber are located outside the containment structure, said containment structure comprising:10 - an intermediate layer wherein said longitudinal part of optical fiber is completely contained; - a pair of coating layers which cover above and below said intermediate layer, the mechanical stiffness characteristics of the coating layers and of the optical fiber being substantially the same.