Temperature abnormality detecting structure for fluid pipe

A temperature abnormality detecting structure for a fluid pipe for detecting a temperature abnormality location by laying, along the fluid pipe, an optical fiber serving as a temperature detecting portion of a Raman scattering optical fiber distribution type temperature sensor, wherein:

• said fluid pipe is divided into a plurality of sections in a longitudinal direction of said fluid pipe, with adjacent ones of said sections meeting each other at a boundary;
• said optical fiber is looped, substantially in a shape of rectangle, at least at one portion thereof in the longitudinal direction to form at least one superposed portion of the optical fiber in the vicinity of the boundary of adjacent ones of said sections, to detect temperature data of the boundary of the adjacent sections,;
• and
• data processing means for processing the detected temperature data to determine whether or not a temperature abnormality occurs at the boundary of the adjacent sections.

A temperature abnormality detecting structure for a fluid pipe, for detecting a temperature abnormality location by laying, along the fluid pipe, an optical fiber serving as a temperature detecting portion of a Raman scattering optical fiber distribution type temperature sensor along a fluid pipe, wherein:

• said fluid pipe is divided into a plurality of sections in a longitudinal direction of said fluid pipe, with adjacent ones of said sections meeting each other at a boundary;
• said optical fiber is looped, substantially in a shape of an "l", in the longitudinal direction of the optical fiber at least at one portion thereof to form at least one "l"-shaped portion in the longitudinal direction of the optical fiber in the vicinity of a boundary of adjacent ones of said sections of said fluid pipe, to detect temperature data of the boundary of the adjacent sections;
• and
• data processing means for processing the detected temperature data to determine whether or not a temperature abnormality occurs at the boundary of the adjacent sections.

A temperature abnormality detecting structure for a fluid pipe, for detecting a temperature abnormality location by laying, along the fluid pipe, an optical fiber serving as a temperature detecting portion of a Raman scattering optical fiber distribution temperature sensor, wherein:

• said fluid pipe is divided into a plurality of adjacent sections in the longitudinal direction, adjacent ones of said sections meeting each other at a boundary;
• said optical fiber is laid along the fluid pipe and is folded back in multiple, with corners thereof forming substantially right angles, at least at one portion thereof in the longitudinal direction, to form a multi-superposed portion of the optical fibers, in the vicinity of a boundary of adjacent ones of said sections, to detect temperature data of the boundary of the adjacent sections;
• and
• data processing means for processing the detected temperature data to determine whether a temperature abnormality occurs or not at the boundary of the adjacent sections.