FBG temperature sensor

摘要

PROBLEM TO BE SOLVED: To provide an FBG temperature sensor that can further accurately measure a temperature of a narrow area where detection has been conventionally difficult.SOLUTION: A main body part 3 has a through-hole 31 into which an optical fiber 2 is inserted. Further, the main body part 3 cantilever-supports the optical fiber 2 inserted into the through-hole 31 on one side of an FBG part 21. A heat reception part 4 contacts with a temperature detection object. A thermal conductivity part 5 is arranged at a space with the optical fiber 2 in a state of surrounding a periphery of the FBG part 21. Further, the thermal conductivity part 5 is thermally connected to the heat reception part 4. A coupling part 35 is provided in the main body part 3. The coupling part 35 supports an outer peripheral surface of the heat reception part 4 or an outer peripheral surface of the thermal conductivity part 5, and thereby fixes the heat reception part 4 to the main body part 3. In the foregoing configuration, the coupling part 35 is composed of a material lower in a thermal conductivity than the heat reception part 4 and the thermal conductivity part 5.SELECTED DRAWING: Figure 2