| 摘要 |
[Problem] To provide a temperature measuring system and abnormality detecting method capable of detecting, at an early stage, abnormalities occurring at facilities such as chemical plants, oil refineries, and fossil-fuel power plants. [Solution] A temperature measuring system has an optical fiber (30), a temperature distribution measuring device (31), and a data processing device (32). The temperature distribution measuring device (31) detects backscattered light by inputting light to the optical fiber (30), and acquires the temperature distribution along the lengthwise direction of the optical fiber (30) from those detection results. The data processing device (32) stores the temperature distribution acquired with the temperature distribution measuring device (31), and, by calculating the differential of the current temperature distribution and a past temperature distribution and performing signal processing with respect to the acquired differential temperature distribution, determines the presence of abnormalities from those results. |
