| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring device and a measuring method capable of measuring a flow rate or the like at a low cost.SOLUTION: The measuring device includes a processing part having a light source, a measuring part 12 to be floated on a fluid, and an optical fiber 14 disposed so as to reach the measuring part from the processing part. The measuring part has a displacement part 76 to be displaced according to the flow rate of the fluid, and the optical fiber is immersed in the fluid through the displacement part so that an immersion length in the fluid is changed according to the displacement of the displacement part. The processing part obtains the immersion length in the fluid of the optical fiber on the basis of a temperature distribution along a longitudinal direction of the optical fiber measured by introducing light from the light source to the optical fiber, and obtains the flow rate of the fluid on the basis of the obtained immersion length. |
