| 摘要 |
PROBLEM TO BE SOLVED: To provide a measuring device and a measuring method capable of transmitting laser light and stokes light up to a desired measuring place and capable of measuring hydrogen gas concentration by CARS even under the influence of a laser-induced fluorescence of the surface vicinity of a piping, a piping joint, and a piping valve.SOLUTION: A hydrogen gas concentration measuring device includes: a control part 12 for calculating a hydrogen gas concentration in a measuring place based on the signal intensity of Raman scattered light; a main body part; a probe part 30 installed on the measuring place; and an optical transmission line 20 for optically connecting the probe part and the main body part 10. In the hydrogen gas concentration measuring device, the probe part is constituted of: an emitting port; a convex lens for narrowing down a beam diameter of laser light and emitting light from an emission port to the measuring place; and a positioning guide. The light transmission line includes a multi-joint optical transmission line for transmitting the laser light, the stokes light, and the anti-stokes light by a plurality of mirrors provided in joint parts between the main body part and the probe part.SELECTED DRAWING: Figure 1 |
