WATER TEMPERATURE MEASUREMENT APPARATUS AND WATER TEMPERATURE MEASUREMENT METHOD

摘要

PROBLEM TO BE SOLVED: To provide a water temperature measurement apparatus capable of properly measuring water temperature free from influences by the configuration of the landscape at a measurement point.SOLUTION: The water temperature measurement apparatus includes: a laser distance measurement section 100 that receives a first reflectance 40 and a second reflectance 50 of a first pulse laser beam 20 and a second pulse laser beam 30 each having a different wavelength, which are emitted into the water and reflected at a measurement point, and calculates distance values Dand Deach representing an optical path length of the received first reflectance 40 and second reflectance 50 each having different wavelength; and a temperature calculation section 200 that calculates a water temperature on the optical path of the laser beam on the basis of the ratio between the distance values Dand Dcalculated by the laser distance measurement section 100.SELECTED DRAWING: Figure 1