Fluid identification device and fluid identification method

摘要

PROBLEM TO BE SOLVED: To provide a fluid identification device which can accurately identify a type of fluid existing inside a tubular member with a simple and easy configuration, and a fluid identification method.SOLUTION: A fluid identification device comprises: a transmission side oblique angle mounting member 4 which mounts a transmission probe 2 to a surface 1a of a tubular member 1 in a state in which an ultrasonic wave is made obliquely incident to the surface 1a; a reception side oblique angle mounting member 5 which mounts a reception probe 3 to the surface 1a in a state in which the ultrasonic wave from the transmission probe 2 is obliquely received from the surface 1a; an integration member 6 which can freely integrate the mounting members 4, 5 in a state in which the mounting members 4, 5 are positioned at the positions facing each other in a direction along a shaft core X of the tubular member 1; an attenuation member 7 which covers the surface 1a; a sound speed calculation part 23 which calculates the propagation speed of the ultrasonic wave inside the tubular member 1 on the basis of the time difference from transmission of the ultrasonic wave by the transmission probe 2 to reception of the transmitted and propagated wave of the ultrasonic wave by the reception probe 3; and a fluid type identification part 24 which identifies the type of fluid existing inside the tubular member 1 on the basis of the propagation speed.