| 摘要 |
PROBLEM TO BE SOLVED: To provide a fluid identification technique which allows for receiving ultrasonic pulses that traverse a fluid in a tubular member with a good S/N ratio.SOLUTION: A fluid identification device comprises: a transmitter probe 2 which is placed on an outer peripheral surface 11 of a tubular member 1 containing a fluid therein to transmit an ultrasonic pulse in a traverse direction of the tubular member; a receiver probe 3 which is placed on the outer peripheral surface 11 to receive an in-fluid propagating ultrasonic pulse which is an ultrasonic pulse that traverses the fluid; a signal evaluation unit which determines a type of the fluid based on propagation time of the in-fluid propagating ultrasonic pulse that has traveled across the fluid; and an ultrasonic absorption member 4 which is mounted on the outer surface of the tubular member 1 between the transmitter probe 2 and the receiver probe 3 to absorb a wall body-propagating ultrasonic pulse which is an ultrasonic pulse that propagates along the peripheral wall of the tubular member 1. |
