| 摘要 |
PROBLEM TO BE SOLVED: To provide a flow velocity distribution measurement method and device, calculating a sound velocity value in conformity with a measurement environment even in a simple structure and precisely measuring the flow velocity distribution. SOLUTION: The flow velocity distribution measurement method is for measuring the flow velocity distribution of a fluid (fluid 104) by using an ultrasonic wave 260. In the method, a reflective member 270 reflecting the ultrasonic wave is installed in an emission direction of a side lobe 260b of the ultrasonic wave in the fluid to emit the ultrasonic wave in the fluid, and to receive the reflected wave 262b generated by the reflection of the side lobe of the emitted ultrasonic wave by the reflective member; and the sound velocity value of the fluid is calculated by using a distance from an emission position of the ultrasonic wave to the reflective member; and the time until the reflected wave is received after the ultrasonic wave is emitted, so that the flow velocity distribution of the fluid is found by using the sound velocity value and a reflected wave 262a generated by the reflection of the main lobe of the ultrasonic wave by a reflector (bubble 106) in the fluid. COPYRIGHT: (C)2011,JPO&INPIT |
