Ultrasonic velocity profiler for very low velocity field

作者：Ihara Tomonori^*; Kikura Hiroshige; Takeda Yasushi

来源：Flow Measurement and Instrumentation, 2013, 34: 127-133.

DOI：10.1016/j.flowmeasinst.2013.10.003

• Ultrasonic velocity profile method
• Very slow flow
• Phase difference method
• Measurement accuracy
• Feasibility test

An ultrasonic velocity profile measurement system has been realized that can measure velocities in a very slow flow. The system implements a novel phase difference method that overcomes the low velocity limitation in a conventional signal processing algorithm for the Doppler method. The measurement system consists of pulser/receiver, transducer and digitizer only with all signal processing carried out on a personal computer. The measurement limitation at a very low velocity was examined using signals reflected from a wall which are collected by moving transducer at speeds less than 10(-2) mm/s. For velocity profiling, real-time profile measurements were performed, which demonstrated successful results for the flow inside a rotating cylinder.

• 出版日期2013-12