Practical Realization of Multi-point Measurement Method of Temperature and Velocity by FPGA

2019 Fiscal Year Final Research Report

• Project/Area Number: 16K14164
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Fluid engineering
• Research Institution: Numazu National College of Technology
• Principal Investigator: OHBA KATSUHISA 沼津工業高等専門学校, 電子制御工学科, 教授 (40321442)
• Project Period (FY): 2016-04-01 – 2020-03-31
• Keywords: 流体工学 / 熱流体計測 / 熱線流速計 / 抵抗線温度計 / FPGAデバイス

Outline of Final Research Achievements

In a wind tunnel experiments on thermally stratified flow, the measurement of velocity and temperature fields is the fundamental method. At that time, the thermo-anemometer that combines the hot-wire anemometer and the cold-wire thermometer is used. In this study, the thermo-anemometer was digitized by Field Programmable Gate Array (FPGA) device that can design logic circuits by programming. The temperature compensation system for the velocity signal, the frequency compensation system for the temperature signal, and the delay compensation system for improving the spatial resolution have been developed and integrated on the FPGA device. In addition, the pipeline processing was applied to the compensation algorithms in order to accelerate the compensation calculation by using the parallel processing function, which is the advantage of FPGA device.

Free Research Field

流体工学、熱流体計測、組込み技術

Academic Significance and Societal Importance of the Research Achievements

近年では，画像解析や組込みAIの分野におけるFPGAの発展が著しいが，時系列データの計測分野での応用例は少ない．一方，複数の計測原理を複合する必要のある熱流体計測の場合には，FPGAの利点を発揮できると考えられる．
本研究では，FPGAを活用して温度流速計をデジタル化することにより，従来はアナログ回路を基盤としていた計測器の校正や操作，多チャンネル化が容易となり，産業界等への活用の場が広がることが期待される．