G0500-3-3 FPGAを用いた温度・速度同時計測システムのデジタル化([G0500-3]流体工学部門一般講演(3))

概要

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In this study, the compensation algorithm of the thermo-anemometer was improved for the high-precision simultaneous measurement of temperature and velocity fields by digitisation employing FPGA (Field Programmable Gate Array). The first-order lag due to the thermal time constant on the cold-wire sensor was compensated with the digital filter comprised the first-order lead characteristic designed by the bilinear transformation. The temperature compensation was indispensable for the velocity measurement, owing to the response of the hot-wire anemometer depended on both the velocity and the temperature variations in the stratified flow fields. The algorithm incorporated the correct term relative to the physical properties was implemented on FPGA. In the temperature difference range of 0℃ to 60℃, the high-accuracy velocity measurements were realized with an uncertainty of less than 0.92% from the simultaneous and mutual compensation system.
一般社団法人日本機械学会の論文
2010-09-04