多熱線プローブの三次元有効設置角度の検定法に関する研究 : 第1報, 傾斜熱線の有効設置角度の意味とその検定のアルゴリズム

概要

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In order to measure the velocity vector in terms of a multiple-wired probe, one has to know the exact angles of each wire. The authors propose a new calibration method based on the concept of "apparent angle" of the wire, which also enables one to avoid bias error caused by directional approximation. The authors introdudeced a calibration table driven by two stepping motors wich are controlled digitally by a microcomputer system, by which arbitrary direction of the wind against the hot wire probe is obtained. Through trials using various wind directions, the hot wire angle is calculated under the condition of the least square of error. The thus obtained hot wire angle is interpreted as the "apparent setting angle" because it automatically cancels the bias error of the approximation function. The present method can be used for velocity vector measurement to give higher accuracy of the result.
一般社団法人日本機械学会の論文
1990-07-25