| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for measuring the surface speed and flow rate of a liquid in a tube, an opened or closed canal and a water channel. SOLUTION: In this case, the method includes the steps of: optically measuring the direction and value of the speed 6 of an object 2 in a range of a liquid surface 1; measuring a liquid level; automatically recognizing the image of the object 2; calculating the speed distribution of the object having temporally and spatially high resolution; calculating a typical surface speed v<SB>0</SB>of the liquid from the results of this step; obtaining a liquid running area A from the value of an actual liquid level and a stored data set; and multiplying the typical surface speed v<SB>0</SB>by the area A and a coefficient (k). The coefficient is obtained from the stored data set, and the value of the coefficient is derived from numerical calibration or experimental calibration of the measurement part. COPYRIGHT: (C)2009,JPO&INPIT
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