1992 年 12 巻 1Supplement 号 p. 35-38
A new Image Tracing Velocimetry has been developed which uses the standing air bubbles in the circulating water channel as tracers. In this method, small air bubbles are illuminated with laser light sheet whose intensity is varying like saw-teeth wave to mark several sets of time history on a path line. The intensity profile, obtained by this method, is used to estimate the velocity. A feasibility application is made by measuring the uniform flow. Relatively high speed flows (over 1.0m/sec) can be measured by this method.