Part of the same image speed measurement process, part of the same image speed measurement method for a three-dimensional space, part of the same image speed measurement system and tracer portion chen - generating means in a part of the same image speed measurement system

摘要

A part of the same image speed measurement system, is provided, which tracer portion of the tracer portion chen - supply with to a flow field around an object (12) feeds around an image of reflected light by means of imaging means (32a, 32b), of the tracer portion by a double irradiation with laser light at different points in time and a velocity vector of the flow field on the basis of the two resulting images of the tracer portion chen determined. The two images are, respectively, in a plurality of divided test areas, and if it by a comparison between a first maximum value fp and a second maximum value sp of a cross correlation value of a pattern of tracer part of the filament in each test area of the two images, it has been established that the first maximum value (fp) / second maximum value (sp) ≧ 1,2 is satisfied, then is determined that the reliability of the velocity vector is high. Thus, it is possible to improve the measuring accuracy of the flow condition, in that faulty vectors be reliably determined.