2- METHOD FOR 2-FRAME PTV VELOCITY FIELD MEASUREMENT USING MATCH PROBABILITY

摘要

The invention relates to a method for measuring a velocity field with a quantitative particle-frame tracking technique speedometer of the probabilities manner. Conventional particle tracking speedometer algorithm requires the normal image field of over 3 or more, and in that it considers the locus with a possible displacement vectors size or angle of the minimum variance of the displacement, taking into account all of the individual particles as an effective displacement, the speed, measured a small number of vectors, was defective computation time consuming. Accordingly, the present invention uses the probabilities of the way the algorithm that performs the trace particles from the two input images. Thus, a large number to obtain the speed vector, and the measurement error is less were capable of measuring a wide speed range, the calculation time is very short. In addition, the cost of hardware for use in the present invention is cheap and enables accurate extraction rate of the fluidized particles. In particular, it is also suitable because you get two pieces of input video maneurosseo instantaneous velocity field, if you can take advantage of high-speed video camera, the Grand Duke, you can get a continuous velocity field information of the ceiling conventionally difficult to interpret complex turbulent flow analysis.