FLUCTUATION IMAGE ANALYSIS METHOD AND FLUCTUATION IMAGE ANALYSIS SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a fluctuation image analysis method and a fluctuation image analysis system capable of improving SNR with a simple constitution and highly precisely acquiring unsteady fluid phenomena.;SOLUTION: This fluctuation image analysis system consecutively acquires, with time, images of an object 1 to be measured which is applied with pressure-sensitive paint and where the intensity of the light emission on the surface is changed by a change in the pressure, and at the same time, measures, with time, the pressure to be a reference on the surface of or adjacent to the object 1 to be measured. A pressure fluctuation having a predetermined frequency is extracted by a band-pass filter based on a time change in the measured reference pressure. A phase of each image in the extracted pressure fluctuation period is acquired based on the time when each image is acquired. Each image is distributed to a plurality of phase bands based on the acquired phase of each image, and the plurality of images included in each phase band are averaged to acquire an average image for every phase band.;COPYRIGHT: (C)2012,JPO&INPIT