摘要
AbstractA new method for automatic processing of Young′s fringe pattern obtained from PIVphotograph is presented. The fringe orientation is determined by searching for the maxi-mum of the function W(a) which is constructed from 2-D Young′s fringe intensity distri-bution.The influence of diffraction halo is removed by a simulated function constructedwith normal function. The fringe spacing is derived by calculating iD Fourier transfor.mation of 1-D fringe intensity distribution.A high measurement accuracy could be ob-tained (the measurement errors of fringe orientation and spacing are less than 0.5°and 1% respectively). Furthcrmore,only a less amount of computation is required.
AbstractA new method for automatic processing of Young′s fringe pattern obtained from PIVphotograph is presented. The fringe orientation is determined by searching for the maxi-mum of the function W(a) which is constructed from 2-D Young′s fringe intensity distri-bution.The influence of diffraction halo is removed by a simulated function constructedwith normal function. The fringe spacing is derived by calculating iD Fourier transfor.mation of 1-D fringe intensity distribution.A high measurement accuracy could be ob-tained (the measurement errors of fringe orientation and spacing are less than 0.5°and 1% respectively). Furthcrmore,only a less amount of computation is required.
