natural science foundation of Hubei ProvinceNatural Science Foundation of Hubei Province [2007ABA086]
机构署名：
本校为第一且通讯机构
院系归属：
机械工程学院
数学与计算机学院
摘要：
In this paper, the principle of measuring infinitesimal displacement by laser speckle is proposed to measure the velocities of particles in ER fluids. It is verified that speckles can be formed by illuminating laser beam on the starch ER fluids. The speckle patterns was recorded with high speed CCD camera, and the speckle patterns sequences with short time intervals was obtained by intercepting laser speckle video. Displacements parallel to the direction of electric field and that perpendicular to the direction of electric field were obtained by processing the two consecutive speckle patterns....
