3D full field displacement measurement of seismic shaking table experiment

A large field 3D displacement measurement method based on binocular stereo vision technology was proposed to measure the displacement of the seismic shaking table experiment. First of all, a robust marking point stereo matching algorithm was proposed. Besides, based on the VS2010 development environment, the threedimensional full field displacement measurement system was developed for seismic shaking table experiment. Finally, in order to verify the methods accuracy in the experiment of large view, the accuracy evaluation experiment was designed. And the shaking table experiment of high slope model was measured by the developed experimental system. Experimental results show that the static displacement measurement error is less than 0.4 mm, the dynamic displacement measurement error is less than 0.5 mm, which can meet the requirements of shaking table experiment in the field of 3 m1.5 m. Moreover the method proposed can be convenient and intuitive to measure the displacement field of the high slope model in earthquake shaking table experiment. And the X, Y, Z three direction displacement curves and the total displacement curve are reasonable. It is an effective method to measure the full field displacement of the seismic shaking table experiment.