Analysis on round-hole orientation error based on structured light stripe vision sensor

Abstract

A binocular stereo vision measurement model was used to inspect the space position of round hole or similar round hole based on the stereo image-pair,for the stereo vision sensor does not meet the requirement for some particular visual inspecting system,especially for the flexible visual inspecting system based on the industrial robot platform.In this paper,a two-step method to inspect the hole center coordinates was presented,and the x,y,z coordinate orientation errors were analyzed in detail based on the structured light stripe vision sensor composed of one camera.According to the error analysis,the z coordinate measurement precision is higher than ±0.25 mm,x and y coordinate measurement precisions higher than ±0.006 mm,respectively.The measured results show that the method is valid by experiment and it greatly expands the actual appliance of the structured light stripe visual inspection system.