Binocular stereo vision measurement model is used to inspect the spacial position of round hole or similar round hole based on the stereo image-pair. The stereo vision sensor does not meet the need of some particular visual inspection system

especially for the flexible visual inspection system based on the industrial robot platform

because of the limits of the cost

volume

weight and so on. Based on the structured light stripe vision sensor composed with one camera

the two-step method to inspect the hole center coordinates is presented

and the x

y

z coordinates orientation error is analyzed exhaustively. According to the error analysis

the z coordinates measurement precision excels ±0.25mm

x and y coordinates measurement precision excels ±0.006mm respectively for the practical inspection application system. It shows that the method is valid by experiment and greatly expands the actual appliance of the structured light stripe visual inspection system.