Fig. 1. Line structured light sensor measurement model

Fig. 2. Circular hole imaging coordinate system transformation

Fig. 3. Line structured light sensor measures round hole

Fig. 4. Error model of normal vector affecting hole center coordinates

Fig. 5. Distance error caused by the normal vector to hole center coordinates. (a) d=1 mm; (b) d=2 mm; (c) d=3 mm; (d) d=4 mm

Fig. 6. Distance error caused by single point accuracy on hole center coordinate. (a) v=0.01 mm; (b) v=0.04 mm; (c) v=0.07 mm; (d) v=0.10 mm

Fig. 7. Experiment platform

Fig. 8. Angle between the normal vector of two adjacent circular holes

Fig. 9. Distance results of hole center

Fig. 10. Calculation results of radius of round hole. (a) Hole 1; (b) hole 2

Fig. 11. Result of measuring radius using two methods