Author Affiliations
1 Institute of Mechanical & Power Engineering, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, China;1 Robotics & Engineering Research Center, Harbin University of Science and Technology, Harbin, Heilongjiang 150080, China;show less
Fig. 1. Geometric model of discrete measurement
Fig. 2. Camera coverage model
Fig. 3. Schematic of visibility constraint
Fig. 4. Schematic of incident angle constraint
Fig. 5. Schematic of field of view constraint
Fig. 6. Schematic of depth constraint
Fig. 7. Schematic of practical measurement model. (a) Top view of propeller body; (b) front view of propeller body
Fig. 8. Simulation model of measured object
Fig. 9. Convergence procedure of first objective function
Fig. 10. Convergence procedure of second objective function
Fig. 11. Network layout of visual measurement
Fig. 12. Measurement model
Fig. 13. Comparison of three-dimensional uncertainty and standard deviation
Fig. 14. Three-dimensional reconstruction effect of measurement object
Number of layout | Number of coverage points | Coverage rate /% | Standard deviation /mm | Mean value of standard deviation /mm | Simulation target value /mm |
---|
| | Xσ | Yσ | Zσ |
---|
5 | 75 | 75 | 0.1805 | 0.1271 | 0.1472 | 0.1516 | 0.0828 | 10 | 88 | 88 | 0.1149 | 0.0807 | 0.0993 | 0.0983 | 0.0554 | 15 | 96 | 96 | 0.0826 | 0.0554 | 0.0714 | 0.0698 | 0.0396 | 20 | 99 | 99 | 0.0684 | 0.0399 | 0.0426 | 0.0503 | 0.0326 |
|
Table 1. Comparison of measurement network coverage and measurement accuracy