Table 4 Comparison of costs of the different techniques for crack monitoring applied to the case study during one year
Technique | Lifting platform | Equipment, installation and data processing | Technician | Annual cost |
|---|---|---|---|---|
Digital data collection | 1350 € | 6.529 € | 250€ · 12 control visits | 10,879 € |
3D laser scanner | 540 € | 750 € · 12 control visits | 250€ · 12 control visits | 12,540 € |
Comparator | 270 € · 12 days | 144 € · 4 comparators | 250€ · 12 control visits | 6816 € |
Calliper | 270 € · 12 days | 0 | 250€ · 12 control visits | 6240 € |
3D photogrammetry | 540 € | 0 | 250€ · 12 control visits | 3540 € |
2D image-based | 0 | 0 | 250€ · 12 control visits | 3000 € |