1. How is route solidification achieved?
The under-bridge route generated after first-time modeling is permanently solidified as the bridge’s standard operating route. Later inspections directly call the same route; flight trajectory, shooting viewpoint and collection parameters are fully unified, ensuring multi-period data comparability from the source.
2. Reliability of multi-period comparison
With unified flight trajectories and shooting parameters, under-bridge images are collected at the same position and angle. The system automatically matches member points, achieving precise cross-period comparison at the same position and standard, with authentic and valid comparison results.
3. Value of under-bridge defect trend tracking
Under-bridge bearings and girder soffits are defect-prone areas. Multi-period comparison intuitively shows the evolution of crack size and count trends, providing data support for maintenance priority and repair decisions — a key capability of under-bridge digital maintenance.
4. Applicable conditions and scenarios
- Annual tracking projects for bearing and girder soffit defects
- Routine trend monitoring of key bridges
- Multi-period data accumulation linked with full-lifecycle management
5. Notes
Multi-period comparison depends on route solidification; if the bridge structure is modified, routes should be re-planned and the baseline archive updated accordingly.