1. What are the project phases?
The project cycle has three phases: the modeling phase completes the 3D model within hours using oblique photography and generates inspection routes (one-time baseline work); the collection phase has the drone fly automatically along routes — a 500m-class bridge generates about 100GB of data and over ten thousand photos; the office phase has AI automatically screen and detect defects, map them onto the 3D model and output the report, followed by manual review.
2. How long does each phase take?
| Phase | Duration |
|---|---|
| 3D modeling | Hours (one-time) |
| Data collection | Automatic flight along routes |
| AI detection + report | Automated + manual review |
3. Factors affecting the cycle
Bridge length and structural complexity, inspection scope (whether it includes the girder soffit), accuracy requirements, and restricted-area access all affect the schedule; special structures (cable-stayed, suspension) and high-precision re-capture require additional evaluation.
4. Applicable conditions and scenarios
- Routine bridges delivered quickly via standardized workflow
- Special bridge types and complex sites require schedule evaluation
- Specific scheduling is confirmed by the project plan
5. Notes
The first inspection includes modeling and route planning (one-time baseline work); subsequent inspections directly reuse them, resulting in shorter cycles.