1. What is the difficulty of under-bridge navigation?
GPS signals are blocked under the bridge, so conventional drones cannot position or navigate there — a long-standing industry pain point. Blind spots such as bridge bottoms and girder soffits have therefore been hard to cover in traditional inspection.
2. How does the autonomous navigation module work?
RIEJIAN’s self-developed under-bridge autonomous navigation module: the drone uses GPS positioning while flying along the side of the bridge, then seamlessly switches to the autonomous navigation module after entering under the bridge, achieving stable positioning and autonomous flight in signal-free environments with centimeter-level accuracy, solving the inspection problem of blind spots such as girder soffits and bearings.
3. Application scenarios for under-bridge navigation
| Scenario | Application |
|---|---|
| Girder soffit inspection | Stable flight in signal-free environments |
| Bearing inspection | Centimeter-level precise positioning |
| Shaded sides of bridge towers | Coverage of complex areas |
4. Applicable conditions and scenarios
- Signal-free areas such as girder soffits, bearings and shaded tower sides
- Bridge projects requiring full under-bridge coverage
- Automatic switching with GPS scenarios for seamless full-bridge operation
5. Notes
Under-bridge spaces are narrow and structurally complex; operations must combine obstacle avoidance and route planning, and it is recommended that professional teams with under-bridge experience perform them.