Inspection of a cracking tower and detection of disorders
Inspection of a cracking tower: Photogrammetry views of the 4 sides of the chimney. Job done from 6500 aerial shots taken by the company Fovea Expertises, specialized in technical inspections by drones.
Orthophotos of the each face
![Inspection of a cracking tower](https://www.dronesimaging.com/wp-content/uploads/2015/10/Inspection_chemin%C3%A9e_raffinerie_Drones-Imaging%C2%A9.jpg)
The flight automation programmed with the drone X6 Mikrokopter allowed to photograph the whole 360° cracking tower (with ultra high definition: pixel at 0.6 mm). The images acquired were then used to model the structure in 3 dimensions, allowing the export of 4 georeferenced orthofaces. These 4 orthophotos were sent directly on D+3 to the design office responsible for quantifying and locating the defects without the refinery having had to carry out a functional shutdown of the chimney or having resorted to risky human intervention on the superstructure .
Positive detections noted on the structure:
Cracks.
Bursts.
TECHNICAL INFORMATIONS
- Post-processing service : Drones Imaging company.
- Flights and aerial imagery : Fovéa Expertises company.
- Spatial accuracy : relative centimeter.
- Orthophoto RVB : GSD 0.6mm.
- Drone : Mikrokopter X6.
- Camera : Panasonic GH4.
- Photogrammetry software : Metashape.
- Export formats : GeoTiff and Obj.
- Delivery Delays : 3 days.