LAUV Roald
LAUV Roald
The unique functionality of LAUV Roald is the capability to capture pictures of microscopic objects floating in the water. Thus, it is particularly interesting for biologist where it can combine traditional measurements of the water column with images.
In addition it contains a lot of computational power for doing online processing of images and sensor data to enable adaptive sampling.
Technical specifications
| Vehicle length | 226cm |
| Weight in air | 35 kg |
| Max operational depth | 100m |
| Speed | 0.5 to 2 m/s |
| Battery | 250Wh (6x) Li-ion |
| Typical endurance | 9h @3kn, full payload |
| Main CPU | AMD Geode LX 800 CPU |
| User Computers | Jetson TX1, Jetson TX2 |
| Data storage | 3TB |
Communications
- WLAN up to 1 km with the Manta modem
- GSM within 3G coverage
- Evologics S2CR 18/34 USBL underwater acoustic modem for a link up to 1km, depending on water conditions.
- Iridium SBD module
- Emergency acoustic pinger and directional hydrophone with up to 2km range
- External GigaBit Ethernet connector for transferring data.
Sensors
| AHRS | Microstrain 3DM-GX4-25 |
| DVl | Nortek DVL 1000, with ADCP capabilities. |
| ADCP range | 30 meter. Bottom track range: 75 meter. |
| CTD | AML |
| Dissolved Oxygen | Aanderaa Optode 4831F |
| Chlorophyl | Tuner Cyclops7 |
| Turbidity: | Tuner Cyclops7 |
Silcam
An onboard silhouette camera (SilCam), designed by SINTEF, is integrated into the hull of the AUV.
As water flows through a backlighted capture volume, the SilCam captures images, while keeping objects in the entire volume in focus.
The SilCam can capture objects with size between 100 $\micro$ m and 12 mm. Further onborad processing and classification of captured objects based on the PySilCam software can be performed.