From a storage to Swiss lakes and rivers: the story of Proteus, an underwater robotic

Proteus and sundown with the Swiss mountains within the background at Lake Thun (picture credit score: Gallus Kaufmann)

In 2018, Christian Engler felt he’d studied sufficient idea on the ETH Zurich and longed to place all of it into follow. It was evident to Christian that one of the simplest ways to get hands-on expertise was to start out one thing himself. Others weren’t so positive. Particularly once they heard about his ambition to revive a mission from highschool.

The mission concerned underwater robots, also referred to as Remotely Operated Autos (ROVs). However now Christian needed to step it up a gear. He not solely needed to construct an ROV, however he additionally needed to participate on the worldwide MATE ROV Competitors 2019 – the most important ROV competitors on the earth. His ardour motivated an extra seven college students and Tethys Robotics was born.

Begin of the journey

To have the ability to compete at a excessive stage, Tethys Robotics wanted help. The principle supporter was and nonetheless is Professor Siegwart and his Autonomous Programs Lab (ASL). As a consequence of a earlier mission, SCUBO, the workforce had the prospect to profit from their expertise and have been ready to make use of their carbon fibre shell to construct their model of the underwater robotic, the SCUBO 2.0.

SCUBO taking a sunbath at Lake Zurich (picture credit score: Gallus Kaufmann)

Whereas the unique SCUBO was developed to movie coral reefs, the brand new model of SCUBO needed to be tailored to fulfil the duties on the MATE ROV Competitors. To stop damaging the coral reefs, the unique SCUBO had a special place and orientation of the eight actuators (also referred to as thrusters) at the price of stability and management. Moreover, no batteries have been allowed on the competitors within the robotic. For that motive, all the electronics, software program interface and controlling needed to be redesigned to have the ability to participate on the competitors.

Basically, the sensors of each SCUBO variations are the identical consisting of Perspective and Heading Reference System (AHRS), strain sensor, stereo digicam and temperature sensor.

The one draw back was that the ASL didn’t have sufficient area to accommodate us. Due to this fact, we ended up working within the lab’s basement. However this didn’t have an effect on our motivation – now full with ‘storage start-up’ vibe – or the profitable final result. Tethys Robotics was the primary Swiss workforce ever to compete. Out of 75 groups, Tethys got here in at ninth place.

Actual world purposes

After the competitors, SCUBO 2.0 was showcased at varied exhibitions. That is how we got here throughout the divers from the Swiss Explosive Ordnance Disposal (EOD), whose mission is to retrieve misplaced ammunition from Swiss lakes. Since it is a harmful and really difficult job for divers, Tethys began collaborating on an underwater robotic as much as the duty. The robotic needed to be modular, light-weight, and simply deployable. With the help of the ASL, the algorithms developed for drones have been carried out to the underwater drones of Tethys Robotics. And by having a number of checks on the operation website with the EOD divers and clean ammunition, the brand new underwater robotic Proteus was developed with an actual world utility in thoughts. With their assist, Proteus has been developed to be modular and extra targeted for use as a diver buddy as an alternative of working individually. Particularly, the underwater drone can be utilized as a raise for materials and as a communication machine to the highest aspect.

Challenges and way forward for Proteus

There have been many modifications to the design and the appliance area between the competitors robotic and the brand new Proteus. Proteus is ready to be deployed in each Swiss lake (+300 m depth score) and is powered once more, as the unique SCUBO, by batteries. The communication and digicam streams are transmitted through a fiber optics cable to a management station on the shore. Furthermore, along with the sensors utilized in SCUBO, Proteus has been upgraded with sensors primarily used for localization and orientation underwater which include a sonar, Doppler Velocity Logger (DVL), acoustic Quick Baseline system (SBL) and occasion cameras.

Proteus mission setup (picture credit score: Gallus Kaufmann)

The present analysis focuses on the development of the underwater localization. The totally different sensors are usually not correct, quick or sturdy sufficient for use in Swiss lakes and particularly rivers. Due to this fact, a sensor fusion algorithm is being carried out to mix some great benefits of the totally different sensors. Moreover, Tethys Robotics is looking for additional purposes and an acceptable market phase to place the developed underwater drones. By discovering additional companions and curiosity, the mission might make the transition to an organization and develop the prototypes to closing merchandise.

tags: c-Analysis-Innovation