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photogammetry

Underwater Photogrammetry

In recent years, underwater photogrammetry has been introduced and even implementations of unmanned underwater vehicles (UUVs) have been used to explore the underwater environment. Johannes Lienhart tackles the challenge of implementing underwater photogrammetry for use in Swiss lakes. Possible use cases of such a setup are the inspection of underwater structures and the investigation of the sedimentation process of the lake bottom. The project addresses the challenges associated with an underwater photogrammetry setup, particularly the poor visibility in Swiss lakes compared to other studies in marine environments. The main part of the project is dedicated to building the hardware, testing its basic functionality and interfacing it with the UUV Proteus from Tethys Robotics.

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Introduction of Proteus

Happily presenting our newest diving robot: Proteus. Named after a greek sea god.

Proteus is a totally redesigned underwater drone and allows us to reach new depths, see the underwater world in great detail even if it is dark and turbid. It is developed to easily mount sensor suites, transmit data at high speeds, and a lot more.

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Maiden Run

Last weekend, our newest robot Proteus from Tethys Robotics was allowed to dive into the Lake of Zurich for the very first time and obviously felt the freedom.

It is a big step for us! Because this robot is the first completely self-developed robotics system of Tethys Robotics and everything works perfectly. We are very proud.

You want to learn more? Please follow this link: https://tethys-robotics.ch/index.php/robots/proteus/

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Feature-Based Estimation of 3D Clouds with Forward-Looking Imaging Sonar

Bastian Schildknecht tackles the problem of 3D reconstruction of underwater environments by constructing point clouds from sonar images. Having access to accurate maps can often be crucial for many underwater operations. For that reason, a feature-based method for the estimation of landmark positions in 3D coordinates was built. This is done by feature extraction and feature matching on sonar images in order to acquire landmarks. These landmarks then get registered and integrated into the 3D reconstruction by using a novel iterative optimization method for estimating the landmark positions. To verify the performance of the reconstruction method, the self-developed sonar simulator with a synthetic data set is used.

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Science City

Last Sunday, we had the opportunity to show again our ROV SUBO 2.0 at the event of Science City in the main building of the ETH Zurich. The theme of the event was „The Ocean“. It was a very interesting day and we could inspire young and old.

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First Swim In The Lake Of Zurich

SCUBO 2.0 has been looking forward to this weekend for a long time. Swimming in the nearby Lake Zurich in bright sunshine and late summer temperatures. Also the divers were enthusiastic to accompany a diving robot underwater and were amazed how much power the robot had. Click on the picture and enjoy the video.

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Success in the USA!

We are very happy to announce, that Tethys Robotics has reached 9th place at the 2019 MATE international ROV championship. After months of hard work and ups and downs we were able to reach the top ten in a field of 60 international teams! We would like to especially thank our supporters, partners and fans for the ongoing support and trust. Without you, none of this would have been possible.

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Competition Day

Today we had our two pool runs. After some troubles with the first run in the morning, we got everything dialed in and had a very successful pool run in the afternoon. SCUBO performed great and the omidirectional steering once more turned out to be extremely helpful for all different tasks and an eye catcher for the spectators.

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First Swim In The USA

Today we were able to test SUBO 2.0 the first time after the transport. After some tuning, SCUBO mastered it’s first dive in american waters perfectly. Now we are all very exited for the first day of competition tomorrow.

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