Measuring Tank
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For the calibration and functional testing of our underwater equipment, a dedicated measuring tank with dimensions of approximately 5 m × 5 m × 5 m is available. The tank is equipped with special absorbers on the side walls and the bottom to minimize reflections and interferences during acoustic measurements. REGUPOL playfix FX mats are used as damping material. These mats are made of rubber granulate and may influence the pH value and chlorine content of the water under certain conditions. To ensure consistent water quality and to protect the sensors in use, we maintain controlled water treatment. The pH value should ideally be in the range of 7.2 to 7.6 to enable effective yet material-friendly chlorination. The free chlorine concentration is maintained between 0.3 mg/L and 0.6 mg/L, while the total chlorine content should not exceed 1.0 mg/L. To adjust the pH value, we use standard pH-minus or pH-plus granules. If deviations occur due to the mats or other influences, fresh water is added to the tank as an additional measure to restore the water parameters to the desired range.
Responsabilities
| Who | What |
|---|---|
| Lukas Schirmer | Water measurements |
| Finn Röhrdanz | Pool cleaning |
Water Measurements - PH Value
Water Measurements - Free Chlorin Value
Water Measurements - Total Chlorin Value
Actions - Planned and Taken
| Date | Contents | Success or Failure |
|---|---|---|
| 21.10.2025 | Pool cleaning with robot | Done (Water quality really bad). |
| 24.09.2025 | Pool cleaning with robot | Done (Water quality really bad). |
| 08.08.2025 | Pool cleaning with robot | Done (No real cleaning effect). |
| 07.07.2025 | Pool cleaning with robot | Done (Finn 10.07.2025). |
| 16.06.2025 | Pool cleaning with robot | Done (Finn 17.06.2025)! Robot did not collect much/any dirt. Problems occured at screws, nevertheless beeing able to complete cleaning. |
| 01.06.2025 | Freshwater inlet via local hose for about 2 days | Water was much clearer compared to before |
In March 2026, the DSS Chair attended the annual DAGA conference in Dresden. Thanks to the support of the GaS-Club, the student Aylin Kösker was given the opportunity to accompany the chair and participate in the conference from March 23rd to March 26th. As part of the daily poster sessions, she presented the results of her bachelor’s thesis “Machine Learning for the Analysis of Hydrographic Data to Assess the Waterside Accessibility of Port Waters” in the field of Underwater Acoustics. The thesis forms an important basis for an ongoing university research project on the acoustic analysis of sediment properties in harbor areas. The poster session enabled valuable discussions with researchers and conference participants from related research fields.