Monitoring and Reconstruction of the Shape of the Detection Units in KM3NeT Using Acoustic and Compass Sensors †
Institut d’Investigació per a la Gestió Integrada de les Zones Costaneres (IGIC), Universitat Politècnica de València (UPV), Gandia, 46730 València, Spain
†
This paper is an extended version of our paper published in 6th International Electronic Conference on
Sensors and Applications.
‡
Author details are showed in Appendix A.
Sensors 2020, 20(18), 5116; https://doi.org/10.3390/s20185116
Received: 4 August 2020
/
Revised: 29 August 2020
/
Accepted: 1 September 2020
/
Published: 8 September 2020
(This article belongs to the Special Issue Selected Papers from the 6th International Electronic Conference on Sensors and Applications)
The KM3NeT underwater neutrino telescope comprises thousands of optical modules forming 3D arrays to detect the Cherenkov light produced by particles generated after a neutrino interaction in the medium. The modules are arranged in detection units—vertical structures with 18 modules at different heights, anchored to the seabed and kept vertical by the buoyancy of the optical modules and a top buoy. The optical modules are, thus, subject to movements due to sea currents. For a correct reconstruction of events detected by the telescope, it is necessary to know the relative position and orientation of modules with 10 cm and a few degrees accuracy, respectively. For this, an Acoustic Positioning System with a piezoceramic transducer installed in each module and a long baseline of acoustic transmitters and receivers on the seabed are used. In addition, there is a system of compass and accelerometers inside the optical modules to determine their orientation. A model of mechanical equations is used to reconstruct the shape of the detection unit taking as input the information from the positioning/orientation sensors and using the sea current velocity and direction as free parameters. The mechanical equations take the buoyancy and the drag force of the elements of the detection unit into account. This work describes the full process that is implemented in KM3NeT to monitor the modules and the shape of the detection units from the measured position and orientation data.
View Full-Text
Keywords:
underwater acoustics; sensors positioning; KM3NeT
▼
Show Figures
Figure 1
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited
MDPI and ACS Style
D.Tortosa, D., on behalf of the KM3NeT Collaboration. Monitoring and Reconstruction of the Shape of the Detection Units in KM3NeT Using Acoustic and Compass Sensors. Sensors 2020, 20, 5116. https://doi.org/10.3390/s20185116
AMA Style
D.Tortosa D on behalf of the KM3NeT Collaboration. Monitoring and Reconstruction of the Shape of the Detection Units in KM3NeT Using Acoustic and Compass Sensors. Sensors. 2020; 20(18):5116. https://doi.org/10.3390/s20185116
Chicago/Turabian StyleD.Tortosa, Dídac on behalf of the KM3NeT Collaboration. 2020. "Monitoring and Reconstruction of the Shape of the Detection Units in KM3NeT Using Acoustic and Compass Sensors" Sensors 20, no. 18: 5116. https://doi.org/10.3390/s20185116
Find Other Styles
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.
