Digital Compasses for Orientation-Tilt Monitoring in Offshore Deep-Sea Infrastructures: The KM3NeT Case †

Abstract:

The KM3NeT Collaboration is currently constructing two neutrino detectors in the depths of the Mediterranean Sea. An excellent angular resolution will be necessary for an accurate reconstruction of neutrino direction, much as a precise knowledge of the position and orientation of the detector components will be mandatory in order to achieve the required angular resolution. For High-Energy Neutrino Astrophysics program, an angular resolution < 0.05 deg is expected for the sparser detector if synchronization ~1 ns, positioning < 20 cm, and orientation < 3 deg are guaranteed for the Detection Units. The KM3NeT orientation-tilt system, known as “Digital Compasses”, is an Attitude and Heading Reference System (AHRS) board coupled to the inner Central Logic Boards of the detection modules. The AHRS integrates a 3D-magnetometer containing an Anisotropic Magnetoresistive Sensor to estimate the Earth’s magnetic field with a 3D-accelerometer equipped with a Micro-Electro Mechanical System that estimates the acceleration field intensity. The performance of the Digital Compasses, together with the reconstruction of orientation-tilt magnitudes and calibration, will be presented and discussed in this contribution.

Año de publicación:

2022

Keywords:

• KM3NeT
• digital compasses
• attitude and heading reference system

Fuente:

scopus