Development of an acoustic transceiver for positioning systems in Underwater Neutrino Telescopes

Details Development of an acoustic transceiver for positioning systems in Underwater Neutrino Telescopes Development of an acoustic transceiver for positioning systems in Underwater Neutrino Telescopes

2012-04-04

arxiv.org/abs/1204.0900v1

Astronomy and Astrophysics

Astrophysics

Instrumentation and Methods for Astrophysics

6 pages, 10 figures

Scientific paper

In this paper, we present the acoustic transceiver developed for the positioning system in underwater neutrino telescopes. These infrastructures are not completely rigid and need a positioning system in order to monitor the position of the optical sensors of the telescope which have some degree of motion due to sea currents. To have a highly reliable and versatile system in the infrastructure, the transceiver has the requirements of reduced cost, low power consumption, high intensity for emission, low intrinsic noise, arbitrary signals for emission and the capacity of acquiring and processing the received signal on the board. The solution proposed and presented here consists of an acoustic transducer that works in the 20-40 kHz region and withstands high pressures (up to 500 bars). The electronic-board can be configured from shore and is able to feed the transducer with arbitrary signals and to control the transmitted and received signals with very good timing precision. The results of the different tests done on the transceiver in the laboratory are described here, as well as the change implemented for its integration in the Instrumentation Line of ANTARES for the in situ tests. We consider the transceiver design is so versatile that it may be used in other kinds of marine positioning systems, alone or combined with other marine systems, or integrated in different Earth-Sea Observatories, where the localization of the sensors is an issue.

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