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Development and testing of a Dual Accelerometer Vector Sensor for AUV acoustic surveys

A. Mantouka,
P. Felisberto,
P. Santos,
D. Maslov,
S.M. Jesus
LARSys, University of Algarve,
Campus de Gambelas, PT-8005-139 Faro (Portugal).
L. Sebastião
Institute for Systems and Robotics, Instituto Superior Técnico, Lisboa (Portugal).

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Ref.: 3rd International Electronic Conference on Sensors and Applications, 15-30 November, 2016.

Abstract: This paper presents the design, manufacturing and testing of a Dual Accelerometer Vector Sensor (DAVS). The device was built within the activities of the WiMust project, a EU project, supported under the Horizon 2020 Framework Programme, which aims to improve the efficiency of the methodologies used to perform geophysical acoustic surveys at sea by the use of Autonomous Underwater Vehicles (AUVs). The DAVS contributes to this aim in various ways, for example, owing to its spatial filtering capability, it can measure reflections at the desired direction therefore reducing the amount of post processing related to deghosting and multipath removal. Also its compact size allows easier integration with AUVs and hence facilitates the vehicle manoeuvrability compared to the classical towed arrays. The DAVS device consists of two tri-axial accelerometers and one hydrophone moulded in one unit. The device’s directional estimation capabilities were evaluated on an AUV, which was sailing around a deployed sound source. Results of this experiment are presented in this paper.

ACKNOWLEDGMENT: This work was funded under project WiMUST contract 645141, H2020 program of the EU.