Engineering application of MEMS vector hydrophone and self-adapting root-MUSIC algorithm

Abstract

The MEMS technology is a new attempt to design hydrophone. In this paper, the fundamental principle of a novel biomimetic MEMS vector hydrophone based on the meso-piezoresistive effect is introduced, and a selfadapting root-MUSIC algorithm for vector hydrophone array is proposed. The simulation experiment results show the better performance with low Signal-to-Noise (SNR) in direction of arrival (DOA) estimation, and it is also applied in lake trials of MEMS vector hydrophone array. The experiment results show the engineering practicability of MEMS vector hydrophone and self-adapting root-MUSIC algorithm.

Error Self-Calibration Algorithm for Acoustic Vector Sensor Array

“…A novel biomimetic MEMS vector hydrophone in Figure 1 has been developed for acoustic detection application [3][4][5][6], which is based on the meso-piezoresistive effect and the acoustics theory of cylinder. It exploits the thin film of quantum as well as the sensitive unit, which adopts cilia bionic structure.…”

“…By taking advantage of the extra information, acoustic vector sensor array is able to improve the direction-ofarrival (DOA) estimation performance without increasing array aperture size. Nehorai and Paldi have developed the measurement model of the acoustic vector sensor array for dealing with narrowband sources [1]; many methods such as MUSIC algorithm and root-MUSIC algorithm have been proposed for applying acoustic vector sensor array to DOA estimation problems [6][7][8][9].…”

“…Therefore, the performance of these high resolution DOA estimation algorithms will be seriously deteriorated and will even fail. In [6], a self-adapting root-MUSIC algorithm is proposed and successfully applied in lake trials of MEMS vector hydrophone array. In order to ensure the estimation accuracy of the proposed algorithm, we corrected the array which is composed of two MEMS hydrophones in advance, so we got better results.…”

“…The MUSIC spectrum in the influence of comprehensive error 6. Journal of Sensors which represent the straightening operation of matrix Γ, thenΓa θ = α θ δ, 24Error self-calibration algorithm for AVS array.…”