Abstract

There are inherent accuracy defects in the separate calibration of installation deviation of multi-beam transducers. In order to improve the calibration accuracy of transducer installation deviation in three-dimensional direction, a comprehensive calibration algorithm for multi-beam transducer installation deviation is deduced based on the known seabed topographic feature points as matching datum, taking full account of the influence of bathymetric survey, navigation positioning and attitude measurement errors. Taking the measured data in the sea area near Beihai of Guangxi as an example, the results show that the algorithm can effectively calculate the angle installation deviation of the transducer. The algorithm studied in this paper provides a strong theoretical support and practical basis for improving the installation deviation calibration of multi-beam transducers and improving the calibration accuracy.

Keywords:Multi-Beam transducer; Installation deviation; Comprehensive calibration; EIV model; Total least squares; Terrain feature points