Experimental results on EKF-based underwater localization algorithm using artificial landmark and imaging sonar

This paper proposes an underwater localization algorithm using artificial landmarks with imaging sonar. It is organized as follows; 1) recognizing artificial objects 2) A look at EKF (Extended Kalman Filter) SLAM for lacalization. Acoustic images from imaging sonar are very unstable, for this reason we developed artificial landmarks that can easily be detected in noisy environments. We also designed a probability-based, recognition framework. In this way, the distance and bearing of the recognized artificial landmarks are acquired, allowing us to perform the localization for our underwater vehicle. And then, EKF-based localization algorithm is carried out the localization which produce a path of underwater robot and a location of landmarks. The proposed localization algorithm is verified by experiments in a basin.