Abstract
Parametric acoustic array can generate a low frequency narrow sound beam with sufficient penetrating ability with a small size transducer. Besides, the generated beam has almost no side lobe, and it is easy to form a wide band signal at low frequencies, thus effectively improving the signal processing gain. Therefore, broadband parametric array shows advantages in shallow water sub-bottom profiling. In this paper, the signal processing algorithm of transmitting end and receiving end of parametric array sonar was studied, and a parametric array sub-bottom profiler was designed and realized for experimental verification. Based on Berktay’s far-field solution, the performance of different modulation methods was analyzed and compared, and suppressed carrier double-sideband modulation was chosen as the optimal modulation method. Furthermore, corresponding echo signal processing algorithm was designed to improve the detection resolution. According to lake trials of the broadband parametric array sub-bottom profile measurement system as designed, a clear sub-bottom profile was obtained, which verified the system’s effectiveness.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
