Ultra high resolution sub-bottom profiling for detection of thin layers and objects

摘要

Due to the increased focus on polluted sedimentation and detection of buried objects a sub-bottom profiler suited for application in detection thin sediment layers and buried objects has been developed. The system is based on a parametric array for producing very narrow, low frequency beams. The acoustic beam can be steered electronically to both sides making it possible to cover a 3D volume of sub-bottom sediments as the profiler is moved ahead. Furthermore this type acoustic source has an inherent high relative bandwidth and virtually no ringing resulting in a very high spatial resolution. Examples of results obtained with the system are shown.