Event Details
Effects of Vessel Motion on Echo Sounding in Fisheries
Presenter: Shuya Xiao, ECE Dept
Supervisor:
Date: Wed, July 9, 2003
Time: 14:00:00 - 15:00:00
Place: EOW 430
ABSTRACT
Abstract:
In fisheries acoustics, many techniques of measurement are affected by vessel motion and measurement results are degraded to some degree. This seminar presents a mathematical model to investigate the effects of vessel motion on the single target echo traces that are observed with a downward looking echo sounder. The simulation results demonstrate that vessel roll, pitch, yaw and heave cause distortions on the echo trace display.The effects of vessel motion increase with increasing magnitude of vessel motion and fish depth and with decreasing transducer beamwidth. To minimize these effects, various ways to compensate for vessel motions are investigated, such as, the inverse method, the method of beam stabilization, a non-uniform transmit approach, etc. The model and simulations will be useful to explore the effectiveness and feasibility of these and other procedures designed to improve acoustic observations from a moving platform.
Questions?
Please contact by email: sxiao@ece.uvic.ca