CONSIDERATION OF THE PORT CONSTRUCTION AND MAINTENANCE WHICH UTILIZED 4D SONAR SYSTEM

Abstract

 Construction industry is eager to promote the Port I-Construction which is domestic policy to solve labor shortage and productivity improvement. It is indispensable to visualize high precision and Real-time underwater structure for the Port I-Construction.
 Generally, the Narrow multibeam surveying system is used for under water visualization. However, this system difficult to apply for Real-time visualization.
 In this study, we conducted a series of experiment in dry dock to measure the underwater structures by using 4D sonar system. To evaluate the accuracy, the results were compared with that of ground laser measurement which was surveyed after drainage, and the design configuration.
 To fulfill the requirements for Port I-Construction, a practical 4D sonar system which can survey the form, size, coordinates, etc. of the structures at Real-time was introduced. The accuracy, usefulness and noise processing method were taken into account for evaluation the applicability of the 4D sonar system in port and harbor works.