Study on the movable detection method about inland vessels ultra-draft violations

Since sand under water occurs siltation and leads to clogging issue, it has become a serious security problem to ships in inner-river. Therefore, it is very important to lay mattress in waterway to cure sediment and ensure the normal depth. However, due to the underwater flow speed, laying mattress is very difficult. The Mattress is often in offset position, and this could result in exposing riverbed and making waterway construction failed. It is necessary to study technologies for measuring the quality of mattress construction. But water in Yangtze River is turbidity, it is difficult to get accurate signal about the constructing under the water by using normal method. In this paper, a valid solution is proposed for this problem. Water sink drain laying information is obtained by using side-scan sonar, and the images of mattress construction underwater is formed with these signal characteristics. Also an integrated management information system is designed to manage the mattress projects, construction units, the engineering vessels, testing procedure and test results. The application result shows that the relevant technology and management system proposed in this paper is effective.