CONTAINER SHIP CELL GUIDE ACCURACY CHECK TECHNOLOGY BASED ON IMPROVED 3D POINT CLOUD INSTANCE SEGMENTATION

Generally, cell guides are installed in the cargo hold of container ships, which improve the loading and unloading efficiency of containers and fix containers when the ship is sailing. However, in actual production, due to the low accuracy of ship loading in sections, and the deviation of welding shrinkage and expansion in relevant sections, errors occur in the loading process of containers, resulting in hidden safety risks or significant economic losses. Given the above situation, it is particularly important to find a high-efficiency cell guide accuracy inspection method for construction monitoring. 3D scanner to obtain three-dimensional data is presented in this paper, based on this paper proposes a new method, this method will be used based on improved instances of 3 d point cloud segmentation model to cell guide the segmentation, and fitting container ship cell guide structure, and then realize the function of container simulation test box, cell guide after the segmentation precision inspection at the same time, for the practicality review, we compared the accuracy data gained from inspection simulation and the measured data. As a result, it was confirmed that both values were within about ±1.5mm. The validity, and reliability of the method are further verified

Architecture of the Product State Model Environment: The QualiGlobe Experience of Production Efficiency

This paper addresses the issue of using product models to support product lifecycle activities with particular focus on the production phase. The motivation of the research is that products are produced more costly and with longer lead-time than necessary. The paper provides a review of product modelling technologies and approaches, and the overall architecture for the Product State Model (PSM) Environment as a basis for quality monitoring. Especially, the paper focuses on the circumstances prevailing in a one-of-a-kind manufacturing environment like the shipbuilding industry, where product modelling technologies already have proved their worth in the design and engineering phases of shipbuilding and in the operation phase. However, the handling of product information on the shop floor is not yet equally developed. The paper reports from the Brite-Euram project (No. BE97-4510) QualiGlobe focusing on the development activities of the PSM architecture. An example discusses how to handle product related information on the shop floor in a manufacturing company and focuses on how dynamically updated product data can improve control of production activities. This prototype example of welding a joint between two steel plates serves as proof of concept for the PSM architecture

Assessing Sustainability in the Shipbuilding Supply Chain 4.0: A Systematic Review

The supply chain is currently taking on a very important role in organizations seeking to improve the competitiveness and profitability of the company. Its transversal character mainly places it in an unbeatable position to achieve this role. This article, through a study of each of the key enabling technologies of Industry 4.0, aims to obtain a general overview of the current state of the art in shipbuilding adapted to these technologies. To do so, a systematic review of what the scientific community says is carried out, dividing each of the technologies into different categories. In addition, the global vision of countries interested in each of the enabling technologies is also studied. Both studies present a general vision to the companies of the concerns of the scientific community, thus encouraging research on the subject that is focused on the sustainability of the shipbuilding supply chain

A METHODOLOGY FOR IMPROVING PRODUCTIVITY OF THE EXISTING SHIPBUILDING PROCESS USING MODERN PRODUCTION CONCEPTs AND THE AHP METHOD

In recent years, shipyards have been facing difficulties in controlling operational costs. To maintain continual operation of all of the facilities, a shipyard must analyze ways of utilizing present production systems for assembling interim vessel products as well as other types of industrial constructions. In the past, new machines continuously improved shipbuilding processes, including software and organizational restructuring, but management continued to search for a modern technological concept that will provide higher productivity, greater profit and overall reduction in costs. In the article the authors suggest implementing Design for Production, Design for Maintainability and Group Technology principles using the Analytical Hierarchy Process (AHP) to apply to multi criteria decision making methods as an efficient tool for maintaining international competitiveness in the modern shipbuilding industry. This novel methodology is implemented through four phases. In the first phase, the present situation analysis is suggested for a real shipyard by establishing closest relations among production lines. The second phase presents a constraint analysis that must be evaluated when developing the design solution. The third phase involves generating a typical number of selected alternatives of the Design for Production, Design for Maintainability and Group Technology principles. In the fourth phase, the optimal design solution is selected using the Analytical Hierarchy Process (AHP) method. The solution incorporating this modern methodology will improve productivity, profit and lead to decreasing operational costs

IIoT-Enabled Manufacturing Process Monitoring and Resource Positioning

Department of System Design and Control EngineeringScheduling and planning are the central functions to increase the productivity in manufacturing. In a shop floor, these functions should be deployed in a real-time manner by considering the dynamic conditions of manufacturing processes. In this regard, the prerequisite is seamless manufacturing process monitoring to acquire live workplace data. Manual data acquisition by experienced workers can provide a reliable process report at low cost. However, this may shoulder additional responsibilities of the current workload which can affect job performance in a negative way. Recently, industrial internet-of-things technology with advanced sensors and long-ranged telecommunication devices have enabled us to acquire high quality workplace data. Therefore, the objective of this study is to develop a manufacturing process monitoring system that provides two main functions: (i) a production progress monitoring and (ii) a manufacturing resource positioning. To do this, we first analyze a target manufacturing system and extract the key characteristics for production progress monitoring. We then discuss how to select the appropriate process data and determine the data acquisition method. Production progress is measured by comparing the acquired field data with the scheduled manufacturing plan. We estimate manufacturing resources positions and workspace by (i) analyzing the operation data of overhead cranes in a shipyard and (ii) interpreting correlation lags between acoustic signals obtained by multiple microphone sensors. The developed manufacturing process monitoring system is illustrated and demonstrated with the case study of ship block assembly monitoring.clos

CURRENT APPROACHES TO THE MANAGEMENT OF NAVAL SHIPBUILDING PROJECTS

The paper deals with the analysis of development and trends in the field of management of naval shipbuilding projects. The introductory part gives an overview of project management in the defense sector as well as in the naval shipbuilding sector. The analysis of naval shipbuilding project management is done through consideration of four criteria: naval strategy and long-term planning, shipbuilding industrial base, workforce, and project management organization. Due to limited resources, five countries were selected: the United States of America (USA), the United Kingdom (GBR), Australia (AUS), New Zealand (NZL), and Croatia (HRV). After individual countries have been analysed, synthesis and comparison of results were presented in tabular form. The conclusion is based on global trends in this area, how the naval shipbuilding project management in the Republic of Croatia is harmonized with them, and recommendations for improving the process of managing naval projects in the Republic of Croatia. The scientific contribution of the paper is in defining a systematic approach to managing naval shipbuilding projects that could serve as a generic model on which the future organization and management processes of naval shipbuilding projects in the Republic of Croatia and other maritime countries, that are comparable in economic strength and defense needs, may be founded

Phased-based management at Aker Yards Langsten : a lean shipbuilding perspective

Confidential until 23-jan-201