scholarly journals Assessment of the technical condition of ship hulls using mobile magnetic devices

2021 ◽  
pp. 54-58
Author(s):  
С.И. Корягин ◽  
Н.Л. Великанов ◽  
О.В. Шарков
Keyword(s):  
Measuring Equipment ◽  
Magnetic System ◽  
Technical Condition ◽  
Radius Of Curvature ◽  
Support Surface ◽  
Magnetic Devices ◽  
Ship Hulls ◽  
Mathematical Expressions ◽  
Physical And Mathematical Models ◽  
Transport Device

Оценку технического состояния корпуса судна проводят с применением диагностических датчиков. С помощью них замеряются, например, толщина обшивки, параметры бухтин, вмятин, гофрировки. Процессы эти трудоемкие и достаточно сложные. Проблемой автоматизации таких операций является удержание измерительной аппаратуры на криволинейной поверхности корпуса судна и перемещение аппаратуры по ней. Одним из вариантов решения проблемы является применение подвижных тележек с установленными на них магнитными устройствами. В данной работе исследуются вопросы влияния кривизны обшивки корпуса судна на параметры подвижной магнитной системы. Представлены расчетные схемы для различных компоновок, физические и математические модели. Анализ полученных математических выражений позволил сделать выводы по вариантам размещения, по зазору и скорости его изменения, клиренсу транспортного устройства, углу между опорной поверхностью и торцевой плоскостью магнита, который приводит к уменьшению силы притяжения. Учтен начальный зазор. Проведены расчеты зависимостей изменения радиуса кривизны корпуса судна от колеи и конструктивной схемы мобильных устройств. The assessment of the technical condition of the vessel's hull is carried out using diagnostic sensors. They are used to measure, for example, the thickness of the skin, the parameters of camber, dents, corrugations. These processes are time-consuming and quite complex. The problem of automation of such operations is the retention of measuring equipment on the curved surface of the hull of the vessel and the movement of equipment along it. One of the solutions to the problem is the use of movable trolleys with magnetic devices installed on them. In this paper, the issues of the influence of the curvature of the hull covering on the parameters of the mobile magnetic system are investigated. Calculation schemes for various layouts, physical and mathematical models are presented. The analysis of the obtained mathematical expressions allowed us to draw conclusions on the placement options, on the gap and the speed of its change, the clearance of the transport device, the angle between the support surface and the end plane of the magnet, which leads to a decrease in the force of attraction. The initial gap is taken into account. Calculations of the dependences of changes in the radius of curvature of the hull of the vessel on the track and the design scheme of mobile devices are carried out.

scholarly journals Step-by-step control of target efficiency indices of the control and measuring equipment stock applied in construction and housing and communal services

2018 ◽  
Vol 170 ◽  
pp. 01010 ◽  
Author(s):  
Rustam Khayrullin ◽  
Pavel Ivanov
Keyword(s):  
Mathematical Model ◽  
Finite Difference ◽  
Measuring Equipment ◽  
Technical Condition ◽  
Measuring Instruments ◽  
Finite Difference Equations ◽  
Target Values ◽  
The Mathematical Model ◽  
Step Control ◽  
Different Levels

The mathematical model is considered for the formation and implementation of development strategies of the stock of control and measuring instruments (CMI) applied in construction and housing and communal services(HCS), and step-by-step control of efficiency target values of the stock. The model is based on a system of finite - difference equations describing the change of number of the CMI samples with different levels of technical perfection and technical condition at each planning interval. The model allows calculating the required number of CMI for procurement and repairs in the various groups for provide target values of efficiency indices at each planning interval. Controller is number of modern CMI samples for procurement and number of modern and obsolete faulty CMI samples for the repairs. The results of calculations are presented.

scholarly journals Kertsopoulos Innovation: The Three Multi-plane Polarities and the Three Interactions and Schematic Representations in the Sense of the General Cause of the Dynamic Difference

2019 ◽  
Vol 3 (1) ◽  
Keyword(s):  
Magnetic Fields ◽  
Magnetic System ◽  
State Of The Art ◽  
Magnetic Devices ◽  
Know How ◽  
Patented Invention ◽  
Scientific Laws ◽  
First Time ◽  
Multiple Interactions

As it is known: in the state of the art, the like and the unlike polarity between two magnets remains independent of the distance between them. According to the invention: “Magnetic System of Three Interactions”, International office of patents WIPO-PCT, bearing the No WO/2013/136097of the inventor Georgios K. Kertsopoulos, the like and the unlike polarity between two magnetic constructions depends on the distance between them [1], [2], [3], [4], [5], [6], [7], [8], [9], [10]. The know-how of the invention makes it possible for interacting magnetic constructions to possess and perform interchangeable more than 96 polarities and interactions. Polarities and magnetic fields can in multiple ways interchange, depending on the varying distance between two interacting confronted magnetic constructions, offering many new variable design capabilities. For the first time, new types of poles are created, for example: simultaneous like-unlike poles or simultaneous unlike-like poles are created, causing stable or unstable balance as an interaction; also, for the first time in magnetism, new types of magnetic fields are formed never before observed, for example: remote fields of very strong attraction, without however, the contact of the magnetic constructions. The magnetic devices that perform these multiple interactions are fully patented internationally, published in a book in English, by the inventor a book in English, by the inventor [11]. The new scientific laws and principles, revealed through these experiments enrich the very basics, the foundation of magnetism, since many new types of polarities and interactions are introduced and are made possible for the first time in science and technology. In figure 1 of the article we observe the division and determination of the empty air space, between the magnetic constructions, at three distances and two boundaries which apply both for the like and the unlike front poles and in figure 2 we observe the three typical spatial distances, the three multi-plane polarities and the three interactions with properties and with spatial boundaries and interactions based on the bundles of the dynamic lines between the two magnetic constructions, on the guide, when the poles of the front poles of the arrangements are initially like. Furthermore, in figure 7 we observe a schematic representation of the three different fields (175), (177) and (178) between the above-mentioned magnetic arrangements of the constructions of the invention, with initially like front poles, in the sense of the general cause of the dynamic difference. This article is in continuation of the following published article that introduces the reader to the invention’s technology: Georgios K. Kertsopoulos (2018) Innovation article: 36 over passed restrictions of magnetism achieved by the 96 multiple magnetic polarities-interactions performed by the Kertsopoulos world patented invention vs. the known two. Advances in Nanoscience and nanotechnology [12]. https://www.opastonline.com/wp-content/uploads/2018/12/36-over-passed-restrictions-of-magnetism-achieved-by-the-96- multiple-magnetic-polarities-interactions-performed-by-the-kertsopoulos-world-ann-18.pdf?fbclid=IwAR1jYPFME5mhX2FLbKKTPAdu0YMe3FqHtoUdoRoeao8mKIp1GRuWeovEaA

About MFL Technology Application for Ship Plating Corrosion Damages Detection

NDT World ◽  
2015 ◽  
Vol 18 (3) ◽  
pp. 7-10
Author(s):  
Сясько ◽  
Vladimir Syasko
Keyword(s):  
Magnetic System ◽  
Nuisance Parameters ◽  
The Finite Element Method ◽  
Technology Application ◽  
Sensitivity Level ◽  
Residual Thickness ◽  
Physical And Mathematical Models ◽  
Thickness Measurements ◽  
Flux Leakage ◽  
System Geometry

Introduction. The article considers matters on ensuring entire nondestructive inspection of ship plating residual thickness with the use of Magnetic Flux Leakage (MFL) technique. The work aim is optimization of measuring transducers magnetic system parameters in order to guarantee the required sensitivity level at the plating thickness range of 3÷16 mm. Method. Physical and mathematical models of transducers were developed; the finite-element method was used for formulating the optimization criteria. Results. Dependences have been obtained that link tested thicknesses range and measurement error with magnetic system geometry and magnetization modes. The influence of nuisance parameters has also been studied. Conclusion. A set of measuring transducers for entire ship plating residual thickness measurements as well as techniques for adjustment and testing for pitting and planar corrosion detection have been developed as a result of this work.

scholarly journals To preparation of proposals for the target programs of development of housing and communal services

2019 ◽  
Vol 97 ◽  
pp. 02020
Author(s):  
Rustam Khayrullin
Keyword(s):  
Dynamic Systems ◽  
Measuring Equipment ◽  
Stationary Solutions ◽  
Technical Condition ◽  
Ease Of Use ◽  
Stationary Model ◽  
Control Functions ◽  
Constant Coefficients ◽  
The Mathematical Model ◽  
Different Levels

The mathematical model of the formation and implementation of strategies for the development of the park of control and measuring equipment used in construction and housing and communal services is considered. As control functions, purchases, repairs and write-offs are selected. The model is based on a linear system of ordinary differential equations with constant coefficients. The system describes the dynamics of changes in the number of control and measuring equipment samples with different levels of technical excellence and technical condition. The model mainly uses algorithms based on the properties of stationary solutions of dynamic systems. Three different strategies for the development of a measuring equipment park have been considered. For each strategy, analytical and semi-analytical solutions of the stationary model are obtained. A distinctive feature of the model is its visibility and ease of use. The results of calculations are given.

scholarly journals Improvement of warehouse hovercraft transport devices with inclined feed channels

2021 ◽  
pp. 58-66
Author(s):  
V. A. Turushin ◽  
◽  
A. M. Redko ◽  
N. V. Turushina ◽  
◽  
...  
Keyword(s):  
Operating Costs ◽  
Support Surface ◽  
Total Resistance ◽  
Problem Statement ◽  
Friction Forces ◽  
Logistics Enterprises ◽  
Storage Area ◽  
Load Location ◽  
And Storage ◽  
Transport Device

Introduction. The paper considers the question of the directions of mechanization and automation of rack warehouses logistics. The paper considers hovercraft transport devices operating in the storage area with inclined feeding channels. The displacement of the load center relative to the geometric center of the support surface is studied. It is noted how this affects the main characteristics of the studied devices. Problem Statement. Previous studies have proved the sufficient performance of non-powered hovercraft transport devices with inclined feed channels, their safety and efficiency in the transportation of piece goods, as well as the potential for mechanization and automation of transport and storage operations in rack warehouses. The task of this work is to present a scheme of mechanization for the storage area of a rack warehouse equipped with a transport device with inclined feeding channels. Theoretical Part. In rack warehouses designed for the storage of individual goods, the receiving, storing and sending operations are in most cases carried out using carrying and lifting machines. Stacker cranes are most common, but their use requires the creation of complex and expensive systems, i.e. significant capital and operating costs. The article considers the system of mechanization of a rack warehouse with the use of hovercraft vehicles with an off-center location of the cargo. In this case, the height of the airbag depends on the eccentricity of the load location. The points of application and the values of the resistance and traction forces, torques and friction forces that affect the total resistance are shown, which are typical for such a situation Conclusion. The results of the research allow us to state that in some cases, instead of traditional transport devices, the use of hovercraft transport devices with the inclined feed channels is effective in logistics enterprises.

scholarly journals Measurement and Diagnostic System for Marine Engines

2019 ◽  
Vol 49 (3) ◽  
pp. 33-48 ◽  
Author(s):  
Adam Charchalis
Keyword(s):  
Research And Development ◽  
Measuring Equipment ◽  
Diagnostic System ◽  
Technical Condition ◽  
Development Work ◽  
Maintenance And Repair ◽  
Maintenance System ◽  
Marine Engines ◽  
Marine Engineering ◽  
Ship Operation

Abstract The Scheduled Maintenance System allows ship-owners and operators to plan, carry out and document the maintenance and repair of equipment and mechanisms on board the ship at intervals in accordance with the class requirements imposed by the Classification Societies and the manufacturer of the equipment. In order to develop the research capabilities of the Faculty of Marine Engineering of Gdynia Maritime University, a Measurement and Diagnostic System has been developed to assess the technical condition of machinery and equipment in operation on board the ship. Modernization of measuring equipment, significantly expanded the research capabilities, which resulted in increasing the scope, improving quality, and speeding up the research and development work in the field of safety of operation and diagnostics of engine rooms and ship operation.

scholarly journals Assessment of the influence of diagnostic support on reliability of radio electronic systems

2021 ◽  
pp. 3-8
Author(s):  
Yevhen Ryzhov ◽  
Lev Sakovych ◽  
Sergey Glukhov ◽  
Yuriy Nastishin
Keyword(s):  
Measuring Equipment ◽  
Technical Condition ◽  
Operating Conditions ◽  
Technical Diagnostics ◽  
Electronic Systems ◽  
Metrological Reliability ◽  
Digital Information ◽  
Reliability Indicators ◽  
Static Energy ◽  
Diagnostic Software

Currently, there is a trend of digital information processing in electronic weapons systems and military equipment. Software-controlled means of communication are being implemented. This requires new approaches in diagnosing them during maintenance, which are significantly different from the process of finding defects in analog tools. Particular attention is paid to the introduction of modern advances in technical diagnostics and metrology. The possibility of using special methods for assessing the technical condition of digital devices (energy-static, energy-dynamic, electromagnetic), both separately and in combination. This slightly increases the average recovery time, but significantly affects the achievement of the required value of a comprehensive indicator of product reliability - its readiness factor. For the first time, the possibility of classifying electronic systems as "absolutely reliable" due to the peculiarities of metrological and diagnostic software is considered. The influence of controlled variables on the value of the product readiness factor is investigated. Depending on the operating conditions of the repair body, the permissible values for the qualification of specialists (average time of inspection and troubleshooting), as well as for the metrological reliability of measuring equipment are justified. According to the results of research, an algorithm for providing the necessary values of reliability indicators of products, both during their design and during operation and recovery in military conditions. It is shown that the greatest influence on the value of the reliability of products has the training of specialists of the repair body, their ability to fully use the capabilities of modern measuring equipment. The article considers the possibility of using methods for diagnosing digital electronic systems and provides an assessment of the quality of diagnostic software for the reliability of systems as a whole.

POWDER GASES MAXIMAL PRESSURE MEASUREMENT METHODS USED AT FIRING ON TESTING STAND FOR LEOPARD 2A4 TANK 120 MM GUN

2019 ◽  
Vol 149 (1) ◽  
pp. 85-98
Author(s):  
Piotr Bieniek ◽  
Janusz Weiss
Keyword(s):  
Measuring Equipment ◽  
Piezoelectric Sensor ◽  
Technical Condition ◽  
Measurement Methods ◽  
Maximum Pressure ◽  
Test Results ◽  
Factors Affecting ◽  
Testing Stand ◽  
Maximal Pressure ◽  
Accuracy Of Measurement

The paper describes a question of measuring the maximum pressure of powder gases in the barrel of 120 mm L44 Leopard 2A4 tank gun in the Institute’s testing position which, in opposite to the thank, deploys two independent methods of simultaneous measurement. The paper compares the measurement methods, the first based on placement of crushing devices directly inside the tested cartridge, and the second on deployment of a piezoelectric sensor assembled into a specially made seat in the gun’s cartridge chamber. Preparation of testing equipment and permanent monitoring of its technical condition to secure the accuracy of measurement of maximum pressure for powder gases is described. Aggregated test results of 120 mm ammunition are used to compare the deployed methods regarding (among others) the repeatability of results, reliability of the measuring equipment, and the time needed to its preparation and to the measurement at the gun site. Recommending of only one from described methods for the application may be difficult as there are many factors affecting the measurement of the maximal pressure of powder gases in the barrel bore.

scholarly journals CONSIDERATION OF THE "CONDITION-BASED" ALGORITHM OF AVIATION EQUIPMENT OPERATION WITH THE USE OF GROUND MEANS OF TECHNICAL CONTROL AND ON-BOARD MEASURING SYSTEMS IN THE STATE AVIATION OF UKRAINE

2021 ◽  
pp. 73-78
Author(s):  
О. Kuzmich ◽  
P. Arkushenko ◽  
М. Andrushko ◽  
I. Haidak ◽  
S. Pashchenko
Keyword(s):  
Measuring Equipment ◽  
Technical Condition ◽  
Technical Diagnostics ◽  
Technical Equipment ◽  
Operation Condition ◽  
Measuring Systems ◽  
Limit Values ◽  
Equipment Operation ◽  
Technical Control ◽  
Object Of Control

The article highlights the main aspects and features of the algorithm of aviation equipment operation "condition-based" with the use of ground technical means of control and on-board measuring systems and the formation of decision- making principles for further operation of aircraft. To develop methods of technical diagnostics of any technical equipment, it is necessary to identify which parameters characterize its condition and reliability as well as to establish diagnostic criteria and limit values of the controlled parameters. Depending on the nature of the parameters being controlled, there are parametric and physical methods of diagnostics. Based on the results of the diagnostics, we must get a straight answer: whether or not it is necessary to perform repairs or maintenance of the equipment being tested, taking into account the ensuring of failure-free operation before the next diagnostics. Currently, a large number of different measuring equipment that can measure signals that meet the parameters of the object of control and diagnostics are successfully used to objectively determine the technical condition of aircraft. The use of the laboratory for technical diagnostics of aviation equipment in conjunction with on-board measuring systems will provide an opportunity to make a quality technical diagnostics and reasonable conclusion to decide on further operation of the sample of aviation equipment. The use of mentioned laboratory will also predict the occurrence of failures of aviation equipment systems and units. Only a comprehensive approach to the technical diagnostics of aviation equipment with employment of all means of technical control (ground, on-board) will prevent sudden failures of aviation equipment systems.

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