The paper considers the principle of constructing a gravitational transport system designed for container transportation of the technological materials. It proposes a scheme of the transport system providing the container shuttle motion between the stations. A scheme is developed, and description of the stations operation principle is presented being a part of the transport system; the compressed air energy is used there to provide transport container with the potential energy ensuring its motion along the transport route under the gravity influence. The proposed station scheme makes it possible to consider the station as a functionally complete module forming the basis for possible development of the extended transport systems with various configurations. An algorithm for the station functioning was developed that implemented the processes of sending and receiving a container. A microprocessor system for managing the station mechanisms is proposed, which controls the sensor signals state and generates control signals for the compressed air distributors. A computer model of the control system was designed and developed to debug algorithms for controlling the transport system stations. The considered schemes and algorithm are intended to develop the technological transport lines.
В статье описан способ использования электролюминесцентных панелей не только в виде источника света, но и в виде датчика оптического и нейтронного излучения. Рассмотрен фотодиэлектрический эффект в электролюминесцентных панелях. Получены осциллограммы напряжения и тока электролюминесцентной панели, зависимости величины электрической емкости от уровня внешней освещенности. Изображена структурная схема системы для управления электролюминесцентной панелью.
The possibility of using electroluminescent panels as sensors for optical radiation is considered. The presence of a photodielectric effect was noted in them. Oscillograms of the current and voltage of the electroluminescent panel are shown. The dependences of the electric capacity of electroluminescent panels on the level of external illumination are obtained. A block diagram of a system designed to control an electroluminescent panel as a radiation sensor has been developed.
Автоматическое управление любым технологическим процессом предусматривает непрерывный или периодический контроль параметров, определяющих данный технологический процесс. Для горных, обогатительных, металлургических заводов и фабрик таким параметром является химический состав исходного сырья, флюсов, используемых реагентов, промежуточных продуктов, готовой продукции, отвальных хвостов и сбрасываемых сточных вод. Информацию о химическом составе этих продуктов получают путем отбора и последующего анализа представительных проб. Целью данной работы является разработка системы контейнерной доставки технологических материалов, основанной на применении унифицированных узлов, функционирующих под управлением универсальной микропроцессорной системы. Решение поставленной задачи позволяет упростить процесс адаптации системы к конкретному технологическому процессу, повысить ее надежность за счет применения унифицированных узлов и упростить обслуживание в процессе эксплуатации. Разработана схема системы контейнерной доставки технологических материалов, в состав которой входят станции, обслуживающие процесс транспортировки контейнера. Станции выполнены на основе унифицированных узлов и элементов. К таким узлам станций относятся: пневмоцилиндры, электропневматические клапана, распределители, магнитные датчики. Эти узлы и элементы предназначены для перемещения транспортного контейнера как внутри станций, так и по транспортному трубопроводу. Управление узлами станций системы осуществляется с помощью микропроцессорной системы управления. В статье проведена оптимизация сигналов управления, формируемых как внутри станций, так и поступающих от вспомогательных устройств транспортной системы. Сигналы управления позволяют реализовать оптимальные алгоритмы функционирования системы. Разработаны алгоритмы реализующие различные режимы функционирования станций. Разработана принципиальная схема микропроцессорной системы управления на основе современной элементной базы. Разработанная система управления отличается универсальностью, легко адаптируется для выполнения различных режимов работы станций, это позволяет расширять функциональные возможности системы.Automatic control of any technological process provides for continuous or periodic monitoring of the parameters that determine this technological process. For mining, processing, metallurgical plants and factories, such a parameter is the chemical composition of the feedstock, fluxes, reagents used, intermediate products, finished products, dump tailings and discharged wastewater. Information about the chemical composition of these products is obtained by selecting and then analyzing representative samples. The purpose of this work is to develop a container delivery system for technological materials based on the use of unified nodes operating under the control of a universal microprocessor system. The solution of this task makes it possible to simplify the process of adapting the system to a specific technological process, increase its reliability through the use of unified nodes and simplify maintenance during operation. The scheme of the container delivery system of technological materials, which includes stations serving the process of container transportation, has been developed. The stations are made on the basis of unified nodes and elements. Such nodes of the stations include: pneumatic cylinders, electropneumatic valves, distributors, magnetic sensors.
Автоматическое управление любым технологическим процессом предусматривает непрерывный или периодический контроль параметров, определяющих данный технологический процесс. Для горных, обогатительных, металлургических заводов и фабрик таким параметром является химический состав исходного сырья, флюсов, используемых реагентов, промежуточных продуктов, готовой продукции, отвальных хвостов и сбрасываемых сточных вод. Информацию о химическом составе этих продуктов получают путем отбора и последующего анализа представительных проб. Целью данной работы является разработка системы контейнерной доставки технологических материалов, основанной на применении унифицированных узлов, функционирующих под управлением универсальной микропроцессорной системы. Решение поставленной задачи позволяет упростить процесс адаптации системы к конкретному технологическому процессу, повысить ее надежность за счет применения унифицированных узлов и упростить обслуживание в процессе эксплуатации. Разработана схема системы контейнерной доставки технологических материалов, в состав которой входят станции, обслуживающие процесс транспортировки контейнера. Станции выполнены на основе унифицированных узлов и элементов. К таким узлам станций относятся: пневмоцилиндры, электропневматические клапана, распределители, магнитные датчики. Эти узлы и элементы предназначены для перемещения транспортного контейнера как внутри станций, так и по транспортному трубопроводу. Управление узлами станций системы осуществляется с помощью микропроцессорной системы управления. В статье проведена оптимизация сигналов управления, формируемых как внутри станций, так и поступающих от вспомогательных устройств транспортной системы. Сигналы управления позволяют реализовать оптимальные алгоритмы функционирования системы. Разработаны алгоритмы реализующие различные режимы функционирования станций. Разработана принципиальная схема микропроцессорной системы управления на основе современной элементной базы. Разработанная система управления отличается универсальностью, легко адаптируется для выполнения различных режимов работы станций, это позволяет расширять функциональные возможности системы.
This paper proposes a new approach to the construction of control models of complex technological processes consisting of sub-processes (operations) presented in the form of models described in terms of differential structural modified Petri networks. Method implementation procedures are defined and implementation algorithm is described. Two types of composition are presented when implementing this construction approach: serial and parallel. This approach is recommended when obtaining a single control model by a complex technological process, if the operations implementing it are presented in terms of one mathematical apparatus, but in various modifications thereof. The Cartesian product of graphs modified under Petri nets taking into account their different structure and requirements to composition types is the basis for the offered approach. The offered approach - a composition method the multistructural of the modified Petri nets, provides increase in extent of synchronization of the technological operations making difficult technological process. The received managing models with use of the presented approach provide required extent of synchronization at the smallest labor costs, the conversions caused by need the multistructural of the models making difficult technological process of operations to models of identical structure. The offered algorithm is illustrated on a specific example.
The results of studies on the formation of a crystalline phase in the matrix of foam glass as well as the influence of this phase on the performance of a material (strength in compression, density, and others) are presented. The particularities of the technological process of foam-glass synthesis taking account of crystallization are shown. It is found that an amorphous-crystalline frame (crystalline-phase content to 20%) where crystalline inclusions of definite size (35 – 50 nm) play a reinforcing role is necessary in order to increase the strength of the foam glass.
The possibility of designing an electronic device for protection and diagnostics of electric drives with improved characteristics is considered. The technique and algorithm of design of similar devices, the structural scheme of the device constructed on their basis are offered. To improve the characteristics of the device of protection and diagnostics of electric drives in the work it is proposed to provide for the use of measuring transducers with linear dependencies of the output values on the controlled ones. The latter is possible as a result of the use of measuring circuits in measuring transducers with linearized dependencies of the output values on the input and the use of intelligent sensors. As a measuring circuit for the construction of measuring transducers is considered the measuring circuit of Kenigsberg, which is characterized by a linear dependence of the output active value of the passive measured (controlled physical quantities). At the same time, the intelligent sensors are additionally assigned the function of linearization of the output dependence of a «simple» sensor on the controlled physical quantity.
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The paper presents a review of the core components of the container delivery system in technological products, covering the control signals necessary for the operation of the pneumatic transport system. The functional scheme of the pneumatic container delivery system has been developed, and the number of control signals has been optimized. A schematic diagram of the pneumatic transport control system was developed and a computer based simulation was performed.
Automatic process control presupposes periodic control to determine the parameter process. For concentrators and metallurgy plans, the parameter to control is the composition of raw materials, fluxes, reagents, intermediate and finished products, tailings, and effluents. Data on their chemical composition is retrieved by sampling and analyzing representative samples. The paper discusses the optimization of controlling the robotics in a pneumatic conveying system by means of computer simulation. We have developed the structural diagram of a pneumatic conveying system based on using a versatile robotic station. The paper presents the functional diagram and the developed functional algorithm of such a station designed for building pneumatic systems for conveying technological materials in containers. We have developed the schematic diagram and software for the microprocessor station control system. The conveying of containers with technological materials is done by a system consisting of standardized stations. The stations consist of standardized and interchangeable units. The stations are controlled by a universal control system.
In this paper we suggest a new approach to the construction of control models of technological processes, the necessary and sufficient condition for the direct conversion of activity transitions graphs (ATG) in the network of technological processes (TP), and direct conversion rules. The forbidden figure of ATG direct conversion in the TP network is determined. ATG conversion procedures in TP networks with the forbidden figure are proposed. The proposed rules and procedures are illustrated graphically. The term of “complex” transition is introduced and the structure of new modified Petri nets is developed.
The work identifies the problem of comparing the analysis results of automated power metering system data produced by using a variety of mathematical, statistical and intelligent methods. Today, operators of such systems analyzing the charts of energy consumption independently decide on inspection of electrical power facilities. With the proliferation of such systems in the household sector, this approach is becoming ineffective. The solution to this problem is in implementation of decision support systems in energy retail companies. The authors have developed the structure of decision support system that enables analyzing the data and comparing the analysis results obtained with different methods, as well as generating recommendations for an operator of power metering systems. The paper describes the subsystems, blocks and modules of the system, their purpose, function and operation algorithms, as well as the relationships and ways of interaction of different system modules. Based on the proposed structure, the software specification can be compiled.
An apparatus for determining the wettability of quartz sand was developed. It was shown that as the temperature increases, the surface wettability of the minerals present in the glass quartz sand increases owing to a reduction of the slippage of the liquid along the solid surface and, in consequence, the aggregative stability of their suspensions increases.
It was determined that after removing metal using the method of flow aerosol flotation for the old tailings of the tungsten-molybdenum factory and adding limestone, the mixture is similar to the clinker used in the production of the Portland cement.It was experimentally shown that dumping cakes in the hydrometallurgical production may be divided into a secondary raw tungsten-molybdenum complex and a non-metallic part, which when added to the heavy concrete at a ratio of 20-30% of the amount of cement do not reduce the strength of the concrete samples, actually, a slight increase in strength upon compression is observed.Non-metallic parts may be used as a mineral additive in cement production. The cost of mineral additives is similar to 9.5% of the total costs on raw materials and 2.4% of the direct expenses. The production cost of 1 ton of cement with mineral additives was 1757.09 rubles for a selling price of 3964.36 rubles. The factory price of this cement was 3680-4200 rubles, which provides a positive commercial result.The paper comprises the technical and economic study on the feasibility of utilizing the material according to the developed economic models of waste recycling of lead-zinc ore in the production of construction materials. The recipe was concocted. (C) 2016 Published by Elsevier Ltd.
Innovative ways and hindrance to the metallurgical industry development of Russia are identified in the article. The authors lighted the emergency situations dependence on the human and technological factors. Three-level organizational structure of the automated management and control system of production of metallurgical enterprises is described in the article. The necessity in additional smart information systems for the metallurgical enterprise automated control system to warn emergency situations is substantiated by the authors. The interplay structure of Automated Control Systems, Emergency Warning Systems and computer information management systems for the metallurgical enterprises is demonstrated in the paper. Functionality of the system and the role of its components in the Emergency Warning System (EWS) are defined in the paper. The final analysis of the research shows the way of preventing emergency situations efficiency confirmed by the positive results of the experimental studies at the joint-stock company “Electrozinc” (Vladikavkaz city).
It is proposed that modified Petri nets, describing the operations comprising the technological process of glass-batch preparation, be used as control models of the technological process in order to maintain efficient control of glass-batch preparation in accord with the prescribed technical regulations by means of synchroneity and harmony of the functioning of the technological equipment.
The concept of equivalence theory Petri''s networks based on equality languages of networks, is very bulky for its practical embodiment at the solution of the minimization networks problem [1, p. 148]. In the real work the method of minimization the modified Petri''s networks based on concept of conditional and equivalent positions and transitions is offered.