Pulled plug-flow model for 4th generation district heating

The controlling of modern district heating systems requires accurate models and simulation tools. The description and necessary verification of a model that sets these ambitions is a matter of this contribution. The model comes out of the known method-plug flow modelling. The implemented model works on the pulling principle when the amount of heat from the producer is "pulled" by the customer. The model was implemented and verified on the date of the local operator of the heating plant and distribution network. The model has been set to the parameters of the part of a real DH network, and its accuracy has been tested about traffic delays and heat loss in the pipelines. For the present experiment, the full knowledge of the heat demand was considered. These were optimal conditions and perhaps not just because of it the result that the pull plug flow model achieved was a quite good matching the measured and calculated values. (C) 2019, IFAC (International Federation of Automatic Control) Hosting by Elsevier Ltd. All rights reserved.Technology Agency of the Czech Republic [TH02020979

Základní jednotka pro ovládání výroby bionafty

This work describes the control of biodiesel production from renewable and waste raw materials. Biodiesel for internal combustion engines are currently produced and used with all its advantages (reducing CO2, produced from renewable materials) and disadvantages (higher nitrogen oxide emissions). For production of biodiesel was implemented and deployed controlling system based on programmable logic controller Saia. Programmable logic controllers are widely used and deployed from the smallest to the largest manufacturing processes in industry. The control system maintains the required parameters of a chemical reaction, in which biodiesel is created from renewable or waste raw materials.V článku je popsáno řízení výroby bionafty z obnovitelných zdrojů a z odpadních surovin. Bionafta pro spalovací motory je v současné době vyráběna a používána se všemi jejími výhodami (snižování emisí CO2, výroba z obnovitelných zdrojů) a nevýhodami (zvýšení emisí oxidů dusíku). Pro výrobu bionafty byl vyvinut a nasazen kontrolní řídicí systém založený na programovatelném automatu Saia. Programovatelné automaty jsou široce používány a nasazovány v průmyslových výrobních procesech, a to jak v těch nejmenších, tak i ve velmi komplexních zařízeních. Popisovaný řídicí systém udržuje požadované parametry chemické reakce, při které je bionafta vyráběna z obnovitelných zdrojů nebo odpadních surovin

Design of Universal Interface between ERP (Enterprise Resource Planning) and WMS (Warehouse Management System)

Import 22/07/2015Tato diplomová práce se zabývá návrhem rozhraní mezi informačními systémy ERP a WMS. Cílem práce je navrhnout integrační aplikaci zajišťující komunikaci a přenos dat mezi systémy ERP a WMS. První část této práce představuje podnikové informační systémy ERP a systémy pro řízení skladů WMS. Druhá část práce popisuje vlastnosti integrace dat, strukturu middleware a existující řešení poskytující integraci dat mezi systémy. Třetí část této práce se věnuje analýze skladových operací a jejich průběhu, které jsou společné pro systémy ERP a WMS. V této části je také naznačena komunikace mezi integrovanými systémy. Poslední část této diplomové práce se zabývá samotným návrhem a implementací integrační aplikace. Popisuje použité technologie, návrh tříd a vyřízení požadavku skladové operace.This master thesis describes the design of the interface between ERP and WMS information systems. The aim is to design an integration application providing communication and data transfer between ERP and WMS. The first part presents ERP enterprise information systems and WMS storage systems. The second part describes the characteristics of data integration, middleware structure and existing solutions providing data integration between systems. The third part of this thesis provides an analysis of warehouse operations and their workflow, which are common for ERP and WMS. In this section is also indicated communication between integrated systems. The last part of this thesis deals with the design and implementation of integration application. It describes the technology, design and processing of requirement operations from warehouse.460 - Katedra informatikyvelmi dobř

Modelování dvou fazí rafinace živočišného tuku

This work describes the mathematical model of both phases of the refining process of animal fat – the phase of heating and the phase of melting. In order to prepare biodiesel using animal fat, it is necessary to heat the solid fat to the melting point, and then melt it until the whole fat becomes liquid. Points of interest are the temperature of fat depending on time during heating and the amount of changing the dimension of the fat portion during the melting subprocess. The first described model is valid only until the temperature of fat reaches the melting point. Afterwards, the second phase of refining process starts and it is modeled differently.Tato práce popisuje matematický model obou fází rafinace živočišného tuku – fázi ohřívání a fázi tání. Abychom mohli připravit biodiesel s použitím živočišného tuku, je nutné zahřát pevný tuk do bodu tání, a poté ho rozpouštět tak dlouho, dokud celý nezkapalní. Významnými body jsou jednak teplota tuku závisející na době ohřevu a množství střídání jeho objemu během tání. První popsaný model je platný pouze v případě, kdy teplota tuku dosáhne bodu tání. Poté nastává druhá fáze rafinace a ta se formuje různě

Remarks on historical brewing in selected villages in the Chomutov region of the Ore Mountains

The paper concerns the brewing industry in selected towns and villages in the mountainous area of the Chomutov region and is based on written and archival sources. It presents information about beer-brewing privileges in baileys and inn courtyards in the relevant localities with the addition of original citations from archival sources relating to the issue in question in the oldest versions of the privileges. The paper furthermore presents the most important historic circumstances that determined the aforementioned area in the matter of brewing and attempts, on the basis of selected examples of the baileys of Křimov and Volyně, to capture the period significance of the said rights as well as a more detailed example of the development of the scope of these privileges up to the 18th century

Modular control system for embedded applications

This paper deals with hardware design of a modular control system intended for embedded applications demanding high computational power while maintaining low cost. The control system central unit is based on 32bit microcontroller MK60DN512 with ARM Cortex-M4 core manufactured by NXP Semiconductor. Module provides all the necessary signals on the two 2-row 40 pin headers and Ethernet communication interface in the form of a small daughter board. It is connected to the mainboard which must always contain 5 V stabilized power supply; other circuits are application specific. In our application the mainboard is equipped with SD card slot, RS232 and RS485 interface which is used for high speed interconnection with up to 15 expansion peripheral modules. This concept enables high flexibility to specific application demands without necessity of redesigning the control system. Controller is freely programmable in C language using any compatible integrated development environment NXP Kinetis Design Studio, for example. Software development and debugging is simplified by our support program libraries including necessary routines for control and monitoring tasks.Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [LO01303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089

Design of active feedback for rehabilitation device

Sensor systems are an essential part of automated equipment. They are even more important in machines that come in contact with people, because they have a significant impact on safety. This paper describes the design of active feedback for rehabilitation device driven by pneumatic artificial muscles. Here are presented three methods for measuring the load of the robot. The first is a system composed of Force Sensitive Resistors (FSR) placed in the handle of the device. Two other methods are intended to measure the load of the actuator composed of artificial muscles. The principle of one method is to measure the difference in filling pressures of the muscles, second is based on strain measurement in the drive cables. The paper describes advantages and disadvantages of using each of these methods in a rehabilitation deviceEU; Operational Programme Research and Development; Measure 2.2 Transfer of knowledge and technology from research and development into practice; Research and development of intelligent nonconventional actuators based on artificial muscles", ITMS [26220220103]; Slovak Grant Agency VEGA [1/0911/14]; Ministry of Education, Youth and Sports of the Czech Republic within the National Sustainability Programme [L01303 (MSMT7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03.0089

Takahashi controller with continuous identification in fast response application

The paper describes Takahashi controller with an adaptive system identification in a fast response application and describes hardware design with an 8-bit microcontroller. Takahashi controller is modified PSD controller and due to simple calculation of controller's parameters it can be implemented into the 8-bit microcontroller. The microcontroller was selected from Freescale semiconductor, specifically MC9S08DZ60 which has maximum allowed frequency 40MHz. The identification is based on the least squared recursive method in the beginning of the control process and during the operation at the moment when user changes systems parameters. These are given by the application of the fast response temperature control of soldering tips which are changeable during soldering process. In the first part of the paper the controller is described and in the second part practical aspects of hardware design, such as low power consumption, method how to measure temperature by thermocouple which shares wires with heater and design of AD converter are described

Advanced debugger for Arduino

This article describes improved version of our source-level debugger for Arduino. The debugger can be used to debug Arduino programs using GNU debugger GDB with Eclipse or Visual Studio Code as the visual front-end. It supports all the functionally expected from a debugger such as stepping through the code, setting breakpoints, or viewing and modifying variables. These features are otherwise not available for the popular AVR-based Arduino boards without an external debug probe and modification of the board. With the presented debugger it is only needed to add a program library to the user program and optionally replace the bootloader. The debugger can speed up program development and make the Arduino platform even more usable as a tool for controlling various experimental apparatus or teaching computer programming. The article focuses on the new features and improvements we made in the debugger since its introduction in 2016. The most important improvement over the old version is the support for inserting breakpoints into program memory which allows debugging without affecting the speed of the debugged program and inserting breakpoints into interrupt service routines. Further enhancements include loading the program via the debugger and newly added support for Arduino Mega boards. © 2021. All Rights Reserved.Ministry of Education, Youth and Sports of the Czech RepublicMinistry of Education, Youth & Sports - Czech Republic [LO1303 (MSMT-7778/2014)]; European Regional Development Fund under the project CEBIA-Tech [CZ.1.05/2.1.00/03 xxx]Ministerstvo Školství, Mládeže a Tělovýchovy, MŠMT: LO1303, MSMT-7778/2014; European Regional Development Fund, FEDER: CZ.1.05/2.1.00/0

Microcontroller software library for process control

This paper deals with library of program modules for process control applications running on microcontrollers. The aim of the library is to make it easier to create control applications for microcontrollers. It should allow creating such applications by putting together existing program modules provided in the library with little new code required. The software is written in C language and works with Freescale HCS08 8-bit microcontrollers and the Kinetis series 32-bit ARM-based microcontrollers. It should also be easy to port the code to other platforms. © 2015 World Scientific and Engineering Academy and Society. All rights reserved