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Device for automated testing of gas boiler controllers
Kuřímský, Lukáš ; Háze, Jiří (referee) ; Šteffan, Pavel (advisor)
This diploma thesis deals with the design and implementation of a computer-controlled device for testing gas boiler control units, especially in the development phase. The reason for creating a test facility is the inadequacy of older test systems and the automation of existing testing. The test device in development consists of individual different cards. Each of the cards inserted into the motherboard performs its function in the system. Each of the cards has a special functionality which simulates the real conditions of the developed product. The basis of most cards is a microcontroller with a Cortex-M core, which communicates with the connected computer using the MODBUS protocol on the RS-485 communication interface. All cards on the bus are connected in parallel and behaves as a SLAVE, while the computer behaves as a MASTER and requests data or sends commands to the cards. The cards represent status switches (switching sensors), resistance and analog temperature sensors, PWM inputs and outputs (for simulation of feedback pumps or flow meters with pulse output). The cards also include a flame simulator, which reliably simulates the electrical properties of the flame and at the same time acts as a fan simulator. The input of the control unit is taken care of by the input card, which is intended for digital detection of the voltage presence in the range of 5 to 230 V DC and AC. Simultaneously, a card for connecting the power supply at zero voltage and disconnecting at zero current is created to supply the tested device with alternating voltage. A schematic diagram was designed or simulated for each card, then the function was verified and on this basis the whole card was created, including the microcontroller firmware. The most suitable solution and function of each card is carefully described and evaluated. All the requirements of the assignment within the work were met and the whole test equipment was manufactured and verified in four versions. In the future, the device is ready for the implementation of an automatic flame simulator and other improvements of individual module cards.
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Mechanical design of impact simulator under reduced gravity
Melichar, Marek ; Pokorný, Jan (referee) ; Návrat, Tomáš (advisor)
The diploma thesis is focused on the development of the concept of a mechanical device that would meet the necessary requirements to achieve a successful simulation of reduced gravity or microgravity on the tested body at its impact. The choice of a suitable mechanism is based on a literary research of all available variants and highlight of their specifics. Target values are created for the selected method of testing, upon reaching which the concept will be considered successful. In order to verify the functionality of the concept, a mechanism is assembled on a smaller scale. The individual components of the mechanism are tested and carefully selected. All essential physical processes taking place in the system are mathematically described and combined into a MATLAB script. A separate application is created to calculate the behavior of the system based on the specified input parameters.
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Design of pneumatic cylinder testing equipment
Macek, Tomáš ; Pavlík, Jan (referee) ; Tůma, Zdeněk (advisor)
This diploma thesis deals with the design of test equipment for selected types of pneumatic cylinders. In the first, theoretical, part of the work is an analysis of the current state of knowledge in the field of pneumatic cylinders. Furthermore, the problems in the field of measurement and testing of pneumatic components are described here, selected linear position sensors are also described herein too. The second, practical, part deals with the choice of a suitable design variant and the actual solution of the test equipment design. A pneumatic circuit is also designed here. Part of the work is a 3D model of the test equipment and drawing documentation. The conclusion of the work is devoted to the overall evaluation of the work and recommendations for practice.
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Design of low volume inlet tester
Hotový, Michal ; Huzlík, Rostislav (referee) ; Knoflíček, Radek (advisor)
The topic of this thesis is the design of a testing device for checking electrical car sockets according customers’ requirements. The electrical socket shall be tested by electrical, mechanical and camera tests. The diploma thesis is divided into two main parts, first is a part describing the basic elements in the construction of electric vehicles, and describing types of electric sockets in electric vehicles, and second, a practical part describing the design of a testing device.
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Testing equipment for function test of automatic standby unit
Dušek, Pavel ; Pásek, Jan (referee) ; Štohl, Radek (advisor)
This bachelor’s thesis is focused on the description of automatic transfer switch and designing a tester for automatic transfer switch MODI ZA made by OEZ s.r.o. The solution itself consists of creating the state diagrams of the function test steps, programming software for Simatic S7-1S200 PLC and Simatic KTP 400 control panel and creating a technical documentation containing the tester wiring diagram, and layout of the insides of the switchboard. It also contains the diagram explaining how to connect the automatic transfer switch MODI ZA to the tester.
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Design of the test facility
Pavluš, Martin ; Pavlík, Jan (referee) ; Tůma, Zdeněk (advisor)
The thesis deals with the design of automated testing equipment of selected types of pneumatic valves. The problem of manual control process is its inefficiency, both in terms of human error rate and time loss caused by further assembly. The automated manual inspection process eliminates the problem. In the theoretical part, the types of switchgear are described, selected measuring procedures and methods of measurement are described. In the practical part, the measuring procedure was set out and on the basis of it there were designed variants of the testing machine and test circuit. The conclusion of the thesis contains evaluation of the whole project.
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Universal Tester of Radio Conditions for Narrowband IoT Communication Technology
Možný, Radek ; Štůsek, Martin (referee) ; Mašek, Pavel (advisor)
Technology Narrowband IoT is a representative LPWA (Low Power Wide Area) tech-nology that due to its promising features aims for demands of the Internet of Thingsapplications for autonomous data sending from sensors in areas of poor mobile coverage.For such applications, it is beneficial to firstly map properties of communication technol-ogy in areas of intended use and evaluate whether or not is this technology applicable.This Master thesis deals with the design of the hand-held measuring device for evaluationof Narrowband IoT properties. The output of this thesis is firstly comparison of LPWAtechnologies secondly, design of the mentioned device and verification of its functional-ity. And in last part description of measurement of transmission delay for delay-tolerantapplications. Transmission delay is a critical parameter for delay-tolerant applications.Such an application can be, for example, smart electrometers for which there is definedmaximal allowed transmission delay of 10 seconds and therefore it is desirable to evalu-ate whether or not is the deployment of the communication technology Narrowband IoTsuitable in the intended area for delay-tolerant or even for delay-intolerant applications.
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Test Equipment for Solder Joint Strength Measuring
Čechák, Ondřej ; Špinka, Jiří (referee) ; Starý, Jiří (advisor)
This master thesis introduces the problematics of the tensile strength of soldered joints and the correlative mathematical formulas and the use of mentioned problematics in the technology of die shear/pull machines designed for the solder joint tensile strength measurement. It explains the importance and reasons for the use of this technology. The emphasis is then laid on the design and construction innovations of the current laboratory manual shear/pull measuring machine, its semi-automation and the possibility of utilizing the innovated system in a laboratory class of a subject on FEEC BUT.
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Design of a test rig for a wear test of inner ball joints
Blecha, Martin ; Pavlík, Jan (referee) ; Knoflíček, Radek (advisor)
This diploma thesis deals with the design of several variants of test rig for tests of axial ball joints of passenger cars. The individual design variants are evaluated based on the evaluation matrix and then the best option is selected. Selected proposal includes a complete design including 3D models and strength analyses that focus on the most stressed construction nodes. These design nodes are solved using the finite element method. Hydraulics and hydraulic elements are equipped by the existing equipment from a test lab. At the end of this thesis is solved risk analysis of the new construction and its economic evaluation.
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Semi-solid alloys testing device
Valíček, Václav ; Bastl, Michal (referee) ; Chalupa, Jan (advisor)
This thesis deals with design of semi-sollid alloy testing device. In the beginning, there are briefly introduced possibilities of semi-solid alloy exporation followed by analysis of temperature measurement options, torque measurement options and control of the thermal system. There was build development version of construction and electronics based on results of analysis. The outcomes of this thesis are: design of printed circuit board based on electronics prototype connection, production of mechanical parts for device and realization of user interface in form of touch screen.
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