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Monitoring system design for aquaponics farm
Mikuš, Tomáš ; Bednařík, Josef (referee) ; Věchet, Stanislav (advisor)
The aim of this bachelor thesis is the design and implementation of an online monitoring system for an aquaponic farm. The system will be able to measure water temperature in tanks, air temperature and humidity, pH of water and water level in tanks. All measured data will be accessible online. The system will also be able to control a fan and water pumps.
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Simulation and modeling of free body dynamic inside sea drifter
Moravec, Jakub ; Věchet, Stanislav (referee) ; Hadaš, Zdeněk (advisor)
This thesis deals with the development of a simulation model of an energy harvester based on the electromagnetic resonator principle. The introduction focuses on a search of the devices created so far for the conversion of kinetic energy of the sea into electrical energy. Furthermore, a model of the resonator design tuned to a frequency of 1.6 Hz is created in the body dynamics program MSC Adams. Simulations are performed in this program to analyze the resonator properties. Finally, the model is tested by real sea excitation. From these simulations, the electrical power obtained by this device is then predicted. Under regular sea excitation, the harvester power reached instantaneous peak values of 5 W and in case of irregular sea excitation the peak power values reached up to 16 mW.
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Design of Resonance Mechanism for Rolling Mass Energy Harvester
Kvaššay, Miroslav ; Věchet, Stanislav (referee) ; Hadaš, Zdeněk (advisor)
A significantly important part in sea monitoring is to find the right choice of electric generator to power sensors in ocean buoys. This Bachelor’s thesis introduces a design of resonance mechanism for rolling mass energy harvester running on very low excitation frequencies, which are present in a marine environment. Firstly, there is research about energy harvesters based on planar motion, from which a prototype of resonance mechanism has been designed, based on a proof of mass, rolling in an internal gear. Second, after a proper analysis of proposed mechanism, a final resonance mechanism design for a rolling mass energy harvester has been made, with a natural frequency of 0,84 Hz. This mechanism can be adjusted by changing the gear or steel tube parameters to fit different objectives. Third, a physical prototype realization of the proposed mechanism was generated and successfully tested on a robot arm. To generate an electricity the energy harvester utilizes electromagnetic induction, which was tested on two pairs of coils. The prototype produced on average 1,81 mW of power undergoing harmonic excitations with an amplitude of ±20° around the Z axis at resonance frequency in serial wired coils with 332 resistance. The conclusion of the experimental measurements suggests that a proposed energy harvester is suitable for self-powered ocean buoys and can generate more electricity when a coil is fully optimized.
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Response analysis of train track laboratory model
Heteš, Marek ; Věchet, Stanislav (referee) ; Kšica, Filip (advisor)
In terms of safety, railway tracks have to be kept in good condition. Early and accurate detection of track defects can save both time and money. This thesis deals with simulation of a passing train on laboratory apparatus, and the measurement of the generated response. Apparatus represents scaled down section of a railway track, and allows the simulation of defect formation. With the help of the obtained data, a suitable method for defect detection was created.
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Smart greenhouse control system design
Šindelář, Jiří ; Králík, Jan (referee) ; Věchet, Stanislav (advisor)
This thesis deals with the design of an embedded control system for a smart greenhouse based on commonly available microcontrollers, enabling the automation of greenhouse operation while maintaining minimal costs. The conceptual greenhouse solution includes equipment for process automation, a web application for monitoring current status and statistics, as well as the necessary controls for manual remote control of the actuators. Furthermore, the proposed system supports connection to a parent server which allows remote monitoring and control.
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Autonomous mobile robot motion planning strategy design
Doseděl, Miroslav ; Králík, Jan (referee) ; Věchet, Stanislav (advisor)
This work is concerned with planning the movement of the robot in space and near plants. The main goal is to realize the movement of a robot designed for operation in indoor areas of buildings for watering indoor plants. In the first part of the thesis, existing algorithms for motion planning and obstacle avoidance are presented. In the next part, a search dealing with Framework ROS is written. The individual movements performed by the robot are then described and testing on the real robot is carried out at the end.
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Autonomous mobile robot communication interface design
Bajer, Jan ; Šnajder, Jan (referee) ; Věchet, Stanislav (advisor)
This thesis deals with the design and implementation of a communication interface for an autonomous mobile robot, which is designed for watering plants. The theoretical part is a search for possible ways of communication with the ROS system, which runs on the robot. Subsequently, the possibilities of designing a mobile application for interaction with this robot are explored. In the practical part, a communication interface is designed using the MQTT protocol together with the implementation of this interface into a robot, database server and mobile application, which is created using the Flutter framework. The conclusion of the work discusses the suitability of the communication protocol used and the evaluation of the functionality of the created system.
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Object clasification based on its topology change using image processing
Zbavitel, Tomáš ; Věchet, Stanislav (referee) ; Krejsa, Jiří (advisor)
The aim of the present work is to select a suitable object classification method for the recognition of one-handed finger alphabet characters. For this purpose, a sufficiently robust dataset has been created and is included in this work. The creation of the dataset is necessary for training the convolutional neural network. Further more, a suitable topology for data classification was found. The whole work is implemented using Python and the open-source library Keras was used.
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Autonomous vehicles sensors - study search
Macejka, Kamil ; Krejsa, Jiří (referee) ; Věchet, Stanislav (advisor)
This bachelor’s thesis is aimed at current trends and hardware solutions in the field of autonomous vehicles (AVs). Firstly, the definition of AV is presented and levels of autonomy are listed according to several criteria. This is followed by a brief overview of the early stages and historical development of AVs and by an introduction of sensors needed for their operation. The following part focuses on AVs created at DARPA Grand Challenge competition, which inspire even present-day companies. Next chapter describes leading companies in the area AV development, their approach to sensor selection and placement and their main goals. Furthermore, possible real applications of AVs and current pilot projects are presented. In the last part, results of this research are used to design a custom experimental AV.
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