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Low power module with thermocamera
Horák, Daniel ; Najman, Jan (referee) ; Chalupa, Jan (advisor)
This bachelor thesis is focused on contactless temperature measuring with given thermographic camera and lossless image compression obtained by this camera. The theoretical part describes principles for better understanding of the issue and the practical part contains the solution itself, prepared for above mentioned thermographic camera.
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Testing parameters of stepper motors at different microstepping mode
Műller, Jakub ; Chalupa, Jan (referee) ; Klimeš, David (advisor)
This thesis deals with design and construction of test equipment that allows measurements of basic parameters of stepper motors. The first part is devoted to the search about the principle of operation of the hybrid stepper motor. For the analysis engine has been used a mathematical simulation model with real parameters in Matlab/Simulink. The next section is the design of mechanical and electronic form of the test facility with a description of the components used. The last part of this work is focused on measuring the excitation currents and measuring loss of steps at various control modes and microstepping.
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Automatic exposure unit for PCB production
Blahút, Jozef ; Spáčil, Tomáš (referee) ; Chalupa, Jan (advisor)
This diploma thesis deals with the issue of fast high-quality prototype production of printed circuit boards for the needs of the mechatronics lab. Within the scope of this thesis a prototype machine was proposed and created together with control software, which by the help of DLP projector and two stage axis allows to produce printed circuit board in relatively short period of time.
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Design and realization of the measuring amplifier of mechanical quantities
Kaplan, Tomáš ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
Subject of this effort is development and realization of one-channel data acquisition unit of mechanical quantities and it’s PC software application. Usage of this data acquisition unit is aimed on applications, where resistive strain gages wired as Wheatstone bridge with AC excitation are used. Output voltage of Wheatstone bridge is amplięed, demodulated with excitation voltage, filtered and level shifted for analog to digital conversion via AD converter. Converted digital data are sent via serial bus into microprocessor which sends them into PC for further meaningful representation in software application. Besides sensing bridge output voltage, data acquisition unit also generates AC excitation of Wheatstone bridge. This excitation voltage is generated via DA converter which communicates with microprocessor and converts incoming digital data into analog sine waveform. There is precise voltage reference circuitry for both of these converters. PC application’s task is to visualize measured data in meaningful form and to give tools for further work with measured data. It’s programmed in Python language and it has one independent thread which does reading and computing of incoming data and there is also class which builds graphical user interface and plots measured data into live graph.
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Swimming pool water quality monitoring system
Čada, David ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
The goal of my bachelor thesis is to design, create and test a system for sensing the quality of pool water, in conditions close to the real usage. The main purpose of the system is to evaluate acidity of pool water using pH probe, then to send data to the end user through a web application. Frequently measured acidity should lead to keep the optimal pool water quality (together with the user’s interventions). Thesis also includes research of commercial products used for pH measurement as well as different ways to measure water pH. The entire measuring system is realized on ESP32 platform and is powered by solar panel with battery as a buffer – system is standalone.
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Design of testing device for piezocomposite sensors
Zlámal, Radim ; Chalupa, Jan (referee) ; Kšica, Filip (advisor)
Presented bachelor’s thesis describes the design and the following assembly of a device used for testing MFC sensors. In the first part, fundamental theoretical findings regarding main properties of the sensors are listed, including their description and comparison with other piezoelectric materials. Available methods for measuring a response from the sensor are mentioned sequentially by means of applied stress (tension/compression, bending, torsion). The second part focuses on realization of the device based on the chosen physical principle for loading the tested specimen, to which the sensor is firmly attached. Construction of the device is designed and adjusted to meet the input requirements and boundary conditions for bending. Both hardware and software are selected to simulate the specific form of mechanical loading. The last part involvesstatic measurements of deformations on the specimen using a charge amplifier, as well as modelling of various dynamic cycles sensed by utilizing a load resistor. Voltage signal from the sensor is converted to strain, which is further transformed into deflection for measurement verification, and finally, the functionality of the entire device is evaluated.
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Automatic monitoring of fluid density
Bebej, Rastislav ; Chalupa, Jan (referee) ; Krejčí, Petr (advisor)
This thesis focuses on creating a device capable of monitoring the density of liquids during the fermentation process. The thesis includes the selection of a suitable principle for the measurement of the density of liquids, including the temperature compensation, the selection of suitable components and the design of schematics. Furthermore, the thesis deals with the design of a printed circuit board and wireless data transmission to a computer via Wi-Fi.
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Analog front-end for piezoelectric sensor
Wich, Petr ; Chalupa, Jan (referee) ; Rubeš, Ondřej (advisor)
The purpose of the thesis was to describe and compare the properties of analog front end for piezoelectric sensor circuits. First, the basic circuit was described, then the design and implementation of the current-to-voltage converter, the charge amplifier and the circuit for voltage sensors on the parallel resistor. There was construct measuring system for measurement of the circuits. At last was made measurement of the created circuits, results were compared with each other, and their properties described.
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