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Alternative control SW for dedicated thermal performance chambers with customized UI
Žlebek, Jan ; Veselý, Libor (referee) ; Václavek, Pavel (advisor)
This thesis is oriented on simulating thermal chambers, their SW and HW and improving SW to meet specifications. Testing problematics connected with this thesis is briefly mentioned also. Thermal chambers used here are dedicated to run simulating test procedures for thermostats and similar devices designed to sense temperature and regulate it. Design and realisation of new SW are clarified in latter chapters of this thesis, as well as evaluating functionality and resulting dynamics and accuracy.
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An Extended Model of a MEMS Gyroscope: Design and Identification
Vágner, Martin ; Sopata,, Milan (referee) ; Tůma, Jiří (referee) ; Beneš, Petr (advisor)
The thesis is aimed on measurement and modeling of MEMS gyroscopes based on input-output characteristics. The first part briefs the state of the art. The second part is dedicated to measurement methodology. Critical points and sources of uncertainty are discussed and evaluated using measurements or simulations. The last part shows key characteristics of MEMS gyroscopes based on the survey of a group of different sensor types. The results have revealed significant influence of supply voltage that causes bias drift of the gyroscope and bias drift of the internal temperature sensor. The error can be comparable to temperature drift; however, this effect is not addressed in the literature. The second observed effect is temperature dependency of angle random walk. In the last part, a general model of a MEMS gyroscope is rewritten to reflect observed effects. Moreover, the structure is selected to be easily extendable and the coefficients are expressed to allow a comparison of nominal parameters of different sensors.
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The device for temperature sensors calibration
Tomíček, Pavel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design a device that allows calibrating temperature sensors. The device is made of a thermal chamber with Peltier module. Part of this work discusses means of temperature measurement, control and regulation. This work describes design of circuit and PCB. The device can precisely control temperature and temperature profile. It can also automatically calibrate Pt100 and Pt1000 sensors. User can control the device either by interface on the device or from a computer. Temperature range inside the thermal chamber is from 7,5 °C to 115 °C with ±0,10 °C error.
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Predictive maintenance with wireless data transfer
Pernica, Michal ; Najman, Jan (referee) ; Dobossy, Barnabás (advisor)
This thesis deals with predictive maintenance and the use of NB-IoT network for its purpose. In the first part of the thesis, the wireless technologies for data transmission are presented, followed by a description of the different types of communication protocols, and lastly, the process of developing predictive maintenance is described. In the second part of the thesis, a server application for predictive maintenance purposes is presented, system control using a microcontroller, the NB-IoT module SIM700E is introduced along with its specifications, connection to the NB-IoT network and implementation of the MQTT protocol. Also, the server software composed of the MQTT broker, Node-Red, Influx DB and Grafana is described. The third section describes the application of predictive maintenance on two devices, namely a thermal chamber and a pneustand. The function of these systems is described, followed by the modifications applied. Afterwards, the fault conditions we want to detect are mentioned and then classifiers are trained to determine the condition. Finally, the control of the systems is redesigned so that it can be done using a microcontroller. Finally, experiments are performed while operating the device and verifying the functionality of predictive maintenance to identify the condition.
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The device for temperature sensors calibration
Tomíček, Pavel ; Novotný, Radovan (referee) ; Levek, Vladimír (advisor)
The goal of this thesis is to design a device that allows calibrating temperature sensors. The device is made of a thermal chamber with Peltier module. Part of this work discusses means of temperature measurement, control and regulation. This work describes design of circuit and PCB. The device can precisely control temperature and temperature profile. It can also automatically calibrate Pt100 and Pt1000 sensors. User can control the device either by interface on the device or from a computer. Temperature range inside the thermal chamber is from 7,5 °C to 115 °C with ±0,10 °C error.
|
|
|
Alternative control SW for dedicated thermal performance chambers with customized UI
Žlebek, Jan ; Veselý, Libor (referee) ; Václavek, Pavel (advisor)
This thesis is oriented on simulating thermal chambers, their SW and HW and improving SW to meet specifications. Testing problematics connected with this thesis is briefly mentioned also. Thermal chambers used here are dedicated to run simulating test procedures for thermostats and similar devices designed to sense temperature and regulate it. Design and realisation of new SW are clarified in latter chapters of this thesis, as well as evaluating functionality and resulting dynamics and accuracy.
|
|
|
An Extended Model of a MEMS Gyroscope: Design and Identification
Vágner, Martin ; Sopata,, Milan (referee) ; Tůma, Jiří (referee) ; Beneš, Petr (advisor)
The thesis is aimed on measurement and modeling of MEMS gyroscopes based on input-output characteristics. The first part briefs the state of the art. The second part is dedicated to measurement methodology. Critical points and sources of uncertainty are discussed and evaluated using measurements or simulations. The last part shows key characteristics of MEMS gyroscopes based on the survey of a group of different sensor types. The results have revealed significant influence of supply voltage that causes bias drift of the gyroscope and bias drift of the internal temperature sensor. The error can be comparable to temperature drift; however, this effect is not addressed in the literature. The second observed effect is temperature dependency of angle random walk. In the last part, a general model of a MEMS gyroscope is rewritten to reflect observed effects. Moreover, the structure is selected to be easily extendable and the coefficients are expressed to allow a comparison of nominal parameters of different sensors.
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