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A study of cutting forces during the turning process and their measurement
Piroš, Viktor ; Trčka, Tomáš (referee) ; Polzer, Aleš (advisor)
This bachelor’s thesis is structured as a literature search. Its target is to show a complex look at the problematics of force load in turning process. In the beginning, the thesis is focused on brief characteristics of turning process and tool geometry as a one of the main aspects influencing the force load in the machining system. Furthermore, the thesis deals with problematics of force load creation and its dependence on basic cutting parameters. Second part of the thesis is dedicated to the options of force load measurement in turning process and works out an illustrative example of numerical evaluationof measured data with basic statistical indicators in detail.
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Axle detection in the weighing vehicle system
Mičulka, Martin ; Klečka, Jan (referee) ; Šedivá, Soňa (advisor)
This master's thesis deals with the Weight in Motion systems (WIM). The main goal is to create simulation software that detects dual tires assembly with respect to the angle with which the sensor is embedded into the road. Thesis also contains literature search of available solutions of weighing systems and the sensors which are used in these systems. Subsequently, the thesis contains software for recognizing simple assembly or dual tires assembly from real measured data. Software solutions were developed using programming language Python v3.7. All source codes were developed in PyCharm Community Edition 2020.
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Monitoring of dynamic systems with piezoelectric sensors
Svoboda, Lukáš ; Hadaš, Zdeněk (referee) ; Kšica, Filip (advisor)
The aim of this diploma thesis is to describe localization and calculation load identification of dynamic systems using piezoelectric sensors. Finding methods, which would allow us to evaluate loads on simple systems is the key to their application in the structural health monitoring of more complex systems. A theory necessary for understanding and application in aerospace, civil engineering, automobile industry, and train traffic of presented methods is given in the first part of the thesis. In these applications, the methods of wave propagation and different types of neural network methods are used to evaluate load identification. It is possible to evaluate loads by using a time reverse method, a method based on signal deconvolution, and a method based on a voltage amplitude ratio of the piezoelectric sensor. In the next part, the methods are described, the suitable place for gluing of a sensor, and the number of sensors for using method is given. These methods were verified and compared to a simple experimental system. In the following part, the model of the piezoelectric sensor is presented. It is possible to use the model for calculating voltage output from the strain. For methods verification, the problem of train passage in a specific place of the railway is chosen. The speed of the train and its load on the railway was calculated by using these methods.
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A study of cutting forces during the turning process and their measurement
Piroš, Viktor ; Trčka, Tomáš (referee) ; Polzer, Aleš (advisor)
This bachelor’s thesis is structured as a literature search. Its target is to show a complex look at the problematics of force load in turning process. In the beginning, the thesis is focused on brief characteristics of turning process and tool geometry as a one of the main aspects influencing the force load in the machining system. Furthermore, the thesis deals with problematics of force load creation and its dependence on basic cutting parameters. Second part of the thesis is dedicated to the options of force load measurement in turning process and works out an illustrative example of numerical evaluationof measured data with basic statistical indicators in detail.
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|
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Axle detection in the weighing vehicle system
Mičulka, Martin ; Klečka, Jan (referee) ; Šedivá, Soňa (advisor)
This master's thesis deals with the Weight in Motion systems (WIM). The main goal is to create simulation software that detects dual tires assembly with respect to the angle with which the sensor is embedded into the road. Thesis also contains literature search of available solutions of weighing systems and the sensors which are used in these systems. Subsequently, the thesis contains software for recognizing simple assembly or dual tires assembly from real measured data. Software solutions were developed using programming language Python v3.7. All source codes were developed in PyCharm Community Edition 2020.
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|
|
Monitoring of dynamic systems with piezoelectric sensors
Svoboda, Lukáš ; Hadaš, Zdeněk (referee) ; Kšica, Filip (advisor)
The aim of this diploma thesis is to describe localization and calculation load identification of dynamic systems using piezoelectric sensors. Finding methods, which would allow us to evaluate loads on simple systems is the key to their application in the structural health monitoring of more complex systems. A theory necessary for understanding and application in aerospace, civil engineering, automobile industry, and train traffic of presented methods is given in the first part of the thesis. In these applications, the methods of wave propagation and different types of neural network methods are used to evaluate load identification. It is possible to evaluate loads by using a time reverse method, a method based on signal deconvolution, and a method based on a voltage amplitude ratio of the piezoelectric sensor. In the next part, the methods are described, the suitable place for gluing of a sensor, and the number of sensors for using method is given. These methods were verified and compared to a simple experimental system. In the following part, the model of the piezoelectric sensor is presented. It is possible to use the model for calculating voltage output from the strain. For methods verification, the problem of train passage in a specific place of the railway is chosen. The speed of the train and its load on the railway was calculated by using these methods.
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