|
|
Implementation of methods for measurement of rotational speed using cRIO platform
Fábry, Tomáš ; Uher, Miroslav (referee) ; Havlíková, Marie (advisor)
This diploma thesis implements methods for a measurement of rotational speed. It is implemented on the Compact RIO platform from National Instruments. Corresponding SW is implemented using the graphical programming language G in LabView environment. Developed system uses two different sensors – incremental encoder and tacho sensor for measurements of rotational speed. Thesis further analysis and implements a method for an encoder nonlinearity determination and for its on-line correction. For used methods, effects adding errors into the measurements are evaluated and quantified.
|
|
|
Measurement of the centrifugal acceleration
Košta, Ondřej ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This work is concerned with design and realization of rotational speed sensor based on measuring of the centrifugal acceleration. The measuring chain is designed as wireless, because it is needed to transfer the information about acceleration from rotating shaft, so connection by wire is impossible. The measuring chain is realized by using convenient MEMS accelerometer, that's why the first chapter is dedicated to short introduction of MEMS technology. Then the reader is introduced to methods and physical principles of acceleration measurement. The two most used types of accelerometers, piezorezistive and capacitive, are described deeper. The last theoretical chapter deals with two ways how to determine rotational speed from acceleration. The process of design of the measuring chain is described in the practical part of work. There are reasons for choosing a microcontroller. Sampling and message sending algorithms are described, there is also a description how AP receives messages. The AP serves as bridge between transmitting part and PC. Measured data are processed by PC in developing environment LabVIEW. Then the virtual instrument, which process measured data and represents them on screen for the user, is described. Finally the mechanical parts of the centrifugal acceleration measurement tool are described.
|
|
|
Implementation of methods for measurement of rotational speed using cRIO platform
Fábry, Tomáš ; Uher, Miroslav (referee) ; Havlíková, Marie (advisor)
This diploma thesis implements methods for a measurement of rotational speed. It is implemented on the Compact RIO platform from National Instruments. Corresponding SW is implemented using the graphical programming language G in LabView environment. Developed system uses two different sensors – incremental encoder and tacho sensor for measurements of rotational speed. Thesis further analysis and implements a method for an encoder nonlinearity determination and for its on-line correction. For used methods, effects adding errors into the measurements are evaluated and quantified.
|
|
|
Measurement of the centrifugal acceleration
Košta, Ondřej ; Havránek, Zdeněk (referee) ; Beneš, Petr (advisor)
This work is concerned with design and realization of rotational speed sensor based on measuring of the centrifugal acceleration. The measuring chain is designed as wireless, because it is needed to transfer the information about acceleration from rotating shaft, so connection by wire is impossible. The measuring chain is realized by using convenient MEMS accelerometer, that's why the first chapter is dedicated to short introduction of MEMS technology. Then the reader is introduced to methods and physical principles of acceleration measurement. The two most used types of accelerometers, piezorezistive and capacitive, are described deeper. The last theoretical chapter deals with two ways how to determine rotational speed from acceleration. The process of design of the measuring chain is described in the practical part of work. There are reasons for choosing a microcontroller. Sampling and message sending algorithms are described, there is also a description how AP receives messages. The AP serves as bridge between transmitting part and PC. Measured data are processed by PC in developing environment LabVIEW. Then the virtual instrument, which process measured data and represents them on screen for the user, is described. Finally the mechanical parts of the centrifugal acceleration measurement tool are described.
|
guest ::
