|
|
Introduction of measurement methodology using 3D scanning technology into mechanical production
Klein, Adam ; Jankových, Róbert (referee) ; Šrámek, Jan (advisor)
This thesis focuses on comparison of the commonly used method of tactile measurement with 3D scanning methods for their introduction into engineering production. The first part summarizes the current state with the description of measurement technologies with emphasis on 3D technologies and their versatile use. The second part presents a practical comparison of three types of measuring devices on a selected component of a bicycle. After numerical and graphical evaluation of the measurement results, these values are further statistically processed and the measurement uncertainties are calculated. The final part of the work evaluates the whole process and presents practical suggestions, options and recommendations.
|
|
|
Capability of body measurement on an in-line 3D measuring device
Čada, Michal ; Jankových, Róbert (referee) ; Šrámek, Jan (advisor)
By developing optical measurement technologies of shapes and elements, it is now possible to measure the carbody directly in the production flow of the welding company's line for the production of cars, the so-called „In-line measurement“. When deploying this control process, you also need to process the amount of data measured using the standard described procedure for process control. The thesis presents a proposal for the introduction and control of the dimensional inspection process of the final product of the welded body.
|
|
|
Minimizing errors in the alignment of the CAD model to the Coordinate Measuring Machine (CMM)
Miko, Jan ; Marek, Tomáš (referee) ; Šrámek, Jan (advisor)
This bachelor thesis is focused on the issue of alignment of measured data to nominal data in the field of metrology - measurement and evaluation of longitudinal dimensions, angles and tolerances of position and shape. The beginning of the work deals with the division of individual types of coordinate measuring machines and various data scanning technologies. The next section describes the measurement process, and especially in what ways the mea-surement can be performed. In the analysis of the use of methods for the alignment of nomi-nal data on a CAD model when measuring on a CMM, the individual methods of alignment are classified and described. The most common defects caused by alignment to a CAD mo-del are covered in the entire chapter, which describes what causes individual defects in most cases. The main part of the bachelor thesis is the study of measurements. In this study, the evaluation of outputs that were obtained after measuring and balancing the measured data on the CAD model of the reference part is processed. The alignment is performed by four diffe-rent methods. Subsequently, the individual methods were compared and the errors that occurred during the alignment were analyzed. In the last part of the work, a statistical evalu-ation of the measurement and determination of the measurement uncertainty is performed on the basis of the measured deviations of the positions of the assessed geometric elements, which occurred on the reference part. At the end of the thesis, the individual outputs that were obtained during the elaboration of the individual goals of the bachelor's thesis and the recommended methods of alignment for a specific application are evaluated.
|
|
|
System of On-/Offline temperature measurement based on Lab View
Stejskal, David ; Hammer, Miloš (referee) ; Prostredník, Daniel (advisor)
The objective of this thesis was to create a LabVIEW-based program for temperature measurement using a personal computer. The program allows reading and post processing of digital signal from a measuring device. This device consists of a sensor type PT100, a measuring transducer and an analog-to-digital converter with USB output. The theoretical part of the thesis deals with resistance temperature sensors, signal analysis and methods for signal processing. The practical part is conceived as a guide to the created program. This part introduces vital sub-elements of the program and describes their principle, practical use and also the operating instructions. As required by thesis assignment, practical part includes verification of the measuring device, which was performed in laboratory of Czech Metrology Institute in Brno.
|
|
| |
|
| |
|
|
Statistical evaluation of dimensional setting the car for 3D measurement
Čada, Michal ; Jankových, Róbert (referee) ; Šrámek, Jan (advisor)
This bachelor´s thesis proposes a dimensional calibration improvement concept for a newly produced car. Before the dimensional calibration itself, a car must be fit in place – aligned into the main graphical coordinate system. Prevalent method of geometric levelling (3-2-1) upon reference points of the chassis does not meet requirements of the contemporary cars, whose support frames blocks accessibility of these points. Proposed alignment method uses advanced laser measuring systems and software capable of 3D scan processing. Statistical evaluation of measured control variables on the car body this bachelor´s thesis proposes minimal allowance limit, for which this method is possible to viable.
|
|
|
Special length sensors
Pavliš, Jakub ; Prostredník, Daniel (referee) ; Jankových, Róbert (advisor)
This bachelor thesis contains a theoretical description of selected length sensors with emphasis on inductive and optical sensors. The main benefit of this thesis is the design and realization of a special inductive sensor with a small pressure force and an optical sensor with a resolution of 2.5 nanometers. In the thesis are analyzed the selected metrological properties of the designed sensors and the formulation of recommendations for their practical use.
|
|
|
Measurement Uncertainties Analyze in Gas Industry
Dominik, Jan ; Zuth, Daniel (referee) ; Vdoleček, František (advisor)
This bachelor thesis is tackling measurement uncertainty problems with gas metering. It is specially focusing on a new prototype gross heating value indicator, which was tested directly on the pipeline. This measurement results are compare with standard volumetric flow indicator and determined measurement uncertainty for the distribution partners.
|
|
| |
guest ::
