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Nano-stage with a large range of positionig for AFM microscopy
Číp, Ondřej
We present a new concept of long-range positioning stage for scanning probe microscopy. We developed the stuck planchet moving stage where X-Y axes of positioning are controlled by two incremental piezoelectric actuators. We demonstrated moving range up to 7 mm of positioning in both axes. The absolute position of the stage is measured by two optical linear encoders. The resolution of the positioning is about 10 nm.
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Form Input Fileds Detection in Scanned Documents
Moravec, Michal ; Šimon, Martin (referee) ; Beran, Vítězslav (advisor)
Main goal of the work was to implement an algorithm, which is able to separate input fields from card of the health insurance company, which are then used in some optical character recognition (OCR) software to convert it to text. The program should also work on incorrectly scanned and arbitrarily rotated cards. The whole project was made as a contract for the Medingo company, which will be able to implement the algorithm in their existing system. As for the results, the program is able to detect and separate input fields from cards with very high probability.
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Automatic Generation of Scanning Positions for Sheet Metal Parts Digitization
Koutecký, Tomáš ; Druckmüller, Miloslav (referee) ; Matula, Pavel (referee) ; Morovič,, Ladislav (referee) ; Brandejs, Jan (advisor)
This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.
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Pulse Oxymeter in LabVIEW
Fojtík, Tomáš ; Rychtárik, Milan (referee) ; Čmiel, Vratislav (advisor)
Topic of bachelor thesis is the design and implementation of a system for measuring blood oxygen saturation and heart rate measurements. Is used for scanning optical probe is made by hand and amplifier made on a universal printed circuit board . The measurements used measuring NI USB card 6221. Custom design program is being implemented in the programming environment of LabVIEW Version 8.2
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Optimization of technological parameters of injection plastic parts
Hamáček, Richard ; Hlaváček, Martin (referee) ; Kandus, Bohumil (advisor)
This project is dealt with optimalization of moulding procedure of plastic housing of headlamp for project DCW 204 Mopf halogen. The aim is reach a shorter injection moulding cycle time with keeping of claim quality of plastic part. Optimalization will be done based on modification of moulding pressing time. We observe warpage in axis X in the most problematical points of housing by using of contactless measuring optical technologie ATOS III Triple Scan. Simulation analysis for injection moulding was used for prediction of housing warpage up to unforming in every chosen moulding pressing time. According to reaching data in this way comparison of predicted warpage was able to done up to unforming time and real warpage of housing after unforming. According to reaching data in a different period of time warpage of housing during time flowing was observed.
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Lower limb prosthetics FEM analysis
Omasta, Milan ; Náhlík, Luboš (referee) ; Paloušek, David (advisor)
This masters´s thesis deals with computational modeling of transtibial lower-limb prosthesis. For assesment of loading character and geometrical configuration, the gait analysis of an amputee, including ground reaction force measurement, strain gauge analysis and motion analysis, was accomplished. Information on geometry was obtained using 3D optical scanning procedure. Material model was gathered using non-destructive mechanical testing and mimicked in a FEA software. For loading conditions the static structure analysys using FEM was accomplished. The critical poins in construction was found. Recognition of agreement about experimental and computational model was accomplished.
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Design and construction of the drive unit for universal tips measurement micropositioning system
Zeman, Pavel ; Havlíček, Tomáš (referee) ; Pavlík, Michal (advisor)
This work deals with design and construction of the drive unit for universal tips measurement micropositioning system. Measurement system can be used for measuring parameters of structures as thick film layers and thin film layers. The parameters of substrate will be measured by measuring tips. These tips must be fixed on target position by using stepper motors with high accuracy. For movement of substrate will be used two direct-current motors. Position of this substrate is scanned in two axes by two optical CCD chips. This work contains the proposal of software for all used microcontrollers. Activity of system is controlled by certain serial bus.
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Application of modern technologies for the production of the release mechanism of a car door
Hruška, Lukáš ; Dvořáček, Jan (referee) ; Sedlák, Josef (advisor)
The Bachelor`s work concerns the production of door ulocking mechanism for a passanger car Renault Megane. From the viewpoint of function and the necessity to keep the exact dimensions of chosen parts were the data for the production obtained by digitalization of a real product. The digitalization was carried out by the contactless optical 3D scanner of GOM mbH company, specifically the developmental series ATOS II Triple Scan. The pin`s data were obtained from parametrical program Autodesk Inventor 2011. For the production of Master models the additive technology Rapid Prototyping, method Fused Deposition Modeling, was used. Master model of the handle was used for the production od solicon mould, that was used for casting of required number of handles from resin. The end of the work deals with a technical and economical assessment of the production. A part of the work is also a summary of the most used methods of Rapid Prototyping and Reversible Engineering.
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Three-dimensional scanning systems
Weidner, Lukáš ; Koutecký, Tomáš (referee) ; Zatočilová, Aneta (advisor)
This bachelor thesis deals with optical and laser systems which are used in industrial practice.The aim is to give an overview of current systems for 3D digitizing with a focus on laser and optical scanners. This thesis Contains basic division of 3D scanners and overview of methods capturing the third dimension and their characteristics. Furthermore, the work deals with specific optical and laser 3D scanners while providing their description and basic specifications. Finally, the thesis focuses on Areas of application of 3D scanners.
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Data extraction from document scans
Macháč, Bohuslav ; Kolomazník, Jan (advisor) ; Krajíček, Václav (referee)
In this work I developed an application capable of extracting data from scanned documents. For optical character recognition, I used external OCR engine Tesseract, but it can be easily changed. I use document templates, which have informations about data areas and its data types. I tried to automatize most of the steps which are required to extract data or create new data template. User can improve or change results of these steps. For export from application I implemented components, which export data to XML, HTML or plain text. Another components can be easily added, to adapt application for various uses.
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