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Control of a robotic lawn mower
Škapa, Antonín ; Gábrlík, Petr (referee) ; Jílek, Tomáš (advisor)
This master‘s thesis deals with development and realisation of robotic lawn mower with satelite navigation. It begins with preparation of a platform for outdoor mobile robot navigation and it’s control HW and SW. There are discussed different options of navigation both commercial and experimental. Further on I have chosen the right GNSS receiver based on market research and user experience. The GNSS receiver’s parameters are measured with different antennas. Following with the choice of suitable open-source control unit and it’s software implementation. Furthermore control from a companion computer is described and physical realisation is done. In the end of the thesis activation of the whole mower is performed and described. Lastly there are discussed possible ways of future development.
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Geodetic activities in reconstruction of the road in Otakara Ševčíka street
Suchánková, Tereza ; Machotková, Olga (referee) ; Vondrák, Jiří (advisor)
The subject of this diploma thesis is a description of complex surveying activities during the reconstruction of the road in Otakara Ševčíka Street in cadastral area Židenice. This work describes connection of the points to the coordinate system S-JTSK and to the height system Bpv. Geodetic documentation is made for individual measurements and laying out. Next is the analysis of measurement accuracy and comparison of achieved values with deviations specified in the relevant ČSN.
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The Using of GNSS Permanent Networks for Height Determination
Kuruc, Michal ; Sokol,, Štefan (referee) ; Kostelecký,, Jan (referee) ; Vatrt, Viliam (referee) ; Weigel, Josef (advisor)
This Thesis deals with the evaluation of height accuracy of GNSS point positioning. Many experimental measurements aimed on GNSS and heights issues was realised within this work. The ellipsoidal heights were measured together with the orthometric heights and then the local Quasigeoid model was created. The network of height points was built to realisation of proposed measurements on the territory of the city Brno. The model of Quasigeoid from experimental measurement was compared with any other models of Quasigeoid and with local astronomical model. The partial aim of this Thesis is the proposal of methodology of height determination by GNSS technology and levelling measurement together. We can determine or verify the orthometric heights by using GNSS measurement and this methodology.
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Testing of the accuracy of the heights measured by GNSS
Stolárová, Ivana ; Volařík, Tomáš (referee) ; Kuruc, Michal (advisor)
The diploma thesis deals with a testing of the real coordinates accuracy measured in favorable and unfavorable conditions, which are determined by method GNSS RTK. The work explores the real accuracy and reliability of heights measurement with the signal noise and multipath interference occurring, caused by surrounding vegetation, buildings, power lines, and also the accuracy under optimal conditions while measuring in a meadow. Influence of day time, observation length, correction provider to internal and external precision is watched. It also examines the issues of initialization in these conditions. For this purpose was collected set of statistics containing 960 measurements on 30 points. During survey was used apparatus Trimble R4. GNSS measurements were statistically processed and evaluated and finally the results were compared with the results of Bc. Klára Kordasová, who measured the same tested points with identical methodology using apparatus from Leica company. Results of the thesis can be used in praxis.
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Testing of the Global key of Transformation in Olomouc surroundings
Žák, Jozef ; Volařík, Tomáš (referee) ; Kuruc, Michal (advisor)
This thesis deals with the verification of global transformation key on densification points around Olomouc by selected GNSS methods. The work will be described in GNSS technology, its distribution, measurement methods and services. As part of this work is a description of networks of permanent reference stations. Next, become familiar with the creation of local transformation key to what is used and what is its significance. The measurement was carried out at points densification, described in a separate section. In this thesis is describes surveying methods and principles, the methods of measurement GNSS, equipment, as well as any specific regarding this issue. The result is a clear set of tables with measured values of GNSS equipment and coordinates ZhB, accuracy of the method used (standard deviations), graphical reporting, and comparing the results of the global and local transformation key.
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Testing of the accuracy of the heights determined by GNSS
Kordasová, Klára ; Drápela, Zdeněk (referee) ; Kuruc, Michal (advisor)
The aim of this thesis is to test the accuracy of the heights measured by GNSS RTK with service providers CZEPOS and Trimble VRS Now. The thesis deals with precise of height measurement with the influence of surrounded obstacles, such as multipath, fading with the tall buildings, presence of high-voltage lines, limited shadow horizons at the edge of the forest, and measurement under the ideal conditions. The work also deals with the comparison of the period initialization of these monitored conditions. In the locations mentioned a network of test points was built. For measuring GNSS Leica System 1200 apparatus was used. It was measured always five times in five-second epochs and three times twenty-second epochs for each provider in five locations and thirty points during the mornings and afternoons. For independent height comparison the technical levelling was used. The outcome can be applied in practical use.
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Accuracy analysis of current GNSS sensors
Jabůrek, Ondřej ; Sláma, Jiří (referee) ; Bureš, Jiří (advisor)
The purpose of this thesis is to test and analyze the accuracy of detemining the position and heights of contemporary GNSS receivers in RTK mode using the network of permanent stations CZEPOS with VRS3 - iMAX - MSM product. The test procedures are intended to provide representative results with potential use in conventional surveying applications. The goal of the thesis is to obtain measured data, analyze this data and evaluate the results. Based on this results we should be able to compare the tested devices. The comparison is intended to carry out an information that will help us to select a more suitable receiver for a particulat application in the common practice of surveyor.
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GNSS-RTK Precise Positioning for Engineering Applications
Grečnár, Jiří ; Talácko,, Milan (referee) ; Bureš, Jiří (advisor)
The thesis deals with precision analysis, process optimization and repeatibility of GNSS-RTK measurements for surveying aplication. Measuring procedure, that enables determination of a spatial position with a permissible deviation less than 10mm, was tested based on previous published findings. The test procedure was tested on two sets of test measurements obtained during 27 h and 26 h observations in connection with CZEPOS. The results were later analyzed. The first set of measurements was measured by the RTK3-GG method (9 m and 60 km vectors) and computed by a network solution VRS3-MAX-GG. Both were in ideal conditions – ideal, not obstructed observational horizon and good availability of differential corrections. The second set was measured by RTK3-GG method (22 km and 62 km vectors) and computed by network solution VRS3-MAX-GG. Both were in adverse conditions - obstructed observational horizon and adverse availability of differential corrections. Precision analysis and design of appropriate filtering method and optimal measurement procedure were done based on the results obtained from the test measurements. Optimal measurement procedure was then tested by measurements in a three point network.
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Accuracy analysis of current GNSS sensors
Jabůrek, Ondřej ; Sláma, Jiří (referee) ; Bureš, Jiří (advisor)
The purpose of this thesis is to test and analyze the accuracy of detemining the position and heights of contemporary GNSS receivers in RTK mode using the network of permanent stations CZEPOS with VRS3 - iMAX - MSM product. The test procedures are intended to provide representative results with potential use in conventional surveying applications. The goal of the thesis is to obtain measured data, analyze this data and evaluate the results. Based on this results we should be able to compare the tested devices. The comparison is intended to carry out an information that will help us to select a more suitable receiver for a particulat application in the common practice of surveyor.
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