Spelling suggestions: "subject:"pylori""
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Visual localisation of electricity pylons for power line inspectionAli, Emmanuel Yahi 08 September 2023 (has links) (PDF)
Inspection of power infrastructure is a regular maintenance event. To date the inspection process has mostly been done manually, but there is growing interest in automating the process. The automation of the inspection process will require an accurate means for the localisation of the power infrastructure components. In this research, we studied the visual localisation of a pylon. The pylon is the most prominent component of the power infrastructure and can provide a context for the inspection of the other components. Point-based descriptors tend to perform poorly on texture less objects such as pylons, therefore we explored the localisation using convolutional neural networks and geometric constraints. The crossings of the pylon, or vertices, are salient points on the pylon. These vertices aid with recognition and pose estimation of the pylon. We were successfully able to use a convolutional neural network for the detection of the vertices. A model-based technique, geometric hashing, was used to establish the correspondence between the stored pylon model and the scene object. We showed the effectiveness of the method as a voting technique to determine the pose estimation from a single image. In a localisation framework, the method serves as the initialization of the tracking process. We were able to incorporate an extended Kalman filter for subsequent incremental tracking of the camera relative to the pylon. Also, we demonstrated an alternative tracking using heatmap details from the vertex detection. We successfully demonstrated the proposed algorithms and evaluated their effectiveness using a model pylon we built in the laboratory. Furthermore, we revalidated the results on a real-world outdoor electricity pylon. Our experiments illustrate that model-based techniques can be deployed as part of the navigation aspect of a robot.
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Zpracování metodiky a podpory pro vyhodnocení naměřených hodnot uzemnění stožárů VVN v souvislosti s PNE 33 3300-1 / Development of methodology and supporting tool for evaluation of measured values of high voltage poles grounding systems according standard PNE 33 3300-1Kováč, Frederik January 2020 (has links)
Diploma thesis is oriented on measuring and evaluation of grounding conditions of HV pylons. In theoretical part is described theory of grounding including related legislation, impact of electric current on human body, methods of measuring earth resistance, soil resitivity and description of available measurers. Practical part is focused on measuring earth resistance of selected pylons and measuring procedures followed by evaluation of measurements according to person's safety from dangerous touch voltage and impact of lightings. For evauluation of measured data is created supporting tool in MS Excel. In the last part of thesis are described recommendations for cutting-down touch voltages.
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Stavebně technologický projekt Sportovního centra v Brně / Construction technology project of the Sports Center in BrnoKuchta, Peter Unknown Date (has links)
This diploma thesis concerns construction technology preparation of a sport centre in Brno, Řečkovice. The objective of the thesis is to design economically appropriate course of construction works, in accordance with technological requirements and principles of health and occupational safety during the realization of particular structures and parts of the construction. The thesis contains basic information about the construction, the developer, the author of the project documentation and about conducted surveys. Further it includes the construction technology project, its financial and time effort, traffic relations of the construction site, the situation of the construction site, proposal of the machinery equipment, economical of the principal construction machinery and technological standard. This thesis is focused on lower gross fabric with special foundation on pylons.
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Lávka přes Labe / Footbridge across the LabeKrč, Rostislav January 2017 (has links)
The thesis focuses on design of prestressed concrete footbridge which passes pedestrian and bicycle path over the Elbe river near city of Celakovice in the Czech Republic. Three different bridge options were analyzed and for further development a cable-stayed footbridge was chosen. Its bridge deck is formed of a box girder supported by cables in its vertical axis and all cable stays are anchored into two concrete A-shaped pylons. This structure was analyzed in SCIA Engineer and assessment of serviceability limit states and ultimate limit states according to recent European standards (Eurocodes) was made. Both the global structural behavior and the local structural integrity of box cross-section were assessed as well as construction stages and cross-sections of pylons and cable stays. Assessments were performed in IDEA StatiCa combined with hand calculations. Eventually a dynamic response of structure was analyzed. Natural modes and frequencies were found and forced oscillation response was evaluated. The thesis includes technical drawings, construction process and visualization.
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Visutá lávka přes Labe / Suspension footbridge across the Elbe RiverGregor, Petr January 2012 (has links)
The objective of this master´s thesis is a design of suspension footbridge across the Elbe river. The footbridge is suspended construction by three spans. The brick deck is supported on the outer edges and it is kept in a parabolic arc. The suspension cables are kept at two inclined levels. The model is implemented in the program ANSYS. The solution is non-linear. The designe is according to the europien standart.
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