Detection and Localization of Powerline Insulators Using Lidar and Camera Data Synthesis Onboard Unmanned Aerial Vehicle
Detekce a lokalizace izolátorĹŻ vedenĂ vysokĂ©ho napÄ›tĂ pomocĂ syntĂ©zy dat z lidaru a kamery na bezpilotnĂm vzdušnĂ©m prostĹ™edku
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České vysoké učenà technické v Praze
Czech Technical University in Prague
Czech Technical University in Prague
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2025-06-16
Abstract
Izolátory na vedenĂ vysokĂ©ho napÄ›tĂ musĂ bĂ˝t pravidelnÄ› kontrolovány, protoĹľe jejich poškozenĂ mĹŻĹľe vĂ©st k vĂ˝padkĹŻm elektrickĂ© energie. SouÄŤasnĂ© inspekce s pilotovanĂ˝m vrtulnĂkem jsou nákladnĂ© a neefektivnĂ. Tato diplomová práce navrhuje metodu autonomnĂ inspekce pomocĂ bezpilotnĂho prostĹ™edku, která vyuĹľĂvá fĂşzi dat z LiDARu a kamery pro detekci a lokalizaci izolátorĹŻ. NavrĹľená metoda vyuĹľĂvá neuronovou sĂĹĄ YOLOv3-tiny pro detekci izolátorĹŻ z obrazu, projektuje bodová mraÄŤna z LiDARu do obrazu, provádĂ jejich shlukovánĂ algoritmem DBSCAN, rozpozná izolátory prostĹ™ednictvĂm autokorelace a odhaduje orientaci izolátoru metodami RANSAC nebo PCA. Práce dále navrhuje metodu plánovánĂ inspekce okolo stožáru a navádĂ bezpilotnĂ prostĹ™edek k pozicĂm pro poĹ™ĂzenĂ snĂmkĹŻ detekovanĂ˝ch izolátorĹŻ. Metoda byla otestována v simulaci na dvou typech věžà a vĂ˝sledky prokázaly funkÄŤnost obdrĹľenĂm snĂmkĹŻ všech izolátorĹŻ.
Insulators on high-voltage power lines must be regularly inspected, as damage can lead to power outages. Traditional inspections using manned helicopters are costly and inefficient. This paper proposes a method for autonomous UAV-based inspection by fusing LiDAR and camera data to detect and localize insulators, which are to be inspected. The proposed method uses YOLOv3-tiny for object detection from image data, projects LiDAR points into the image, clusters them with DBSCAN, recognizes insulators using autocorrelation, and finally estimates orientation using RANSAC or PCA. The thesis also proposes an inspection planning algorithm that operates near the tower structure and guides the UAV to visit optimal viewpoints for capturing images of the detected insulators. The method was validated in a simulation using two types of towers, demonstrating its effectiveness through the successful acquisition of images for all insulators.
Insulators on high-voltage power lines must be regularly inspected, as damage can lead to power outages. Traditional inspections using manned helicopters are costly and inefficient. This paper proposes a method for autonomous UAV-based inspection by fusing LiDAR and camera data to detect and localize insulators, which are to be inspected. The proposed method uses YOLOv3-tiny for object detection from image data, projects LiDAR points into the image, clusters them with DBSCAN, recognizes insulators using autocorrelation, and finally estimates orientation using RANSAC or PCA. The thesis also proposes an inspection planning algorithm that operates near the tower structure and guides the UAV to visit optimal viewpoints for capturing images of the detected insulators. The method was validated in a simulation using two types of towers, demonstrating its effectiveness through the successful acquisition of images for all insulators.
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Vysokoškolská závÄ›reÄŤná práce je dĂlo chránÄ›nĂ© autorskĂ˝m zákonem. Je moĹľnĂ© poĹ™izovat z nÄ›j na svĂ© náklady a pro svoji osobnĂ potĹ™ebu vĂ˝pisy, opisy a rozmnoĹľeniny. Jeho vyuĹľitĂ musĂ bĂ˝t v souladu s autorskĂ˝m zákonem v platnĂ©m znÄ›nĂ.
A university thesis is a work protected by the Copyright Act of the Czech Republic. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one`s own expense. The use of thesis should be in compliance with the Copyright Act.
A university thesis is a work protected by the Copyright Act of the Czech Republic. Extracts, copies and transcripts of the thesis are allowed for personal use only and at one`s own expense. The use of thesis should be in compliance with the Copyright Act.