Dhaksha,the Unmanned Aircraft System in Its New Avatar-Automated Aerial Inspection of India's Tallest Tower

Kumar, K. Senthil; Rasheed, Anjum; Kumar, Rajul; Giridharan, M.

doi:10.5194/isprsarchives-xl-1-w2-241-2013

Cited by 4 publications

(2 citation statements)

References 3 publications

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“…A further extensive application field of UAVs is the georeferenced photogrammetry, see (Everaerts 2008), (Zhang 2008) and (Eisenbeiß 2009). Among others, the use of UAVs in the field of civil engineering was investigated by (Derkx et al 2002), (Menti et al 2007), (Eschmann et al 2011) and (Kumar et al 2013).…”

Section: Principle Civil Applications and Limitations For Using Uavsmentioning

confidence: 99%

Quality Assessment of Unmanned Aerial Vehicle (UAV) Based Visual Inspection of Structures

Morgenthal

Hallermann

2014

Advances in Structural Engineering

222

124

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This paper discusses the application of Unmanned Aerial Vehicles (UAV) for visual inspection and damage detection on civil structures. The quality of photos and videos taken by using such airborne vehicles is strongly influenced by numerous parameters such as lighting conditions, distance to the object and vehicle motion induced by environmental effects. Whilst such devices feature highly sophisticated sensors and control algorithms, specifically the effects of fluctuating wind speeds and directions affect the vehicle motion. The nature of vehicle movements during photo and video acquisition in turn affect the quality of the data and hence the degree to which damages can be identified. This paper discusses the properties of such flight systems, the factors influencing their movements and the resulting photo quality. Based on the processed data logged by the high precision sensors on the UAV the influences are studied and a method is shown by which the damage assessment quality may be quantified.

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Section: Principle Civil Applications and Limitations For Using Uavsmentioning

confidence: 99%

Quality Assessment of Unmanned Aerial Vehicle (UAV) Based Visual Inspection of Structures

Morgenthal

Hallermann

2014

Advances in Structural Engineering

222

124

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“…Through the use of remote checking using UAVs, the monitoring and inspection of buildings can be brought to a new level of quality and saving. There are several papers in the literature that relate to the use of UAVs [13][14][15] in this field, and several algorithms that have been implemented were developed for the automatic extraction of deformations or damage. Works that have investigated the use of UAVs, using both nadir and oblique images, have studied contributions in terms of accuracy and advantages in the study of buildings with such systems [16].…”

Section: Introductionmentioning

confidence: 99%

The Use of Nadir and Oblique UAV Images for Building Knowledge

Vacca

Dessì

Sacco³

2017

IJGI

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This paper focuses on the processing and study of 3D models obtained from images captured by an unmanned aerial vehicle (UAV). In particular, we wanted to study the accuracy gains achieved in the surveying and the measurement, such as height, area, and volume, of the dimensions of the buildings in the 3D models obtained with both nadir and oblique UAV flights. These latter types of flights are particularly suitable for the 3D modeling of cities or urban agglomerations, where it is important to achieve a complete building reconstruction, including façades and footprints of buildings. For this purpose, several UAV surveys with both nadir and oblique axes were performed. The nadir flight acquired images over an area of about 3.5 hectares containing 30 buildings, while the second flight, performed with both a nadir camera and an oblique camera, was conducted on a single building. The images from the flights were processed with Photoscan software by Agisoft and with Pix4D, studying their different potentialities and functionality. The results were compared with the data from the 1:2000 scale Geotopographic Database (DBGT), with the results of a Global Navigation Satellite System (GNSS) survey and with 3D model from the Terrestrial Laser Scanner (TLS) survey. The obtained results have shown that oblique UAV flights increase the achievable accuracy both in terms of the number of points in a point cloud, and in the in measurements taken on the 3D models, with respect to the limited cost, and at the increase in time for surveying and image processing.

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Using UAS for Roofs Structure Inspections at Post-occupational Residential Buildings

Silveira

Melo

Costa

2020

Lecture Notes in Civil Engineering

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Dhaksha,the Unmanned Aircraft System in Its New Avatar-Automated Aerial Inspection of India's Tallest Tower

Abstract: ABSTRACT:DHAKSHA, the unmanned aircraft system (UAS), developed after several years

Cited by 4 publications

References 3 publications

Quality Assessment of Unmanned Aerial Vehicle (UAV) Based Visual Inspection of Structures

Quality Assessment of Unmanned Aerial Vehicle (UAV) Based Visual Inspection of Structures

The Use of Nadir and Oblique UAV Images for Building Knowledge

Using UAS for Roofs Structure Inspections at Post-occupational Residential Buildings

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