Towards Remote Inspections of FPSO's Using Drones Instrumented with Computer Vision and Hyperspectral Imaging

2021 ◽  
Author(s):  
Erik Stensrud ◽  
Are Torstensen ◽  
Dag-Børre Lillestøl ◽  
Kristian Klausen
Keyword(s):  
Computer Vision ◽  
Hyperspectral Imaging ◽  
Cost Savings ◽  
Destructive Testing ◽  
Ongoing Research ◽  
Class Society ◽  
Safety Improvement ◽  
Survey Costs ◽  
Remote Inspection ◽  
Non Destructive

Abstract The Class Society DNV has performed production surveys in enclosed spaces using drones since 2016, demonstrating cost savings and increased personnel safety. The goal is to develop autonomous inspection drones to reduce the need to enter tanks and enable remote inspection. The vision is a drone that can fly by itself, track where it is, and spot rust and cracks, and measure steel thickness. We expect that drone-assisted remote inspection will reduce survey costs for the clients and be a major safety improvement for surveyors. Several drone capabilities are required to enable visual close-up inspection and non-destructive testing in enclosed, GPS-denied, and poorly lit environments. In this study, we report the most recent status from an ongoing research project, including several industry partners. We highlight technical challenges and preliminary results on drone navigation functionalities, computer vision for detection of cracks, and the use of hyperspectral imaging to detect and classify the chemical composition of coatings, rust, and other use cases.

A Fracture Mechanics-Based Feasibility Study of Damped Steel Catenary Risers for Pre-Salt Field Developments

2019 ◽  
Author(s):  
Alexandre G. Garmbis ◽  
Petrônio Zumpano ◽  
Ludimar L. Aguiar ◽  
Raphael M. Brito ◽  
Domingos A. Rade
Keyword(s):  
Fracture Mechanics ◽  
Input Data ◽  
Limit State ◽  
Cost Savings ◽  
Great Effort ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Performance Improvements ◽  
Steel Catenary Risers ◽  
Non Destructive

Abstract In order to enhance competitiveness of rigid risers for the Brazilian pre-salt, great effort has been devoted to study the feasibility of Steel Catenary Risers (SCR) directly connected to Floating Production Storage and Offloading (FPSO) units, where cost savings are expected from the reduction of pipe buoyance modules and overall piping length. A recent paper presented the technical feasibility of Damped SCR, which is a new SCR concept. In that study, some non-field-proven fatigue performance improvements were required, such as girth welds for mechanically lined pipe (MLP) with increased fatigue strength and/or upset end pipes. During the development of this technology, a fracture mechanics approach became essential for the assessment of fatigue and fracture limit state in order to guarantee that the risks associated with fabrication and inspection are within acceptable safety levels. This paper presents the main issues related to fabrication and inspection activities with a particular focus on the smallest critical flaw size. A semi-deterministic Engineering Critical Assessment (ECA) was performed as part of the conceptual design. The uncertainties about input data are discussed and a simplified procedure is proposed. Results are compared with relevant non-destructive testing reliability statistics. This study indicates that the benefits obtained from the use of materials with superior fatigue resistance are limited to the non-destructive testing reliability at some degree. As the proposed methodology deals with uncertainty in input data, a roadmap for the development of a full probabilistic risk assessment of fabrication and inspection feasibility at early design stages is devised.

scholarly journals Method of non-destructive testing of building structures

2020 ◽  
Vol 77 (3) ◽  
pp. 97-100
Keyword(s):  
Acoustic Emission ◽  
Working Conditions ◽  
Control Method ◽  
Schematic Diagram ◽  
Building Structures ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Ongoing Research ◽  
Preliminary Results ◽  
Non Destructive

The purpose of this article is to provide information about ongoing research with coverage of preliminary results. The characteristic of acoustic emission for determining defects and deformations in building structures and working conditions is given. A schematic diagram of the acoustic emission control method is presented.

The Agricultural Products Deterioration Recognition Based on Computer Vision

2014 ◽  
Vol 602-605 ◽  
pp. 2027-2030
Author(s):  
Xiang Jie Niu ◽  
Bin Lan
Keyword(s):  
Computer Vision ◽  
Visual Information ◽  
Agricultural Products ◽  
Internal Quality ◽  
Destructive Testing ◽  
Computer Vision Technology ◽  
Nmr Techniques ◽  
The Relationship ◽  
Non Destructive

The computer vision technology is an important branch of computer science and artificial intelligence which is regarded as a non-destructive testing technique in the field of agriculture with a broad application prospects. This paper introduces the application of the computer vision technology in the agricultural products deterioration recognition, builds foundations for the accurate measurement of the agricultural products quality with computer visions, and establish the relationship between the feature information and quality of the agricultural products. Meanwhile, this paper combined the computer vision technology with infrared, microwave, NMR techniques to extract and test the visual information of the internal quality of the agricultural products.

The value of having standards in non-destructive testing. (a) Metallic

1962 ◽  
Vol 41 (12) ◽  
pp. 740
Author(s):  
W.D. Walker
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Non Destructive

Non destructive testing of works of art by terahertz analysis

2013 ◽  
Vol 64 (2) ◽  
pp. 21001 ◽  
Author(s):  
Jean-Luc Bodnar ◽  
Jean-Jacques Metayer ◽  
Kamel Mouhoubi ◽  
Vincent Detalle
Keyword(s):  
Non Destructive Testing ◽  
Destructive Testing ◽  
Works Of Art ◽  
Non Destructive

Modeling of a sensitive element on a planar mushroom-shaped metamaterial for non-destructive testing and searching for inhomogeneities in technological media

2020 ◽  
pp. 54-59
Author(s):  
A. A. Yelizarov ◽  
A. A. Skuridin ◽  
E. A. Zakirova
Keyword(s):  
Sensitive Element ◽  
Non Destructive Testing ◽  
Destructive Testing ◽  
Resonant Frequency Shift ◽  
Maltese Cross ◽  
Informative Parameters ◽  
Non Destructive ◽  
Cross Type ◽  
Electrodynamic Structure ◽  
Electrophysical Parameters

A computer model and the results of a numerical experiment for a sensitive element on a planar mushroom-shaped metamaterial with cells of the “Maltese cross” type are presented. The proposed electrodynamic structure is shown to be applicable for nondestructive testing of geometric and electrophysical parameters of technological media, as well as searching for inhomogeneities in them. Resonant frequency shift and change of the attenuation coefficient value of the structure serve as informative parameters.

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