Static and dynamic displacement measurements of structural elements using low cost RGB-D cameras

2017 ◽  
Vol 153 ◽  
pp. 97-105 ◽  
Author(s):  
Jean Michel Franco ◽  
Byron Mauricio Mayag ◽  
Johannio Marulanda ◽  
Peter Thomson
Keyword(s):  
Low Cost ◽  
Structural Elements ◽  
Dynamic Displacement ◽  
Displacement Measurements

Statistical analysis of undersampled dynamic displacement measurements

1998 ◽  
Author(s):  
Daniele Inaudi ◽  
Joel P. Conte ◽  
Nicholas Perregaux ◽  
Samuel Vurpillot
Keyword(s):  
Statistical Analysis ◽  
Dynamic Displacement ◽  
Displacement Measurements

scholarly journals Tools for fast analysis of InSAR based displacement maps

2020 ◽  
Author(s):  
Oriol Monserrat ◽  
Anna Barra ◽  
Roberto Tomás ◽  
José Navarro ◽  
Lorenzo Solari ◽  
...  
Keyword(s):  
Ground Motion ◽  
Low Cost ◽  
Radar Data ◽  
Reliable Information ◽  
Automatic Extraction ◽  
Preliminary Assessment ◽  
Fast Analysis ◽  
Significant Information ◽  
Displacement Maps ◽  
Displacement Measurements

<p>The use of satellite interferometry (InSAR) is exponentially growing for the detection and monitoring of geohazard related movements. InSAR technique allows to process large areas and to extract high number of displacement measurements at low cost. By the way, the outputs consist of high volumes of information whose interpretation can be complex and time-consuming, mostly for users who are not familiar with radar data. Moreover, the use of InSAR have been moving from local to national, and now we are going towards a European application. In this scenario, the development of methodologies and tools to automatize the extraction of significant information and to facilitate the interpretation of the results, is more and more needed in order to increase their operational use. In this work we present a series of tools developed in the framework of the projects DEMOS (CGL2017- 83704-P), Momit (S2R-H2020/777630), Safety (ECHO/SUB/2015/718679) and U-Geohaz (UCPM-2017-PP-AG/783169). The so-called ADA (Active Displacement Areas) tools have been developed with the aim of ease the management, the use and the interpretation of wide areas results. Starting from the semi-automatic extraction of the most significant Active Displacement Areas (ADAFinder tool) we move to an automatic preliminary assessment of the phenomena that is behind the detected movement (ADAClassifier tool). All these tools go in the same direction of the European Ground Motion Service (EU-GMS) project, which will provide consistent, regular and reliable information regarding natural and anthropogenic ground motion phenomena all over Europe.</p>

Displacement measurements in structural elements by optical techniques

2000 ◽  
Vol 34 (2) ◽  
pp. 75-85 ◽  
Author(s):  
Rolando González-Peña ◽  
Rosa Marı́a Cibrián-Ortiz de Anda ◽  
Angel J Pino-Velazquez ◽  
José Soler-de la Cruz ◽  
Yhoama González-Jorge
Keyword(s):  
Structural Elements ◽  
Optical Techniques ◽  
Displacement Measurements

scholarly journals Focusing on reducing the earthquake damage to facade systems

2011 ◽  
Vol 44 (2) ◽  
pp. 108-120 ◽  
Author(s):  
A. Baird ◽  
A. Palermo ◽  
S. Pampanin ◽  
P. Riccio ◽  
A.S. Tasligedik
Keyword(s):  
Earthquake Engineering ◽  
Low Cost ◽  
Modern Society ◽  
Design Guidelines ◽  
Economic Consequences ◽  
Structural Elements ◽  
Structural Components ◽  
Structural Skeleton ◽  
Technical Solutions ◽  
Resistance Structure

Earthquake engineering is facing an extraordinarily challenging era. These challenges are driven by the increasing expectations of modern society to provide low-cost, architecturally appealing structures with high seismic performance. Modern structures need to be able to withstand a design level earthquake with limited or negligible damage such that disruption to business be minimised because of the economic consequences of such downtime. Technological solutions for seismic resisting structural systems are emerging. However, within the goal of developing a seismic-resisting building, not only the structural skeleton of the building but the entire system must be fully protected from damage. This includes the non-structural components of the building such as the claddings, ceilings and contents. Substantial studies are still required to develop technological solutions and design methods capable of achieving such an earthquake resistance structure. This paper presents a review of current technology for facades, including design guidelines for seismic-resistant non-structural components and the steps made towards a performance-based design framework. Alternative conceptual strategies and technical solutions to reduce the damage to non-structural elements will also be introduced.

Desarrollo de un Sistema de Cultivo Tisular Híbrido y Multicomponente Usando Polímeros de Soporte Impresos 3D

2021 ◽  
Author(s):  
◽  
C. A. Romero Zepeda
Keyword(s):  
Tissue Engineering ◽  
Pharmaceutical Industry ◽  
3D Printing ◽  
Low Cost ◽  
Three Dimensional ◽  
Alternative Methods ◽  
Structural Elements ◽  
Different Types ◽  
Organ On A Chip ◽  
Printing Method

The development of different types of Organ on a Chip has attract the attention of pharmaceutical industry to develop alternative methods for ensuring the efficiency of drugs before approval. A dual bioprinting-culturing system was developed to construct the needed elements needed for creating three dimensional tissues including the corresponding instrumented device that may keep the environment conditions that may reinforce the cells´ growth. The proposed 3D printing platform considering the principles of an Organ on a Chip for the creation of a hybrid system of scaffolds for tissue engineering using polylactic acid. The usage of the 3D printing method allows the modification and creation of a flexible platform with different structures to a low cost, including the possibility of introducing the structural elements to create multi component tissues. The developed system was tested using a traditional fibroblasts culture.

scholarly journals Damage Detection in Composites by LAI-PZT Transducer

2019 ◽  
Author(s):  
Ali Mohammadabadi ◽  
Roberto Dugnani
Keyword(s):  
Composite Structures ◽  
Low Cost ◽  
Characteristic Impedance ◽  
Transverse Mode ◽  
Matrix Cracking ◽  
Structural Elements ◽  
Manufacturing Defects ◽  
Acoustic Transducer ◽  
Effective Impedance ◽  
Non Destructive

Composite structures are known for being susceptible to manufacturing defects andin-service damage. Since damage in composites is not always visually apparent, Non-Destructive Techniques (NDT) such as ultrasonic imaging are often employed to detect andquantify damage [1]. Materials such as carbon-epoxy and fiberglass-epoxy plates arefrequently used as structural elements in the both the civil and aerospace industry. Structuremade of these materials display high acoustic impedances along the direction of the fibers butbehave as Low Acoustic Impedance (LAI) materials in the transverse direction (i.e., throughthe composite’s thickness). It follows that LAI acoustic transducer are generally moreappropriate to scan and detect damage/defects through the thickness in various types ofanisotropic structures. When transducers are coupled in a direction orthogonal to the resonantmode they display significantly lower characteristic impedance than if coupled in the samedirection. In some cases, this feature can eliminate the need for intermediate “matching”films and makes LAI transducer desirable for acoustic imaging applications. In this paper weintroduce the use of low-cost, low effective impedance PZT transducer for damage detectionin LAI structures. This manuscript also describes results from both numerical modeling anddamage detection testing performed using a prototype transducer. In the future simple andeconomical transducers resonated in their transverse mode rather than the thickness modecould be used to detect damage such as matrix cracking and delamination of the compositestructure.

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