The SICMES project develops a prototype for the characterization of composite materials

SICMES.1The TIDOP research group from Higher Polytechnic School of Ávila develops a prototype for the analysis of latest generation materials

 

The SICMES project (photogrammetric system for the mechanical characterization of industrial solutions and materials) comes to an end. The project, which lasted 12 months, was developed by the TIDOP research group and financed by the “Proof of Concept” call of the General Foundation of the University of Salamanca. After its development, a low cost and flexible prototype has been developed able to analyze the deformations suffered by materials of latest generation without maintaining any contact with them (in contrast to the current techniques that need contact with the material yielding imprecise results when there are large deformations). The analysis of these deformations allows engineers to have a valuable and accurate source of information with which to optimize their designs and therefore, lower manufacturing costs. The prototype consists of two SLR cameras with macro lenses, a light source and an electrical coordination system.

3Figura 1: To the left a traditional extinguisher and a new extinguisher concept made in kevlar and; to the right the results obtained during the evaluation of the new concept within the framework of the SICMES project.

The quality and robustness of the prototype has been supported through the analysis of new extinguishers made with the latest generation composite materials.

For more details: SICMES project

III Research Seminar of Cueva Pintada

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Last November 23, David Hernández López, from the TIDOP research group, exposed part of recent works carried in the cave “Cueva Pintada” of Galdar, Gran Canaria.

 

Around 30 assistants attended the III Research Seminar of the cave “Cueva Pintada” of Galdar in Gran Canaria. In the event, the researcher David Hernández López presented the results corresponding to the virtual digitization of the cave taken at the end of 2015. The digitalization consisted in the generation of a precise 3D model of high resolution through the use of different geomatic techniques such as laser scanning (phase-shift and triangulation) and photogrammetry. The combination of all the sensors used allowed to obtain a 3D model of each of the corners of the cave with millimetric precision and resolution.

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In addition to this digitalization, a virtual visit through high resolution immersive panoramas was generated. This virtual visit tour was connected to the 3D model of the cave with, so that a very valuable and useful tool was obtained not only for tourists but also for professionals and researchers working in the cave.

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These research works are part of the SIDAP project (Integral Archaeological and Heritage Documentation System).

For more details, please visit: Cueva_pintada

The HeritageCARE project has been included within the framework of the first European Year of Cultural Heritage

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The HeritageCARE research project, in which the TIDOP research group (University of Salamanca) participates, will be part of the 2018 European Cultural Heritage program.

 

Under the motto “Our heritage: where the past meets the future” the 2018 European Year of Cultural Heritage initiative aims to encourage people to discover the tangible and intangible Europe´s heritage and take on a commitment to preserve it. To this end, the exchange and appreciation of cultural heritage, awareness of history and common values ​​and the feeling of belonging to a common European area will be encouraged. The initiative will have the support and participation of all EU Member States as well as entities and research projects that promote heritage in Europe. Within these projects is the HeritageCARE project, which aims to implement a system of preventive conservation for the heritage of the SUDOE region (Spain, Portugal and southern France). Among the priorities of this project are the creation of a non-profit entity as well as a management system that will exploit the latest technological advances.

If you want to know more about this initiative you can consult: https://europa.eu/cultural-heritage/. Do not forget to check the latest news and developments of the HeritageCARE project (http://heritagecare.eu/) (Facebook_HeritageCARE)

TIDOP recieves the visit of the researcher Yuki Ogimoto

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The researcher Yuki Ogimoto from the Osaka Institute of Technology has developed a stay in the TIDOP laboratory

 

Yuki Ogimoto, a researcher from the Osaka Institute of Technology in Japan, has developed a pre-doctoral stay in the TIDOP Research Group during the months of November and December of 2017. During his stay, the civil engineer and urban planning designer has developed advances related to improvements in the design of sidewalks and other pavements. Specifically, his research line tries to clarify the relationship between the texture of the pavements and the mobility and or trajectory of pedestrians. The objective is to improve the current pavement designs so that the times invested by the walkers during their journeys is optimized. For this purpose, the researcher is committed to the computer vision as leading approach.

 

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Detail of the path followed by the pederastian according with the tyep of paviment presented on the road.

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Análisis termográfico de edificios

 

El uso de la termografía infrarroja comMapaEnergeticoo técnica sobradamente provada para la inspección de edificios y localización de patologías como fugas de aire, humedades, etc. Nos permite realizar un examen visual “in-situ” de calidad de los objetos de estudio gracias a la posibilidad de visualizar en tiempo real los resultados pudiendo detectar sin dificultad los desperfectos o elementos característicos de estos. Estas técnicas de medición cualitativa nos proporcionan la posibilidad de realizar inspecciones rápidas y eficaces sin contacto directo con el objeto y de forma no destructiva, lo que disminuye tanto el riesgo de incidentes para los operarios como los daños producidos en los propios objetos de estudio ocasionados por otras técnicas intrusivas. Además, también se ha demostrado la utilidad de la termografía infrarroja como técnica puramente de medida a través de su utilización para el cálculo de propiedades termofísicas de materiales tales como difusividad y transmitancia térmica.

En el caso de termografía cualitativa, las publicaciones existentes tratan de estudios realizados in-situ, principalmente en edificios históricos o elementos del patrimonio cultural, mientras que los estudios cualitativos se realizan, en la mayor parte de los casos, en laboratorios sobre muestras de tamaño limitado. En aquellos casos en los que se han realizado estudios termográficos cuantitativos sobre edificios in-situ, los valores de temperatura son empleados con el objetivo de obtener propiedades termofísicas (conductancia térmica) reales del cerramiento, sin embargo su distribución espacial no es considerada.

Conjugar ambas aplicaciones permitirá la automatización del cálculo de pérdidas de calor a partir de las temperaturas medidas con una cámara termográfica. De este modo, no solo se usa la termografía para representar el estado de la pared, sino que también se usan los valores de temperatura contenidos en la termografía para la extracción de parámetros métricos del edificio en estudio, por lo que la hibridación de la información termográfica con el material cartográfico de precisión permitiría extraer la geometría real del objeto de estudio con textura termográfica, pudiendo así realizar mediciones precisas de los elementos de interés directamente sobre el resultado obtenido.

 

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Estudios como el publicado por EuroACE en 2010 colocan la mejora de la eficiencia energética en edificación en cabeza de las acciones necesarias para la reducción de emisiones de gases del efecto invernadero y gasto energético, así como para servir de empuje a la generación de empleo. Especial es el caso del parque de edificios ya construidos, la mayoría procedente de los años 1940-80, con normativa inexistente y recursos escasos. En ellos las obras de rehabilitación energética pueden suponer un ahorro de hasta el 75% en consumo de energía. En España existen 13 millones de viviendas susceptibles de intervención, cuya rehabilitación energética supondría una reducción de las emisiones del sector del 34% con respecto al año 2001.

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Building thermographic analysis

 

 

The use of infraMapaEnergeticored thermography as a widely tested technique for building inspection and location of pathologies such as air leakage and moisture allows the performance of  quality “in-situ” visual examination of the objects under study due to the possibility of obtaining real-time results, being able to detect without difficulty damages or material characteristics. This qualitative measurement technique provides the capability of doing quick, effective and non-destructive inspection without direct contact with the object under study, decreasing the risk of incidents to operators and the damage of the objects comparing with other intrusive techniques. Furthermore, the utility of infrared thermography as a measurement technique has been proved by its use for the determination of the thermophysical properties of materials such as diffusivity and thermal transmittance.

In the qualitative approach, some authors have performed in-situ studies, mainly in historical buildings or cultural heritage elements, whereas quantitative studies are performed mainly in laboratories with limited size samples. In those cases where quantitative thermography studies were performed in-situ, temperature values were employed in order to obtain the real thermophysical properties (thermal conductance) of the building envelope, but their spatial distribution is not considered.

Combine both applications will enable the automation of the heat loss computation from the measured temperatures with a thermographic camera. Thus, the thermography is not only used to represent the state of the wall, but also temperature values represented on the thermography for extracting the metric parameters of the study object so the hybridization of the thermographic information with precise cartographic material would  allow to extract the actual geometry of the object of study with thermal texture, being able to make accurate measurements of the elements of interest directly on the obtained results.

 

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Studies such as the one published by EuroACE in 2010, places improved energy efficiency in building construction at the top of the list of actions that need to be taken to reduce greenhouse gases and energy costs, in addition to acting as a stimulus to generate employment. In particular is the case of existing buildings stock, most of which dates back to the period 1940-80, constructed using non-existent standards and scarce resources. Here, energy refurbishment works could represent a saving of up to 75% in energy consumption. In Spain there are 13 million homes that could be the subject of intervention, where energy refurbishment could result in a reduction in sector emissions of 34% compared to 2001.

 

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Mobile Laser System (MLS) applied to urban tree inventory

In urbanized Western Europe trees are considered an important component of the built-up environment. This also means that there is an increasing demand for tree inventories. Laser mobile mapping systems provide an efficient and accurate way to sample the 3D road surrounding including notable roadside trees. In this research line, a processing chain aiming at the extraction of tree locations and tree sizes from laser mobile mapping data is reached.

  • Vegetation extraction

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  • Tree parameter extraction

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Such steps, in combination with code optimization are expected to be sufficient to reach the final goal of automatized estimation of features sampled by mobile mapping at a rate that matches the acquisition speed and at a quality that matches the result of a human operator.

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