University of Salamanca takes part in the development of a land drone that automates the certification and quality control tasks in civil works

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TIDOP Research Group, within the framework of the AutoBIM project, has developed a land drone able to make the certification and quality control tasks of civil works in different construction stages

 

AutoBIM Project, in which the TIDOP Research Group together with Vias & Construcciones, Aplitop, Aplicad, Aimen Technologic Center and University of Vigo, has developed an innovative tool to certify civil works with much more accuracy and quality than traditional systems used up to now by the different construction and certification companies.

The main goal of the Project, funded by MINECO and CEE with around 1.000.000 €, is to develop a land drone that will automatically audit the current state of civil Works, and compare it with the initial or theoretical state it should be in.  For this purpose, the consortium has built a land drone armed with different last generation devices such as terrestrial laser scanner (TLS) for perform the three-dimensional radiography of the environment, several obstacle detectors and one route planner to enable self-orientation of the drone everywhere.

After the acquisition, all the captured information is processed by the software developed for this Project. It allows to compare the As-Built model (real state of the Works) with the BIM model (theoretical model projected).  The construction companies can undertake quality control and certification tasks faster and more flexible, having much more data than with the traditional systems of acquisition and certification.

For the test of, both the drone and the processing software, a pilot test was carried out in a civil work located in Badalona (Barcelona). The chosen site, was in different stages of construction, so there were areas of pillars, areas of vertical walls etc, so the drone had to be able to transit through the different scenarios autonomously and optimizing the three-dimensional model in each case.

The results of the pilot test were a success, both in terms of the navigation of the drone inside the civil work as well as what refers to the data obtained and the software for processing them.

The innovative system developed was presented at the Polytechnic School of Avila last March, with the assistance of every members of the consortium.

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The first year of the Catedra Iberdrola VIII Centennary

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The first year of the Catedra Iberdrola VIII Centennary

The research team of the Catedra Iberdrola VIII Centennary presents the results after the first year of performance of the project, where efforts have focused on the development of a tool for geospatial data, in Spatial Data Infrastructure format, that incorporates key information for the determination of the solar potential of surfaces such as roofs of both existing and new buildings, industrial constructions, and empty plots. 
The presentation of the results has been done in an event in the Dean of the University of Salamanca, Ricardo Rivero; the Vice Rector in Research and Transfer, Susana Santos; the Responsible for Innovation in Iberdrola, Agustín Delgado; and the Responsible for Smart Solutions in Iberdrola, Luis Buil. 
 
Further information about the event (in Spanish) in: 

The digitalization of the Historical Library of the University of Salamanca has begun thanks to the European project HeritageCARE

 

TIDOP Research Group digitizes the Historic Building of the University of Salamanca in 3D.

 

Equipped with a state-of-art equipment, researchers from the TIDOP (Information Technologies for Heritage Documentation) group have digitized the Historic Building of the University of Salamanca in 3D. This new sensor, which consists of a handheld laser scanner and a processing unit inside a backpack, has allowed the three-dimensional reconstruction of 10,000 m2 through a simple walk around the building. In addition, the size and portability of this sensor has allowed to recreate in 3D spaces of great value as the original “Cielo de Salamanca” which would not be possible through conventional laser scanning equipment.

This 3D model will serve as a geometric basis for the creation of the BIM model that will serve to carry out a preventive conservation of the Historical Library, thanks to the system of sensors installed by the Santa María la Real Foundation. This site stores a movable heritage of unforeseeable value where one of the manuscripts of The Book of Good Love stands out.

This pilot case is part of a more ambitious initiative: the HeritageCARE European research project, which aims to develop a system of preventive conservation of historic buildings based on the latest technological advances where the backpack will undoubtedly play a very important role.

Historic Building of the University of Salamanca

Colaboration in the Eramus + ‘ GET UP’ programme

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 Proffesors of the new degree in Geocomputing and Geomatics and researchers from TIDOP Research Group take part of the international research consortium GET UP

 

‘GET UP’ is the name of the new European initiative that is framed in the Erasmus + programme in which the University of Salamanca take part though the Degree in Engineering in Geocomputing and Geomatics and TIDOP Research Group of the Higher Polytechnic School of Ávila. The main goal is to rekindle and promote an entrepreneurial spirit throughout Europe  through the use of an online learning platform. The consortium head of the correct development of the project, is formed by the universities of LUISS Guido Carli (Italy), Aristotle of Thessaloniki (Greece), University of Salamanca (Spain), the official business and innovation center of the EU WESTBIC (Ireland), the software company SIG ESRI (Portugal) and the private service organization AidLearn (Portugal).

For more details about the project consult: http://getup-project.eu/index.html

New published on 21/06/2018
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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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Ventana modal ingles
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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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Miembro del grupo TIDOP

Lloyd A. Courtenay

Graduado en arqueología por la Universidad Complutense de Madrid. Actualmente está acabando un Máster en Arqueología del Cuaternario y Evolución Humana por la Universidad Rovira i Virgili, Tarragona, con el objetivo de seguir con su formación investigadora matriculándose en un programa de Doctorado en prehistoria para el próximo año académico. Habiéndose especializado en el campo de la tafonomía, trabaja principalmente en el estudio microscópico de los restos óseos que aparecen en los yacimientos arqueológicos y paleontológicos. Su principal campo de investigación está dirigido hacia la aplicación de nuevas metodologías en yacimientos del Pleistoceno Inferior Africano. En los últimos años ha emprendido su carrera profesional adaptando los nuevos avances estadísticos en otros campos como la Inteligencia Artificial, buscando maneras de aplicarlos al estudio del registro fósil. Siguiendo esta línea de investigación, ha conseguido desarrollar una serie de algoritmos aplicando métodos de Machine y Deep Learning para el procesado de datos derivados de modelos 3D. Con el diseño de algoritmos complejos como las Redes de Neuronas Artificiales y las Máquinas de Vectores de Soporte, ha desarrollado nuevos modelos estadísticos que pueden distinguir entre la actividad de diferentes carnívoros a través de las marcas de dientes que dejan. Estos modelos permiten también la clasificación de las alteraciones microscópicas halladas como producto de agentes naturales o por el contrario, si fueron consecuencia de las actividades de caza de los antiguos homínidos.

Líneas de investigación:

  • Tafonomía y zooarqueología aplicado al estudio del Pleistoceno Inferior
  • Desarrollo de nuevos métodos para el estudio microscópico de los restos fósiles
  • Diseño y aplicación de nuevos métodos estadísticos en la arqueología, incluyendo la aplicación de técnicas 3D para la documentación de restos óseos, y el uso de algoritmos de Inteligencia Artificial para procesar tales datos
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TIDOP Member

Lloyd A. Courtenay

An Archaeology graduate having studied in the Complutense University of Madrid, he is currently finishing his Master’s degree in Quaternary Archaeology and Human Evolution in the University Rovira I Virgili, Tarragona. Starting next academic year, he intends to continue his professional career by enrolling in a Doctoral programme in prehistory. Specialised in the field of taphonomy, he works primarily on the microscopic study of osteological materials found in archaeological and paleontological sites. His main field of research lies in the development of new methods for the study of Lower Pleistocene sites in Africa. Over the last couple of years, he has focused his research on the adaptation of new statistical advances from other fields of research, such as Artificial Intelligence, with the hope of finding new means of applying these techniques to the prehistoric fossil register. Through this line of research, he has achieved the development of Machine and Deep Learning algorithms for the processing of 3D data. His most notable advances have included the development of Artificial Neural Networks and Support Vector Machines for the differentiation of carnivore activity through the tooth marks animals may leave on bone. He has also achieved models that are able to successfully classify microscopic traces, discerning between natural agents and those produced by ancient hominids in prehistoric butchery practices.

Research lines:

  • Taphonomy and zooarchaeology applied to the Lower Pleistocene
  • Development of new methodological approaches for the study of fossil remains
  • Design and application of new statistical models for archaeological studies, including 3D modelling for the documentation of bone, and the use of Artificial Intelligence algorithms for the processing of this data
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Drones terrestres aplicados al modelizado tridimensional e inspección de infraestructuras críticas y de difícil acceso.

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Equipar drones con sensores láser, detectores de obstáculos y sistemas de control remoto permite obtener de forma segura y fiable los modelos tridimensionales de escenarios críticos, entendiendo como escenarios críticos todos aquellos escenarios en los que una persona correría peligro realizando los trabajos.

Este tipo de escenarios abarcan desde grutas angostas y estrechas a las que es difícil acceder, hasta escenarios industriales complejos, como subestaciones eléctricas, en las que existen riesgos de descargas eléctricas, salas de calderas, edificios con problemas estructurales etc.

A pesar de ser lugares críticos, su mantenimiento e inspección es un aspecto clave en el campo del control preventivo de averías y deformaciones, por lo que obtener el modelo tridimensional de estos lugares es fundamental. En este sentido, los drones terrestres, cada vez más sofisticados, permiten integrar escáner láser terrestre para capturar el entorno, asi como detectores de obstáculos y diferentes sistemas de comunicación, de modo que pueden moverse de forma autónoma o ser teledirigidos de forma remota.

Hasta el momento se ha investigado la integración de drones terrestres y escáner láser utilizando dos metodologías de trabajo diferentes, según el grado de precisión y detalle que se necesite y dependiendo de las dimensiones del espacio en el que se esté trabajando.

 

Finalmente, se está investigando la manera de combinar los modelos tridimensionales obtenidos por los drones terrestres con datos procedentes de drones aéreos equipados con cámaras fotográficas o cámaras termográficas. Combinar ambos modelos es esencial para obtener una cobertura total de la escena de estudio y poder detectar anomalías en cualquier lugar. Ésta línea de acción se está introduciendo para controlar subestaciones eléctricas y plantas solares fotovoltaicas ya que en ambos casos es posible detectar zonas con un calentamiento anormal que indiquen un funcionamiento que deberá revisarse.

 

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Land drones applied to three-dimensional modeling and control of complex industrial environments

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Land drones can be armed with different devices such as terrestrial laser scanner, obstacle detectors or remote control systems, in order to provide accurate 3D models of unattended or critical environments in a safe way.

Environments like narrow caves that are difficult to access, electrical substations where there are risk of electric shock, boiler rooms or buildings with structural problems are considered critical environments for human operators due to the danger they entail.

Despite being critical spaces, its maintenance, inspection and control are essential to prevent damages and detect breakdowns, so accurate three-dimensional models are indispensable. For this purpose, terrestrial drones allow the integration of terrestrial laser scanners to capture the environment, as well as obstacle detectors and different communication systems, so that they can be autonomous vehicles or remote-controlled vehicles.

Depending on the accuracy needed and the dimensions of the study case, two different  combinations of technologies have been explored, both combining laser scanner with land drones.

To complete this research line, we are working in different methodologies to combine 3D models obtained with land drones and data obtained with aerial drones equipped with conventional cameras or thermo graphic cameras.

Mix both kind of models make the three-dimensional model much more complete and it is possible to detect pathologies in almost everywhere.  Some of this process has been used with success in electrical substations and photovoltaic solar plants, detecting, for example, anomalies in some panels.

 

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