63 research outputs found
Feasibility analysis of energy harvesting with piezoelectric devices in oceano graphic buoys
This document shows the study carried out to demonstrate the feasibility of using piezoelectric devices in oceanographic buoys, as generators of electric power for feeding the buoy system. One of the basic problems in an application of this type is to supply electrical power to the systems of the buoy. But the realisation of prototypes and especially their test in real conditions, for their validation, are extremely expensive. Therefore, a good solution is to demonstrate, previously, the viability of the system. This requires real data on movements, accelerations, etc., but in this particular case, these data are available for carrying out previous R & D projects that have given rise to developments that are currently located on operational oceanographic buoys. . With all this we have been able to carry out a study that demonstrates the interest of this technology.Peer Reviewe
A Multi-Point Sensor Based on Optical Fiber for the Measurement of Electrolyte Density in Lead-Acid Batteries
This article describes a multi-point optical fiber-based sensor for the measurement of electrolyte density in lead-acid batteries. It is known that the battery charging process creates stratification, due to the different densities of sulphuric acid and water. In order to study this process, density measurements should be obtained at different depths. The sensor we describe in this paper, unlike traditional sensors, consists of several measurement points, allowing density measurements at different depths inside the battery. The obtained set of measurements helps in determining the charge (SoC) and state of health (SoH) of the battery
Programa intensivo ERASMUS: TOPCART. Documentación Geométrica del Patrimonio (memoria de actividades 2010-2011)
[EN] Data contained in this record come from the following accademic activity (from which it is possible to locate additional records related with the Monastery):● LDGP_inv_002: "Intensive Program ERASMUS: TOPCART. Geometric Documentation of the Heritage (administrative and academic documentation)", http://hdl.handle.net/10810/9906[ES] Los datos de este registro provienen de la una actividad académica que también aparece descrita en el repositorio y desde donde se puede acceder a otros trabajos relacionados con el Monasterio:● LDGP_inv_002: "Programa intensivo ERASMUS: TOPCART. Documentación Geométrica del Patrimonio (documentación administrativa y académica)", http://hdl.handle.net/10810/9906[EN] The main objective this project is looking for is the exchange of practical methodologies, in topics related with the measure and representation of heritage, between teachers and specially students from different countries.
For the achievement of this aim we expect the participation of a group of about 30 students and 8 lecturers from Germany, Italy, Greece, Lithuania and Spain.Activities will be focused on the development of concrete projects in documentation of heritage, specifically in the San Prudencio Monastery (La Rioja, Spain). In this site, digital techniques for the acquisition of geometric information from GPS equipment, surveying total stations, laser scanner and photogrammetry systems, will be put into practice.Obtained data will be processed as follows: first of all, they will be documented by adding necessary metadata in order to ensure their use in the future, then, they will be treated to obtain cartographic representations and virtual models which can be distributed on the Internet.As results we expect: metric data of the monument, graphic models for difussion and collaboration partnertships.[ES] El objetivo principal que se persigue en este proyecto es el intercambio de metodolĂłgico práctico, en materias afines a la medida y la representaciĂłn del patrimonio, entre profesores y fundamentalmente alumnos, de diferentes paĂses. Para la consecuciĂłn de este fin se espera la participaciĂłn de un grupo de aproximadamente 25 alumnos y 8 profesores de (Alemania, Italia, Grecia, Lituania y España).Las actividades se centrarán en el desarrollo de proyectos concretos de documentaciĂłn de elementos patrimoniales, en concreto el apartado práctico se desarrollará en el Monasterio de San Prudencio (La Rioja, España). En el se aplicarán tĂ©cnicas digitales de registro de informaciĂłn geomĂ©trica, constituidas por receptores GPS, estaciones totales topográficas, escáneres láser y sistemas fotogramĂ©tricos.Los datos obtenidos serán tratados de la siguiente manera: en primer lugar serán documentados, mediante la adiciĂłn de la metainformaciĂłn necesaria para garantizar su utilidad a lo largo del tiempo, seguidamente serán procesados con el fin de obtener las representaciones cartográficas y modelos virtuales de representaciĂłn que puedan ser difundidas por medio de Internet.Como resultados se pretenden: un conjunto de registros mĂ©tricos del momento de la intervenciĂłn, modelos gráficos de difusiĂłn y finalmente relaciones de colaboraciĂłn interpersonal e interinstitucional.European Commission, DG Education and Culture (Erasmus 2009-1-ES1-ERAIP-0013, 2010-1-ES1-ERA10-0024); Organismo AutĂłnomo Programas Educativos Europeos (OAPEE); Gobierno de La Rioja (Spain); Universidad de La Rioja; Clavijo City Council; Logroño City Council; Ilustre Colegio de Ingenieros TĂ©cnicos en TopografĂa (DelegaciĂłn de La Rioja)[ES] Memoria de proyecto (PDF) [es el Ăşltimo fichero de la lista, el enlace directo es https://addi.ehu.es/bitstream/10810/7053/1053/ldgp_mem011-1_Clavijo_SanPrudencio.pdf] + 11 imágenes de la visita preliminar en abril de 2009, en formato JPEG + 19 nubes de puntos en formato txt (comprimido en ZIP junto a un fichero de metadatos y una imagen que sirve de croquis y que tambiĂ©n se presenta suelta) + 27 fotografĂas tomadas desde un helicĂłptero radicontrolado en 2011 por el grupo H (JPEG) + 18 fotografĂas mĂ©tricas del edificio en forma de -L- tomadas desde el Sur + 13 fotografĂas mĂ©tricas del edificio en forma de -L- tomadas desde el Este + 95 fotografĂas mĂ©tricas del interior del edificio en forma de -L- (JPEG) + 35 fotografĂas mĂ©tricas tomadas desde el cerro que se encuentra al sur (JPEG) + 8 fotografĂas mĂ©tricas que forman 4 pares estereoscĂłpicos (2 del grupo B y 2 del grupo D) (JPEG) + 183 fotografĂas mĂ©tricas que forman 91 tripletas (grupos B, C y D) (JPEG). [NOTA: este registro no está cerrado, se irán incorporando nuevos materiales de forma progresiva][EN] General report (PDF) [it is the last file of the list, the direct link is https://addi.ehu.es/bitstream/10810/7053/1053/ldgp_mem011-1_Clavijo_SanPrudencio.pdf] + 11 pictures taken during the preliminary visit in April 2009 (JPEG format) + 19 point clouds in plain text (compressed in a ZIP file together with a file with metadata and an image PNG as sketch, these image are also presented on their own) + 27 photographs taken from a remote-controlled helicopter for the group H in 2011(JPEG) + 18 metric pictures of the L-shaped building taken from the South (JPEG) + 13 metric pictures of the L-shaped building taken from the East (JPEG) + 95 metric pictures of the inside part of the L-shaped building (JPEG) + 35 metric photographs taken from the hill opposite in the Southern + 8 metric photographs in four stereopairs (2 from group B and 2 from group D) (JPEG) + 183 metric photographs arranged in 91 triplets from groups B, C and D (JPEG). [NOTE: this record is not closed, more data will be uploaded progressively
Food Habits of the Great Horned Owl (bubo Virginianus) in the Cape Region of Lower California, Mexico
Fiabilidad de componentes electrĂłnicos: La nueva RIAC-HDBK-217Plus
En este artĂculo se expone la metodologĂa seguida por la nueva norma RIAC-HDBK- 217Plus, elaborada por el RIAC (Reliability Information Analysis Center) para la predicciĂłn de fiabilidad de componentes, circuitos y sistemas electrĂłnicos. Esta nueva norma, que está basada en la experiencia acumulada y publicada en mayo de 2006, pretende sustituir a la muy conocidad MILHDBK- 217F, cuya Ăşltima actualizaciĂłn es de 1995
EvaluaciĂłn de Incertidumbres de Medida en las Curvas de CalibraciĂłn de los Sensores de Medida
Improving the performance of incremental encoders with conditioning circuits based on FPGA
Resolution in QCM Sensors for the Viscosity and Density of Liquids: Application to Lead Acid Batteries
sensor
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