Miguel Angel Pérez, Rocío Muñiz, Cristina de la Torre, Beatriz Garcia, Carlos Enrique Carleos, Raúl Crespo, Luis M. Cárcel
This paper presents a system for monitoring several parameters during alcoholic fermentation in wine industry. Alcoholic fermentation of grape juice is a quite complex biological process that involves a large number of variables and boundary conditions. The number of cells and total production of carbon dioxide are two important parameters for monitoring this process and several decisions must be carried out depending on these values. This paper presents an on-line application of impedance spectrometry to estimate both, CO 2 and cells in a small-scale fermentation plant. Experimental results...
XIX IMEKO World Congress
· TC23
· 2009
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Beatriz Garcia, Jesús Angel Baro, Cristina de la Torre, Rocío Muñiz, Miguel Angel Pérez
The tool of immunological diagnosis denominated ELISA (Enzyme Linked Immuno-Sorbent Assay) it is probably the most used colorimetric test and it evaluates the compatibility antigen-antibody. The development of a portable device and low cost that it is allows analyzing the ELISA plate ("in situ"). It will suppose one immediately identification of the disease and therefore a faster performance to palliate this disease. In addition to the being to low cost it will be more accessible for the population, especially of the underdeveloped countries population, where they have a depressed...
XIX IMEKO World Congress
· TC13
· 2009
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Cristina de la Torre, Rocío Muñiz, Miguel Angel Pérez
This paper presents a new kind of colour sensor based in measurement the three channels of RGB colour space, using bifurcated optical fibres to conduct light from illuminant to liquid under test and from liquid to photo sensor. This kind of colorimeter can be applied to wine industry in despite of using different colour space in relation to traditional methods. This paper shows a brief description of colour measurement process, a prototype implementation and several experimental results to compare their results to colour data from commercial equipment, and to verify its applicability to wine...
XIX IMEKO World Congress
· TC23
· 2009
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Gelson M. Rocha, R. P. Landim
The aim of this paper is to present a pioneer technical course in metrology in the Latin America. In the 90's, Brazil started to open its market to the world. Qualified human resources in metrology were needed and they were not available enough. A metrology technical course was established in 1998 by agreement among the National Institute of Metrology, Normalization and Industrial Quality (Inmetro), the General Office of Education of the Rio de Janeiro State (SEE-RJ) and the secondary school "Colégio Estadual Círculo Operário" (CECO), maintained by the government of the State of Rio de...
XIX IMEKO World Congress
· TC1
· 2009
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Eduardo Costa Silva, Luiz Gusmão, Carlos Hall Barbosa, Elisabeth Costa Monteiro
The Laboratory of Biometrology of PUC-Rio has been developing magnetic field transducers to be used in biomedical applications. Investigations recently accomplished indicate the possibility of a new research line, which considers the changes in the phase characteristics of Giant Magnetoimpedance (GMI) sensors due to varying low-intensity magnetic fields. In spite of being less explored in the literature, the work carried out so far indicates that the sensitivity of the phase can lead to more promising results than the ones already obtained with transducers based on the variation of the...
XIX IMEKO World Congress
· TC13
· 2009
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Nuno Rodrigues, Paulo Gomes, Eduardo Fernandes, Carlos Pedro Ferreira, João Sampaio
The monitoring of air pollution and air emissions has suffered a great evolution during last decade in Portugal. In relation with this evolution, the necessary metrological control for the measurement equipments increased substantially, as required from the European Norm EN ISO/IEC 17025. This work compares two alternative methodologies to calibrate equipments for monitoring air pollutants emitted from ducts and stacks to the atmosphere. The traditional method, by comparing the calibration gases, Certified Reference Materials (CRM) with the equipment measurements and other method that...
XIX IMEKO World Congress
· TC19
· 2009
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Jacopo Zenzeri, Vishwanathan Mohan, Pietro Morasso
In this paper, we present a biomimetic, force field based computational model for whole body reaching (WBR) using the approach known as passive motion paradigm. The proposed computational model is based on non-linear attractor dynamics where the attractor landscape is obtained by combining multiple force fields in different reference systems. Simulation results for a range of reaching tasks using a simplified body model composed of 5 joints (Ankle-Knee-Hip-Shoulder-Elbow) are presented. We compare the model-generated patterns (final posture, velocity profile and trajectories in the...
XIX IMEKO World Congress
· TC18
· 2009
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Roberto Montanini, Salvina Aliquò
Lock-in and pulse phase infrared thermography measurement techniques have been exploited for quantitative assessment of subsurface defects in a reference specimen made of Plexiglas. Radiometric thermal images were post-processed using a contrast approach in the frequency domain, allowing defect depth location to be resolved with a relative combined standard uncertainty of about 7% for thicknesses above 3 mm. Conversely, significant radial heat diffusion next to the boundary of the discontinuity made accurate sizing of deeper subsurface defects more difficult. The obtained results demonstrate...
XIX IMEKO World Congress
· TC12
· 2009
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Roberto Montanini, Gaetano Squadrito, Giosue Giacoppo
The achievement of a proper and uniform pressure distribution between the membrane electrode assembly (MEA) and the bipolar plates of a proton exchange membrane fuel cell (PEMFC) is a key factor of stack design and assembly. Contact pressure levels are usually controlled by selecting an appropriate external clamping pressure on the endplates. Very few studies have been focused on the measurement of the contact pressure distribution within the fuel cell and its correlation with the applied external clamping torque. This study explores the possibility of using matrix-based piezoresistive...
XIX IMEKO World Congress
· TC16
· 2009
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Joel de Jesus Lima Sousa, Luiz Torres Sá Leitão
This work presents a method to evaluate measurement results of calibrations of an itinerary energy standard (Wh) performed by laboratories that participate in an interlaboratorial comparison program. It is based in the methodology of linearization of the normal function distribution. This tool compares data of a laboratory under analysis to data of the reference laboratory using beta values of each laboratory within a specific period of the program. If any of these measures is outside stipulated ranges it is a sign that the laboratory under analysis needs to investigate its process.
XIX IMEKO World Congress
· TC8
· 2009
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