<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>2007-7858</journal-id>
<journal-title><![CDATA[CienciaUAT]]></journal-title>
<abbrev-journal-title><![CDATA[CienciaUAT]]></abbrev-journal-title>
<issn>2007-7858</issn>
<publisher>
<publisher-name><![CDATA[Universidad Autónoma de Tamaulipas]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2007-78582014000200068</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Prueba de calidad en la superficie reflectora de un concentrador solar de canal parabólico con el uso de luz estructurada]]></article-title>
<article-title xml:lang="en"><![CDATA[Quality test to the parabolic trough solar collector surface using structured light]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Moreno-Oliva]]></surname>
<given-names><![CDATA[Víctor Iván]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Román-Hernández]]></surname>
<given-names><![CDATA[Edwin]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Rafael-Esesarte]]></surname>
<given-names><![CDATA[Sergio Arturo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García-Hernández]]></surname>
<given-names><![CDATA[Rommel]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad del Istmo Campus Tehuantepec ]]></institution>
<addr-line><![CDATA[Sto. Domingo Tehuantepec Oaxaca]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2014</year>
</pub-date>
<volume>8</volume>
<numero>2</numero>
<fpage>68</fpage>
<lpage>72</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2007-78582014000200068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2007-78582014000200068&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2007-78582014000200068&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Actualmente, existe un gran interés en el estudio de los sistemas de concentración de radiación solar para el aprovechamiento de este recurso. Diversas geometrías, puntuales, lineales y de no enfoque, han sido usadas para la concentración de radiación solar. La cantidad de energía recolectada por estos sistemas es sensible a deformaciones en la superficie reflectora, por lo que se ha vuelto imprescindible el desarrollo de técnicas para el control de calidad. En este trabajo se desarrolló una técnica óptica basada en el método de triangulación láser, para la cual se utilizó la proyección de una línea de luz láser sobre la superficie a evaluar, una cámara perpendicular a un plano de referencia y el objeto de estudio. La técnica consiste en asociar los desplazamientos laterales de la línea láser, observados por la cámara, con los cambios de altura del objeto respecto al plano de referencia, a partir de un modelo matemático. Para conseguir una reconstrucción digital del objeto completo se realizó un barrido o escaneo de la línea proyectada sobre el objeto de prueba. Usando este método, se evaluó la superficie reflectora de un prototipo de concentrador solar de canal parabólico de 1 250 mm de longitud en su apertura y 914 mm de longitud de canal. Como resultado se obtuvo la forma real de la superficie del colector, lo que permitió calcular el foco real del mismo. Además, el rango de diferencias entre la superficie real y la superficie que mejor se ajusta fue del orden de ± 10 mm. A partir de los resultados, se concluye que esta técnica puede aplicarse a la mejora en los procesos de manufactura de sistemas de concentración solar. La técnica puede ser adaptable para la evaluación de pequeños objetos, obteniéndose alta sensibilidad en el eje Z.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Currently, there is considerable research on the study of solar collection systems to take full advantage of this resource. Several geometries, such as point-like, linear and nonfocus, have been used for the concentration of solar radiation. Solar radiation concentrated by this system is sensitive to deformations on the reflecting surface. Therefore, several techniques of optical testing for quality control of the reflecting surface have been developed. In this work we developed an optical technique based on a laser triangulation method that used the projection of a laser beam onto the surface to be evaluated, a camera placed perpendicular to a reference plane, and the object under study. The technique associates lateral displacements of the laser beam, observed by the camera, with changes in height of the object relative to the reference plane, using a mathematical model. To obtain a digital reconstruction of the whole object, we scanned it using the projected beam. Through this method we evaluated the reflecting surface of a parabolic trough solar concentrator prototype with a 1 250 mm opening and 914 mm trough. As result, we obtained the real shape of the collector surface, which allowed calculating its real focus. Furthermore, the range of differences between the real and the best fit surface was approximately ± 10 mm. From this results, we concluded that the technique can be applied to improve the manufacturing processes of solar concentrating systems. The technique can be adapted to evaluate small objects with high sensitivity in the Z axis.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[Concentradores solares]]></kwd>
<kwd lng="es"><![CDATA[pruebas ópticas]]></kwd>
<kwd lng="es"><![CDATA[óptica geométrica]]></kwd>
<kwd lng="en"><![CDATA[Solar collectors]]></kwd>
<kwd lng="en"><![CDATA[optical testing]]></kwd>
<kwd lng="en"><![CDATA[geometrical optics]]></kwd>
</kwd-group>
</article-meta>
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