{"id":112127,"date":"2018-03-11T10:39:00","date_gmt":"2018-03-11T10:39:00","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/optimizacion-de-excitaciones-multi-canal-en-banda-ancha-para-colimar-haces-ultrasonicos-a-bajo-coste-mediante-sistemas-de-difraccion-limitada\/"},"modified":"2018-03-11T10:39:00","modified_gmt":"2018-03-11T10:39:00","slug":"optimizacion-de-excitaciones-multi-canal-en-banda-ancha-para-colimar-haces-ultrasonicos-a-bajo-coste-mediante-sistemas-de-difraccion-limitada","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/fisica\/optimizacion-de-excitaciones-multi-canal-en-banda-ancha-para-colimar-haces-ultrasonicos-a-bajo-coste-mediante-sistemas-de-difraccion-limitada\/","title":{"rendered":"Optimizaci\u00f3n de excitaciones multi-canal en banda ancha para colimar haces ultras\u00f3nicos a bajo coste mediante sistemas de difracci\u00f3n limitada"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Luis Alberto Castellanos Rivera <\/strong><\/h2>\n<p>Ucm-facultad de ciencias f\u00edsicas dpto. Dacya  titulo de la tesis: optimizaci\u00f3n de excitaciones multi-canal en banda ancha para colimar haces ultras\u00f3nicos a bajo coste mediante sistemas de difracci\u00f3n limitada  alumno: luis alberto castellanos rivera   resumen  el estudio de las ondas de difracci\u00f3n limitada est\u00e1 motivado principalmente por sus aplicaciones en sistemas de inspecci\u00f3n ac\u00fasticos que requieran de alta resoluci\u00f3n con una alta tasa de im\u00e1genes por segundo. Estas soluciones te\u00f3ricas, fuero n encontradas por j. A. Stratton en 1941, para la ecuaci\u00f3n escalar de ondas en medios isotr\u00f3picos y homog\u00e9neos; y fueron implementadas por primera vez en la ac\u00fastica por d. K. Hsu en 1989, para transductores de tipo bessel.  un tipo particular de ond a de difracci\u00f3n limitada es la onda x, descubierta por j. Y. Lu y j. F. Greenleaf, en 1991; mostrando diversas aplicaciones en el campo de los ultrasonidos. Te\u00f3ricamente, las ondas x producidas por aperturas infinitas se propagan indefinidamente sin cambiar su patr\u00f3n de forma en el espacio. En la pr\u00e1ctica, las ondas x han sido aproximadas con aperturas finitas, usando transductores de tipo array anular. Sin embargo, la generaci\u00f3n de ondas x en tiempo real es tecnol\u00f3gicamente cara, debido a que s e requiere de un arreglo electr\u00f3nico especializado y voluminoso para generar los pulsos de excitaci\u00f3n.  el principal objetivo de la presente tesis, es el presentar una metodolog\u00eda para simplificar el arreglo experimental necesario en la generaci\u00f3n de  ondas de difracci\u00f3n limitada. La idea principal es aproximar las excitaciones el\u00e9ctricas te\u00f3ricas, obtenidas de la soluci\u00f3n de onda x te\u00f3rica, a pulsos de morfolog\u00eda rectangular, m\u00e1s simples. Este tipo de formas de onda han sido implementadas con un  bajo costo por medio de circuitos de electr\u00f3nica anal\u00f3gica<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Optimizaci\u00f3n de excitaciones multi-canal en banda ancha para colimar haces ultras\u00f3nicos a bajo coste mediante sistemas de difracci\u00f3n limitada<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Optimizaci\u00f3n de excitaciones multi-canal en banda ancha para colimar haces ultras\u00f3nicos a bajo coste mediante sistemas de difracci\u00f3n limitada <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Luis Alberto Castellanos Rivera <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Complutense de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 20\/12\/2011<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Antonio Ramos Fernandez<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Jes\u00fas manuel De la cruz Garc\u00eda <\/li>\n<li>h\u00e9ctor Cal\u00e1s del castillo (vocal)<\/li>\n<li>Carlos Fritsch yusta (vocal)<\/li>\n<li>tomas Gomez alvarez arenas (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Luis Alberto Castellanos Rivera Ucm-facultad de ciencias f\u00edsicas dpto. Dacya titulo de la tesis: optimizaci\u00f3n de excitaciones [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-gradient":""}},"footnotes":""},"categories":[986,199],"tags":[84775,83016,223204,10620,223203,57517],"class_list":["post-112127","post","type-post","status-publish","format-standard","hentry","category-complutense-de-madrid","category-fisica","tag-antonio-ramos-fernandez","tag-carlos-fritsch-yusta","tag-hector-calas-del-castillo","tag-jesus-manuel-de-la-cruz-garcia","tag-luis-alberto-castellanos-rivera","tag-tomas-gomez-alvarez-arenas"],"_links":{"self":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/112127","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/comments?post=112127"}],"version-history":[{"count":0,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/posts\/112127\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/media?parent=112127"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/categories?post=112127"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.deberes.net\/tesis\/wp-json\/wp\/v2\/tags?post=112127"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}