{"id":36123,"date":"2022-11-15T17:08:39","date_gmt":"2022-11-15T09:08:39","guid":{"rendered":"https:\/\/www.upowertek.com\/reduction-du-scintillement-clignotement-et-clignotement-pour-leclairage-sportif\/"},"modified":"2023-05-17T15:58:41","modified_gmt":"2023-05-17T07:58:41","slug":"reduction-du-scintillement-clignotement-et-clignotement-pour-leclairage-sportif","status":"publish","type":"post","link":"https:\/\/www.upowertek.com\/fr\/reduction-du-scintillement-clignotement-et-clignotement-pour-leclairage-sportif\/","title":{"rendered":"R\u00e9duction du scintillement (clignotement et clignotement) pour l&rsquo;\u00e9clairage sportif"},"content":{"rendered":"\n<p>Ceci est un tuteur vid\u00e9o o\u00f9 nous pouvons voir qu&rsquo;il y a un scintillement important et l&rsquo;auteur enseigne comment supprimer cela sur ce type de vid\u00e9os d&rsquo;\u00e9clairage sportif, mais cet article explique comment s&rsquo;assurer que les \u00e9diteurs vid\u00e9o n&rsquo;auront pas \u00e0 faire un tel post-cam\u00e9ra travailler en supprimant le scintillement \u00e0 l&rsquo;origine.<\/p>\n\n<div class=\"wp-block-media-text alignwide is-stacked-on-mobile\"><figure class=\"wp-block-media-text__media\"><\/figure><div class=\"wp-block-media-text__content\">\n<p><\/p>\n<\/div><\/div>\n\n          \n\n          <figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\">\n            <div class=\"wp-block-embed__wrapper\">\n<iframe title=\"Tutorial: Removing Flicker from Stadium Lights in Slow Motion Sports Videos\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/gQT4BmQy7G4?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div>\n          <\/figure>\n          \n\n        \n\n<div style=\"height:45px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Pourquoi le clignotement sur la vid\u00e9o se produit-il?<\/p>\n\n<p>D&rsquo;une mani\u00e8re g\u00e9n\u00e9rale, le clignotement peut \u00eatre capt\u00e9 par des cam\u00e9ras \u00e0 tr\u00e8s haute vitesse lorsque l&rsquo;ondulation lumineuse du stade est suffisamment importante. Comme nous savons que la lumi\u00e8re de sortie de la lumi\u00e8re LED est proportionnelle au courant LED, le clignotement ou le scintillement de la vid\u00e9o est finalement caus\u00e9 par l&rsquo;ondulation du courant de sortie du pilote LED.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"837\" height=\"457\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/forward-current.png\" alt=\"courant direct\" class=\"wp-image-18850\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/forward-current.png 837w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/forward-current-600x328.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/forward-current-300x164.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/forward-current-768x419.png 768w\" sizes=\"(max-width: 837px) 100vw, 837px\" \/><\/figure>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>L&rsquo;ondulation de sortie du pilote de LED peut \u00eatre class\u00e9e en deux parties\u00a0: l&rsquo;ondulation haute fr\u00e9quence et la basse fr\u00e9quence.<\/p>\n\n<h3 class=\"wp-block-heading\">Ondulation haute fr\u00e9quence.<\/h3>\n\n<p>Cette ondulation de courant est caus\u00e9e par le convertisseur de courant constant \u00e0 commutation \u00e9lev\u00e9e et la fr\u00e9quence peut \u00eatre de 75 \u00e0 200 kHz, ce qui est trop \u00e9lev\u00e9 pour que les cam\u00e9ras puissent l&rsquo;attraper. Donc, normalement, les concepteurs n&rsquo;ont pas \u00e0 s&rsquo;en soucier. Pour une conception de bonne qualit\u00e9, cette ondulation doit \u00e9galement \u00eatre faible pour garantir la dur\u00e9e de vie du condensateur de sortie.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"933\" height=\"252\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/the-output-capacitor-lifetime.png\" alt=\"la dur&#xE9;e de vie du condensateur de sortie\" class=\"wp-image-18852\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/the-output-capacitor-lifetime.png 933w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/the-output-capacitor-lifetime-600x162.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/the-output-capacitor-lifetime-300x81.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/the-output-capacitor-lifetime-768x207.png 768w\" sizes=\"(max-width: 933px) 100vw, 933px\" \/><\/figure>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h3 class=\"wp-block-heading\">Ondulation basse fr\u00e9quence.<\/h3>\n\n<p>L&rsquo;ondulation basse fr\u00e9quence est caus\u00e9e par la fluctuation de la tension alternative d&rsquo;entr\u00e9e dont la fr\u00e9quence est de 100 ou 120 Hz dans diff\u00e9rents pays. Dans cette gamme de fr\u00e9quences, il est facile, m\u00eame pour les cam\u00e9ras de t\u00e9l\u00e9phones portables normales, de capter le scintillement si l&rsquo;ondulation n&rsquo;est pas contr\u00f4l\u00e9e. C&rsquo;est le param\u00e8tre auquel tous les concepteurs doivent pr\u00eater attention. Le facteur de scintillement moyen du syst\u00e8me d&rsquo;\u00e9clairage doit \u00eatre inf\u00e9rieur \u00e0 5\u00a0% pour les stades d&rsquo;\u00e9lite de niveau A avec une capture vid\u00e9o au ralenti de moins de 300\u00a0ips, conform\u00e9ment au Guide d&rsquo;\u00e9clairage de stade 2016 de l&rsquo;Union europ\u00e9enne de football (UEFA).<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img decoding=\"async\" width=\"919\" height=\"388\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/low-frequency-ripple.png\" alt=\"ondulation basse fr&#xE9;quence\" class=\"wp-image-18856\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/low-frequency-ripple.png 919w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/low-frequency-ripple-600x253.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/low-frequency-ripple-300x127.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/low-frequency-ripple-768x324.png 768w\" sizes=\"(max-width: 919px) 100vw, 919px\" \/><\/figure>\n\n<div style=\"height:49px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>La question suivante est de savoir comment d\u00e9finir le facteur de scintillement.<\/p>\n\n<h2 class=\"wp-block-heading\">Facteur de scintillement<\/h2>\n\n<p>L&rsquo;IESNA (l&rsquo;Illuminating Engineering Society of North America) a publi\u00e9 la d\u00e9finition du \u00ab\u00a0pourcentage de scintillement\u00a0\u00bb et de l&rsquo;\u00ab\u00a0indice de scintillement\u00a0\u00bb dans la neuvi\u00e8me \u00e9dition du manuel d&rsquo;\u00e9clairage de l&rsquo;IESNA. La figure 1 montre comment les m\u00e9triques sont d\u00e9finies.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"455\" height=\"333\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/percent-flicke.png\" alt=\"pourcentage de scintillement\" class=\"wp-image-18858\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/percent-flicke.png 455w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/percent-flicke-300x220.png 300w\" sizes=\"(max-width: 455px) 100vw, 455px\" \/><\/figure>\n\n<div style=\"height:50px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Figure 1 D\u00e9finition de l&rsquo;indice de scintillement<\/p>\n\n<p>Le pourcentage de scintillement est une mesure relative de la variation cyclique de la sortie d&rsquo;une source lumineuse (c&rsquo;est-\u00e0-dire le pourcentage de modulation). Ceci est aussi parfois appel\u00e9 \u00ab indice de modulation \u00bb.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"247\" height=\"86\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2023\/02\/modulation-index-2.png\" alt=\"indice de modulation\" class=\"wp-image-42032\"\/><\/figure>\n\n<p><br\/>L&rsquo;indice de scintillement est une \u00ab\u00a0mesure relative fiable de la variation cyclique de la sortie de diverses sources \u00e0 une fr\u00e9quence de puissance donn\u00e9e. Il prend en compte la forme d&rsquo;onde de la sortie lumineuse ainsi que son amplitude \u00bb, selon le manuel. L&rsquo;indice de scintillement prend des valeurs de 0 \u00e0 1,0, avec 0 pour un flux lumineux stable. Des valeurs plus \u00e9lev\u00e9es indiquent une possibilit\u00e9 accrue de scintillement notable de la lampe, ainsi qu&rsquo;un effet stroboscopique.<br\/>Comme indiqu\u00e9 ci-dessus, en plus de la fr\u00e9quence, l&rsquo;indice de scintillement a un effet significatif sur la fa\u00e7on dont la lumi\u00e8re fait sentir les gens. Un indice de scintillement plus \u00e9lev\u00e9 signifie plus de sensibilit\u00e9 \u00e0 l&rsquo;\u0153il humain et un niveau de confort plus faible. Le tableau ci-dessous montre l&rsquo;indice de scintillement typique des diff\u00e9rents moteurs d&rsquo;\u00e9clairage. <\/p>\n\n<figure class=\"wp-block-table is-style-regular\"><table class=\"has-very-light-gray-to-cyan-bluish-gray-gradient-background has-background\"><thead><tr><th><\/th><th class=\"has-text-align-left\" data-align=\"left\">Max<\/th><th class=\"has-text-align-left\" data-align=\"left\">Min<\/th><th class=\"has-text-align-left\" data-align=\"left\">Avenue<\/th><th class=\"has-text-align-left\" data-align=\"left\">Vaciller%<\/th><th class=\"has-text-align-left\" data-align=\"left\">Indice de scintillement<\/th><\/tr><\/thead><tbody><tr><td>Incandescent<\/td><td class=\"has-text-align-left\" data-align=\"left\">12.180<\/td><td class=\"has-text-align-left\" data-align=\"left\">10.745<\/td><td class=\"has-text-align-left\" data-align=\"left\">11.460<\/td><td class=\"has-text-align-left\" data-align=\"left\">6.2594<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0194<\/td><\/tr><tr><td>100\u00a0W\u00a0MH<\/td><td class=\"has-text-align-left\" data-align=\"left\">9.1472<\/td><td class=\"has-text-align-left\" data-align=\"left\">3.2066<\/td><td class=\"has-text-align-left\" data-align=\"left\">6.5147<\/td><td class=\"has-text-align-left\" data-align=\"left\">48.088<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.1398<\/td><\/tr><tr><td>T12 Magn\u00e9tique<\/td><td class=\"has-text-align-left\" data-align=\"left\">9.6281<\/td><td class=\"has-text-align-left\" data-align=\"left\">4.6256<\/td><td class=\"has-text-align-left\" data-align=\"left\">7.1565<\/td><td class=\"has-text-align-left\" data-align=\"left\">35.096<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0897<\/td><\/tr><tr><td>T5HO Elec<\/td><td class=\"has-text-align-left\" data-align=\"left\">10.52<\/td><td class=\"has-text-align-left\" data-align=\"left\">9.960<\/td><td class=\"has-text-align-left\" data-align=\"left\">10.20<\/td><td class=\"has-text-align-left\" data-align=\"left\">2.734<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0036<\/td><\/tr><tr><td>LED \u00e0 CC<\/td><td class=\"has-text-align-left\" data-align=\"left\">43.4<\/td><td class=\"has-text-align-left\" data-align=\"left\">41.0<\/td><td class=\"has-text-align-left\" data-align=\"left\">42.2<\/td><td class=\"has-text-align-left\" data-align=\"left\">2.84<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0037<\/td><\/tr><tr><td>LED avec scintillement<\/td><td class=\"has-text-align-left\" data-align=\"left\">15.996<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.0555<\/td><td class=\"has-text-align-left\" data-align=\"left\">6.3026<\/td><td class=\"has-text-align-left\" data-align=\"left\">99.309<\/td><td class=\"has-text-align-left\" data-align=\"left\">0.4498<\/td><\/tr><\/tbody><\/table><\/figure>\n\n<div style=\"height:52px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Trouver le param\u00e8tre et le bon produit<\/h2>\n\n<p>La d\u00e9finition du courant d&rsquo;ondulation uPowerTek est ci-dessous\u00a0:<\/p>\n\n<p>Courant d&rsquo;ondulation = ondulation basse fr\u00e9quence + ondulation haute fr\u00e9quence<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"986\" height=\"417\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/upowertek-ripple-current.png\" alt=\"courant d'ondulation upowertek\" class=\"wp-image-18862\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/upowertek-ripple-current.png 986w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/upowertek-ripple-current-600x254.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/upowertek-ripple-current-300x127.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/upowertek-ripple-current-768x325.png 768w\" sizes=\"(max-width: 986px) 100vw, 986px\" \/><\/figure>\n\n<div style=\"height:47px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<p>Et ce param\u00e8tre peut \u00eatre trouv\u00e9 \u00e0 partir de la fiche technique du produit uPowerTek normalement page 3.<\/p>\n\n<figure class=\"wp-block-image aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"913\" height=\"55\" src=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/uPowerTek-product-datasheet3.png\" alt=\"fiche produit upowertek3\" class=\"wp-image-18864\" srcset=\"https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/uPowerTek-product-datasheet3.png 913w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/uPowerTek-product-datasheet3-600x36.png 600w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/uPowerTek-product-datasheet3-300x18.png 300w, https:\/\/www.upowertek.com\/wp-content\/uploads\/2022\/11\/uPowerTek-product-datasheet3-768x46.png 768w\" sizes=\"(max-width: 913px) 100vw, 913px\" \/><\/figure>\n\n<div style=\"height:48px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n<h2 class=\"wp-block-heading\">Sommaire<\/h2>\n\n<p>L&rsquo;absence de scintillement est essentielle pour l&rsquo;\u00e9clairage sportif et chaque luminaire qualifi\u00e9 doit \u00eatre enti\u00e8rement examin\u00e9 par un test de scintillement. Choisir les bons pilotes LED avec moins de 5 % de courant d&rsquo;ondulation est le bon travail \u00e0 faire pendant la phase de conception.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ceci est un tuteur vid\u00e9o o\u00f9 nous pouvons voir qu&rsquo;il y a un scintillement important et l&rsquo;auteur enseigne comment supprimer cela sur ce type de vid\u00e9os d&rsquo;\u00e9clairage sportif, mais cet article explique comment s&rsquo;assurer que les \u00e9diteurs vid\u00e9o n&rsquo;auront pas \u00e0 faire un tel post-cam\u00e9ra travailler en supprimant le scintillement \u00e0 l&rsquo;origine. Pourquoi le clignotement [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":36143,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"","_seopress_titles_desc":"","_seopress_robots_index":"","_seopress_robots_follow":"","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"none","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"Distributeur 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