{"id":264,"date":"2015-10-19T22:00:00","date_gmt":"2015-10-19T20:00:00","guid":{"rendered":"https:\/\/www.extende.com\/blog\/ndt-net-technical-tip-to-focus-or-not-to-focus\/"},"modified":"2015-10-19T22:00:00","modified_gmt":"2015-10-19T20:00:00","slug":"ndt-net-technical-tip-to-focus-or-not-to-focus","status":"publish","type":"post","link":"https:\/\/www.extende.com\/fr\/blog\/ndt-net-technical-tip-to-focus-or-not-to-focus\/","title":{"rendered":"NDT.net technical tip: to focus or not to focus"},"content":{"rendered":"<p><a class=\"lien\" href=\"http:\/\/www.ndt.net\/myndt\/?id=67\">ED GINZEL<\/a>, retired consultant with Materials Research Institute, active member of the\u00a0<a class=\"lien\" href=\"http:\/\/www.ndt.net\/index.php\">NDT.NET<\/a>\u00a0community and\u00a0<span class=\"g-color1\">CIVA<\/span>\u00a0user, explains in a\u00a0<span class=\"g-color2\">technical tip<\/span>\u00a0 why a focused beam should not be used for general\u00a0<span class=\"g-color2\">weld inspection.<\/span><\/p>\n<\/p>\n<p>His demonstration based on\u00a0<span class=\"g-color1\">CIVA<\/span>\u00a0<span class=\"g-color1\">simulation<\/span>\u00a0can be downloaded\u00a0<a class=\"lien\" href=\"https:\/\/www.extende.com\/wp-content\/uploads\/tofocusornottofocus.pdf\">HERE<\/a>. It shows that the increase of sensitivity due to focusing is done at the expense of reducing sensitivity in the weld\/HAZ zone, thereby requiring the operator to use more receiver gain in the TCG construction in the region of interest. As a result of the increased beam spread that occurs after the focal point, there is reduced beam resolution.\u00a0 Therefore, closely spaced indications are more difficult to resolve.<\/p>\n<\/p>\n<p>This tip is open to discussion in the\u00a0<a class=\"lien\" href=\"http:\/\/www.ndt.net\/forum\/thread.php?msgID=60138\">NDT.NET FORUM<\/a>. Don\u2019t hesitate participating!<\/p>\n<\/p>\n<p>The EXTENDE&rsquo;s team<\/p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>ED GINZEL, retired consultant with Materials Research Institute, active member of the\u00a0NDT.NET\u00a0community and\u00a0CIVA\u00a0user, explains in a\u00a0technical tip\u00a0 why a focused beam should not be used for general\u00a0weld inspection. His demonstration based on\u00a0CIVA\u00a0simulation\u00a0can be downloaded\u00a0HERE. It shows that the increase of sensitivity due to focusing is done at the expense of reducing sensitivity in the weld\/HAZ [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":262,"comment_status":"","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[379],"tags":[],"class_list":["post-264","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-ndt-consulting-and-techniques"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/posts\/264","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/comments?post=264"}],"version-history":[{"count":0,"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/posts\/264\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/media\/262"}],"wp:attachment":[{"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/media?parent=264"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/categories?post=264"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.extende.com\/fr\/wp-json\/wp\/v2\/tags?post=264"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}