{"id":2401,"date":"2017-07-25T08:58:47","date_gmt":"2017-07-25T06:58:47","guid":{"rendered":"http:\/\/ist.blogs.inra.fr\/afs\/?p=2401"},"modified":"2017-07-25T08:58:47","modified_gmt":"2017-07-25T06:58:47","slug":"the-use-of-the-first-industrial-x-ray-ct-scanner-increases-the-lumber-recovery-value","status":"publish","type":"post","link":"https:\/\/ist.blogs.inrae.fr\/afs\/2017\/07\/25\/the-use-of-the-first-industrial-x-ray-ct-scanner-increases-the-lumber-recovery-value\/","title":{"rendered":"The use of the first industrial X-ray CT scanner increases the lumber recovery value: &#8230;"},"content":{"rendered":"<script type='text\/javascript' src='https:\/\/d1bxh8uas1mnw7.cloudfront.net\/assets\/embed.js'><\/script><h2 class=\"ArticleTitle\">&#8230;case study on visually strength-graded Douglas-fir timber.<\/h2>\n<p><strong class=\"EmphasisTypeBold \">Industrial computed tomography scanning of logs provides detailed information on timber quality prior to sawing. A sawing simulation\u2014considering log rotation angle and knot size accuracy\u2014revealed an average value increase of up to 20% for the best angle compared to the conventional horns-up position. <\/strong><\/p>\n<div id=\"attachment_2402\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/01-Douglas-fir-experimental-plot.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2402\" class=\"size-medium wp-image-2402\" src=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/01-Douglas-fir-experimental-plot-300x201.jpg\" alt=\"\" width=\"300\" height=\"201\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/01-Douglas-fir-experimental-plot-300x201.jpg 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/01-Douglas-fir-experimental-plot-768x514.jpg 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/01-Douglas-fir-experimental-plot-1024x685.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-2402\" class=\"wp-caption-text\">Douglas-fir experimental plot. Picture copyright Andreas Rais<\/p><\/div>\n<h3 class=\"Heading\">Keywords<\/h3>\n<p><span class=\"Keyword\">Breakdown optimization, <\/span><span class=\"Keyword\">Wood scanning, <\/span><span class=\"Keyword\">Log grading, <\/span><span class=\"Keyword\">Wood quality, <\/span><span class=\"Keyword\">Cutting pattern, Rotation angle<\/span><\/p>\n<p id=\"Par6\" class=\"Para\"><em><strong class=\"EmphasisTypeBoldItalic \">Context <\/strong><\/em>Computed tomography (CT) scanning has the potential to improve the value of products sawn from logs and meets the increasing demands of the wood industry for detailed information on log quality prior to processing. <em><strong class=\"EmphasisTypeBoldItalic \">Aims <\/strong><\/em>In a validation step, automated measurements of knot cluster variable DAB (DIN 4074-1:<span class=\"CitationRef\"><a title=\"View reference\" role=\"button\" href=\"https:\/\/link.springer.com\/article\/10.1007\/s13595-017-0630-5#CR11\">2012<\/a><\/span>-06) using CT were compared with manual measurements. In a second optimization step, the hypothesis that the value of the sawn products is increased by sawing at the best rotation angle as opposed to the horns-up position was tested.<\/p>\n<div id=\"attachment_2405\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/04-Douglas-fir-log.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2405\" class=\"wp-image-2405 size-medium\" src=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/04-Douglas-fir-log-300x224.jpg\" alt=\"\" width=\"300\" height=\"224\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/04-Douglas-fir-log-300x224.jpg 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/04-Douglas-fir-log-768x574.jpg 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/04-Douglas-fir-log-1024x765.jpg 1024w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-2405\" class=\"wp-caption-text\">Douglas-fir log.Picture copyright Andreas Rais<\/p><\/div>\n<div id=\"attachment_2406\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/05-CT-Log-from-Microtec.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2406\" class=\"wp-image-2406 size-medium\" src=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/05-CT-Log-from-Microtec-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/05-CT-Log-from-Microtec-300x200.jpg 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/05-CT-Log-from-Microtec-768x511.jpg 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/05-CT-Log-from-Microtec-1024x682.jpg 1024w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/05-CT-Log-from-Microtec.jpg 1920w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-2406\" class=\"wp-caption-text\">Picture copyright Andreas Rais<\/p><\/div>\n<div id=\"attachment_2407\" style=\"width: 310px\" class=\"wp-caption alignnone\"><a href=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/06-Band-sawing-Douglas-fir-log.jpg\"><img loading=\"lazy\" decoding=\"async\" aria-describedby=\"caption-attachment-2407\" class=\"wp-image-2407 size-medium\" src=\"https:\/\/ist.blogs.inra.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/06-Band-sawing-Douglas-fir-log-300x200.jpg\" alt=\"\" width=\"300\" height=\"200\" srcset=\"https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/06-Band-sawing-Douglas-fir-log-300x200.jpg 300w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/06-Band-sawing-Douglas-fir-log-768x513.jpg 768w, https:\/\/ist.blogs.inrae.fr\/afs\/wp-content\/uploads\/sites\/5\/2017\/07\/06-Band-sawing-Douglas-fir-log.jpg 965w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><p id=\"caption-attachment-2407\" class=\"wp-caption-text\">Picture copyright Andreas Rais<\/p><\/div>\n<section id=\"Abs1\" class=\"Abstract\" lang=\"en\">\n<p class=\"Para\"><em><strong class=\"EmphasisTypeBoldItalic \">Methods <\/strong><\/em>A sample of 36 Douglas-fir logs were scanned in an industrial CT scanner, and sawn into boards. Knots on the boards were manually measured, and compared with the corresponding knots on virtual boards created from the CT data. The error of the DAB was measured by comparing CT data to manual measurements. An optimized sawing simulation was performed, using the measured DAB error to account for CT measurement errors, as well as a rotational error to account for errors in the log turning equipment. Using the results of the sawing simulation, Monte Carlo simulations were performed to show the potential and benefit of an industrial CT scanner. <em><strong class=\"EmphasisTypeBoldItalic \">Results <\/strong><\/em>The three largest DABs measured by the CT showed good correlation to the measurements on the manual boards. The simulation revealed an average increase of value from 4 to 20% compared to the conventional horns-up position depending on the relative price differences between the strength grades. <em><strong class=\"EmphasisTypeBoldItalic \">Conclusion <\/strong><\/em>By using a CT scanner to optimize sawing, sawmill owners can process logs in a better way to produce final products with increased added value.<\/p>\n<\/section>\n<div class=\"KeywordGroup\" lang=\"en\"><\/div>\n<div class=\"KeywordGroup\" lang=\"en\"><div class='altmetric-embed' data-badge-type='donut' data-doi='10.1007\/s13595-017-0630-5'  style='float: right; ' ><\/div><\/div>\n<p>&nbsp;<\/p>\n<p><strong>Publication<\/strong><\/p>\n<p>Rais, A., Ursella, E., Vicario, E. et al. Annals of Forest Science (2017) 74: 28. <a href=\"https:\/\/doi.org\/10.1007\/s13595-017-0630-5\">https:\/\/doi.org\/10.1007\/s13595-017-0630-5<\/a><\/p>\n<p>For the read-only version of the full text: <a href=\"http:\/\/rdcu.be\/uqGm\">http:\/\/rdcu.be\/uqGm<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>&#8230;case study on visually strength-graded Douglas-fir timber. Industrial computed tomography scanning of logs provides detailed information on timber quality prior to sawing. A sawing simulation\u2014considering log rotation angle and knot size accuracy\u2014revealed an average value increase of up to 20% for the best angle compared to the conventional horns-up position. Keywords Breakdown optimization, Wood scanning, [&hellip;]<\/p>\n","protected":false},"author":94,"featured_media":2409,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[14,15],"tags":[],"class_list":["post-2401","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-article-type","category-research-paper","cat-14-id","cat-15-id","has_thumb"],"_links":{"self":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/2401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/users\/94"}],"replies":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/comments?post=2401"}],"version-history":[{"count":0,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/posts\/2401\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media\/2409"}],"wp:attachment":[{"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/media?parent=2401"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/categories?post=2401"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ist.blogs.inrae.fr\/afs\/wp-json\/wp\/v2\/tags?post=2401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}