{"id":14040,"date":"2024-10-22T10:05:00","date_gmt":"2024-10-22T10:05:00","guid":{"rendered":"https:\/\/gd-1.com\/?p=14040"},"modified":"2024-10-23T01:32:48","modified_gmt":"2024-10-23T01:32:48","slug":"to-video-extensometer","status":"publish","type":"post","link":"https:\/\/gd-1.com\/to-video-extensometer\/","title":{"rendered":"TO Video Extensometer: Gi\u1ea3i ph\u00e1p \u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i video kh\u00f4ng ti\u1ebfp x\u00fac l\u00fd t\u01b0\u1edfng cho ki\u1ec3m tra d\u00e2y th\u1eebng"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_69_1 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<label class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">T\u00f3m t\u1eaft n\u1ed9i dung<\/label>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #0a0a0a;color:#0a0a0a\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #0a0a0a;color:#0a0a0a\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Tiep_can_trong_kiem_tra_day_thung\" title=\"Ti\u1ebfp c\u1eadn trong ki\u1ec3m tra d\u00e2y th\u1eebng\">Ti\u1ebfp c\u1eadn trong ki\u1ec3m tra d\u00e2y th\u1eebng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#So_do_nguyen_ly_cua_thiet_lap_thu_nghiem\" title=\"S\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd c\u1ee7a thi\u1ebft l\u1eadp th\u1eed nghi\u1ec7m\">S\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd c\u1ee7a thi\u1ebft l\u1eadp th\u1eed nghi\u1ec7m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Cac_khia_canh_quan_trong_can_luu_y\" title=\"C\u00e1c kh\u00eda c\u1ea1nh quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd\">C\u00e1c kh\u00eda c\u1ea1nh quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Vi_du_thu_nghiem\" title=\"V\u00ed d\u1ee5 th\u1eed nghi\u1ec7m\">V\u00ed d\u1ee5 th\u1eed nghi\u1ec7m<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Vi_tri_camera\" title=\"V\u1ecb tr\u00ed camera\">V\u1ecb tr\u00ed camera<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Dai_danh_dau\" title=\"D\u1ea3i \u0111\u00e1nh d\u1ea5u\">D\u1ea3i \u0111\u00e1nh d\u1ea5u<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Vi_du\" title=\"V\u00ed d\u1ee5\">V\u00ed d\u1ee5<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Vi_tri_toi_uu_cua_camera_va_anh_sang_so_voi_day_thung\" title=\"V\u1ecb tr\u00ed t\u1ed1i \u01b0u c\u1ee7a camera v\u00e0 \u00e1nh s\u00e1ng so v\u1edbi d\u00e2y th\u1eebng\">V\u1ecb tr\u00ed t\u1ed1i \u01b0u c\u1ee7a camera v\u00e0 \u00e1nh s\u00e1ng so v\u1edbi d\u00e2y th\u1eebng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Diem_quan_sat\" title=\"\u0110i\u1ec3m quan s\u00e1t\">\u0110i\u1ec3m quan s\u00e1t<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Phan_quang\" title=\"Ph\u1ea3n quang\">Ph\u1ea3n quang<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/gd-1.com\/to-video-extensometer\/#Hieu_suat_he_thong_dien_hinh\" title=\"Hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng \u0111i\u1ec3n h\u00ecnh\">Hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng \u0111i\u1ec3n h\u00ecnh<\/a><\/li><\/ul><\/nav><\/div>\n<p><strong>T\u1ea1i sao l\u1ea1i ch\u1ecdn gi\u1ea3i ph\u00e1p <a href=\"https:\/\/gd-1.com\/san-pham\/non-contact-video-extensometer-thiet-bi-do-do-gian-dai-video-khong-tiep-xuc\/\">\u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i kh\u00f4ng ti\u1ebfp x\u00fac<\/a>?<\/strong><\/p>\n<p>Ki\u1ec3m tra d\u00e2y th\u1eebng c\u00f3 t\u00ednh ch\u1ea5t n\u1ed5 khi b\u1ecb \u0111\u1ee9t. B\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng n\u00e0o ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi d\u00e2y th\u1eebng \u0111\u1ec1u ph\u1ea3i \u0111\u1ee7 ch\u1eafc ch\u1eafn \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c s\u1ef1 \u0111\u1ee9t g\u00e3y m\u1ea1nh m\u1ebd. \u0110i\u1ec1u n\u00e0y khi\u1ebfn h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng s\u1ebd n\u1eb7ng h\u01a1n v\u00e0 n\u1ebfu d\u00e2y th\u1eebng b\u1ecb c\u0103ng \u0111\u1ee9t c\u00f3 th\u1ec3 v\u0103ng ra r\u1ea5t m\u1ea1nh g\u00e2y nguy hi\u1ec3m. <a href=\"https:\/\/gd-1.com\/product-brands\/tinius-olsen\/\">Tinius Olsen<\/a> cung c\u1ea5p gi\u1ea3i ph\u00e1p kh\u00f4ng ti\u1ebfp x\u00fac t\u1ed1i \u01b0u \u0111\u1ec3 gi\u1ea3i quy\u1ebft th\u00e1ch th\u1ee9c tr\u00ean.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14050 alignleft\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.34\u202fPM-300x110.png\" alt=\"\" width=\"300\" height=\"110\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.34\u202fPM-300x110.png 300w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.34\u202fPM-510x186.png 510w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.34\u202fPM.png 520w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14051 alignnone\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.45\u202fPM-204x300.png\" alt=\"\" width=\"204\" height=\"300\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.45\u202fPM-204x300.png 204w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.45\u202fPM.png 344w\" sizes=\"(max-width: 204px) 100vw, 204px\" \/> <img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-14052 alignnone\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.55\u202fPM-277x300.png\" alt=\"\" width=\"277\" height=\"300\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.55\u202fPM-277x300.png 277w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.23.55\u202fPM.png 286w\" sizes=\"(max-width: 277px) 100vw, 277px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Tiep_can_trong_kiem_tra_day_thung\"><\/span><strong>Ti\u1ebfp c\u1eadn trong ki\u1ec3m tra d\u00e2y th\u1eebng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Khi ti\u1ebfp c\u1eadn b\u1ea5t k\u1ef3 \u1ee9ng d\u1ee5ng n\u00e0o, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i bi\u1ebft c\u00e1c th\u00f4ng s\u1ed1 c\u1ee7a th\u1eed nghi\u1ec7m. Th\u1eed nghi\u1ec7m d\u00e2y th\u1eebng c\u0169ng kh\u00f4ng ngo\u1ea1i l\u1ec7.<br \/>\nKhi th\u1eed nghi\u1ec7m d\u00e2y th\u1eebng, c\u1ea7n bi\u1ebft c\u00e1c th\u00f4ng tin sau:<\/p>\n<ul>\n<li>\u0110\u01b0\u1eddng k\u00ednh d\u00e2y th\u1eebng<\/li>\n<li>Chi\u1ec1u d\u00e0i d\u00e2y th\u1eebng<\/li>\n<li>Chi\u1ec1u d\u00e0i \u0111o (Gauge length)<\/li>\n<li>T\u1ed5ng \u0111\u1ed9 gi\u00e3n d\u1ef1 ki\u1ebfn<\/li>\n<li>V\u1eadt li\u1ec7u c\u1ee7a d\u00e2y th\u1eebng<\/li>\n<\/ul>\n<p>Nh\u1eefng th\u00f4ng s\u1ed1 n\u00e0y s\u1ebd quy\u1ebft \u0111\u1ecbnh v\u1ecb tr\u00ed c\u1ee7a camera v\u00e0 k\u00edch th\u01b0\u1edbc m\u1ee5c ti\u00eau c\u1ea7n \u0111o.<\/p>\n<p>D\u00e2y th\u1eebng th\u01b0\u1eddng &#8220;t\u01b0\u01a1ng \u0111\u1ed1i&#8221; d\u00e0i v\u00e0 m\u1ea3nh. Do \u0111\u00f3, t\u1ed1t nh\u1ea5t n\u00ean s\u1eed d\u1ee5ng chi\u1ec1u d\u00e0i l\u1edbn nh\u1ea5t c\u1ee7a c\u1ea3m bi\u1ebfn theo h\u01b0\u1edbng d\u1ecbch chuy\u1ec3n.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"So_do_nguyen_ly_cua_thiet_lap_thu_nghiem\"><\/span><strong>S\u01a1 \u0111\u1ed3 nguy\u00ean l\u00fd c\u1ee7a thi\u1ebft l\u1eadp th\u1eed nghi\u1ec7m<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>D\u01b0\u1edbi \u0111\u00e2y l\u00e0 s\u01a1 \u0111\u1ed3 g\u1eafn nh\u00e3n c\u1ee7a m\u1ed9t th\u1eed nghi\u1ec7m d\u00e2y th\u1eebng, hi\u1ec3n th\u1ecb v\u1ecb tr\u00ed camera c\u1ee7a video extensometer so v\u1edbi m\u1eabu th\u1eed.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\" wp-image-14043 aligncenter\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.06.53\u202fPM-300x111.png\" alt=\"\" width=\"630\" height=\"233\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.06.53\u202fPM-300x111.png 300w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.06.53\u202fPM-768x285.png 768w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.06.53\u202fPM-510x189.png 510w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.06.53\u202fPM.png 912w\" sizes=\"(max-width: 630px) 100vw, 630px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Cac_khia_canh_quan_trong_can_luu_y\"><\/span><strong>C\u00e1c kh\u00eda c\u1ea1nh quan tr\u1ecdng c\u1ea7n l\u01b0u \u00fd<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Khi ki\u1ec3m tra d\u00e2y th\u1eebng, \u0111i\u1ec1u quan tr\u1ecdng l\u00e0 ph\u1ea3i hi\u1ec3u v\u00e0 nh\u1edb r\u1eb1ng:<\/p>\n<ul>\n<li>Gi\u1ea3 \u0111\u1ecbnh r\u1eb1ng m\u1ed9t \u0111\u1ea7u d\u00e2y th\u1eebng \u0111\u01b0\u1ee3c c\u1ed1 \u0111\u1ecbnh trong su\u1ed1t qu\u00e1 tr\u00ecnh th\u1eed nghi\u1ec7m v\u00e0 \u0111\u1ea7u kia \u0111\u01b0\u1ee3c cho ph\u00e9p di chuy\u1ec3n.<\/li>\n<li>Tr\u01b0\u1edbc khi \u0111\u1ea1t \u0111\u1ebfn chi\u1ec1u d\u00e0i \u0111o (gauge length), s\u1ebd c\u00f3 s\u1ef1 d\u1ecbch chuy\u1ec3n v\u00e0 gi\u00e3n d\u00e0i. Do \u0111\u00f3, \u0111\u1ed9 bi\u1ebfn d\u1ea1ng t\u1ed1i \u0111a m\u00e0 b\u1ea1n c\u00f3 th\u1ec3 \u0111o \u0111\u01b0\u1ee3c s\u1ebd t\u0103ng l\u00ean khi b\u1ea1n c\u00e0ng g\u1ea7n \u0111\u1ea7u c\u1ed1 \u0111\u1ecbnh.<\/li>\n<li>Khi thi\u1ebft l\u1eadp chi\u1ec1u d\u00e0i \u0111o tr\u00ean d\u00e2y th\u1eebng, chi\u1ec1u d\u00e0i n\u00e0y c\u1ea7n ph\u1ea3i lu\u00f4n n\u1eb1m trong khung nh\u00ecn c\u1ee7a camera. <a href=\"https:\/\/gd-1.com\/product-brands\/tinius-olsen\/\">Tinius Olsen<\/a> cung c\u1ea5p ho\u1eb7c c\u00f3 s\u1eb5n b\u1ea3ng t\u00ednh Excel \u0111\u1ec3 h\u1ed7 tr\u1ee3 ng\u01b0\u1eddi d\u00f9ng thi\u1ebft l\u1eadp th\u1eed nghi\u1ec7m n\u00e0y m\u1ed9t c\u00e1ch tr\u1ef1c quan v\u00e0 s\u1ed1 h\u1ecdc.<\/li>\n<li>\u0110\u01b0\u1eddng k\u00ednh d\u00e2y th\u1eebng s\u1ebd \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn s\u1ed1 l\u01b0\u1ee3ng pixel trong h\u00ecnh \u1ea3nh. C\u00f3 th\u1ec3 c\u1ea7n ph\u1ea3i \u0111\u00e1nh d\u1ea5u ph\u1ea3n quang v\u00e0o d\u00e2y th\u1eebng \u0111\u1ec3 t\u0103ng chi\u1ec1u r\u1ed9ng c\u1ee7a n\u00f3 \u0111\u1ebfn k\u00edch th\u01b0\u1edbc ph\u00f9 h\u1ee3p<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-14045 aligncenter\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.10.38\u202fPM-300x47.png\" alt=\"\" width=\"518\" height=\"81\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.10.38\u202fPM-300x47.png 300w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.10.38\u202fPM-510x79.png 510w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.10.38\u202fPM.png 720w\" sizes=\"(max-width: 518px) 100vw, 518px\" \/><\/p>\n<p style=\"text-align: center;\">C\u00e1c d\u1ea3i \u0111\u00e1nh d\u1ea5u n\u00e0y n\u00ean l\u00e0 c\u00e1c d\u1ea3i m\u1edd, m\u1ed7i d\u1ea3i c\u00f3 \u0111\u01b0\u1eddng k\u00ednh kho\u1ea3ng 20 pixel.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vi_du_thu_nghiem\"><\/span><strong>V\u00ed d\u1ee5 th\u1eed nghi\u1ec7m<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Chi\u1ec1u d\u00e0i d\u00e2y th\u1eebng: 4000mm, \u0111\u01b0\u1eddng k\u00ednh 75mm<\/li>\n<li>Chi\u1ec1u d\u00e0i \u0111o (Gauge length): 1500mm<\/li>\n<li>Bi\u1ebfn d\u1ea1ng khi \u0111\u1ee9t: 6,25%<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-14044 aligncenter\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.08.50\u202fPM-300x202.png\" alt=\"\" width=\"500\" height=\"337\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.08.50\u202fPM-300x202.png 300w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.08.50\u202fPM-510x343.png 510w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.08.50\u202fPM.png 720w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Vi_tri_camera\"><\/span>V\u1ecb tr\u00ed camera<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>V\u1edbi c\u00e1c ph\u00e9p \u0111o d\u1ef1a tr\u00ean camera, s\u1ef1 d\u1ecbch chuy\u1ec3n ngo\u00e0i m\u1eb7t ph\u1eb3ng c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn k\u1ebft qu\u1ea3 \u0111o. Thi\u1ebft b\u1ecb \u0111o \u0111\u1ed9 gi\u00e3i d\u00e0i video <a href=\"https:\/\/gd-1.com\/san-pham\/non-contact-video-extensometer-thiet-bi-do-do-gian-dai-video-khong-tiep-xuc\/\">TO Video Extensometer<\/a> qu\u1ea3n l\u00fd \u0111i\u1ec1u n\u00e0y \u0111\u1ebfn m\u1ee9c kh\u00f4ng \u0111\u00e1ng k\u1ec3, tuy nhi\u00ean, n\u00ean \u0111\u1eb7t camera \u1edf kho\u1ea3ng c\u00e1ch h\u1ee3p l\u00fd v\u1edbi d\u00e2y th\u1eebng \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o an to\u00e0n v\u00e0 tr\u00e1nh vi\u1ec7c \u0111\u1eb7t camera g\u1ea7n \u0111i\u1ec3m \u0111\u1ee9t g\u00e3y m\u1ea1nh.<\/li>\n<li>C\u00e0ng \u0111\u1eb7t xa camera, v\u00f9ng quan s\u00e1t (FOV) c\u00e0ng l\u1edbn. V\u00ed d\u1ee5: m\u1ed9t camera 5MP v\u00e0 \u1ed1ng k\u00ednh 12mm \u0111\u1eb7t \u1edf kho\u1ea3ng c\u00e1ch kho\u1ea3ng 2650mm t\u1eeb d\u00e2y th\u1eebng s\u1ebd t\u1ea1o ra v\u00f9ng quan s\u00e1t kho\u1ea3ng 1850 x 1550mm.<\/li>\n<li>Khuy\u1ebfn ngh\u1ecb l\u1eafp \u0111\u1eb7t camera trong h\u1ed9p b\u1ea3o v\u1ec7, ngay c\u1ea3 khi kh\u00f4ng d\u1ef1 \u0111\u1ecbnh th\u1eed nghi\u1ec7m \u0111\u1ebfn m\u1ee9c g\u00e2y h\u1ecfng. \u0110i\u1ec1u n\u00e0y kh\u00f4ng \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t c\u1ee7a video extensometer.<\/li>\n<li>Camera c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1eb7t theo ph\u01b0\u01a1ng ngang (roll), v\u00e0 khung gi\u00e1 \u0111\u1ee1 n\u00ean c\u00f3 kh\u1ea3 n\u0103ng \u0111i\u1ec1u ch\u1ec9nh g\u00f3c \u0111\u1ec3 h\u1ed7 tr\u1ee3 c\u0103n ch\u1ec9nh (pitch).<\/li>\n<li>Tr\u1ee5c quang h\u1ecdc c\u1ea7n ph\u1ea3i vu\u00f4ng g\u00f3c v\u1edbi d\u00e2y th\u1eebng.<\/li>\n<li>Tr\u1ee5c quang h\u1ecdc n\u00ean \u0111\u01b0\u1ee3c l\u1ec7ch 100mm t\u1eeb trung t\u00e2m c\u1ee7a chi\u1ec1u d\u00e0i \u0111o \u0111\u1ec3 d\u1ec5 d\u00e0ng c\u0103n ch\u1ec9nh m\u1ee5c ti\u00eau.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Dai_danh_dau\"><\/span>D\u1ea3i \u0111\u00e1nh d\u1ea5u<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Do t\u00ednh ch\u1ea5t n\u1ed5 c\u1ee7a s\u1ef1 \u0111\u1ee9t g\u00e3y, n\u00ean s\u1eed d\u1ee5ng c\u00e1c d\u1ea3i \u0111\u00e1nh d\u1ea5u tr\u1ecdng l\u01b0\u1ee3ng nh\u1eb9, c\u00f3 th\u1ec3 d\u00f9ng t\u1ea1m th\u1eddi.<\/li>\n<li>D\u1ea3i \u0111\u00e1nh d\u1ea7u g\u1ed3m c\u00e1c d\u1ea3i v\u1edbi c\u1ea1nh \u0111en tr\u1eafng m\u1edd.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Vi_du\"><\/span>V\u00ed d\u1ee5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>9 d\u1ea3i, v\u1edbi c\u1ea1nh m\u1edd (b\u1ed1n d\u1ea3i \u0111en v\u00e0 n\u0103m d\u1ea3i tr\u1eafng).<\/li>\n<li>Chi\u1ec1u r\u1ed9ng c\u1ee7a d\u1ea3i \u0111\u00e1nh d\u1ea5u = 100mm.<\/li>\n<li>D\u1ea3i \u0111\u00e1nh d\u1ea5u \u0111\u01b0\u1ee3c g\u1eafn c\u00e1ch nhau 1500mm.<\/li>\n<li>D\u1ea3i \u0111\u00e1nh d\u1ea5u \u0111\u01b0\u1ee3c g\u1eafn \u0111\u1ed1i x\u1ee9ng quanh t\u00e2m c\u1ee7a d\u00e2y th\u1eebng.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Vi_tri_toi_uu_cua_camera_va_anh_sang_so_voi_day_thung\"><\/span>V\u1ecb tr\u00ed t\u1ed1i \u01b0u c\u1ee7a camera v\u00e0 \u00e1nh s\u00e1ng so v\u1edbi d\u00e2y th\u1eebng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Camera c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1eb7t sao cho \u00e1nh s\u00e1ng \u0111\u1ee7 \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o h\u00ecnh \u1ea3nh r\u00f5 r\u00e0ng v\u00e0 \u0111\u1ea3m b\u1ea3o qu\u00e1 tr\u00ecnh \u0111o kh\u00f4ng b\u1ecb \u1ea3nh h\u01b0\u1edfng b\u1edfi \u00e1nh s\u00e1ng k\u00e9m ho\u1eb7c b\u00f3ng t\u1ed1i t\u1eeb c\u00e1c thi\u1ebft b\u1ecb xung quanh.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-14046 aligncenter\" src=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.12.46\u202fPM-300x152.png\" alt=\"\" width=\"628\" height=\"318\" srcset=\"https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.12.46\u202fPM-300x152.png 300w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.12.46\u202fPM-510x259.png 510w, https:\/\/gd-1.com\/wp-content\/uploads\/2024\/10\/Screenshot-2024-10-22-at-4.12.46\u202fPM.png 768w\" sizes=\"(max-width: 628px) 100vw, 628px\" \/><\/p>\n<h2><span class=\"ez-toc-section\" id=\"Diem_quan_sat\"><\/span>\u0110i\u1ec3m quan s\u00e1t<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Khi m\u00e1y th\u1eed nghi\u1ec7m c\u00f3 t\u1ea5m ch\u1eafn b\u1ea3o v\u1ec7, c\u1ea7n c\u00f3 m\u1ed9t khe \u0111\u1ec3 quan s\u00e1t d\u00e2y th\u1eebng. Khe n\u00e0y ph\u1ea3i c\u00f3 chi\u1ec1u r\u1ed9ng v\u00e0 chi\u1ec1u d\u00e0i ph\u00f9 h\u1ee3p.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Phan_quang\"><\/span>Ph\u1ea3n quang<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>\u0110\u1ea3m b\u1ea3o \u00e1nh s\u00e1ng lan t\u1ecfa \u0111\u1ec1u tr\u00ean c\u00e1c d\u1ea3i \u0111\u00e1nh d\u1ea5u. H\u1ec7 th\u1ed1ng Tinius Olsen kh\u00f4ng y\u00eau c\u1ea7u \u00e1nh s\u00e1ng \u0111\u1eb7c bi\u1ec7t nh\u01b0 m\u00e0u \u0111\u1ecf hay m\u00e0u kh\u00e1c.<\/li>\n<li>T\u00f9y thu\u1ed9c v\u00e0o chi\u1ec1u d\u00e0i c\u1ee7a m\u1eabu d\u00e2y th\u1eebng, c\u00f3 th\u1ec3 c\u1ea7n hai \u0111\u00e8n, m\u1ed7i \u0111\u00e8n \u0111\u1ed1i di\u1ec7n v\u1edbi m\u1ed9t v\u1ecb tr\u00ed \u0111\u00e1nh d\u1ea5u<\/li>\n<li>\u0110\u00e8n n\u00ean c\u00f3 d\u1ea1ng d\u00e0i, h\u00ecnh ch\u1eef nh\u1eadt (gi\u1ed1ng nh\u01b0 \u0111\u00e8n tu\u00fdp), thay v\u00ec \u0111\u00e8n \u0111i\u1ec3m, v\u00e0 \u0111\u01b0\u1ee3c trang b\u1ecb l\u1edbp b\u1ea3o v\u1ec7 khu\u1ebfch t\u00e1n.<\/li>\n<li>Khuy\u1ebfn ngh\u1ecb s\u1eed d\u1ee5ng \u0111\u00e8n LED ho\u1eb7c \u0111\u00e8n c\u00f3 t\u1ea7n s\u1ed1 cao \u0111\u1ec3 lo\u1ea1i b\u1ecf hi\u1ec7n t\u01b0\u1ee3ng nh\u1ea5p nh\u00e1y.<\/li>\n<li>\u0110\u00e8n c\u1ea7n \u0111\u01b0\u1ee3c \u0111\u1eb7t g\u1ea7n tr\u1ee5c quang h\u1ecdc c\u1ee7a camera nh\u01b0ng kh\u00f4ng c\u1ea3n tr\u1edf v\u00f9ng quan s\u00e1t (FOV).<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Hieu_suat_he_thong_dien_hinh\"><\/span>Hi\u1ec7u su\u1ea5t h\u1ec7 th\u1ed1ng \u0111i\u1ec3n h\u00ecnh<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>T\u1ed1c \u0111\u1ed9 l\u1ea5y m\u1eabu: 9Hz (t\u1ed1i \u0111a).<\/li>\n<li>\u0110\u1ed9 ph\u00e2n gi\u1ea3i d\u1ecbch chuy\u1ec3n: kho\u1ea3ng 10 micromet.<\/li>\n<li>Ph\u1ea1m vi bi\u1ebfn d\u1ea1ng \u1edf chi\u1ec1u d\u00e0i \u0111o 1,5m: kho\u1ea3ng 0-10%.<\/li>\n<li>\u0110\u1ed9 ph\u00e2n gi\u1ea3i bi\u1ebfn d\u1ea1ng \u1edf chi\u1ec1u d\u00e0i \u0111o 1,5m: kho\u1ea3ng 5 microstrain.<\/li>\n<\/ul>\n<p><em>Ngu\u1ed3n: Tinius Olsen<\/em><\/p>\n<p><strong>Minh Khang l\u00e0 nh\u00e0 ph\u00e2n ph\u1ed1i v\u00e0 nh\u1eadp kh\u1ea9u tr\u1ef1c ti\u1ebfp c\u00e1c <a href=\"https:\/\/gd-1.com\/product-category\/phan-tich-hoa-ly\/do-do-gian-dai\/\">thi\u1ebft b\u1ecb \u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i<\/a> t\u1eeb h\u00e3ng <a href=\"https:\/\/gd-1.com\/product-brands\/tinius-olsen\/\">Tinius Olsen<\/a> t\u1ea1i th\u1ecb tr\u01b0\u1eddng Vi\u1ec7t Nam.<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>T\u1ea1i sao l\u1ea1i ch\u1ecdn gi\u1ea3i ph\u00e1p \u0111o \u0111\u1ed9 gi\u00e3n d\u00e0i kh\u00f4ng ti\u1ebfp x\u00fac? Ki\u1ec3m tra d\u00e2y th\u1eebng c\u00f3 t\u00ednh ch\u1ea5t n\u1ed5 khi b\u1ecb \u0111\u1ee9t. B\u1ea5t k\u1ef3 h\u1ec7 th\u1ed1ng \u0111o l\u01b0\u1eddng n\u00e0o ti\u1ebfp x\u00fac tr\u1ef1c ti\u1ebfp v\u1edbi d\u00e2y th\u1eebng \u0111\u1ec1u ph\u1ea3i \u0111\u1ee7 ch\u1eafc ch\u1eafn \u0111\u1ec3 ch\u1ecbu \u0111\u01b0\u1ee3c s\u1ef1 \u0111\u1ee9t g\u00e3y m\u1ea1nh m\u1ebd. \u0110i\u1ec1u n\u00e0y khi\u1ebfn h\u1ec7&#8230;<\/p>\n","protected":false},"author":3,"featured_media":14049,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"rank_math_lock_modified_date":false,"footnotes":""},"categories":[40],"tags":[],"class_list":["post-14040","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tin-tuc"],"acf":[],"_links":{"self":[{"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/posts\/14040"}],"collection":[{"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/comments?post=14040"}],"version-history":[{"count":7,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/posts\/14040\/revisions"}],"predecessor-version":[{"id":14058,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/posts\/14040\/revisions\/14058"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/media\/14049"}],"wp:attachment":[{"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/media?parent=14040"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/categories?post=14040"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gd-1.com\/wp-json\/wp\/v2\/tags?post=14040"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}