{"id":311,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/windowing\/"},"modified":"2026-05-23T22:40:35","modified_gmt":"2026-05-23T22:40:35","slug":"windowing","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/sk\/glossary\/windowing\/","title":{"rendered":"\u010co je to okenovanie v FFT anal\u00fdze?"},"content":{"rendered":"<h1>Pochopenie okenovania v FFT anal\u00fdze<\/h1>\n\t\t<section class=\"woocommerce hestia-shop products is-shortcode\" id=\"products\" data-sorder=\"hestia_shop\" >\n\t\t\t\t\t\t<div class=\"\">\n\t\t\t\t\t\t<div class=\"hestia-shop-content\">\n\t\t\t<div class=\"row\" data-aos=\"fade-up\" >\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/balanset-1\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/balanset-1\/\" title=\"Prenosn\u00fd vyva\u017eova\u010d a analyz\u00e1tor vibr\u00e1ci\u00ed Balanset-1A\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Kompletn\u00e1 s\u00faprava prenosn\u00e9ho vyva\u017eovacieho zariadenia a analyz\u00e1tora vibr\u00e1ci\u00ed Balanset-1A\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/09\/77-e1693745667801-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/devices\/\" rel=\"tag\">Zariadenia<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/balanset-1\/\" title=\"Prenosn\u00fd vyva\u017eova\u010d a analyz\u00e1tor vibr\u00e1ci\u00ed Balanset-1A\">Prenosn\u00fd vyva\u017eova\u010d a analyz\u00e1tor vibr\u00e1ci\u00ed Balanset-1A<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,975.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=986\" data-quantity=\"1\" data-product_id=\"986\" data-product_sku=\"BS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=986\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_986\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"986\" data-product_sku=\"BS-1\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201c\" rel=\"nofollow\" data-success_message=\"\u201ePortable balancer &amp; Vibration analyzer Balanset-1A\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_986\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/vibration-sensor\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/vibration-sensor\/\" title=\"Sn\u00edma\u010d vibr\u00e1ci\u00ed\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Sn\u00edma\u010d vibr\u00e1ci\u00ed Balanset-1A zbl\u00edzka\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-3.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/parts\/\" rel=\"tag\">Diely<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/vibration-sensor\/\" title=\"Sn\u00edma\u010d vibr\u00e1ci\u00ed\">Sn\u00edma\u010d vibr\u00e1ci\u00ed<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>90.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1820\" data-quantity=\"1\" data-product_id=\"1820\" data-product_sku=\"VS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1820\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1820\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1820\" data-product_sku=\"VS-1\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201eVibration sensor\u201c\" rel=\"nofollow\" data-success_message=\"\u201eVibration sensor\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1820\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/optical-sensor-for-balanset-and-arbalance\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optick\u00fd senzor (laserov\u00fd tachometer)\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Optick\u00fd senzor (laserov\u00fd tachometer)\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-1536x1023.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/ZKqzGXSCCBU.webp 1600w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/parts\/\" rel=\"tag\">Diely<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optick\u00fd senzor (laserov\u00fd tachometer)\">Optick\u00fd senzor (laserov\u00fd tachometer)<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>124.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1832\" data-quantity=\"1\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1832\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1832\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1832\" data-product_sku=\"Tach-1\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201eOptical Sensor (Laser Tachometer)\u201c\" rel=\"nofollow\" data-success_message=\"\u201eOptical Sensor (Laser Tachometer)\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1832\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/balanset-4\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/balanset-4\/\" title=\"Balanset-4\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"S\u00faprava na vyva\u017eovanie rotora Vibromera: prenosn\u00e9 puzdro, viackan\u00e1lov\u00fd prevodn\u00edk sign\u00e1lu, ru\u010dn\u00fd analyz\u00e1tor, magnetick\u00e1 z\u00e1klad\u0148a, vibra\u010dn\u00e9 senzory a \u0161pir\u00e1lov\u00e9 k\u00e1ble.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-18x12.webp 18w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2022\/12\/balkom4.webp 640w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/devices\/\" rel=\"tag\">Zariadenia<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/balanset-4\/\" title=\"Balanset-4\">Balanset-4<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>6,803.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1833\" data-quantity=\"1\" data-product_id=\"1833\" data-product_sku=\"BS-4\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1833\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1833\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1833\" data-product_sku=\"BS-4\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201eBalanset-4\u201c\" rel=\"nofollow\" data-success_message=\"\u201eBalanset-4\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1833\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div><!-- \/.row --><div class=\"row\">\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/magnet-stand\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/magnet-stand\/\" title=\"Magnetick\u00fd stojan Insize-60-kgf\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Magnetick\u00e1 z\u00e1klad\u0148a.\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-1024x682.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2018\/05\/IMG-36.webp 1280w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/parts\/\" rel=\"tag\">Diely<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/magnet-stand\/\" title=\"Magnetick\u00fd stojan Insize-60-kgf\">Magnetick\u00fd stojan Insize-60-kgf<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>46.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1852\" data-quantity=\"1\" data-product_id=\"1852\" data-product_sku=\"MS-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=1852\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_1852\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"1852\" data-product_sku=\"MS-1\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201eMagnetic Stand Insize-60-kgf\u201c\" rel=\"nofollow\" data-success_message=\"\u201eMagnetic Stand Insize-60-kgf\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_1852\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/reflective-tape\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/reflective-tape\/\" title=\"Reflexn\u00e1 p\u00e1ska\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Reflexn\u00e1 p\u00e1ska\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-16x12.webp 16w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-460x306.webp 460w, https:\/\/vibromera.eu\/wp-content\/uploads\/2023\/05\/s-l1600-272x182.webp 272w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/parts\/\" rel=\"tag\">Diely<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/reflective-tape\/\" title=\"Reflexn\u00e1 p\u00e1ska\">Reflexn\u00e1 p\u00e1ska<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>10.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=2329\" data-quantity=\"1\" data-product_id=\"2329\" data-product_sku=\"rt-1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=2329\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_2329\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"2329\" data-product_sku=\"rt-1\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201eReflective tape\u201c\" rel=\"nofollow\" data-success_message=\"\u201eReflective tape\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_2329\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t<div class=\"col-ms-6 col-sm-6 col-md-3 shop-item\">\n\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/dynamic-balancer-balanset-1a\/\" class=\"woocommerce-LoopProduct-link woocommerce-loop-product__link\">\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"card-image\">\n\t\t\t\t\t\t\t\t\t<a href=\"https:\/\/vibromera.eu\/sk\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamick\u00fd vyva\u017eova\u010d &quot;Balanset-1A&quot; OEM\">\n\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"230\" height=\"153\" src=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp\" class=\"attachment-woocommerce_thumbnail size-woocommerce_thumbnail\" alt=\"Obsah s\u00fapravy Balanset-1A s jednotkou rozhrania, sn\u00edma\u010dmi, tachometrom a pr\u00edslu\u0161enstvom\" srcset=\"https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-230x153.webp 230w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-600x400.webp 600w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-300x200.webp 300w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1024x683.webp 1024w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-768x512.webp 768w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-1536x1024.webp 1536w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-2048x1366.webp 2048w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-360x240.webp 360w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-272x182.webp 272w, https:\/\/vibromera.eu\/wp-content\/uploads\/2021\/11\/\u0411\u0430\u043b\u043a\u043e\u043c\u041a\u0438\u0442-scaled-e1732998877834.webp 708w\" sizes=\"auto, (max-width: 230px) 100vw, 230px\" \/>\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t\t\t\t\t\t<div class=\"ripple-container\"><\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<div class=\"content\">\n\t\t\t\t\t\t\t\t<span class=\"category\"><a href=\"https:\/\/vibromera.eu\/sk\/product-category\/devices\/\" rel=\"tag\">Zariadenia<\/a><\/span>\n\t\t\t\t\t\t\t\t<h4 class=\"card-title\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<a class=\"shop-item-title-link\" href=\"https:\/\/vibromera.eu\/sk\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamick\u00fd vyva\u017eova\u010d &quot;Balanset-1A&quot; OEM\">Dynamick\u00fd vyva\u017eova\u010d \"Balanset-1A\" OEM<\/a>\n\n\t\t\t\t\t\t\t\t<\/h4>\n\n\t\t\t\t\t\t\t\t\n\t\t\t\t\t\t\t\t<div class=\"footer\">\n\n\t\t\t\t\t\t\t\t\t<div class=\"price\"><h4><span class=\"woocommerce-Price-amount amount\"><span class=\"woocommerce-Price-currencySymbol\">\u20ac<\/span>1,735.00<\/span> + DPH (ak sa uplat\u0148uje)<\/h4><\/div>\n\t\t\t\t\t\t\t\t\t<div class=\"stats\">\n\t\t\t\t\t\t\t\t\t\t<a rel=\"nofollow\" href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=4193\" data-quantity=\"1\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart btn btn-just-icon btn-simple btn-default\" title=\"Prida\u0165 do ko\u0161\u00edka\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Prida\u0165 do ko\u0161\u00edka\" class=\"fas fa-cart-plus\" data-no-translation-data-original-title=\"\"><\/i><\/a>\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/a><a href=\"\/sk\/wp-json\/wp\/v2\/glossary\/311?add-to-cart=4193\" aria-describedby=\"woocommerce_loop_add_to_cart_link_describedby_4193\" data-quantity=\"1\" class=\"button product_type_simple add_to_cart_button ajax_add_to_cart\" data-product_id=\"4193\" data-product_sku=\"BS-1OEM\" aria-label=\"Prida\u0165 do ko\u0161\u00edka: \u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201c\" rel=\"nofollow\" data-success_message=\"\u201eDynamic balancer \u201cBalanset-1A\u201d OEM\u201c bol pridan\u00fd do v\u00e1\u0161ho ko\u0161\u00edka\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Prida\u0165 do ko\u0161\u00edka<\/a>\t<span id=\"woocommerce_loop_add_to_cart_link_describedby_4193\" class=\"screen-reader-text\">\n\t\t\t<\/span>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/section>\n\t\t\n<p><strong>V\u00e1hovanie<\/strong> je krok spracovania sign\u00e1lu, pri ktorom sa matematick\u00e1 v\u00e1hovacia funkcia \u2014 \u201eokno\u201c \u2014 aplikuje na blok <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/time-waveform\/\">\u010dasov\u00fd priebeh<\/a> d\u00e1t predt\u00fdm, ako sa odovzdaj\u00fa do r\u00fdchlej Fourierovej transform\u00e1cie. Tvar okna plynulo zni\u017euje amplit\u00fadu zachyten\u00e9ho sign\u00e1lu a\u017e na nulu na za\u010diatku a na konci \u010dasov\u00e9ho bloku, tak\u017ee sa d\u00e1ta spoja bez n\u00e1hlych skokov. Pr\u00e1ve t\u00e1to jedin\u00e1 oper\u00e1cia potl\u00e1\u010da be\u017en\u00fa chybu naz\u00fdvan\u00fa <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/spectral-leakage\/\">spektr\u00e1lny \u00fanik<\/a> a je preto nevyhnutn\u00fd na vytvorenie presn\u00e9ho <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/spectrum\/\">vibra\u010dn\u00e9 spektrum<\/a>. V praxi <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/vibration-analysis\/\">anal\u00fdza vibr\u00e1ci\u00ed<\/a>Spr\u00e1vny v\u00fdber a pou\u017eitie okna je rozhoduj\u00facim faktorom medzi \u010dist\u00fdm, d\u00f4veryhodn\u00fdm spektrom a rozmazan\u00fdm, zav\u00e1dzaj\u00facim obrazom.<\/p>\n<h2>1. Defin\u00edcia: \u010co je to okenn\u00e1 funkcia?<\/h2>\n<p>Okenn\u00e1 funkcia je profil \u2013 s\u00fabor n\u00e1sobite\u013eov, po jednom na ka\u017ed\u00fd vzorok \u2013, ktor\u00fd sa aplikuje na surov\u00fd \u010dasov\u00fd blok. Tam, kde je hodnota okna 1,0, vzorok prejde bez zmeny; tam, kde kles\u00e1 smerom k 0,0, vzorok sa utlm\u00ed. Ke\u010f\u017ee takmer ka\u017ed\u00e9 okno dosahuje maximum uprostred a na oboch koncoch sa zu\u017euje, vyn\u00e1soben\u00edm \u010dasov\u00e9ho z\u00e1znamu oknom sa dosiahne, \u017ee zachyten\u00fd \u00fasek za\u010d\u00edna a kon\u010d\u00ed pri nulovej amplit\u00fade. Matematika <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/fft\/\">R\u00fdchla premena funkcie (FFT)<\/a> zost\u00e1vaj\u00fa nezmenen\u00e9; rozdelenie do okien sl\u00fa\u017ei len na pr\u00edpravu \u00fadajov tak, aby boli splnen\u00e9 vstavan\u00e9 predpoklady transform\u00e1cie. Bez neho m\u00f4\u017ee by\u0165 spektrum, ktor\u00e9 analyz\u00e1tor vr\u00e1ti, kvantitat\u00edvne nespr\u00e1vne, aj ke\u010f s\u00fa senzor a zvy\u0161ok meracieho re\u0165azca bezchybn\u00e9.<\/p>\n<h2>2. Probl\u00e9m: spektr\u00e1lny \u00fanik<\/h2>\n<p>FFT vych\u00e1dza z vn\u00fatorn\u00e9ho predpokladu: analyzovan\u00fd kone\u010dn\u00fd blok \u010dasov\u00fdch \u00fadajov pova\u017euje za <em>jeden cel\u00fd cyklus dokonale periodick\u00e9ho sign\u00e1lu, ktor\u00fd sa neust\u00e1le opakuje<\/em>. Sign\u00e1ly skuto\u010dn\u00fdch strojov sa takmer nikdy nespr\u00e1vaj\u00fa predv\u00eddate\u013ene. Ke\u010f sa sn\u00edmanie spust\u00ed a zastav\u00ed v \u013eubovo\u013en\u00fdch okamihoch, koniec zachyten\u00e9ho bloku sa nezhoduje s jeho za\u010diatkom, tak\u017ee ke\u010f FFT tento blok ment\u00e1lne \u201ezavrie\u201c sp\u00e4\u0165 do seba, na hraniciach zaznamen\u00e1 ostr\u00e9, umel\u00e9 diskontinuity.<\/p>\n<p>T\u00e1to transform\u00e1cia interpretuje tieto n\u00e1hle skoky ako skuto\u010dn\u00fd vysokofrekven\u010dn\u00fd obsah, ktor\u00fd v zariaden\u00ed neexistuje. Energia, ktor\u00e1 skuto\u010dne patr\u00ed k jedn\u00e9mu diskr\u00e9tnemu <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/frequency\/\">frekvencia<\/a> vrchol je rozmazan\u00fd \u2013 \u201epresahuje\u201c \u2013 do susedn\u00fdch frekven\u010dn\u00fdch p\u00e1siem na oboch stran\u00e1ch. Z toho vypl\u00fdvaj\u00fa tri d\u00f4sledky:<\/p>\n<ul>\n<li><strong>Zn\u00ed\u017een\u00e1 presnos\u0165 amplit\u00fady:<\/strong> nameran\u00e1 v\u00fd\u0161ka vrcholu je ni\u017e\u0161ia ako jej skuto\u010dn\u00e1 hodnota, preto\u017ee sa jej energia rozlo\u017eila do viacer\u00fdch intervalov namiesto toho, aby sa s\u00fastredila do jedn\u00e9ho.<\/li>\n<li><strong>Roz\u0161\u00edren\u00e9 vrcholy:<\/strong> krivka sa jav\u00ed \u0161ir\u0161ia a menej ostro ohrani\u010den\u00e1, ne\u017e by zodpovedalo fyzik\u00e1lnym z\u00e1konitostiam, \u010do vedie k nepresn\u00e9mu odhadu frekvencie.<\/li>\n<li><strong>Zn\u00ed\u017eenie rozl\u00ed\u0161enia:<\/strong> rozpt\u00fdlen\u00e1 energia zdvihne \u0161umov\u00fa hladinu okolo ve\u013ek\u00e9ho vrcholu a zakryje men\u0161ie susedn\u00e9 vrcholy \u2013 pr\u00e1ve tie mal\u00e9 <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/harmonics\/\">harmonick\u00e9<\/a> a postrann\u00e9 p\u00e1sma, ktor\u00e9 \u010dasto obsahuj\u00fa diagnostick\u00e9 inform\u00e1cie.<\/li>\n<\/ul>\n<h2>3. Rie\u0161enie: Pou\u017eitie okna<\/h2>\n<p>Funkcia Windowing odstra\u0148uje \u00faniky t\u00fdm, \u017ee plynulo presmeruje sign\u00e1l do <em>pozrite sa na<\/em> periodick\u00fd v r\u00e1mci bloku. Vyn\u00e1soben\u00edm surov\u00e9ho priebehu sign\u00e1lu oknom sa amplit\u00fady na \u00faplnom za\u010diatku a konci zn\u00ed\u017eia na nulu, \u010d\u00edm sa odstr\u00e1nia hrani\u010dn\u00e9 diskontinuity a v podstate sa FFT \u201eoklame\u201c, aby vn\u00edmala sign\u00e1l ako s\u00favisl\u00fd a bez medzier. V\u00fdsledkom je v\u00fdrazne \u010distej\u0161ie spektrum:<\/p>\n<ul>\n<li>V\u00fdrazne sa zv\u00fd\u0161ila presnos\u0165 merania amplit\u00fady, tak\u017ee v\u00fd\u0161ky \u0161pi\u010diek s\u00fa spo\u013eahliv\u00e9 <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/vibration-severity\/\">intenzita vibr\u00e1ci\u00ed<\/a> limity.<\/li>\n<li>Ostrej\u0161ie a lep\u0161ie vymedzen\u00e9 frekven\u010dn\u00e9 vrcholy, ktor\u00e9 umo\u017e\u0148uj\u00fa priradi\u0165 poruchu ku konkr\u00e9tnemu r\u00e1du alebo komponentu.<\/li>\n<li>Ni\u017e\u0161ia efekt\u00edvna \u00farove\u0148 \u0161umu, v\u010faka \u010domu vynikn\u00fa aj slab\u00e9 sign\u00e1ly ved\u013ea siln\u00fdch.<\/li>\n<\/ul>\n<p>Je to nevyhnutne kompromis. Z\u00fa\u017eenie koncov vedie k strate \u010dasti energie z\u00e1znamu a k miernemu roz\u0161\u00edreniu hlavn\u00e9ho spektr\u00e1lneho laloku, tak\u017ee pou\u017eitie okien znamen\u00e1 v\u00fdmenu \u010dasti frekven\u010dn\u00e9ho rozl\u00ed\u0161enia za v\u00fdrazn\u00e9 zn\u00ed\u017eenie presahu. Ka\u017ed\u00e9 okno predstavuje in\u00fd bod tohto kompromisu, a preto existuje viacero tvarov.<\/p>\n<h2>4. Be\u017en\u00e9 typy okien<\/h2>\n<p>Bolo vyvinut\u00fdch desiatky okenn\u00fdch funkci\u00ed, z ktor\u00fdch ka\u017ed\u00e1 v\u00e1\u017ei \u010dasov\u00fd blok trochu inak. Pri be\u017enej pr\u00e1ci so strojmi prevl\u00e1da jedna z nich.<\/p>\n<h3>Hanningovo okno<\/h3>\n<p>Str\u00e1nka <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/hanning-window\/\">Hanningovo okno<\/a> (vyhladzovacia funkcia typu \u201eraised-cosine\u201c) pon\u00faka vynikaj\u00faci kompromis medzi frekven\u010dn\u00fdm rozl\u00ed\u0161en\u00edm a presnos\u0165ou amplit\u00fady a je odpor\u00fa\u010dan\u00fdm predvolen\u00fdm nastaven\u00edm prakticky pre v\u0161etky \u0161tandardn\u00e9 merania vibr\u00e1ci\u00ed rota\u010dn\u00fdch strojov. Pokia\u013e neexistuje konkr\u00e9tny d\u00f4vod na in\u00fd postup, malo by sa v\u017edy zvoli\u0165 Hanningovo okno. Je to spr\u00e1vna vo\u013eba pre spojit\u00e9, \u0161iroko periodick\u00e9 sign\u00e1ly, ktor\u00e9 prevl\u00e1daj\u00fa <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/condition-monitoring\/\">monitorovanie stavu<\/a>.<\/p>\n<h3>Ostatn\u00e9 okn\u00e1<\/h3>\n<ul>\n<li><strong>Obd\u013a\u017enikov\u00e9 okno (tie\u017e naz\u00fdvan\u00e9 \u201eUniform\u201c alebo \u201eNone\u201c):<\/strong> \u010do je rovnak\u00e9, ako keby sa nepou\u017eilo \u017eiadne okno. M\u00e1 najlep\u0161ie frekven\u010dn\u00e9 rozl\u00ed\u0161enie, ale najhor\u0161ie spektr\u00e1lne \u00faniky, a je vhodn\u00e9 len vtedy, ak je zn\u00e1me, \u017ee sign\u00e1l je v r\u00e1mci bloku dokonale periodick\u00fd \u2013 alebo pri sn\u00edman\u00ed ve\u013emi ostr\u00fdch, \u00faplne ohrani\u010den\u00fdch prechodn\u00fdch udalost\u00ed, ako je napr\u00edklad n\u00e1raz.<\/li>\n<li><strong>Ploch\u00e9 okno:<\/strong> poskytuje najpresnej\u0161ie meranie amplit\u00fady zo v\u0161etk\u00fdch be\u017en\u00fdch okien, av\u0161ak za cenu ve\u013emi n\u00edzkeho frekven\u010dn\u00e9ho rozl\u00ed\u0161enia (ve\u013emi \u0161irok\u00e9 vrcholy). Je to preferovan\u00e9 okno pre kalibra\u010dn\u00e9 pr\u00e1ce a ak\u00fako\u013evek \u00falohu, kde je potrebn\u00e1 presn\u00e1 <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/amplitude\/\">amplit\u00fada<\/a> ako je presn\u00e1 frekvencia \u2014 napr\u00edklad pri overovan\u00ed senzora vo\u010di <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/calibration-certificate\/\">kalibra\u010dn\u00fd certifik\u00e1t<\/a> na zn\u00e1mej referen\u010dnej vibra\u010dnej komore.<\/li>\n<li><strong>Hammingovo okno:<\/strong> \u00fazko s\u00favis\u00ed s Hanningov\u00fdm oknom, s nepatrn\u00fdmi kompromismi v spr\u00e1van\u00ed sa bo\u010dn\u00fdch lalokov; pri be\u017enej diagnostike strojov sa vyu\u017e\u00edva len zriedka.<\/li>\n<\/ul>\n<h2>5. Kedy pou\u017ei\u0165 okno \u2013 a ako to s\u00favis\u00ed s rozl\u00ed\u0161en\u00edm<\/h2>\n<p>Pri monitorovan\u00ed stavu strojov plat\u00ed jednoduch\u00e9 pravidlo: <strong>v\u017edy pou\u017e\u00edvajte Hanningovo okno<\/strong> pre v\u0161eobecn\u00fa spektr\u00e1lnu anal\u00fdzu. Vypnutie okna \u2013 v\u00fdber mo\u017enosti \u201eRectangular\u201c pri be\u017enom sign\u00e1li \u2013 vedie k nepresn\u00fdm a potenci\u00e1lne zav\u00e1dzaj\u00facim \u00fadajom, preto\u017ee \u00fanik sign\u00e1lu skresl\u00ed v\u00fd\u0161ky p\u00edkov aj zdanliv\u00fa \u00farove\u0148 \u0161umu. Modern\u00e9 pr\u00edstroje \u0161tandardne pou\u017e\u00edvaj\u00fa Hanningovo okno pr\u00e1ve preto, \u017ee je nevyhnutn\u00e9 pre spo\u013eahliv\u00e9 a presn\u00e9 spektrum.<\/p>\n<p>Funkcia okienkovania nep\u00f4sob\u00ed samostatne. Ke\u010f\u017ee z\u00fa\u017eenie spektra roz\u0161iruje ka\u017ed\u00fa spektr\u00e1lnu \u010diaru, dosiahnut\u00e9 praktick\u00e9 frekven\u010dn\u00e9 rozl\u00ed\u0161enie je kombinovan\u00fdm v\u00fdsledkom v\u00fdberu okna a parametrov anal\u00fdzy \u2013 d\u013a\u017eky bloku (po\u010dtu vzoriek), vzorkovacej frekvencie a rozsahu. Ak s\u00fa p\u00edky ve\u013emi bl\u00edzko pri sebe, ich ostrenie je r\u00fdchlej\u0161ie pri pred\u013a\u017een\u00ed \u010dasov\u00e9ho z\u00e1znamu ne\u017e pri zmene okna; tento kompromis si m\u00f4\u017eete predbe\u017ene prezrie\u0165 pomocou <a href=\"https:\/\/vibromera.eu\/sk\/calculators\/fft-resolution-calculator\/\">Kalkula\u010dka rozl\u00ed\u0161enia FFT<\/a> predt\u00fdm, ako sa rozhodnete pre konkr\u00e9tne meracie usporiadanie. Met\u00f3da okien sa tie\u017e odli\u0161uje od a z\u00e1rove\u0148 dop\u013a\u0148a <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/signal-filtering\/\">filtrovanie sign\u00e1lu<\/a>: filter odstra\u0148uje zo sign\u00e1lu ne\u017eiaduce frekven\u010dn\u00e9 p\u00e1sma, zatia\u013e \u010do okno upravuje zost\u00e1vaj\u00face p\u00e1smo tak, aby ho FFT mohla verne zobrazi\u0165.<\/p>\n<h2>6. Okienkovanie v praxi<\/h2>\n<p>Pri praktickej diagnostike sa analytik zriedka vedome zameriava na okno \u2013 a to je z\u00e1merom. Ke\u010f technik zaznamen\u00e1va spektrum alebo vykon\u00e1va vyva\u017eovanie pomocou prenosn\u00e9ho dvojkan\u00e1lov\u00e9ho pr\u00edstroja, ako je napr\u00edklad <a href=\"https:\/\/vibromera.eu\/sk\/produkt\/balanset-1\/\">Balanset-1A<\/a>, softv\u00e9r automaticky pou\u017eije Hanningovo okno pred v\u00fdpo\u010dtom FFT, tak\u017ee 1\u00d7 <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/running-speed\/\">r\u00fdchlos\u0165 behu<\/a> vrchol a jeho harmonick\u00e9 zlo\u017eky sa zobrazuj\u00fa so skuto\u010dnou amplit\u00fadou a spr\u00e1vnou frekvenciou bez ak\u00fdchko\u013evek \u010fal\u0161\u00edch krokov. Pr\u00e1ve toto spr\u00e1vne okienkovan\u00e9 spektrum umo\u017e\u0148uje tomu ist\u00e9mu pr\u00edstroju odl\u00ed\u0161i\u0165 skuto\u010dn\u00fd <a href=\"https:\/\/vibromera.eu\/sk\/glossary\/unbalance\/\">nevyv\u00e1\u017eenos\u0165<\/a> odstr\u00e1ni\u0165 \u0161pi\u010dky sp\u00f4soben\u00e9 okolit\u00fdm \u0161umom a overi\u0165 v\u00fdsledok po korekcii. Pochopenie toho, ako okno funguje \u201epod kapotou\u201c, pom\u00e1ha analytikovi rozpozna\u0165, kedy je skuto\u010dne opodstatnen\u00e9 pou\u017ei\u0165 in\u00e9 ako predvolen\u00e9 nastavenie \u2013 napr\u00edklad Flattop na kontrolu kalibr\u00e1cie alebo Rectangular na \u010dist\u00fd prechodov\u00fd sign\u00e1l.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/sk\/glossary\/\">\u2190 Sp\u00e4\u0165 na hlavn\u00fd index<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Sprievodca okenn\u00fdmi funkciami (ako Hanning) v FFT anal\u00fdze. Zistite, pre\u010do je oknovanie nevyhnutn\u00e9 pre minimaliz\u00e1ciu spektr\u00e1lneho \u00faniku a zabezpe\u010denie presn\u00fdch meran\u00ed vibr\u00e1ci\u00ed.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[114,109],"tags":[],"class_list":["post-311","glossary","type-glossary","status-publish","hentry","category-analysis","category-glossary"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/glossary\/311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/glossary\/311\/revisions"}],"predecessor-version":[{"id":101322,"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/glossary\/311\/revisions\/101322"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/media?parent=311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/categories?post=311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/sk\/wp-json\/wp\/v2\/tags?post=311"}],"curies":[{"name":"pracovn\u00fd list","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}