{"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\/hu\/glossary\/windowing\/","title":{"rendered":"Mi az ablakoz\u00e1s az FFT anal\u00edzisben?"},"content":{"rendered":"<h1>Ablakkezel\u00e9s meg\u00e9rt\u00e9se az FFT anal\u00edzisben<\/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\/hu\/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\/hu\/product\/balanset-1\/\" title=\"Hordozhat\u00f3 kiegyens\u00falyoz\u00f3 \u00e9s rezg\u00e9selemz\u0151 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=\"Balanset-1A teljes k\u00e9szlet\u0171 hordozhat\u00f3 kiegyens\u00falyoz\u00f3 \u00e9s rezg\u00e9selemz\u0151 k\u00e9sz\u00fcl\u00e9k\" 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\/hu\/product-category\/devices\/\" rel=\"tag\">Eszk\u00f6z\u00f6k<\/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\/hu\/product\/balanset-1\/\" title=\"Hordozhat\u00f3 kiegyens\u00falyoz\u00f3 \u00e9s rezg\u00e9selemz\u0151 Balanset-1A\">Hordozhat\u00f3 kiegyens\u00falyoz\u00f3 \u00e9s rezg\u00e9selemz\u0151 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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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\/hu\/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\/hu\/product\/vibration-sensor\/\" title=\"Rezg\u00e9s\u00e9rz\u00e9kel\u0151\">\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=\"Balanset-1A rezg\u00e9s\u00e9rz\u00e9kel\u0151 k\u00f6zelr\u0151l\" 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\/hu\/product-category\/parts\/\" rel=\"tag\">Alkatr\u00e9szek<\/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\/hu\/product\/vibration-sensor\/\" title=\"Rezg\u00e9s\u00e9rz\u00e9kel\u0151\">Rezg\u00e9s\u00e9rz\u00e9kel\u0151<\/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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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\/hu\/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\/hu\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optikai \u00e9rz\u00e9kel\u0151 (l\u00e9zeres fordulatsz\u00e1mm\u00e9r\u0151)\">\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=\"Optikai \u00e9rz\u00e9kel\u0151 (l\u00e9zeres fordulatsz\u00e1mm\u00e9r\u0151)\" 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\/hu\/product-category\/parts\/\" rel=\"tag\">Alkatr\u00e9szek<\/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\/hu\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optikai \u00e9rz\u00e9kel\u0151 (l\u00e9zeres fordulatsz\u00e1mm\u00e9r\u0151)\">Optikai \u00e9rz\u00e9kel\u0151 (l\u00e9zeres fordulatsz\u00e1mm\u00e9r\u0151)<\/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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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\/hu\/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\/hu\/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=\"Vibromera rotor kiegyens\u00falyoz\u00f3 k\u00e9szlet: hordt\u00e1ska, t\u00f6bbcsatorn\u00e1s jel\u00e1talak\u00edt\u00f3, k\u00e9zi analiz\u00e1tor, m\u00e1gneses talp, rezg\u00e9s\u00e9rz\u00e9kel\u0151k \u00e9s tekercselt k\u00e1belek.\" 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\/hu\/product-category\/devices\/\" rel=\"tag\">Eszk\u00f6z\u00f6k<\/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\/hu\/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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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\/hu\/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\/hu\/product\/magnet-stand\/\" title=\"M\u00e1gneses \u00e1llv\u00e1ny 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=\"M\u00e1gneses alap.\" 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\/hu\/product-category\/parts\/\" rel=\"tag\">Alkatr\u00e9szek<\/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\/hu\/product\/magnet-stand\/\" title=\"M\u00e1gneses \u00e1llv\u00e1ny Insize-60-kgf\">M\u00e1gneses \u00e1llv\u00e1ny 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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cMagnetic Stand Insize-60-kgf\u201d\" rel=\"nofollow\" data-success_message=\"\u201cMagnetic Stand Insize-60-kgf\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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\/hu\/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\/hu\/product\/reflective-tape\/\" title=\"F\u00e9nyvisszaver\u0151 szalag\">\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=\"F\u00e9nyvisszaver\u0151 szalag\" 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\/hu\/product-category\/parts\/\" rel=\"tag\">Alkatr\u00e9szek<\/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\/hu\/product\/reflective-tape\/\" title=\"F\u00e9nyvisszaver\u0151 szalag\">F\u00e9nyvisszaver\u0151 szalag<\/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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cReflective tape\u201d\" rel=\"nofollow\" data-success_message=\"\u201cReflective tape\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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\/hu\/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\/hu\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dinamikus kiegyens\u00falyoz\u00f3 &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=\"Balanset-1A k\u00e9szlet tartalma interf\u00e9sz egys\u00e9ggel, \u00e9rz\u00e9kel\u0151kkel, tachom\u00e9terrel \u00e9s tartoz\u00e9kokkal\" 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\/hu\/product-category\/devices\/\" rel=\"tag\">Eszk\u00f6z\u00f6k<\/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\/hu\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dinamikus kiegyens\u00falyoz\u00f3 &quot;Balanset-1A&quot; OEM\">Dinamikus kiegyens\u00falyoz\u00f3 \"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> + \u00c1FA (ha alkalmazand\u00f3)<\/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=\"\/hu\/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=\"Kos\u00e1rba teszem\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Kos\u00e1rba teszem\" 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=\"\/hu\/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=\"Kos\u00e1rba: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d has been added to your cart\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Kos\u00e1rba teszem<\/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>Ablakoz\u00e1s<\/strong> egy jelfeldolgoz\u00e1si l\u00e9p\u00e9s, amelynek sor\u00e1n egy matematikai s\u00falyoz\u00f3 f\u00fcggv\u00e9nyt \u2013 egy \u201eablakot\u201d \u2013 alkalmaznak egy <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/time-waveform\/\">id\u0151beli lefoly\u00e1s<\/a> az adatokat, miel\u0151tt azokat a gyors Fourier-transzform\u00e1ci\u00f3ba tov\u00e1bb\u00edtj\u00e1k. Az ablak alakja az id\u0151tartom\u00e1ny elej\u00e9n \u00e9s v\u00e9g\u00e9n fokozatosan null\u00e1ra cs\u00f6kkenti a r\u00f6gz\u00edtett jel amplit\u00fad\u00f3j\u00e1t, \u00edgy az adatok hirtelen ugr\u00e1sok n\u00e9lk\u00fcl illeszkednek egym\u00e1shoz. Ez az egyetlen m\u0171velet sz\u0171ri ki azt a gyakori hib\u00e1t, amelyet <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/spectral-leakage\/\">spektr\u00e1lis sziv\u00e1rg\u00e1s<\/a> \u00e9s ez\u00e9rt elengedhetetlen a pontos eredm\u00e9nyek el\u00e9r\u00e9s\u00e9hez <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/spectrum\/\">rezg\u00e9si spektrum<\/a>. A gyakorlatban <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/vibration-analysis\/\">rezg\u00e9selemz\u00e9s<\/a>\u2026 az ablak megfelel\u0151 kiv\u00e1laszt\u00e1sa \u00e9s alkalmaz\u00e1sa d\u00f6nti el, hogy tiszta, megb\u00edzhat\u00f3 spektrumot kapunk-e, vagy elmos\u00f3dott, f\u00e9lrevezet\u0151 k\u00e9pet.<\/p>\n<h2>1. Fogalommeghat\u00e1roz\u00e1s: Mi az ablakos\u00edt\u00f3 f\u00fcggv\u00e9ny?<\/h2>\n<p>Az ablakf\u00fcggv\u00e9ny egy profil \u2013 mintav\u00e9telenk\u00e9nt egy-egy szorz\u00f3sz\u00e1mb\u00f3l \u00e1ll\u00f3 halmaz \u2013, amelyet a nyers id\u0151blokk f\u00f6l\u00e9 helyez\u00fcnk. Ahol az ablak \u00e9rt\u00e9ke 1,0, ott a minta v\u00e1ltozatlanul halad \u00e1t; ahol 0,0 fel\u00e9 cs\u00f6kken, ott a minta csillapodik. Mivel szinte minden ablak k\u00f6zep\u00e9n \u00e9ri el a cs\u00facsot, \u00e9s mindk\u00e9t v\u00e9g\u00e9n elv\u00e9konyodik, az id\u0151sor ablakkal val\u00f3 szorz\u00e1sa azt eredm\u00e9nyezi, hogy a r\u00f6gz\u00edtett szelet amplit\u00fad\u00f3ja null\u00e1r\u00f3l indul \u00e9s null\u00e1n v\u00e9gz\u0151dik. A <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/fft\/\">FFT<\/a> v\u00e1ltozatlanok maradnak; az ablakoz\u00e1s csup\u00e1n el\u0151k\u00e9sz\u00edti az adatokat, hogy megfeleljenek az \u00e1talak\u00edt\u00e1s be\u00e9p\u00edtett felt\u00e9telez\u00e9seinek. En\u00e9lk\u00fcl az elemz\u0151 \u00e1ltal visszaadott spektrum mennyis\u00e9gileg hib\u00e1s lehet, m\u00e9g akkor is, ha az \u00e9rz\u00e9kel\u0151 \u00e9s a m\u00e9r\u00e9si l\u00e1nc t\u00f6bbi r\u00e9sze t\u00f6k\u00e9letesen m\u0171k\u00f6dik.<\/p>\n<h2>2. A probl\u00e9ma: spektr\u00e1lis sziv\u00e1rg\u00e1s<\/h2>\n<p>Az FFT-nek van egy alapvet\u0151 felt\u00e9telez\u00e9se: az \u00e1ltala elemzett v\u00e9ges id\u0151sor-blokkot \u00fagy kezeli, mint <em>egy t\u00f6k\u00e9letesen periodikus jel egy teljes ciklusa, amely \u00f6r\u00f6kk\u00e9 ism\u00e9tl\u0151dik<\/em>. A val\u00f3s g\u00e9pek jelei szinte soha nem viselkednek kisz\u00e1m\u00edthat\u00f3an. Mivel a mintav\u00e9tel tetsz\u0151leges pillanatokban kezd\u0151dik \u00e9s v\u00e9gz\u0151dik, a r\u00f6gz\u00edtett blokk v\u00e9ge nem esik egy vonalba a kezdet\u00e9vel, \u00edgy amikor az FFT a blokkot ment\u00e1lisan visszakapcsolja \u00f6nmag\u00e1ra, \u00e9les, mesters\u00e9ges folytonoss\u00e1gi hi\u00e1nyokat \u00e9szlel a hat\u00e1rokon.<\/p>\n<p>A transzform\u00e1ci\u00f3 ezeket a hirtelen ugr\u00e1sokat val\u00f3di, magas frekvenci\u00e1j\u00fa tartalomk\u00e9nt \u00e9rtelmezi, amely a k\u00e9sz\u00fcl\u00e9kben val\u00f3j\u00e1ban nem l\u00e9tezik. Az az energia, amely val\u00f3j\u00e1ban egyetlen, diszkr\u00e9t <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/frequency\/\">frekvencia<\/a> a cs\u00facs elmos\u00f3dik \u2013 \u201e\u00e1tfolyik\u201d \u2013 a szomsz\u00e9dos frekvenciatartom\u00e1nyokba mindk\u00e9t oldalon. Ennek h\u00e1rom k\u00f6vetkezm\u00e9nye van:<\/p>\n<ul>\n<li><strong>Cs\u00f6kkent amplit\u00fad\u00f3-pontoss\u00e1g:<\/strong> a cs\u00facs m\u00e9rt magass\u00e1ga alacsonyabbnak t\u0171nik a val\u00f3s \u00e9rt\u00e9k\u00e9n\u00e9l, mivel energi\u00e1ja nem egy egyetlen tartom\u00e1nyba koncentr\u00e1l\u00f3dott, hanem sz\u00e1mos tartom\u00e1nyra oszlott sz\u00e9t.<\/li>\n<li><strong>Sz\u00e9lesed\u0151 cs\u00facsok:<\/strong> a g\u00f6rbe sz\u00e9lesebbnek \u00e9s kev\u00e9sb\u00e9 \u00e9lesnek t\u0171nik, mint amit a m\u00f6g\u00f6ttes fizikai t\u00f6rv\u00e9nyek indokoln\u00e1nak, ami elmos\u00f3dott\u00e1 teszi a frekvenciabecsl\u00e9st.<\/li>\n<li><strong>Felbont\u00e1scs\u00f6kken\u00e9s:<\/strong> a sz\u00e9tterjed\u0151 energia a zajszintet egy nagy cs\u00facs k\u00f6r\u00fcl megemeli, elnyomva a szomsz\u00e9dos kisebb cs\u00facsokat \u2014 pontosan azokat a kis <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/harmonics\/\">felharmonikusok<\/a> \u00e9s az oldals\u00e1vok, amelyek gyakran hordozz\u00e1k a diagnosztikai inform\u00e1ci\u00f3kat.<\/li>\n<\/ul>\n<h2>3. A megold\u00e1s: ablak beilleszt\u00e9se<\/h2>\n<p>Az ablakoz\u00e1s \u00fagy sz\u00fcnteti meg a sziv\u00e1rg\u00e1st, hogy a jelet z\u00f6kken\u0151mentesen <em>look<\/em> a blokkon bel\u00fcl periodikus. A nyers hull\u00e1mforma \u00e9s az ablak szorzat\u00e1nak eredm\u00e9nyek\u00e9nt a hull\u00e1m amplit\u00fad\u00f3ja a kezdeti \u00e9s v\u00e9gs\u0151 pontokban null\u00e1ra cs\u00f6kken, ami kik\u00fcsz\u00f6b\u00f6li a hat\u00e1r\u00e9rt\u00e9kekn\u00e9l jelentkez\u0151 folytonoss\u00e1gi hi\u00e1nyokat, \u00e9s \u00edgy gyakorlatilag \u201er\u00e1veszi\u201d az FFT-t, hogy folytonos, h\u00e9zagmentes jelet \u00e9rz\u00e9keljen. Ennek eredm\u00e9nyek\u00e9nt l\u00e9nyegesen tiszt\u00e1bb spektrumot kapunk:<\/p>\n<ul>\n<li>Az amplit\u00fad\u00f3 pontoss\u00e1ga jelent\u0151sen javult, \u00edgy a cs\u00facsmagass\u00e1gok megb\u00edzhat\u00f3ak <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/vibration-severity\/\">rezg\u00e9sintenzit\u00e1s<\/a> korl\u00e1tok.<\/li>\n<li>\u00c9lesebb, jobban k\u00f6r\u00fclhat\u00e1rolt frekvenciacs\u00facsok, amelyek a hib\u00e1t egy adott rendhez vagy alkatr\u00e9szhez k\u00f6thetik.<\/li>\n<li>Alacsonyabb effekt\u00edv zajszint, amely lehet\u0151v\u00e9 teszi, hogy a kis jelek is j\u00f3l kiemelkedjenek a nagyok mellett.<\/li>\n<\/ul>\n<p>Ez term\u00e9szetesen kompromisszummal j\u00e1r. A v\u00e9gek lekerek\u00edt\u00e9se a felv\u00e9tel energi\u00e1j\u00e1nak egy r\u00e9sz\u00e9t elvesz\u00edti, \u00e9s kiss\u00e9 kisz\u00e9les\u00edti a f\u0151 spektr\u00e1lis cs\u00facsot, \u00edgy az ablakoz\u00e1s a sziv\u00e1rg\u00e1s jelent\u0151s cs\u00f6kkent\u00e9se \u00e9rdek\u00e9ben cser\u00e9be egy kis frekvenciafelbont\u00e1st \u00e1ldoz fel. Minden ablak egy m\u00e1sik pontot jelent ezen a kompromisszumon, ez\u00e9rt is l\u00e9teznek k\u00fcl\u00f6nb\u00f6z\u0151 alakzatok.<\/p>\n<h2>4. A leggyakoribb ablakfajt\u00e1k<\/h2>\n<p>T\u00f6bb tucat ablakos\u00edt\u00e1si f\u00fcggv\u00e9nyt dolgoztak ki, amelyek mindegyike kiss\u00e9 elt\u00e9r\u0151 m\u00f3don s\u00falyozza az id\u0151blokkot. Az \u00e1ltal\u00e1nos c\u00e9l\u00fa g\u00e9pi munk\u00e1k eset\u00e9ben egy k\u00f6z\u00fcl\u00fck domin\u00e1l.<\/p>\n<h3>Hanning ablak<\/h3>\n<p>A <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/hanning-window\/\">Hanning-ablak<\/a> (egy emelt-koszinuszos lefut\u00e1s\u00fa ablak) kiv\u00e1l\u00f3 kompromisszumot jelent a frekvenciafelbont\u00e1s \u00e9s az amplit\u00fad\u00f3-pontoss\u00e1g k\u00f6z\u00f6tt, \u00e9s gyakorlatilag minden szabv\u00e1nyos forg\u00f3g\u00e9p-rezg\u00e9sm\u00e9r\u00e9sn\u00e9l ez az aj\u00e1nlott alapbe\u00e1ll\u00edt\u00e1s. Ha nincs k\u00fcl\u00f6n\u00f6sebb ok az ellenkez\u0151j\u00e9re, mindig a Hanning-ablakot kell v\u00e1lasztani. Ez a megfelel\u0151 v\u00e1laszt\u00e1s azokhoz a folyamatos, nagyj\u00e1b\u00f3l periodikus jelekhez, amelyek domin\u00e1lnak <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/condition-monitoring\/\">\u00e1llapotfel\u00fcgyelet<\/a>.<\/p>\n<h3>Egy\u00e9b ablakok<\/h3>\n<ul>\n<li><strong>T\u00e9glalap alak\u00fa ablak (m\u00e1s n\u00e9ven \u201eUniform\u201d vagy \u201eNone\u201d):<\/strong> ez azzal egyen\u00e9rt\u00e9k\u0171, mintha egy\u00e1ltal\u00e1n nem alkalmazn\u00e1nk ablakot. Ez a m\u00f3dszer a legjobb frekvenciafelbont\u00e1ssal rendelkezik, de a legrosszabb spektr\u00e1lis sziv\u00e1rg\u00e1ssal j\u00e1r, \u00e9s csak akkor alkalmazhat\u00f3, ha biztosan tudjuk, hogy a jel a blokkon bel\u00fcl t\u00f6k\u00e9letesen periodikus \u2013 vagy ha nagyon \u00e9les, teljesen z\u00e1rt tranziens esem\u00e9nyeket r\u00f6gz\u00edt\u00fcnk, p\u00e9ld\u00e1ul egy \u00fctk\u00f6z\u00e9st.<\/li>\n<li><strong>Flattop ablak:<\/strong> a legpontosabb amplit\u00fad\u00f3m\u00e9r\u00e9st biztos\u00edtja az \u00f6sszes \u00e1ltal\u00e1nosan haszn\u00e1lt ablak k\u00f6z\u00fcl, cser\u00e9be azonban nagyon gyenge frekvenciafelbont\u00e1ssal j\u00e1r (nagyon sz\u00e9les cs\u00facsok). Ez a legalkalmasabb ablak kalibr\u00e1l\u00e1si munk\u00e1khoz \u00e9s minden olyan feladathoz, ahol a pontos <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/amplitude\/\">amplit\u00fad\u00f3<\/a> a cs\u00facs jellege fontosabb, mint annak pontos frekvenci\u00e1ja \u2013 p\u00e9ld\u00e1ul egy \u00e9rz\u00e9kel\u0151 ellen\u0151rz\u00e9se egy <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/calibration-certificate\/\">kalibr\u00e1l\u00e1si tan\u00fas\u00edtv\u00e1ny<\/a> egy ismert referencia-r\u00e1z\u00f3g\u00e9pen.<\/li>\n<li><strong>Hamming-ablak:<\/strong> szoros kapcsolatban \u00e1ll a Hanning-ablakkal, az oldalsug\u00e1r-viselked\u00e9s ter\u00e9n kisebb kompromisszumokkal j\u00e1r; a rutin g\u00e9pdiagnosztik\u00e1ban ritk\u00e1n van r\u00e1 sz\u00fcks\u00e9g.<\/li>\n<\/ul>\n<h2>5. Mikor \u00e9rdemes ablakot haszn\u00e1lni \u2013 \u00e9s hogyan f\u00fcgg ez \u00f6ssze a felbont\u00e1ssal<\/h2>\n<p>A g\u00e9pek \u00e1llapotfigyel\u00e9se eset\u00e9ben az alapelv egyszer\u0171: <strong>mindig haszn\u00e1ljon Hanning ablakot<\/strong> az \u00e1ltal\u00e1nos spektrumanal\u00edzishez. Az ablak letilt\u00e1sa \u2013 azaz a \u201eRectangular\u201d (T\u00e9glalap) opci\u00f3 kiv\u00e1laszt\u00e1sa egy szok\u00e1sos fut\u00f3 jel eset\u00e9n \u2013 pontatlan \u00e9s potenci\u00e1lisan f\u00e9lrevezet\u0151 adatokat eredm\u00e9nyez, mivel a sziv\u00e1rg\u00e1s torz\u00edtja mind a cs\u00facsmagass\u00e1gokat, mind a l\u00e1tsz\u00f3lagos zajszintet. A modern m\u0171szerek alap\u00e9rtelmez\u00e9sk\u00e9nt a Hanning-ablakot alkalmazz\u00e1k, pontosan az\u00e9rt, mert ez elengedhetetlen a megb\u00edzhat\u00f3, pontos spektrumhoz.<\/p>\n<p>Az ablakoz\u00e1s nem \u00f6nmag\u00e1ban hat. Mivel a k\u00fapos kisz\u0171r\u00e9s kisz\u00e9les\u00edti az egyes spektr\u00e1lis vonalakat, a gyakorlatban el\u00e9rhet\u0151 frekvenciafelbont\u00e1s az ablakv\u00e1laszt\u00e1s \u00e9s az elemz\u00e9si param\u00e9terek \u2013 blokkhossz (mintasz\u00e1m), mintav\u00e9teli frekvencia \u00e9s tartom\u00e1ny \u2013 egy\u00fcttes eredm\u00e9nye. Ha a cs\u00facsok nagyon k\u00f6zel helyezkednek el egym\u00e1shoz, a felv\u00e9tel id\u0151tartam\u00e1nak meghosszabb\u00edt\u00e1sa gyorsabban \u00e9les\u00edti \u0151ket, mint az ablak megv\u00e1ltoztat\u00e1sa; ezt a kompromisszumot megtekintheti egy <a href=\"https:\/\/vibromera.eu\/hu\/calculators\/fft-resolution-calculator\/\">FFT felbont\u00e1s-kalkul\u00e1tor<\/a> miel\u0151tt v\u00e9glegesen r\u00f6gz\u00edten\u00e9nk a m\u00e9r\u00e9si fel\u00e1ll\u00edt\u00e1st. Az ablakoz\u00e1s emellett elt\u00e9r a k\u00f6vetkez\u0151t\u0151l, \u00e9s kieg\u00e9sz\u00edti azt: <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/signal-filtering\/\">jel sz\u0171r\u00e9s<\/a>: a sz\u0171r\u0151 elt\u00e1vol\u00edtja a jelb\u0151l a nem k\u00edv\u00e1nt frekvencias\u00e1vokat, m\u00edg az ablak feldolgozza a megmaradt s\u00e1vokat, hogy az FFT azokat pontosan \u00e1br\u00e1zolhassa.<\/p>\n<h2>6. A terepi ablakkezel\u00e9s<\/h2>\n<p>A gyakorlati diagnosztik\u00e1ban az elemz\u0151 ritk\u00e1n gondol tudatosan az ablakra \u2013 \u00e9s ez sz\u00e1nd\u00e9kos. Amikor egy m\u00e9rn\u00f6k spektrumot r\u00f6gz\u00edt vagy kiegyens\u00falyoz\u00e1si feladatot hajt v\u00e9gre egy hordozhat\u00f3 k\u00e9tcsatorn\u00e1s m\u0171szerrel, mint p\u00e9ld\u00e1ul a <a href=\"https:\/\/vibromera.eu\/hu\/termek\/balanset-1\/\">Balanset-1A<\/a>, a szoftver az FFT kisz\u00e1m\u00edt\u00e1sa el\u0151tt automatikusan Hanning-ablakot alkalmaz, \u00edgy az 1\u00d7 <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/running-speed\/\">fut\u00f3sebess\u00e9g<\/a> a cs\u00facs \u00e9s harmonikusai val\u00f3di amplit\u00fad\u00f3jukban \u00e9s a megfelel\u0151 frekvenci\u00e1n jelennek meg, tov\u00e1bbi l\u00e9p\u00e9sek n\u00e9lk\u00fcl. Ez a helyesen ablakozott spektrum teszi lehet\u0151v\u00e9, hogy ugyanaz a m\u0171szer megk\u00fcl\u00f6nb\u00f6ztesse a val\u00f3di <a href=\"https:\/\/vibromera.eu\/hu\/glossary\/unbalance\/\">kiegyens\u00falyozatlans\u00e1g<\/a> kisz\u0171rni a k\u00f6zeli zajt, majd a korrekci\u00f3 ut\u00e1n ellen\u0151rizni az eredm\u00e9nyt. Ha az elemz\u0151 tiszt\u00e1ban van azzal, hogy az ablak pontosan hogyan m\u0171k\u00f6dik a h\u00e1tt\u00e9rben, k\u00f6nnyebben felismeri, mikor indokolt val\u00f3ban egy nem alap\u00e9rtelmezett be\u00e1ll\u00edt\u00e1s haszn\u00e1lata \u2013 p\u00e9ld\u00e1ul a Flattop a kalibr\u00e1ci\u00f3s ellen\u0151rz\u00e9shez, vagy a Rectangular egy tiszta tranziens jelhez.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/hu\/glossary\/\">\u2190 Vissza a f\u0151 tartalomjegyz\u00e9khez<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>\u00datmutat\u00f3 az ablakoz\u00e1si f\u00fcggv\u00e9nyekhez (mint p\u00e9ld\u00e1ul a Hanning) az FFT anal\u00edzisben. Ismerje meg, mi\u00e9rt elengedhetetlen az ablakoz\u00e1s a spektr\u00e1lis sziv\u00e1rg\u00e1s minimaliz\u00e1l\u00e1s\u00e1hoz \u00e9s a pontos rezg\u00e9sm\u00e9r\u00e9sek biztos\u00edt\u00e1s\u00e1hoz.<\/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\/hu\/wp-json\/wp\/v2\/glossary\/311","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/glossary\/311\/revisions"}],"predecessor-version":[{"id":101322,"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/glossary\/311\/revisions\/101322"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/media?parent=311"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/categories?post=311"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/hu\/wp-json\/wp\/v2\/tags?post=311"}],"curies":[{"name":"munkaf\u00fczet","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}