{"id":158,"date":"2025-10-31T00:25:51","date_gmt":"2025-10-31T00:25:51","guid":{"rendered":"https:\/\/vibromera.eu\/glossary\/low-pass-filter\/"},"modified":"2026-05-23T22:43:47","modified_gmt":"2026-05-23T22:43:47","slug":"low-pass-filter","status":"publish","type":"glossary","link":"https:\/\/vibromera.eu\/da\/glossary\/low-pass-filter\/","title":{"rendered":"Hvad er et lavpasfilter? Antialiasing og udj\u00e6vning"},"content":{"rendered":"<h1>Forst\u00e5else af lavpasfiltre<\/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\/da\/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\/da\/product\/balanset-1\/\" title=\"B\u00e6rbart afbalanceringsapparat og vibrationsanalysator 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 komplet s\u00e6t med b\u00e6rbar afbalanceringsenhed og vibrationsanalysator\" 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\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/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\/da\/product\/balanset-1\/\" title=\"B\u00e6rbart afbalanceringsapparat og vibrationsanalysator Balanset-1A\">B\u00e6rbart afbalanceringsapparat og vibrationsanalysator 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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"L\u00e6g i kurv: \u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d\" rel=\"nofollow\" data-success_message=\"\u201cPortable balancer &amp; Vibration analyzer Balanset-1A\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">\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 vibrationssensor i n\u00e6rbillede\" 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\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/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\/da\/product\/vibration-sensor\/\" title=\"Vibrationssensor\">Vibrationssensor<\/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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"L\u00e6g i kurv: \u201cVibration sensor\u201d\" rel=\"nofollow\" data-success_message=\"\u201cVibration sensor\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (laser-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=\"Optisk sensor (laser-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\/da\/product-category\/parts\/\" rel=\"tag\">Dele<\/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\/da\/product\/optical-sensor-for-balanset-and-arbalance\/\" title=\"Optisk sensor (laser-tachometer)\">Optisk sensor (laser-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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"L\u00e6g i kurv: \u201cOptical Sensor (Laser Tachometer)\u201d\" rel=\"nofollow\" data-success_message=\"\u201cOptical Sensor (Laser Tachometer)\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/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 rotorbalanceringss\u00e6t: b\u00e6retaske, flerkanals signalbehandler, h\u00e5ndholdt analysator, magnetisk base, vibrationssensorer og spiralkabler.\" 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\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/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\/da\/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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"L\u00e6g i kurv: \u201cBalanset-4\u201d\" rel=\"nofollow\" data-success_message=\"\u201cBalanset-4\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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\/da\/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\/da\/product\/magnet-stand\/\" title=\"Magnetisk stativ 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=\"Magnetbase.\" 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 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title=\"Dynamisk balancer &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-s\u00e6t med interface-enhed, sensorer, omdrejningst\u00e6ller og tilbeh\u00f8r\" 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, 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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\/da\/product-category\/devices\/\" rel=\"tag\">Enheder<\/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\/da\/product\/dynamic-balancer-balanset-1a\/\" title=\"Dynamisk balancer &quot;Balanset-1A&quot; OEM\">Dynamisk balancer \"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> + moms (hvis relevant)<\/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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"Tilf\u00f8j til kurv\" data-no-translation-title=\"\"><i rel=\"tooltip\" data-original-title=\"Tilf\u00f8j til kurv\" 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=\"\/da\/wp-json\/wp\/v2\/glossary\/158?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=\"L\u00e6g i kurv: \u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d\" rel=\"nofollow\" data-success_message=\"\u201cDynamic balancer \u201cBalanset-1A\u201d OEM\u201d er blevet tilf\u00f8jet til din kurv\" data-no-translation=\"\" data-trp-gettext=\"\" data-no-translation-aria-label=\"\" data-no-translation-data-success_message=\"\">Tilf\u00f8j til kurv<\/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>A <strong>Lavpasfilter<\/strong> (LPF) er et frekvensselektivt signalbehandlingselement, som tillader <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration\/\">vibrationer<\/a> komponenter under en valgt gr\u00e6nsefrekvens at passere gennem, mens komponenter over den d\u00e6mpes. I <a href=\"https:\/\/vibromera.eu\/da\/glossary\/vibration-analysis\/\">Vibrationsanalyse<\/a> udf\u00f8rer det tre opgaver, som en analyzer ikke kan klare uden: anti-aliasing (forebyggelse af falske frekvenser i digitale data), st\u00f8jreduktion og isolering af lavfrekvent omr\u00e5de til fokuseret analyse. Det er spejlbilledet af <a href=\"https:\/\/vibromera.eu\/da\/glossary\/high-pass-filter\/\">h\u00f8jpassfilter<\/a>, og de to er de byggesten til alle andre <a href=\"https:\/\/vibromera.eu\/da\/glossary\/signal-filtering\/\">signalfiltrering<\/a> scheme.<\/p>\n<p>Lavpasfiltre er uden tvivl de mest udbredt anvendte filtre i vibrationsinstrumentation. En sidder foran konverteren i alle digitaliseringssystemer som et obligatorisk anti-aliasing filter, og samme funktion tilbydes som analysev\u00e6rkt\u00f8j til glatning af data, fjernelse af h\u00f8jfrekvent st\u00f8j og fokus p\u00e5 lavfrekvent f\u00e6nomener. At forst\u00e5, hvordan de p\u00e5virker et signal, er s\u00e5ledes v\u00e6sentligt for at stole p\u00e5 enhver <a href=\"https:\/\/vibromera.eu\/da\/glossary\/spectrum\/\">spektrum<\/a> you read.<\/p>\n<h2>1. Filteregenskaber<\/h2>\n<h3>Gr\u00e6nsefrekvens (f<sub>c<\/sub>)<\/h3>\n<ul>\n<li><strong>Definition:<\/strong> den frekvens, hvor filterresponsen er faldet til &minus;3 dB, dvs. 70,7% af passb\u00e5ndsampliduden.<\/li>\n<li><strong>Below f<sub>c<\/sub> (passband):<\/strong> frekvenser passerer med minimal d\u00e6mpning.<\/li>\n<li><strong>Above f<sub>c<\/sub> (stopband):<\/strong> frekvenser d\u00e6mpes progressivt.<\/li>\n<li><strong>Transitzone:<\/strong> omr\u00e5det omkring f<sub>c<\/sub> hvor d\u00e6mpningen stiger gradvist.<\/li>\n<\/ul>\n<h3>Filterr\u00e6kkef\u00f8lge og afrulning<\/h3>\n<p>En filters orden bestemmer, hvor skarpt den skifter fra passband til stopband:<\/p>\n<ul>\n<li><strong>1st order:<\/strong> 6 dB\/oktav (20 dB\/dekade) \u2014 gradvis nedtoning.<\/li>\n<li><strong>2nd order:<\/strong> 12 dB\/oktav (40 dB\/dekade) \u2014 moderat.<\/li>\n<li><strong>4th order:<\/strong> 24 dB\/oktav (80 dB\/dekade) \u2014 brat.<\/li>\n<li><strong>8th order:<\/strong> 48 dB\/oktav (160 dB\/dekade) \u2014 meget brat.<\/li>\n<li><strong>Higher order:<\/strong> en skarpere overgang og bedre stopspalte-undertrykkelse, til prisen af mere faseforskydning og l\u00e6ngere transient-respons.<\/li>\n<\/ul>\n<h3>Filterresponstyper<\/h3>\n<p>Den samme gr\u00e6nsefrekvens og orden kan realiseres med forskellige matematiske former, som hver is\u00e6r handler om flatheden, skarphed og fase-opf\u00f8rsel:<\/p>\n<ul>\n<li><strong>Butterworth:<\/strong> maksimalt fladt passb\u00e5nd uden ripple.<\/li>\n<li><strong>Tjebysjov:<\/strong> en skarpere gr\u00e6nsefrekvens, der accepterer ripple i passb\u00e5ndet.<\/li>\n<li><strong>Bessel:<\/strong> line\u00e6r fase, som betyder minimal b\u00f8lgeformdistortion \u2014 det rigtige valg n\u00e5r formen p\u00e5 <a href=\"https:\/\/vibromera.eu\/da\/glossary\/time-waveform\/\">tidsb\u00f8lgeform<\/a> matters.<\/li>\n<li><strong>Elliptisk:<\/strong> den skarpeste mulige overgang, med ripple i b\u00e5de passb\u00e5nd og stopb\u00e5nd.<\/li>\n<\/ul>\n<h2>2. Prim\u00e6re anvendelser<\/h2>\n<h3>Anti-Aliasing (mest kritisk)<\/h3>\n<p>Dette er den funktion, som ingen digitaliserer kan udelade. Uden den foldes frekvenser over Nyquist-gr\u00e6nsen tilbage og optr\u00e6der som falske toppe \u2014 f\u00e6nomenet <a href=\"https:\/\/vibromera.eu\/da\/glossary\/aliasing\/\">aliasing<\/a>.<\/p>\n<ul>\n<li><strong>Form\u00e5l:<\/strong> blokerer frekvenser over Nyquist-frekvensen (halvdelen af sampleraten).<\/li>\n<li><strong>Krav:<\/strong> it must act <em>f\u00f8r<\/em> analog-til-digital konvertering \u2014 software kan ikke fjerne et alias efter faktum.<\/li>\n<li><strong>Typisk gr\u00e6nsefrekvens:<\/strong> 0,4&ndash;0,8 &times; (samplingsrate \/ 2).<\/li>\n<li><strong>Stejlhed:<\/strong> Typisk 8. orden eller h\u00f8jere for god aliasing-afvisning<\/li>\n<li><strong>Konsekvens af fors\u00f8mmelse:<\/strong> utilstr\u00e6kkelig anti-aliasing skaber falske spektral-toppe, som efterligner reelle fejl.<\/li>\n<\/ul>\n<h3>St\u00f8jreduktion<\/h3>\n<ul>\n<li>Fjerner h\u00f8jfrekvent elektrisk st\u00f8j.<\/li>\n<li>Filtrerer st\u00f8j fra sensorkabel.<\/li>\n<li>Udj\u00e6vner data for <a href=\"https:\/\/vibromera.eu\/da\/glossary\/trending\/\">trendanalyse<\/a>.<\/li>\n<li>Forbedrer signal-til-st\u00f8j-forholdet for lavfrekventkomponenterne af interesse.<\/li>\n<\/ul>\n<h3>Begr\u00e6nsning af frekvensinterval<\/h3>\n<ul>\n<li>Fokuserer analysen p\u00e5 det frekvensinterval, der er af interesse.<\/li>\n<li>Eksempel: en 0&ndash;100 Hz-analyse for lavhastighedsmaskiner.<\/li>\n<li>Fjerner irrelevant h\u00f8jfrekvensindhold.<\/li>\n<li>Reducerer datakrav til behandling og lagring.<\/li>\n<\/ul>\n<h3>Forberedelse til integration<\/h3>\n<ul>\n<li>Applied before <a href=\"https:\/\/vibromera.eu\/da\/glossary\/integration\/\">integrating<\/a> <a href=\"https:\/\/vibromera.eu\/da\/glossary\/acceleration\/\">acceleration<\/a> til <a href=\"https:\/\/vibromera.eu\/da\/glossary\/velocity\/\">hastighed<\/a>.<\/li>\n<li>Fjerner meget h\u00f8je frekvenser \u2014 st\u00f8j, som integration ellers ville forst\u00e6rke.<\/li>\n<li>Typisk afsk\u00e6ringsfrekvens: 1000&ndash;5000 Hz afh\u00e6ngigt af anvendelsen.<\/li>\n<li>Forhindrer st\u00f8jforst\u00e6rkning, som plager ukontrolleret integration.<\/li>\n<\/ul>\n<h2>3. Valg af afsk\u00e6ringsfrekvens<\/h2>\n<h3>Anti-aliasing-applikationer<\/h3>\n<ul>\n<li><strong>Regel:<\/strong> f<sub>c<\/sub> = 0,4 &times; samplingsfrekvens (konservativ) til 0,8 &times; samplingsfrekvens (aggressiv).<\/li>\n<li><strong>Eksempel:<\/strong> en 10 kHz samplingsfrekvens giver f<sub>c<\/sub> = 4000 Hz.<\/li>\n<li><strong>Kriterium:<\/strong> stoppeb\u00e5nd d\u00e6mpning st\u00f8rre end 60 dB ved Nyquist-frekvensen.<\/li>\n<\/ul>\n<h3>Analytiske anvendelser<\/h3>\n<ul>\n<li>Set f<sub>c<\/sub> lige over den h\u00f8jeste frekvens af interesse.<\/li>\n<li>For lavfrekvent analyse (0&ndash;200 Hz): f<sub>c<\/sub> = 200&ndash;300 Hz.<\/li>\n<li>For <a href=\"https:\/\/vibromera.eu\/da\/glossary\/unbalance\/\">ubalance<\/a> kun (1&times;-komponenten): f<sub>c<\/sub> = 5&ndash;10&times; <a href=\"https:\/\/vibromera.eu\/da\/glossary\/running-speed\/\">l\u00f8behastighed<\/a>.<\/li>\n<li>Lad altid plads til filtrets overgangsb\u00e5nd.<\/li>\n<\/ul>\n<h3>St\u00f8jreduktion<\/h3>\n<ul>\n<li>Identificer st\u00f8jfrekvensomr\u00e5det fra spektret.<\/li>\n<li>Set f<sub>c<\/sub> for at pass signalfrekvenserne samtidig med at st\u00f8jfrekvenserne forkastes.<\/li>\n<li>Afvej st\u00f8jfjernelse mod signalbevarelse.<\/li>\n<\/ul>\n<h2>4. Effekter p\u00e5 m\u00e5linger<\/h2>\n<h3>Amplitudedom\u00e6ne<\/h3>\n<ul>\n<li><strong>Passb\u00e5nd:<\/strong> minimal amplitude\u00e6ndring, typisk mindre end 0,5 dB.<\/li>\n<li><strong>Stopb\u00e5nd:<\/strong> st\u00e6rk d\u00e6mpning, 40&ndash;80 dB eller mere.<\/li>\n<li><strong>Overall level:<\/strong> filtret reducerer den samlede vibrationsafl\u00e6sning, hvis der var betydeligt h\u00f8jfrekvent indhold.<\/li>\n<\/ul>\n<h3>Tidsdom\u00e6ne<\/h3>\n<ul>\n<li>B\u00f8lgeformen udj\u00e6vnes, n\u00e5r h\u00f8jfrekvente variationer fjernes.<\/li>\n<li>Skarpe kanter og toppunkter afrunder.<\/li>\n<li>Transient respons (filterringning) kan p\u00e5virke b\u00f8lgeformen<\/li>\n<li>Faseforskyldning kan \u00e6ndre, hvordan b\u00f8lgeformen tolkes.<\/li>\n<\/ul>\n<h3>Frekvensdom\u00e6ne<\/h3>\n<ul>\n<li>Spektret viser reducerede amplituder over afsk\u00e6ringsfrekvensen.<\/li>\n<li>H\u00f8jfrekvente toppe mindskes eller elimineres.<\/li>\n<li>St\u00f8jgulvet s\u00e6nkes, hvis st\u00f8jen var h\u00f8jfrekvent.<\/li>\n<\/ul>\n<h2>5. Almindelige problemer og l\u00f8sninger<\/h2>\n<h3>Utilstr\u00e6kkelig anti-aliasing<\/h3>\n<ul>\n<li><strong>Symptom:<\/strong> falske lavfrekventttoppe i spektret.<\/li>\n<li><strong>\u00c5rsag:<\/strong> h\u00f8jfrekvenser, der folder tilbage under Nyquist.<\/li>\n<li><strong>L\u00f8sning:<\/strong> bruge et stejlere filter, \u00f8ge samplingsfrekvensen og bekr\u00e6fte, at filtret rent faktisk virker.<\/li>\n<\/ul>\n<h3>Gr\u00e6nsev\u00e6rdien er for lav<\/h3>\n<ul>\n<li><strong>Symptom:<\/strong> gyldige h\u00f8jfrekvente signaler bliver d\u00e6mpet.<\/li>\n<li><strong>Eksempel:<\/strong> <a href=\"https:\/\/vibromera.eu\/da\/glossary\/bearing-fault-frequencies\/\">lejefejlfrekvenser<\/a> reduceret af et alt for aggressivt lavpasfilter.<\/li>\n<li><strong>L\u00f8sning:<\/strong> \u00f8ge afsk\u00e6ringsfrekvensen eller bruge en bl\u00f8dere filterafgang.<\/li>\n<\/ul>\n<h3>Filterartefakter<\/h3>\n<ul>\n<li><strong>Ringning:<\/strong> oscillationer i tidsdom\u00e6net for\u00e5rsaget af et skarpt filterafsnit.<\/li>\n<li><strong>Faseforvr\u00e6ngning:<\/strong> \u00e6ndringer i b\u00f8lgeformens karakteristika som f\u00f8lge af faseforskydninger.<\/li>\n<li><strong>L\u00f8sning:<\/strong> brug et Bessel-filter til kritiske b\u00f8lgeformapplikationer, hvor fase-linearitet betyder noget.<\/li>\n<\/ul>\n<h2>6. Komplement\u00e6re filtre<\/h2>\n<h3>Lavpas vs. h\u00f8jpas<\/h3>\n<ul>\n<li><strong>Low-pass:<\/strong> lader lave frekvenser passere, blokerer h\u00f8je.<\/li>\n<li><strong>High-pass:<\/strong> lader h\u00f8je frekvenser passere, blokerer lave.<\/li>\n<li><strong>Supplerende:<\/strong> bruges sammen til at danne et b\u00e5nd-pasfilter.<\/li>\n<\/ul>\n<h3>B\u00e5ndpasfilter<\/h3>\n<ul>\n<li>En kombination af h\u00f8jpas- og lavpas-trin.<\/li>\n<li>The resulting <a href=\"https:\/\/vibromera.eu\/da\/glossary\/band-pass-filter\/\">b\u00e5ndpasfilter<\/a> lader kun frekvenser inden for et specificeret b\u00e5nd passere.<\/li>\n<li>Det afviser indhold b\u00e5de under og over det b\u00e5nd.<\/li>\n<li>Dette er frontenden af <a href=\"https:\/\/vibromera.eu\/da\/glossary\/envelope-analysis\/\">envelopeanalyse<\/a>, hvor et b\u00e5nd omkring en lejemuffe&#8217;s strukturelle resonans isoleres f\u00f8r demodulation.<\/li>\n<\/ul>\n<h2>7. Hvor lavpas-filteret passer ind p\u00e5 markedet<\/h2>\n<p>P\u00e5 et digitalt feltinstrument er lavpas-filteret for det meste usynligt \u2014 det udf\u00f8rer sit anti-aliasing-arbejde lydl\u00f8st inde i opsamlingsk\u00e6den \u2014 men det er dog fundamentet for trov\u00e6rdigheden af hver m\u00e5ling. En b\u00e6rbar to-kanals analyser s\u00e5dan som <a href=\"https:\/\/vibromera.eu\/da\/vare-2\/balanset-1\/\">Balanset-1A<\/a> b\u00e5ndgr\u00e6nser hver <a href=\"https:\/\/vibromera.eu\/da\/glossary\/accelerometer\/\">accelerometer<\/a> kanal f\u00f8r sampling, s\u00e5 den <a href=\"https:\/\/vibromera.eu\/da\/glossary\/fft\/\">FFT<\/a> den beregner til balancering og diagnostik er fri for aliaserede toppe p\u00e5 hele dets driftsomr\u00e5de. Med spektret rent, kan analysatoren opl\u00f8se 1&times; <a href=\"https:\/\/vibromera.eu\/da\/glossary\/phase\/\">amplitude og fase<\/a> n\u00f8dvendig for at balancere en rotor og rapportere en sand <a href=\"https:\/\/vibromera.eu\/da\/glossary\/residual-unbalance\/\">resterende ubalance<\/a>, i stedet for at jagtes efter en fantom-frekvens skabt af d\u00e5rlig filtrering.<\/p>\n<p>Lavpas-filtre er fundamentale komponenter af vibrationsm\u00e5lingssystemer, der udf\u00f8rer v\u00e6sentlige funktioner fra anti-aliasing-beskyttelse til st\u00f8jreduktion og frekvensomr\u00e5de-valg. At forst\u00e5 deres funktion, v\u00e6lge afsk\u00e6ringsfrekvensen korrekt og v\u00e6rds\u00e6tte deres virkning p\u00e5 det m\u00e5lte signal er afg\u00f8rende for n\u00f8jagtig analyse og for at undg\u00e5 m\u00e5lningsartefakter i digital dataopsamling.<\/p>\n<hr>\n<p><a href=\"https:\/\/vibromera.eu\/da\/glossary\/\">\u2190 Tilbage til hovedindekset<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>L\u00e6r om lavpasfiltre i vibrationsanalyse, signalbehandlingsv\u00e6rkt\u00f8jer, der lader lave frekvenser passere, mens de blokerer h\u00f8je frekvenser, hvilket er afg\u00f8rende for anti-aliasing og st\u00f8jreduktion.<\/p>","protected":false},"featured_media":0,"template":"","meta":{"ai_generated_summary":"","footnotes":""},"categories":[109,110],"tags":[],"class_list":["post-158","glossary","type-glossary","status-publish","hentry","category-glossary","category-vibration-diagnostics"],"_links":{"self":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/158","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary"}],"about":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/types\/glossary"}],"version-history":[{"count":1,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/158\/revisions"}],"predecessor-version":[{"id":101341,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/glossary\/158\/revisions\/101341"}],"wp:attachment":[{"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/media?parent=158"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/categories?post=158"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vibromera.eu\/da\/wp-json\/wp\/v2\/tags?post=158"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}