{"id":159033,"date":"2021-07-21T09:15:23","date_gmt":"2021-07-21T07:15:23","guid":{"rendered":"https:\/\/bandelin.com\/?post_type=docs&#038;p=159033"},"modified":"2021-07-21T09:15:25","modified_gmt":"2021-07-21T07:15:25","password":"","slug":"genereren-van-ultrageluid","status":"publish","type":"docs","link":"https:\/\/bandelin.com\/nl\/docs\/wissen\/erzeugung-von-ultraschall\/","title":{"rendered":"Opwekken van ultrageluid"},"content":{"rendered":"<div class=\"product\"><div class=\"product\">\n<p>Voor het opwekken van ultrageluid is een hoogfrequente generator nodig, die de normale netfrequentie van 50-60 Hz omzet in hoogfrequente trillingen tussen 20 en 40 kHz. Zogenaamde transducers of omvormers, die bijvoorbeeld onder het reinigingsbad kunnen worden ge\u00efnstalleerd, zetten deze elektromagnetische trillingen vervolgens om in mechanische trillingen met dezelfde frequentie. Eenvoudig gezegd is de transducer niets meer dan een resonantiesysteem dat door een geschikte toevoer van energie wordt gestimuleerd om te trillen. Bekende elektro-akoestische transducers zoals telefoons of luidsprekers, die werken in het hoorbare frequentiebereik, falen om verschillende redenen in het ultrasone bereik. Daarom wordt hier het indirecte pi\u00ebzo-elektrische effect gebruikt. Als er een elektrische spanning op een pi\u00ebzo-elektrisch materiaal wordt gezet, reageert het materiaal met een toename in de lengterichting en met een verkorting als de polariteit van de spanning wordt omgekeerd. Hierdoor kan een elektrische oscillatie, waarbij de polariteit van de spanning voortdurend wordt omgekeerd, worden omgezet in een wisselende mechanische beweging.\u00a0<br>Gesinterde keramiek van loodzirkonaattitanaat (PZT) wordt gebruikt voor de productie van hoogwaardige ultrasone apparaten met een effici\u00ebntie van meer dan 90 procent.\u00a0<br>Bij lage ultrasone werkfrequenties in het bereik van 25 kHz is het reinigingseffect door cavitatie zeer effici\u00ebnt. De cavitatiebellen kunnen groot worden (spannings- en compressiefasen duren langer) en daardoor veel energie bevatten of afgeven wanneer ze imploderen. In het relatief hogere frequentiebereik van 40 kHz wordt een veld van kleinere maar talrijke cavitatiebellen verkregen en worden bijzonder zachte onderdelen gereinigd.<br>Afhankelijk van het toepassingsgebied worden tegenwoordig frequenties van 25 kHz (grove reiniging in de machinebouw) en 40 kHz (gevoelige onderdelen, bijv. uit de medische, optische en elektronicasector) gebruikt.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/bandelin.com\/wp-content\/uploads\/2021\/07\/Ultraschall_Schwinger-scaled.jpg\"><img decoding=\"async\" src=\"https:\/\/bandelin.com\/wp-content\/uploads\/2021\/07\/Ultraschall_Schwinger-893x1024.jpg\" alt=\"\" class=\"wp-image-159034\"\/><\/a><\/figure>\n\n\n\n<p>Meer informatie over het genereren van ultrageluid met behulp van sonotroden <strong>Ultrasone homogenisatoren, bijvoorbeeld voor celdisruptie.<\/strong><\/p>\n<\/div><\/div>","protected":false},"excerpt":{"rendered":"<p>Zur Erzeugung von Ultraschall ben\u00f6tigt man einen Hochfrequenz-Generator, der die normale\u00a0Netzfrequenz von 50 &#8211; 60 Hz in hochfrequente Schwingungen zwischen 20 und 40 kHz\u00a0umwandelt. Sogenannte Schallwandler oder Schwinger, die z. B. unter dem Reinigungsbad angebracht\u00a0sein k\u00f6nnen, setzen dann diese elektromagnetischen Schwingungen in mechanische\u00a0Vibrationen gleicher Frequenz um. Einfach ausgedr\u00fcckt ist der Schallwandler nichts weiter als ein\u00a0Resonanzsystem, [&hellip;]<\/p>\n","protected":false},"author":3,"featured_media":0,"template":"","meta":{"_acf_changed":false,"footnotes":""},"doc_category":[1926],"doc_tag":[],"class_list":["post-159033","docs","type-docs","status-publish","hentry","doc_category-wissen"],"acf":[],"year_month":"2026-11","word_count":265,"total_views":"142","reactions":{"happy":"0","normal":"0","sad":"0"},"author_info":{"name":"J Bandelin","author_nicename":"jobandelin","author_url":"https:\/\/bandelin.com\/nl\/author\/jobandelin\/"},"doc_category_info":[{"term_name":"Grundlagenwissen Kavitation","term_url":"https:\/\/bandelin.com\/nl\/docs-category\/wissen\/"}],"doc_tag_info":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.7 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Erzeugung von Ultraschall | BANDELIN electronic GmbH &amp; Co. 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