{"id":17186,"date":"2022-05-02T15:13:56","date_gmt":"2022-05-02T13:13:56","guid":{"rendered":"https:\/\/www.handsonmetrology.com\/blog\/automatisierte-pruefung-von-schweissnaehten\/"},"modified":"2026-02-26T12:37:17","modified_gmt":"2026-02-26T11:37:17","slug":"automatisierte-pruefung-von-schweissnaehten","status":"publish","type":"post","link":"https:\/\/www.handsonmetrology.com\/de\/blog\/automatisierte-pruefung-von-schweissnaehten\/","title":{"rendered":"Automatisierte Schwei\u00dfnahtpr\u00fcfung zur Qualit\u00e4tssicherung"},"content":{"rendered":"\t\t
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Weld inspection<\/strong>: <\/strong>testing methods<\/strong> and automation<\/strong><\/h2>\n

A weld inspection is a key element of quality assurance in welding technology. Various test methods can be used to identify weld defects such as cracks or lack of fusion in welded joints. The new weld check package in the ZEISS INSPECT software allows for automated and standardized non-destructive testing of welds. Together with the hand-held ZEISS T-SCAN hawk 2, selected scan data can be evaluated with maximum convenience.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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What is a weld inspection?<\/strong><\/h2>\n

A weld inspection is used to check the quality of a component\u2019s welds. This quality control is particularly important to ensure that the welds are strong and can withstand the stresses of everyday use. A weld inspection can directly identify and evaluate defects or discontinuities in the welded joints, such as cracks, porosity, blowholes, foreign inclusions, incomplete penetration or deviations in shape and dimensions.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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How do you test welds?<\/strong><\/h2>\n

There are various weld inspection methods which can be roughly divided into non-destructive and destructive tests. To perform a non-destructive test (NDT) on the surface of a weld, the following methods are used: visual inspection, dye penetrant testing, eddy current testing or magnetic particle testing. Defects inside a welded joint can be identified non-destructively by way of X-ray or ultrasonic testing.<\/p>\n

When destructive testing methods are used for welds, the part is damaged, or even destroyed, to assess weld quality and detect weld defects. The welded joints are subjected to various tests, for example the tensile test, hardness test, bend test or corrosion test. This makes it possible to determine properties such as hardness, durability, or tensile strength. Destructive testing methods are often used for test objects and initial samples, while non-destructive testing of welds is used in serial production.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"weld-check\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Non-destructive testing methods for welding<\/strong><\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Visual inspection<\/strong><\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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When visually inspecting welds, the weld is checked for any flaws that are visible to the naked eye using a few aids such as a magnifying glass, an endoscope, or a camera. This makes it possible to directly detect any obvious defects or deviations in shape and size.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Laser triangulation<\/strong><\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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With this method, laser points or beams and cameras with sensors are used to record the surface geometry of the weld. By evaluating the reflected light and the angle it hits the sensors, geometric defects such as warping or distortions in the weld can be identified. This technology makes it possible to assess the weld quality quickly and precisely.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Interferometry<\/strong><\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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This high-precision method uses light wave interference to detect the slightest irregularities and changes in the surface topography of the weld. By superimposing split and recombined light waves, an interference pattern is created that provides precise information about any surface defects. This technology is particularly suitable for safety-critical applications that require the highest quality standards.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Digital image processing<\/strong><\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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High-resolution cameras and the corresponding software can be used to develop automated testing procedures for quality control and evaluation of welds.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Magnetic particle inspection<\/strong><\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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Surface cracks can be detected by magnetizing the part and applying magnetic powder to the weld. Flaws such as lack of fusion generate small leakage fields on the surface which attract the magnetic powder.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Dye penetrant inspection<\/strong><\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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During this weld inspection, a colored test agent is applied to the weld, which settles in cracks and makes them visible.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Eddy-current testing<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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This weld inspection can be used to detect both surface and subsurface defects. Defects in the weld change the flow of magnetic currents, which is detected and interpreted by special testing devices.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Ultrasonic testing<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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Ultrasonic examinations can be used to detect discontinuities and flaws in the material. During ultrasonic testing, an ultrasonic transducer sends sound waves through the material, which are reflected at defective areas. The returning waves can be analyzed to precisely detect both surface and internal discontinuities.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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X-ray testing<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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This method uses X-rays to illuminate the internal structure of the weld. Deviations in the material, such as pores or inclusions, absorb the X-rays differently and therefore appear as contrasts on the X-ray image.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Destructive test methods <\/strong>for <\/strong>welding<\/strong><\/h2>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Hardness test<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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This weld inspection measures the resistance of the material to penetration by a solid object to evaluate the mechanical properties of the weld.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Tensile testing<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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This technique involves stretching the part until it breaks apart at the weld. This makes it possible to determine the load capacity and strength of the weld.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Bend test<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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In a bend test, the part is bent progressively until it breaks at the welded joint. This makes it possible to determine the quality and properties of the ductile deformation.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Corrosion testing<\/h3>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t
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This weld inspection tests the resistance of welded joints in corrosive environments. The part can be subjected to a salt spray test, an immersion test, condensation, electrochemistry, high temperatures and pressure or similar.<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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Automated vs manual <\/strong>visual inspection <\/strong>of <\/strong>welds<\/strong><\/h2>\n

Inspecting welds for defects is extremely important, as defective welds result in damaged parts or, in the worst case, the failure of entire welded structures. This can pose a high safety risk for both people and the environment. This is why many industries are obliged to carry out weld inspections. Depending on the test method and welding design, different standards apply to ensure the quality of welded joints and welding process tests.<\/p>\n

One of the most important and usually also the first weld inspection, the visual inspection, is carried out in accordance with DIN EN ISO 13018. As the name suggests, the surface of the weld is closely examined by trained specialists. This way, any obvious deviations in the shape, dimensions and surface structure can be detected straight away. However, there are a few challenges to overcome when visually inspecting welds. According to the ISO standard, the welded joint should be sufficiently illuminated to at least 500 lux. However, the rooms in which testing takes place are not always brightly lit and welds are often located in hard-to-reach areas of the part. This means that flashlights are often used. A range of manual measuring devices are also used, such as callipers, three-scale gauges, and seam gauges. The inspector uses these tools to take numerous measurements and then compares them with the permissibility criteria of the stipulated standard for the welding process test. Many manual steps mean a high potential for error. Visual testing takes a great deal of time, especially for poorly accessible welds, and the lack of a digital test report for the visual weld inspection also makes it difficult to trace and check for defects occurring later. Automated weld inspection could be the ideal solution to this problem. But is it even possible to automate and standardize these weld inspection procedures?<\/p>\n\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t

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\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\"t-scan_zeiss_3d-scanning\"\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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Visuelle Pr\u00fcfung eines Motorradrahmens: die Software im Detail<\/h3>
Mit der Kombination aus dem 3D-Scansystem und der Schwei\u00dfnahtpr\u00fcfungsfunktion in GOM Inspect Pro ist eine automatisierte Sichtpr\u00fcfung an jedem beliebigen Teil m\u00f6glich, unabh\u00e4ngig von Gr\u00f6\u00dfe und Form. In diesem Beispiel dient ein Motorradrahmen zur Veranschaulichung. Nachdem dieser mit dem handgef\u00fchrten T-SCAN Hawk vermessen wurde, werden die Scandaten in die GOM Inspect Pro Software geladen. Danach folgt die eigentliche Pr\u00fcfung der Schwei\u00dfn\u00e4hte. In der Software wird eine einfache Kurve verwendet, um die zu pr\u00fcfende Schwei\u00dfnaht auszuw\u00e4hlen. Anschlie\u00dfend kann eine beliebige Anzahl von Abschnitten definiert werden, z. B. alle in einem Abstand von 10 mm. Diese Abschnitte des Motorradrahmens k\u00f6nnen nun mit der neuen Zusatzfunktion „Weld Check“ (Schwei\u00dfnahtpr\u00fcfung) ausgewertet werden. Alle Merkmale der DIN-Norm 5817 sind dort automatisch hinterlegt und werden nicht nur per Mausklick gepr\u00fcft, sondern auch direkt in die entsprechenden Bewertungskategorien B, C oder D eingeordnet. Gr\u00fcn bedeutet erf\u00fcllt, orange zeigt an, dass sie gerade noch innerhalb der Toleranz liegt und rot bedeutet, dass sie die Kriterien nicht erf\u00fcllt.
In unserem Beispiel entspricht die ausgew\u00e4hlte Schwei\u00dfnaht nur in einem Abschnitt nicht den Vorgaben f\u00fcr die Schwei\u00dfnahtverst\u00e4rkung. Bereits bei der Pr\u00fcfung der einzelnen Merkmale k\u00f6nnen separate Berichte erstellt werden. Selbstverst\u00e4ndlich ist auch eine Gesamtprotokollierung aller Merkmale des VTs m\u00f6glich. Dies erm\u00f6glicht eine digitale Dokumentation aller durchgef\u00fchrten Sichtpr\u00fcfungen. Ist eine Referenz in der Software hinterlegt, kann auch die Lage und Vollst\u00e4ndigkeit der Schwei\u00dfn\u00e4hte \u00fcberpr\u00fcft werden. Diese Referenz kann ein CAD-Modell oder ein 3D-Scan sein. So kann bei einer Kleinserie von Motorradrahmen der Musterscan als Vorlage gespeichert werden und als Ma\u00dfstab f\u00fcr die Serienpr\u00fcfung dienen.\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t
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\n\t\t\t\t\t\tBeginnen Sie jetzt mit der automatischen Pr\u00fcfung von Schwei\u00dfn\u00e4hten\t\t\t\t\t<\/h2>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t
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Wenn Sie daran interessiert sind, jetzt mit der automatischen Schwei\u00dfnahtpr\u00fcfung zu beginnen oder mehr \u00fcber 3D Scansysteme erfahren m\u00f6chten, wenden Sie sich einfach an support@handsonmetrology.com. Sie k\u00f6nnen hier auch eine Demo f\u00fcr das Weld Check Package anfordern, das in der GOM Inspect Pro Version verf\u00fcgbar ist.<\/p>\n\t\t\t\t\t<\/div>\n\t\t\t\t\n\t\t\t\t\t\t\t\t\t

\n\t\t\t\t\t\n\t\t\t\t\t\tDemo anfordern\t\t\t\t\t<\/a>\n\t\t\t\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"

Das neue Schwei\u00dfnahtpr\u00fcfpaket in ZEISS INSPECT sorgt f\u00fcr eine automatisierte und standardisierte Pr\u00fcfung von Schwei\u00dfn\u00e4hten. Zusammen mit dem T-SCAN k\u00f6nnen ausgew\u00e4hlte Scandaten mit maximalem Komfort ausgewertet werden.<\/p>\n","protected":false},"author":9,"featured_media":11748,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[415,1465,1475],"tags":[1471],"resource_application":[1375,1383,1387],"resource_industry":[1393,1401,1403,1407,1409,1411,1413,1415,1417],"resource_products":[1419,1425],"resource_formats":[1437,1451],"industry":[767],"use-case":[823],"topic":[781,785,787],"class_list":["post-17186","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-unkategorisiert","category-gom-inspect","category-3d-inspektion","tag-hero","resource_application-prototyping","resource_application-mro-maintenance-repair-and-overhaul","resource_application-reverse-engineering","resource_industry-transportation","resource_industry-consumer-goods","resource_industry-electronics","resource_industry-aerospace","resource_industry-metal-products","resource_industry-machinery","resource_industry-power-energy","resource_industry-medical","resource_industry-automotive-nev","resource_products-software","resource_products-zeiss-inspect","resource_formats-blog-article","resource_formats-learn","industry-welding-industry","use-case-3d-inspection","topic-general-interest","topic-automation","topic-software"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/posts\/17186","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/comments?post=17186"}],"version-history":[{"count":16,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/posts\/17186\/revisions"}],"predecessor-version":[{"id":67717,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/posts\/17186\/revisions\/67717"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/media\/11748"}],"wp:attachment":[{"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/media?parent=17186"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/categories?post=17186"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/tags?post=17186"},{"taxonomy":"resource_application","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/resource_application?post=17186"},{"taxonomy":"resource_industry","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/resource_industry?post=17186"},{"taxonomy":"resource_products","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/resource_products?post=17186"},{"taxonomy":"resource_formats","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/resource_formats?post=17186"},{"taxonomy":"industry","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/industry?post=17186"},{"taxonomy":"use-case","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/use-case?post=17186"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.handsonmetrology.com\/de\/wp-json\/wp\/v2\/topic?post=17186"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}