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Design and Construction of an LED-Based Excitation Source for Lock-In Thermography

التفاصيل البيبلوغرافية
العنوان: Design and Construction of an LED-Based Excitation Source for Lock-In Thermography
المؤلفون: Patrick Dahlberg, Nils J. Ziegeler, Peter W. Nolte, Stefan Schweizer
المصدر: Applied Sciences, Vol 12, Iss 6, p 2940 (2022)
بيانات النشر: MDPI AG, 2022.
سنة النشر: 2022
المجموعة: LCC:Technology
LCC:Engineering (General). Civil engineering (General)
LCC:Biology (General)
LCC:Physics
LCC:Chemistry
مصطلحات موضوعية: lock-in thermography, excitation source, halogen lamp, infrared LED, Technology, Engineering (General). Civil engineering (General), TA1-2040, Biology (General), QH301-705.5, Physics, QC1-999, Chemistry, QD1-999
الوصف: Active thermography is an established technique for non-destructive testing and defect localisation. For external excitation, powerful light sources are commonly used. In addition to a high optical output, a good signal shape and response characteristic as well as control ports, which allow for multiple operation modes, are important for active thermography applications. In this work, the schematics for an excitation source based on infrared LEDs is presented. It features multiple control modes for easy integration into existing measurement setups as well as sophisticated control electronics to realize a wide range of excitation patterns. The phase and amplitude stability of this prototype is investigated and compared to the performance of a modulated halogen lamp as well as a halogen lamp and mechanical chopper combination.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 2076-3417
Relation: https://www.mdpi.com/2076-3417/12/6/2940; https://doaj.org/toc/2076-3417
DOI: 10.3390/app12062940
URL الوصول: https://doaj.org/article/530dc5b95b434a3585c884f1cc7d82d9
رقم الأكسشن: edsdoj.530dc5b95b434a3585c884f1cc7d82d9
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:20763417
DOI:10.3390/app12062940