Academic Journal
CALIBRATION AND VALIDATION OF A STEREO CAMERA SYSTEM AUGMENTED WITH A LONG-WAVE INFRARED MODULE TO MONITOR ULTRASONIC WELDING OF THERMOPLASTICS
| العنوان: | CALIBRATION AND VALIDATION OF A STEREO CAMERA SYSTEM AUGMENTED WITH A LONG-WAVE INFRARED MODULE TO MONITOR ULTRASONIC WELDING OF THERMOPLASTICS |
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| المؤلفون: | Wischow, M., Dahlke, D., Meißner, H., Ernst, I., Jarka, S., Glück, R. |
| المصدر: | eISSN: 2194-9050 |
| سنة النشر: | 2022 |
| المجموعة: | Copernicus Publications: E-Journals |
| الوصف: | Ultrasonic welding of thermoplastics has become an important industrial manufacturing process in the fields of aerospace and transportation. High quality standards are demanded and a reliable quality assessment routine is fundamental. Most on-site and off-site approaches are time consuming or require additional active illumination. Especially temperature models have proven to be good indicators for welding quality. We present a methodology to measure the surface temperature in real-time and visualize it simultaneously as a 3D model. Through augmenting a stereo camera system with an additional passive thermal infrared camera, we are able to map the heat data of multiple successive welds of large, free-form structures into a common 3D data representation. A challenging calibration approach is used to derive the inner and exterior orientation for the trifocal camera system. Geometric and radiometric improvements for an aluminium chessboard allow the usage of wide-angle optics for the thermal infrared camera. Consequently, we verify the quality of each camera by means of their resolving power. Therefore, a Siemens star test pattern is used for the thermal camera as well. We demonstrate the effectiveness of our methodology on a robot-guided ultrasonic welding tool. |
| نوع الوثيقة: | text |
| وصف الملف: | application/pdf |
| اللغة: | English |
| Relation: | https://isprs-annals.copernicus.org/articles/V-1-2022/179/2022/ |
| DOI: | 10.5194/isprs-annals-V-1-2022-179-2022 |
| الاتاحة: | https://doi.org/10.5194/isprs-annals-V-1-2022-179-2022 https://isprs-annals.copernicus.org/articles/V-1-2022/179/2022/ |
| رقم الانضمام: | edsbas.8BD06740 |
| قاعدة البيانات: | BASE |
| DOI: | 10.5194/isprs-annals-V-1-2022-179-2022 |
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