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Optical inspection and measurement of solar modules

08 February 2011 – The German automation specialist and systems integrator KUKA Systems GmbH developed an optical inspection and measurement system for photovoltaic modules. The KUKA String Test is particularly recommended for automated production, where it can enhance the quality and output of the modules produced. A camera system is used to measure the strings, check the position of the bus bars and give the cells a final inspection. This ensures that the robot positions the string optimally and that faulty parts are segregated for manual reworking.

An optional EL (electroluminescence) test reveals cracks (known as micro cracks) and functionally inefficient areas of the solar cells. The procedure takes between 8 and 20 seconds, depending on the scope of the test and the string size, at the end of which a clear quality analysis is available. In cell strings that have passed the test, the connecting strands are cut to size for the relevant deposition position in readiness for the subsequent process step, cross-soldering.

www.kuka-systems.com/en


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