Modern rail vehicles like multiple-unit, high-speed trains require regular and dependable maintenance to ensure the longest possible service life and minimize wear on the trains. Traditionally, qualified technicians who undergo special visual training performed these tasks, but this is a time-intensive process. To perform inspections, technicians climb up onto a train roof after the train and overhead line are grounded for safety precautions. This process is laborious, and the inspection engineers must cover a distance of 200 m.
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