Rolling stock maintenance plays a major role in ensuring safety, on-schedule services, environmental harmony, and vehicle life in railway operation. Accordingly, maintenance work on rolling stock in train sheds or railway factories often requires many inspectors and considerable time. Improvements in the maintenance workshop environment and in work efficiency are therefore necessary. To meet these needs, we have developed various rolling stock maintenance systems applying advanced sensor technology and image processing technology. These systems can acquire inspection data on rolling stock in motion using sensors or cameras installed on the ground, and perform quality judgments of the measurement results. Furthermore, they can also estimate replacement times for worn parts. These systems therefore bring about significant improvements in inspection work.
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