A Reusable AI-Enabled Defect Detection System for Railway Using Ensembled CNN
This work addresses defect detection for railway maintenance, offering a reusable AI solution, though it is incremental as it builds on existing ensemble and transfer learning methods.
The paper tackled the problem of defect detection in railway systems by proposing an ensemble of transfer learning models (VGG-19, MobileNetV3, ResNet-50), which improved classification accuracy and achieved consistent performance compared to state-of-the-art approaches.
Accurate Defect detection is crucial for ensuring the trustworthiness of intelligent railway systems. Current approaches rely on single deep-learning models, like CNNs, which employ a large amount of data to capture underlying patterns. Training a new defect classifier with limited samples often leads to overfitting and poor performance on unseen images. To address this, researchers have advocated transfer learning and fine-tuning the pre-trained models. However, using a single backbone network in transfer learning still may cause bottleneck issues and inconsistent performance if it is not suitable for a specific problem domain. To overcome these challenges, we propose a reusable AI-enabled defect detection approach. By combining ensemble learning with transfer learning models (VGG-19, MobileNetV3, and ResNet-50), we improved the classification accuracy and achieved consistent performance at a certain phase of training. Our empirical analysis demonstrates better and more consistent performance compared to other state-of-the-art approaches. The consistency substantiates the reusability of the defect detection system for newly evolved defected rail parts. Therefore we anticipate these findings to benefit further research and development of reusable AI-enabled solutions for railway systems.