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Anomaly Detection Using Puzzle-Based Data Augmentation to Overcome Data Imbalances and Deficiencies
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Machine tools are used in a wide range of applications, and they can manufacture workpieces flexibly. Furthermore, they require maintenance; the overall costs include maintenance costs, which constitute a significant portion, and the costs involved in ensuring product quality. Therefore, anomaly detection in tool conditions is required, because these tools are essential industrial elements. However, the data related to tool conditions present some challenges: data imbalances and deficiencies. Data imbalances and deficiencies can affect the performance of anomaly detection models. A model trained using data with imbalances and deficiencies may miscalculate that abnormal data are normal data, leasing to errors. To overcome these problems, the proposed method has been designed using the wavelet transform, color space conversion, color extraction, puzzle-based data augmentation, and double transfer learning. The proposed method generated image data from time-series data, effectively extracted features, and generated new image data using puzzle-based data augmentation. The color information was processed to highlight features, and the proposed puzzle-based data augmentation was applied during processing to increase the amount of data to improve the performance of the anomaly detection model. The experimental results showed that the proposed method can classify normal and abnormal data with greater accuracy. In particular, the accuracy of abnormal data classification increased from 25.00% to 91.67%. This demonstrates that the proposed method is effective and can overcome data imbalances and deficiencies.
Title: Anomaly Detection Using Puzzle-Based Data Augmentation to Overcome Data Imbalances and Deficiencies
Description:
Machine tools are used in a wide range of applications, and they can manufacture workpieces flexibly.
Furthermore, they require maintenance; the overall costs include maintenance costs, which constitute a significant portion, and the costs involved in ensuring product quality.
Therefore, anomaly detection in tool conditions is required, because these tools are essential industrial elements.
However, the data related to tool conditions present some challenges: data imbalances and deficiencies.
Data imbalances and deficiencies can affect the performance of anomaly detection models.
A model trained using data with imbalances and deficiencies may miscalculate that abnormal data are normal data, leasing to errors.
To overcome these problems, the proposed method has been designed using the wavelet transform, color space conversion, color extraction, puzzle-based data augmentation, and double transfer learning.
The proposed method generated image data from time-series data, effectively extracted features, and generated new image data using puzzle-based data augmentation.
The color information was processed to highlight features, and the proposed puzzle-based data augmentation was applied during processing to increase the amount of data to improve the performance of the anomaly detection model.
The experimental results showed that the proposed method can classify normal and abnormal data with greater accuracy.
In particular, the accuracy of abnormal data classification increased from 25.
00% to 91.
67%.
This demonstrates that the proposed method is effective and can overcome data imbalances and deficiencies.
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