arXiv:2507.17071cs.LGcs.SY2025-07

用知识蒸馏解决电子鼻传感器漂移问题,提升气体识别准确率。

Sensor Drift Compensation in Electronic-Nose-Based Gas Recognition Using Knowledge Distillation

  • 提出知识蒸馏方法,通过迁移历史数据知识补偿传感器漂移。
  • 在UCI数据集上实现最高18%的准确率提升和15%的F1-score提升。
  • 首次将知识蒸馏用于电子鼻漂移补偿,适合工业部署场景。

由于环境变化和传感器老化,电子鼻系统在真实部署中的气体分类性能受传感器漂移影响。以往基于UCI气体传感器阵列漂移数据集的研究虽取得良好漂移补偿效果,但缺乏稳健的统计实验验证,可能过度补偿漂移并丢失类别相关方差。为解决此问题并提升补偿的统计严谨性,我们基于同一数据集设计了两个领域自适应任务:使用首批数据预测后续批次(模拟受控实验室场景);使用所有前期批次预测下一批次(模拟在线持续训练)。我们系统测试了三种方法:提出的新型知识蒸馏(KD)方法、基准方法域正则化成分分析(DRCA)以及混合方法KD-DRCA,共在UCI数据集上30组随机测试划分中进行评估。结果表明,KD始终优于DRCA与KD-DRCA,准确率最高提升18%,F1-score最高提升15%,证明其在漂移补偿上的优越性。这是知识蒸馏首次应用于电子鼻漂移缓解,显著超越此前最先进方法DRCA,增强了真实环境中传感器漂移补偿的可靠性。

原文摘要 · Abstract (English)

Due to environmental changes and sensor aging, sensor drift challenges the performance of electronic nose systems in gas classification during real-world deployment. Previous studies using the UCI Gas Sensor Array Drift Dataset reported promising drift compensation results but lacked robust statistical experimental validation and may overcompensate for sensor drift, losing class-related variance.To address these limitations and improve sensor drift compensation with statistical rigor, we first designed two domain adaptation tasks based on the same electronic nose dataset: using the first batch to predict the remaining batches, simulating a controlled laboratory setting; and predicting the next batch using all prior batches, simulating continuous training data updates for online training. We then systematically tested three methods: our proposed novel Knowledge Distillation (KD) method, the benchmark method Domain Regularized Component Analysis (DRCA), and a hybrid method KD-DRCA, across 30 random test set partitions on the UCI dataset. We showed that KD consistently outperformed both DRCA and KD-DRCA, achieving up to an 18% improvement in accuracy and 15% in F1-score, demonstrating KD's superior effectiveness in drift compensation. This is the first application of KD for electronic nose drift mitigation, significantly outperforming the previous state-of-the-art DRCA method and enhancing the reliability of sensor drift compensation in real-world environments.

电子鼻传感器漂移知识蒸馏气体识别

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