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Smart Structures and Systems
  Volume 6, Number 4, May 2010, pages 405-421

Early warning of hazard for pipelines by acoustic recognition using principal component analysis and one-class support vector machines
Chunfeng Wan and Akira Mita

    This paper proposes a method for early warning of hazard for pipelines. Many pipelines transport dangerous contents so that any damage incurred might lead to catastrophic consequences. However, most of these damages are usually a result of surrounding third-party activities, mainly the constructions. In order to prevent accidents and disasters, detection of potential hazards from third-party activities is indispensable. This paper focuses on recognizing the running of construction machines because they indicate the activity of the constructions. Acoustic information is applied for the recognition and a novel pipeline monitoring approach is proposed. Principal Component Analysis (PCA) is applied. The obtained Eigenvalues are regarded as the special signature and thus used for building feature vectors. One-class Support Vector Machine (SVM) is used for the classifier. The denoising ability of PCA can make it robust to noise interference, while the powerful classifying ability of SVM can provide good recognition results. Some related issues such as standardization are also studied and discussed. On-site experiments are conducted and results prove the effectiveness of the proposed early warning method. Thus the possible hazards can be prevented and the integrity of pipelines can be ensured.
Key Words
    pipeline; possible hazard; principal component analysis; one-class support vector machines; standardization.
Chunfeng Wan: International Institute for Urban Systems Engineering, School of Civil Engineering, Southeast University, Nanjing 210096, China
Akira Mita: System Design Department, Keio University, Hiyoshi, Yokohama 223-8522, Japan

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