摘要
管道的泄漏检测对于物料长距离运输的安全至关重要。利用加权排列熵方法分析管道的压力时间序列,可提取压力时间序列的特征,通过判定所提取特征的变化,实现管道的泄漏检测。考虑到单尺度加权排列熵在反映压力信号复杂度方面的不足,提出了基于多尺度加权排列熵的管道泄漏检测方法。该方法采取移动窗口法,选取固定长度的压力序列作为子序列。计算该子序列的多尺度加权排列熵,从而判定管道的泄漏。最后,通过对管道泄漏实验装置的仿真试验,验证了所提算法的有效性。
Pipeline leak detection technique plays an important role in the safety of long-distance material transportation. The characteristics of the pressure time series can be extracted by using the weighted permutation entropy method. Therefore, the pipeline leak can be detected by observing the abrupt change of these characteristics. A novel pipeline leak detection method based on multi-scale weighted permutation entropy was proposed to deal with the complexity of the pressure time series. The maximum overlapping moving window method was adopted to select a fixed pressure sequence as the subsequence. Then, the multi-scale weighted permutation entropy of the chosen subsequence was calculated to determine the leakage. The experimental results demonstrate the capability and efficiency of the proposed method.
引文
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