谱熵分析方法在漏磁信号特征提取中的应用

为了研究谱熵分析方法在漏磁无损检测中的应用，将信息熵理论引入缺陷漏磁信号的特征提取工作中．通过试验分析证明一维谱熵、二维谱熵在缺陷类别辨识中的可行性，并指出其存在的局限性．提出了集能量集中程度、谱线的重心位置和能量大小3种指标于一身的适于缺陷定量分析、识别的谱熵三维向量的概念，并在室内实验台架上实际测得的不同尺寸矩形槽类内、外缺陷信号分析中进行了应用．实验结果表明，对于矩形槽外缺陷而言．谱熵三维向量中的三维向量指标与二维谱熵和一维谱熵相比，在漏磁检测缺陷定量化方面具有很大的优越性。为缺陷识别定量化提供了一条途径．

Spectrum Entropy and Its Application in Characteristics Abstraction of Magnetic Flux Leakage Signals

ion. Experiments have proved that 1-dimensional and 2-dimensional spectrum entropy indexes are practical in characteristics abstraction of defect, and at the same time, their limitations are pointed out. The concept of 3-dimensional spectrum entropy is put forward and developed into a 3-dimensional index. All of them have been used to analyze and recognize the defect quantitatively in the testing. The results indicate that the 3-dimensional spectrum entropy index has its own advantages.