The invention discloses a steel rail fracture monitoring method based on a multivariate coding ultrasonic guided wave technology, which comprises the following steps of: firstly, forming a novel multivariate excitation coding sequence based on a traditional binary coding Barker code and a binary orthogonal complementary Golay code through a series of mathematical operations; and modulating an ultrasonic guided wave monopulse excitation signal through the multi-element coding sequence to form a new coding excitation waveform, and monitoring the fracture damage of the steel rail through the new coding excitation waveform. The multivariate coding in the multivariate coding excitation ultrasonic guided wave signal provided by the invention integrates the advantages of two basic coding methods, the flexibility of coding length is increased, the signal-to-noise ratio gain and peak side lobe level of the multivariate coding excitation ultrasonic guided wave signal are improved, and the working efficiency of steel rail fracture monitoring is improved.
本发明公开了一种基于多元编码超声导波技术的钢轨断裂监测方法,首先多元编码序列是基于传统二元编码Barker码和二元正交互补Golay码,之后通过系列数学运算,形成一种新的多元激励编码序列,通过该多元编码序列调制超声导波单脉冲激励信号,形成新的编码激励波形,通过新的编码激励波形来监测钢轨断裂损伤。本发明提出的多元编码激励超声导波信号中的多元编码综合了两种基础编码方法的优点,增加了编码长度的灵活性,提高了多元编码激励超声导波信号的信噪比增益和峰值旁瓣水平,提高了钢轨断裂监测的工作效率。
Steel rail fracture monitoring method based on multi-element coding ultrasonic guided wave technology
一种基于多元编码超声导波技术的钢轨断裂监测方法
2023-04-25
Patent
Electronic Resource
Chinese
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