用于超声波测试的巴克和相互直角的戈莱补充代码的卷积
Chengxiang Peng1, Paul Annus2, Marek Rist2
1Department of Civil Engineering and Architecture, Tallinn University of Technology, 19086 Tallinn, Estonia.
超声波测试 (UT) 面临信号减弱的挑战. 一个新的Barker-convolved相互直角的Golay补充代码 (BMOGCC) 在非破坏性测试 (NDT) 中提高了信号能量和效率.
科学领域:
- 材料科学
- 听力学
- 非破坏性测试
背景情况:
- 超声波测试对于材料完整性评估至关重要,但在某些材料中存在信号衰减问题.
- 由于衰减,UT中的常规激发信号通常具有较低的能量和较差的解释性.
- 现有的编码激发方法,如巴克代码和补充戈莱代码 (CGC),在序列长度或时间效率方面存在局限性.
研究的目的:
- 引入一种新的编码激发技术,即巴克卷曲的相互直角的戈莱补充代码 (BMOGCC).
- 通过结合巴克代码和相互直角的戈莱补充代码 (MOGCC) 来解决现有方法的局限性.
- 评估BMOGCC在超声波测试应用中的性能.
主要方法:
- 通过将巴克代码与MOGCC进行卷曲,开发了巴克卷曲互直的Golay补充代码 (BMOGCC).
- 进行数值模拟和实验室实验以评估BMOGCC的性能.
- 评估的关键性能指标:侧叶峰值 (PSL),主叶增益 (MG) 和时间分辨率.
主要成果:
- 与独立的巴克代码或MOGCC相比,BMOGCC显示了显著更高的主叶增益 (MG).
- 拟议的方法保持低峰侧叶水平 (PSL).
- BMOGCC保留了超声波测试信号的时间分辨率.
结论:
- 在超声波测试中,BMOGCC有效地增强了信号能量和信号噪声比.
- 与CGC等传统方法相比, 新的代码提供了更高的时间效率.
- 在非破坏性测试中,BMOGCC为提高信号质量和测量效率提供了一个有希望的解决方案.
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