| 郑文学,李佳音,潘振镕,刘斌,张智.同源时钟信号的平衡电磁管道裂纹检测系统研究[J].电子测量与仪器学报,2026,40(3):135-142 |
| 同源时钟信号的平衡电磁管道裂纹检测系统研究 |
| Research on balanced field electromagnetic pipeline crack detection systembased on Synchronous clock signals |
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| DOI： |
| 中文关键词: 同源时钟 平衡电磁 裂纹检测 管道内检测 信噪比 |
| 英文关键词:synchronous clock balanced field electromagnetic crack detection pipeline inspection signal to noise ratio |
| 基金项目:国家重点研发计划（2023YFF0615300）、国家自然科学基金（62301340）、辽宁省科技计划联合计划项目（2024JH2/102600220）、辽宁省“兴辽英才”计划（XLYC2403141）项目资助 |
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| Author | Institution |
| Zheng Wenxue | School of Information Science and Engineering, Shenyang University of Technology, Shenyang 110870,China |
| Li Jiayin | School of Artificial Intelligence, Shenyang University of Technology, Shenyang 110870,China |
| Pan Zhenrong | School of Information Science and Engineering, Shenyang University of Technology, Shenyang 110870,China |
| Liu Bin | School of Information Science and Engineering, Shenyang University of Technology, Shenyang 110870,China |
| Zhang Zhi | School of Artificial Intelligence, Shenyang University of Technology, Shenyang 110870,China |
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| 中文摘要: |
| 由于管道内环境复杂、裂纹尺寸微小，裂纹检测信号信噪比低。针对管道内外壁裂纹缺陷的高信噪比检测问题，提出激励与参考信号同时钟源的平衡电磁技术裂纹检测方法。阐述了平衡电磁技术管道内外壁裂纹缺陷的检测原理，利用理论与数值仿真分析了激励与接收信号间频差噪声的影响，开发了基于现场可编程门阵列（field programmable gate array，FPGA）数字正交解调的平衡电磁裂纹检测系统，完成了激励与参考信号相同时钟源的软件设计。通过实验验证了该裂纹检测系统的检测能力，结果表明，该检测系统可以实现1~7 mm表面裂纹及1~4 mm埋藏裂纹的检测；表面裂纹检测信号呈单峰单谷特征，埋藏裂纹检测信号呈双峰特征。管道现场裂纹检测牵拉实验表明，该裂纹检测系统功耗小于1.1 W，对表面裂纹检测信噪比大于41.9 dB，对埋藏裂纹检测信噪比大于36 dB，该方法适用于管道内外壁裂纹缺陷的在线检测。 |
| 英文摘要: |
| Due to the complex internal environment of pipelines and the minute dimensions of cracks, crack detection signals exhibit a low signal-to-noise ratio. To address the challenge of high-SNR detection for crack defects on both inner and outer pipeline walls, a balanced field electromagnetic crack detection method employing simultaneous clock sources for excitation and reference signals is proposed. The detection principle of balanced field electromagnetic technology for internal and external wall cracks in pipelines is elaborated. The influence of frequency difference noise between excitation and reception signals is analysed through theoretical and numerical simulations. A balanced field electromagnetic crack detection system based on FPGA digital orthogonal demodulation is developed, with software design completed for synchronising excitation and reference signals. Experimental validation confirms the system’s detection capability, demonstrating its ability to detect surface cracks ranging from 1 to 7 mm and buried cracks from 1 to 4 mm. Surface crack detection signals exhibit a single peak and valley characteristic, while buried crack signals display a double peak characteristic. Field crack detection pulling tests on pipelines demonstrated that the system consumes less than 1.1 W of power, achieving a signal-to-noise ratio exceeding 41.9 dB for surface crack detection and over 36 dB for buried crack detection. This method is suitable for inline inspection of crack defects on both the inner and outer walls of pipelines. |
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