脉冲调制瞬变电磁的接地网腐蚀检测

边美华; 邓善全; 彭丽莎; 何雨茵; 黄松岭; 朱军卫

边美华,邓善全,彭丽莎,何雨茵,黄松岭,朱军卫.脉冲调制瞬变电磁的接地网腐蚀检测[J].电测与仪表,2026,63(6):140-148.
BIAN Meihua,DENG Shanquan,PENG Lisha,HE Yuyin,HUANG Songling,ZHU Junwei.Corrosion detection in grounding network of pulse modulation transient electromagnetic technology[J].Electrical Measurement & Instrumentation,2026,63(6):140-148.

脉冲调制瞬变电磁的接地网腐蚀检测

Corrosion detection in grounding network of pulse modulation transient electromagnetic technology

DOI：10.19753/j.issn1001-1390.2026.06.015

中文关键词: 瞬变电磁法脉冲调制视电阻率腐蚀缺陷检测接地网

英文关键词:transient electromagnetic method, pulse modulation, apparent resistivity, corrosion defect detection, grounding network

基金项目:国家自然科学基金资助项目（ U23B20113）

作者中文名	作者英文名	单位
边美华	BIAN Meihua	广西电网有限责任公司电力科学研究院
邓善全	DENG Shanquan	广西电网有限责任公司电力科学研究院
彭丽莎	PENG Lisha	清华大学电机工程与应用电子技术系,北京市
何雨茵	HE Yuyin	广西电网有限责任公司电力科学研究院
黄松岭	HUANG Songling	清华大学电机工程与应用电子技术系,北京市
朱军卫	ZHU Junwei	广西电网有限责任公司电力科学研究院

摘要点击次数: 167

中文摘要:

瞬变电磁法，凭借其非开挖、受地形影响小的独特优势，已经在地面及地下结构的无损检测领域，特别是接地网腐蚀缺陷的检测中，得到了广泛的应用和认可。为了进一步突破当前瞬变电磁探测系统在检测效率、精度以及适应性方面的局限性，文中提出一种基于脉冲调制的瞬变电磁检测方法。结合扫描成像，可以有效检测和定位接地网腐蚀位置，通过理论推导建立脉冲调制缺陷检测模型，定量分析脉冲调制信号峰值信息和视电阻率映射关系，并进行了灵敏度分析和调制频率选择分析，基于COMSOL Multiphysics 计算的正演接地网瞬变响应信号，结合扫描成像，深入分析3×3接地网几种典型缺陷位置的成像结果，证明所提方法的有效性和可行性，通过实验验证，证明该方法为接地网腐蚀缺陷的无损检测提供了一种新的、更为高效的解决方案。

英文摘要:

The transient electromagnetic method, with its unique advantages of non-excavation and little influence by terrain, has been widely used and recognized in the field of non-destructive testing of surface and underground structures, especially in the detection of corrosion defects in grounding networks. In order to further break through the limitations of the current transient electromagnetic detection system in terms of detection efficiency, accuracy and adaptability, this paper proposes a transient electromagnetic detection method based on pulse modulation. Combined with scanning imaging, the corrosion location of the grounding network can be effectively detected and located. A pulse modulation-based defect detection model is established through theoretical derivation. This model quantitatively analyzes the mapping relationship between the peak information of the pulse-modulated signal and apparent resistivity, accompanied by sensitivity analysis and modulation frequency selection analysis. Leveraging transient response signals of the grounding grid computed using COMSOL Multiphysics in conjunction with scan imaging, the imaging results for several typical defect locations within a 3×3 grounding grid are thoroughly analyzed. This analysis demonstrates the effectiveness and feasibility of the proposed method. Experimental validation confirms that this approach provides a novel and more efficient solution for the non-destructive detection of corrosion defects in grounding networks.

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