基于频率域电磁法的城市地下金属管线无损探测技术  

Non-destructive detection technology for urban underground metal pipelines based on frequency-domain electromagnetic method

作　　者：张奎 ZHANG Kui(Zhejiang Mingzhou Surveying and Mapping Institute,Ningbo,Zhejiang 315100,China)

机构地区：[1]浙江明州测绘院,浙江宁波315100

出　　处：《北京测绘》2024年第5期815-821,共7页Beijing Surveying and Mapping

基　　金：中央引导地方科技发展基金(YDZX2022019)。

摘　　要：研究设计了一种地下金属管线电磁探测系统,利用双向同步控制和数字图像处理技术实现对管线位置、深度、种类等信息的探测和分析。通过锁相放大技术提高灵敏度并抑制噪声干扰。实验证明该系统可靠可行,不同位置的金属管具有不同的振幅和相位差,二次场信号随水深增加而减弱。该方法为城市金属管道无损检测提供了新的思路和方法,有望在实际应用中发挥重要作用。An electromagnetic detection system for underground metal pipelines was studied and designed,which utilized bidirectional synchronous control and digital image processing technology to detect and analyze information such as pipeline position,depth,and type.The sensitivity was improved,and noise interference was suppressed by using phase-locked amplification technology.The experiment proves that the system is reliable and feasible,and the metal pipelines at different positions have different amplitudes and phase differences.The secondary field signal decreases with increasing water depth.This method provides new ideas and methods for non-destructive testing of urban metal pipelines,and it is expected to play an important role in practical applications.

关 键 词：频率域 电磁法 金属管线 地下探测 

分 类 号：P258[天文地球—测绘科学与技术] TP214.2[自动化与计算机技术—检测技术与自动化装置]