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