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Table 1 Summary of electromagnetic induction detection and location technologies

From: Current Trends and Perspectives of Detection and Location for Buried Non-Metallic Pipelines

Methods

Detection and location conditions

Accuracy

Interference

Strengths

Weaknesses

Direct connection [23]

Complete tracer line, dew point

High

Small

Strong signal, high SNR, high accuracy

Complete tracer line

Induction [26]

 Electric dipole

Ground surface flat and broad

Low

Large

Strong reflected signal and easy to receive

Limited by site conditions and characteristics

 Magnetic dipole

Ground surface flat and broad

Low

Large

flexible convenient and efficient to operation

Easy to interference from land stray current

Tracer probe method [33]

Open non-metal pipeline

High

Small

Accurate location and easy to operation

Pipeline diameter limited by the size of the probe