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Table 3 Summary of acoustic detection and location technologies

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

Methods

Location conditions

Accuracy

Interference

Strengths

Weaknesses

Pipe excitation method [63]

Non-metallic pipes have a dew point

High

Small

Easy to distinguish the situation of multiple pipelines parallel

The dew point is needed, and the gas needs to be stopped

Elastic wave method [85]

Any ground surface

High

Small

Any ground surface, the result is intuitive and clear

The operation is complex and the location efficiency is low

Point vibration measurement [104]

Buried shallow enough non-metallic pipeline

Low

Large

Easy operation

Shallow depth