Pipe Penetrating Radar inspection of large diameter underground pipes

Abstract

Pipe Penetrating Radar (PPR) is the underground, in-pipe application of GPR, a non destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in / 450mm) non-ferrous (concrete, PVC, HOPE, vitrified clay, etc.) underground pipes 11, 21. The

Localization, Mapping, Navigation, and Inspection Methods in In-Pipe Robots: A Review

“…Also, for localization purposes, the IMU sensor is used to keep track of the traveling distances. In [128], the authors used pipe penetrating radar (PPR) to inspect two diameter pipes (21" and 36"). Their suggested method can determine the amount of H2S corrosion in these interceptors.…”

“…The GPR data is analyzed on the pipe penetrating radar data interpretation application (PP-RADIAN). For data correlation and having more accurate results, CCTV is applied to record the pipe information simultaneously [128].…”

Microwave‐based system for non‐destructive monitoring water pipe networks using support vector machine

“…Considering L p as constant, the antenna frequency variation, ∂f r , can be expressed in terms of the changes in the effective electrical permittivity as (5) ∂f…”

“…Usual GPR systems locate pipes by using low-frequency electromagnetic waves (<1 GHz). However, due to their high cost, those devices are suitable for special maintenance [5][6][7][8]. GPR systems can also be performed with ultra-wideband antennas at microwave frequencies.…”

Study of Damage Quantification of Concrete Drainage Pipes Based on Point Cloud Segmentation and Reconstruction

“…In order to reduce the serious consequences caused by drainage pipe defects, it is very important to detect and evaluate the defects as soon as possible [4]. Currently, the main methods of pipeline inspection include sonar inspection [5], pipeline periscope inspection [6], ground-penetrating radar systems [7], pipeline closed-circuit television inspection [4], etc. Sonar detection can detect mud and foreign matter in pipelines well, but its ability to detect the structural defects of pipelines is poor.…”