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Pulsed Eddy Current Sensing for Critical Pipe Condition Assessment.

Nalika Ulapane1, Alen Alempijevic2, Teresa Vidal Calleja3

  • 1Centre for Autonomous Systems (CB 11.09.300), Faculty of Engineering and Information Technology, University of Technology Sydney, 15 Broadway, Ultimo, NSW 2007, Australia. Nalika.Ulapane@uts.edu.au.

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Summary

Pulsed Eddy Current (PEC) sensing offers advanced non-destructive evaluation for critical water pipes. This study refines PEC inspection for urban utilities, improving wall thickness assessment of cast iron pipes.

Keywords:
Gaussian processNDENDTPECcritical pipeseddy currentssensors

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Area of Science:

  • Materials Science and Engineering
  • Non-Destructive Evaluation (NDE)
  • Electromagnetic Sensing Technologies

Background:

  • Urban water utilities rely on extensive ferromagnetic pipelines (cast iron, mild steel) requiring robust structural integrity assessment.
  • Non-Destructive Evaluation (NDE) is crucial for maintaining these critical infrastructure assets.
  • Pulsed Eddy Current (PEC) sensing has emerged as a leading NDE technique for water pipe inspection.

Purpose of the Study:

  • To present advancements in PEC inspection tailored for the specific needs of urban water utilities.
  • To address the unique challenges encountered when applying PEC sensing to water pipe systems.
  • To detail sensor architecture, design, and calibration strategies for critical pipe applications.

Main Methods:

  • Development and application of a specialized PEC sensor architecture for critical pipes.
  • Implementation of a Gaussian process-based approach to model PEC signal features and pipe wall thickness.
  • Conducting a case study on a grey cast iron pipe to validate the sensor's performance.

Main Results:

  • Demonstrated the effective behavior of the PEC sensor on a grey cast iron pipe.
  • Established a functional relationship between PEC signal features and pipe wall thickness using Gaussian processes.
  • Identified and discussed practical challenges associated with PEC inspection in the water utility sector.

Conclusions:

  • Advanced PEC sensing provides a viable NDE solution for critical water pipelines.
  • The Gaussian process model enables accurate wall thickness estimation, crucial for utility maintenance.
  • Further research and development are needed to overcome sector-specific challenges for widespread adoption.