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An equivalent electrical circuit design for pipeline corrosion monitoring based on piezoelectric elements

Kolbadinejad, M ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1007/s12206-013-0130-y
  3. Publisher: 2013
  4. Abstract:
  5. Underground pipelines are important infrastructure for transporting energy resources, particularly water and oil. Due to the high risk of damage and possible consequences, close monitoring of pipelines is a serious challenge for researchers and decision makers. Piezoelectric sensors/actuators are being used to monitor the physical characteristics of pipelines, including corrosion and crack. Piezoelectric ceramics as transmitters and/or receivers are connected to data concentrators in order to monitor the defects in pipelines. The performance and accuracy of this system highly depends on the accurate interpretation of the received electrical signals due to changing mechanical fields. However, due to the existence of two different fields, namely, electrical and mechanical, in this problem, simulation and interpretation of the damages occurring in pipelines is a consistent challenge. This paper proposes an equivalent electrical circuit model for a complete monitoring system which contains piezoelectric ceramics and a pipeline equivalent electrical circuit with corrosion defects and cracks through the pipeline. The pipeline is integrated with PZT sensor and actuator, in which PZT actuator generates waves along the thickness of the pipeline and its response is received by a PZT sensor. The proposed model approximates the electrical signal achieved by the PZT sensor to a complete health monitoring system. As the sensing signals in the present model are in one single field (i. e. electrical instead of mechanical and electrical), analysis and signal processing are more efficient, and the results are better understood. Numerical examples and, where applicable, simple tests have been presented to show the functionality and performance of the system
  6. Keywords:
  7. Pipeline ; Transmitter/receiver ; Electrical signal ; Equivalent electrical circuit model ; Equivalent electrical circuits ; Health monitoring system ; Mechanical and electrical ; Monitoring system ; Physical characteristics ; Piezoelectric sensors/actuators ; Actuators ; Corrosion ; Corrosion rate ; Cracks ; Energy resources ; Monitoring ; Networks (circuits) ; Petroleum transportation ; Piezoelectric ceramics ; Sensors ; Signal processing ; Pipelines
  8. Source: Journal of Mechanical Science and Technology ; Volume 27, Issue 3 , March , 2013 , Pages 799-804 ; 1738494X (ISSN)
  9. URL: http://link.springer.com/article/10.1007%2Fs12206-013-0130-y