Multi-Layered Sensor Head Design for Magnetic Flux Leakage Inspection of Pipelines

用于石油和天然气管道在线检测（ILI）的最常见技术是漏磁检测 (MFL)基于方法。MFL能够检测和测量管壁中的金属损失异常。该方法适用 通过在两个永磁体环之间用磁场饱和管壁。金属损失 通过磁体之间的传感器环检测来自管壁的磁场， 从管子里漏出来。卡尔加里的Desjardins Integrity有限公司在石油管道在线检测方面具有专业知识 天然气管道。然而，当前的漏磁检测工具在区分两种异常方面存在挑战 具有不同的形态但相同的金属损失量，并确定是否出现缺陷 从内表面或外表面。通过卡尔加里大学与 Desjardins Integrity Ltd.我们建议开发一种由多层霍尔传感器组成的新型传感器头 为了克服确定不同异常和异常位置的挑战， 在管道外面。申请人在设计、制造和信号方面具有专业知识和经验 处理各种传感器。这个合作项目的成果将使Desjardins能够提出 新技术，扩大客户群。新的漏磁检测方法也将提供 更好地了解管道中的不同异常或缺陷，并将提高在线检测的准确性。 检查业务。

The most common technology used for in-line inspection (ILI) of oil and gas pipelines is magnetic flux leakage (MFL) based methods. MFL is able to detect and size metal loss anomalies in the pipe wall. The method works by saturating the pipe wall with a magnetic field, between two rings of permanent magnets. The metal loss from the pipe wall is detected by a ring of sensors between the magnets which records the magnetic field which leaks out of the pipe. Desjardins Integrity Ltd. of Calgary has expertise in in-line inspection of pipelines for oil and gas pipelines. However, the current MFL inspection tools have challenges distinguishing two anomalies that have different morphologies but the same volume of metal loss and determining whether defects occur from internal or external surfaces. Through the close collaboration between the University of Calgary and Desjardins Integrity Ltd., we propose to develop a new sensor head that consists of multi-layered hall sensors to overcome the challenges of determining different anomalies and location of anomalies whether inside or outside of pipes. The applicant has the expertise and experience in the design, manufacturing and signal processing of various sensors. The outcome of this collaborative project would enable Desjardins to come up with new technologies and broaden their customer base. The novel MFL inspection method would also provide a better understanding of different anomalies or defects in pipelines and would improve the accuracy of in-line inspection operations.